Title of Invention

A METHOD FOR PRODUCING AN OPHTHALMIC LENS AND AN OPTICAL COMPONENT FOR OPTHLAMIC LENS

Abstract The invention relates to a method for producing an ophthalmic lens having at least one optical function, comprising the steps of producing an optical component (10) by incorporating at least one active material (2) formed in at least part of the component and distributed in parallel with a surface of the component, the active material having an irradiation - modifiable optical property; and selectively irradiating portions (4,5) of the active material along the surface of the component (10) to obtain the optical function by modulating said property from one portion to another, said portions having dimensions smaller than 1 mm, wherein the active material (2) is distributed prior to step (b) in portions (4) separated from one another by walls extending perpendicular to the surface of the component.
Full Text

METHOD FOR PRODUCING AN OPHTHALMIC LENS AND OPTICAL
COMPONENT SUITABLE FOR IMPLEMENTING SAID METHOD
The present invention relates to a method for
producing an ophthalmic lens, and an optical component
suitable for implementing said method.
Ophthalmic lens here means any optical component
made from mineral and/or organic material, at least
partially transparent and suitable for being placed
before a wearer's eye, regardless of the optical
function of said component. It may in particular have
an antiglare protective function by absorption of part
of the light, called antisolar function, a contrast
reinforcing function by coloration or by polarization
filtering, an ametropia correcting function, etc. It
may in particular be an afocal, unifocal, bifocal,
multifocal or progressive lens.
Ametropia correcting lenses are conventionally
produced by forming a transparent material with a
refractive index higher than air. The shape of the
lenses is selected so that the refraction at the
interfaces between the material and the air causes
appropriate focusing of the light on the wearer's
retina. The lens is generally cut out to be fit into a
frame, with an appropriate positioning with regard to
the pupil of the corrected eye.
In certain distribution circuits, blanks of
corrective lenses that are manufactured industrially
are finished to adapt them to the ametropia of an eye
to be corrected. The finish consists for example in
machining and polishing the back of the blank. This
method combines the industrial production of the
blanks, thereby reducing their cost, and the need to
personalize the correction. However, the reshaping of
lenses according to the wearer's needs requires
specialized tools and skills. These must be available
close to the place of distribution to satisfy the

current desire for rapid delivery of the lenses. This
creates a strong need for investment and organization.
In the case of optical functions other than
ametropia correction, the personalization possibilities
are highly restricted. The wearer is generally offered
a choice among a small number of lens colors, degrees
of light absorption, sometimes polarizations, which
correspond to lens models or blanks available ex-works.
It is conceivable to increase the number of
possibilities offered, but this would be to the
detriment of the unit production cost. The
possibilities of varying an absorption or coloration
parameter along the lens surface are even more limited,
and in any case are not appropriate to the individual
needs or desiderata of the wearers.
It is an object of the present invention to
propose a method for producing ophthalmic lenses which
offers great flexibility of adaptation to the
individual cases of wearers.
For this purpose, the invention proposes a
method for producing an ophthalmic lens having at least
one optical function, comprising the following steps:
a) producing an optical component incorporating at
least one active material distributed parallel to a
surface of the component, the active material having an
irradiation-modifiable optical property; and
b) selectively irradiating portions of the active
material along the component surface to obtain the
optical function by modulating said property from one
portion to another, said portions having dimensions
smaller than 1 mm.
In the inventive method, step a) for producing
the optical component may be independent of or slightly
dependent on the quantitative aspects of the optical
function of the lens. It is therefore common to the
production of lenses of various types. The industrial
facilities used for this step accordingly serve to
produce a very large number of components, thus leading

to reduce the unit cost of each component thereby
produced.
Step b) serves to program the optical function
of the lens. This programming is carried out by
inscribing the optical function in the optical
component, by irradiating portions of the active
material. A differentiation is thereby obtained between
the lenses, which serves to produce a line of
diversified lenses, covering a wide range of degrees of
completion of the optical function, and optionally, of
optical functions of different types. In particular,
the optical function of an ophthalmic lens obtained by
the inventive method may comprise an antisolar effect
and/or an ametropia correction.
Thanks to the invention, the customisation of
the ophthalmic lenses is delayed in the progress of the
lens production process. This causes more efficient
manufacture and more economical inventory control. This
is because step a) for producing the optical components
can be carried out centrally in relatively large
capacity industrial units and step b) of irradiation to
program the optical function of each lens can be
carried out by the distributor, according to the
desiderata and/or the ametropia characteristics of each
client. It is then sufficient for the distributor to
have only a reserve stock of optical components of a
single model or of a limited number of models, thereby
simplifying his inventory control.
The inscription of the optical function is
obtained by modulating the optical property between
portions of active material whereof the dimensions
parallel to the surface of the optical component are
smaller than 1 mm. Each portion therefore constitutes a
pixel to which a value of the optical property is
attributed.
Thus, according to the invention, the optical
function is brought to the lens in pixelized form. For
this purpose, the optical function is defined according

to variable levels of an optical property evaluated at
pixels distributed in parallel to the surface of the
optical component. Each pixel individually modifies the
light incident on this pixel according to the
corresponding level of the optical property set during
the irradiation. The optical function of the lens
thereby results from the combination of the elementary
contributions of all the pixels with the modification
of the light passing through the lens. Thanks to this
pixelization of the optical function, the optical
function can be inscribed in the lens rapidly, simply
and accurately.
The high accuracy according to which the
optical function can be defined in the irradiation step
b) is a further advantage of the invention. In
particular, an ametropia correction inscribed in the
optical component according to the inventive method can
be adapted exactly to the degree of ametropia to be
corrected. This can eliminate the need for the
subsequent finishing of the lens surfaces by mechanical
means according to the degree of ametropia of a
particular client.
The modifiable optical property of the active
material may be of various types. To obtain a sunlens,
the modifiable optical property may comprise a light
absorption by the active material or a color thereof.
Thus, a more or less dark or variable color lens can be
obtained by using irradiation characteristics adapted
for imparting the desired level of light absorption or
the desired color to the active material.
The modifiable optical property may also
comprise a refringence of the active material. A light
wave passing through one of the portions of the active
material is then phase-shifted according to the optical
path corresponding to the passage through this portion.
The optical path is equal to the product of the
thickness of the portion of active material and its
refractive index. By appropriately setting the

refractive index in each portion of the active material
during irradiation step b), the phase, and consequently
the vergence of the light wave exiting the lens, can be
adapted to obtain a predefined ametropia correction.
According to a preferred embodiment of the
invention, the portions of the active material have
dimensions of between 5 µm (microns) and 100 µm
parallel to the surface of the lens component. The
various pixels then cannot be discerned individually by
the naked eye, and the lens has a continuous visual
appearance. This produces an excellent visual comfort.
Furthermore, no iridescence is perceptible, so that the
lens raises no esthetic problems.
A method for producing an ophthalmic lens
according to the invention may further comprise the
following step, carried out after step b):
c) heating the optical component, to make the
active material insensitive to another irradiation.
The state of the active material, as resulting
from the irradiation of step b) , is then definitively
fixed during the heating. It can no longer be modified
by another irradiation occurring during the use of the
lens.
The invention also relates to an optical
component for ophthalmic lens, incorporating at least
one active material distributed parallel to a surface
of the component, the active material having an
irradiation-modifiable optical property for obtaining a
modulation of said property between portions of the
active material having dimensions smaller than 1 mm.
The modifiable optical property may comprise a light
absorption and/or a refringence of the active material.
Other features and advantages of the present
invention will appear from the description below of
several nonlimiting exemplary embodiments, with
reference to the drawings appended hereto, in which:
Figure 1 shows an optical component suitable
for implementing the invention;

Figures 2a and 2b are respective cross sections
of two optical components according to Figure
1;
Figure 3 shows the irradiation step of a method
according to the invention;
Figures 4a and 4b show two examples of
distribution of portions of active material for
optical components respectively according to
Figures 2a and 2b;
Figures 5a and 5b are two diagrams of variation
of an optical parameter for ophthalmic lenses
produced according to the invention; and
Figure 6 shows an optical component suitable
for a particular implementation of the
invention.
The optical component 10 shown in Figure 1 is a
blank for spectacle lens. This blank may have a
diameter of 6 cm, for example. In a manner known per
se, the lens ready for assembly with a frame is
obtained by trimming the blank 10 along a contour
corresponding to the frame. This contour is shown by a
dotted line in Figure 1.
Figures 2a and 2b show two initial
configurations of the optical component, which
correspond to two different ways of defining the pixels
of inscription of the optical function in the lens. In
the case of a configuration according to Figure 2a, the
pixels are not defined in the optical component before
the irradiation stage. Conversely, an optical component
having a configuration according to Figure 2b initially
has pixels which are individually defined during the
manufacture of the optical component, by their
respective dimensions, their respective shape and their
respective structure.
According to a first configuration of the
optical component (Figure 2a) , the active material is
distributed in a substantially continuous layer in at
least part of the component. The lens 10 blank

therefore consists of a substrate 1 of transparent
mineral or organic material, covered on one of its
faces with a continuous layer of active material 2. The
layer of active material 2 may have a uniform thickness
e over the whole face of the substrate 1. Optionally,
the layer 2 may itself be covered with at least one
coating 3. Such a coating 3 may in particular have an
antireflecting coating, a hard coating to impart
improved scratch resistance to the lens, or a water-
repellent coating. The layer of active material 2 and
the coating 3 may be applied to the substrate 1 by one
of the methods known to a person skilled in the art.
According to the second configuration (Figure
2b) , the active material is distributed in portions 4
separated from one another and formed in at least part
of the component. By way of example, the portions 4 are
arranged on one of the faces of the substrate 1 which
is of transparent material. They are adjacent to one
another and form a mesh so as to cover the entire upper
face of the substrate 1. The portions 4 can be formed
directly in the substrate 1 or in a layer of additional
material added onto the substrate 1. Each portion of
active material 2 has a thickness e. A coating 3 may
also be placed above the portions 4.
Preferably, in the various possible
configurations of the optical component, the thickness
e of the active material 2 is greater than 10 µm in the
component. The optical function resulting from the
modulation of the optical property of the active
material 2 may thereby have a high amplitude. As an
example, in the case of the modulation of the
absorption coefficient of the active material 2, very
dark lenses can be obtained. This is because the
thickness of the absorbing active material is
sufficient to obtain a considerable reduction of the
light intensity, in a proportion of up to 90% of the
incident light, for example. The inventive method

therefore enables to produce sunlenses procuring
effective protection.
Similarly, when the modulated optical property
is the refringence of the active material, strong
ametropia corrections can be obtained. This is because,
since the variations in the optical path resulting from
the modulation of the refractive index are proportional
to the thickness of the active material, a thickness
thereof of more than 10 µm enables to obtain wide
variations of the optical path between various points
of the lens surface.
The irradiation of the active material 2 to
inscribe the optical function in the lens 10 blank can
be carried out in various ways. In particular, it can
be carried out by exposing the active material 2 to an
appropriate beam through a mask. Such a mask has zones
essentially transparent to the beam, zones that are
partially transparent and/or opaque zones. By selecting
the quantity of beam energy received by each portion of
the active material 2, the optical property is fixed in
this portion at a predefined level. The quantity of
beam energy received by each portion may be varied by
changing the power of the beam and/or the exposure
time.
The beam used for irradiating the portions of
active material may be of different types: a beam of
electromagnetic radiation, in particular ultraviolet
radiation, or an electron beam. Known irradiation
sources can be used, selected according to the type of
beam. Moreover, during irradiation, all the portions of
the active material 2 may be exposed simultaneously, or
certain portions of the active material 2 can be
irradiated successively.
Advantageously, the irradiation is controlled
so that the optical property is modulated discretely
according to a predefined set of values quantifying
this property. Digital control of the irradiation can
then be used, procuring great ease of programming. For

the optical function of the lens to be definable very
accurately, the predefined set of values preferably
comprises at least ten distinct values.
Figure 3 shows a preferred embodiment of the
invention, which does not require the use of a mask for
irradiation. The lens blank 10 can be one of the first
or second configurations described above. Irradiation
is carried out using a laser 100 producing a light beam
101, for example ultraviolet light. The blank 10 is
placed in front of the beam 101. The distance between
the laser 100 and the blank 10 is adjusted so that the
active material 2 is located at a point of convergence
of the beam 101. The beam 101 is moved parallel to the
surface of the blank 10 to irradiate different portions
of the active material 2 during successive exposures.
An inscription of the optical function is thereby
obtained, with a high resolution parallel to the blank
surface. When the blank 10 comprises a coating 3, this
one must be transparent to the beam 101.
The laser beam drive and positioning mechanisms
during the inscription of the optical function may be
of the type of those conventionally employed in optical
compact disc etching machines. Using a computer file
describing the quantification of the optical function
to be provided, these mechanisms and the laser energy
supply are controlled to carry out the desired
modulation of the optical property of the active
material between different pixels.
When the active material 2 is initially
distributed in a continuous layer in the blank 10, as
shown in Figure 2a, the shape of the portions of the
active material 2 which corresponds to different pixels
is determined during the irradiation. If the
irradiation is carried out through a mask, the pixels
reproduce the motif of the mask. If the irradiation is
carried out using a focused beam, the pixels correspond
to the section of the beam in the layer of active
material during successive exposures.

Figure 4a shows one possible distribution of
the pixels for a blank 10 having the configuration
shown in Figure 2a. This distribution corresponds to a
mesh by substantially circular pixels 5. p is the
distance between 2 neighboring pixels, and corresponds
to the elementary translation distance of the beam 101
when irradiation is carried out according to Figure 3 .
D is the diameter of each pixel 5, and substantially
corresponds to the diameter of the laser beam 101 at
the level of the active material 2.
When the active material 2 is initially
distributed in separate portions of the blank 10, as
shown in Figure 2b, the irradiation conditions are
adjusted so that each portion 4 of active material 2 is
exposed to the radiation under same conditions. The
modulation of the optical property is then based on the
distribution and the shape of the portions as they
exist before irradiation. According to Figure 4b, the
portions 4 may each have a hexagonal shape of width D
and two neighboring portions are separated by a wall of
thickness d. The mesh pitch p is then equal to the sum
of D and d.
In general, the pitch p is preferably between
5 µm and 100 µm. The lens accordingly has a uniform
visual appearance devoid of iridescence. As an example,
D may be equal to 20 µm and, for an implementation with
initially separate portions of active material, d may
be equal to 0.2 µm. The surface of the blank 10 then
comprises a very large number of portions of the active
material 2 forming pixels, in each of which the optical
function is adjusted. As an example, more than one
million pixels can be used.
The mesh of the surface of the optical
component by pixels can be of any shape whatever. In
particular, the irradiated portions of the active
material may be distributed in the component in a
hexagonal mesh. Such a mesh allows for a high coverage
rate of the surface of the optical component for

numerous shapes of portions of active material. In
particular, a hexagonal mesh is appropriate when the
pixels are circular (Figure 4a) or hexagonal (Figure
4b) .
In certain cases, it may be advantageous to
distribute the pixels in an irregular mesh. Undesirable
diffraction effects can thereby be eliminated. Also in
certain cases and according to the needs of the
invention, the pixels may be square or rectangular. The
various shapes of pixels may also be combined.
The active material 2 may comprise a
photoinitiator and/or a photopolymer. The
photoinitiator and/or the photopolymer is sensitive to
irradiation when this latter is carried out in
appropriate conditions.
Documents EP 1 225 458 and US 6 309 803
describe an active material sensitive to ultraviolet
light of wavelength 365 nm (nanometers) . Such active
material can polymerize in two different phases, which
are selected by the polymerization conditions applied
to the optical component. The first phase corresponds
to an organic polymerization network. It is formed when
the active material is irradiated. The second phase
corresponds to a mineral polymerization lattice and is
formed when the active material is heated. The
refractive index of the first phase is lower than that
of the second phase.
Such active material 2 can be deposited on the
substrate 1 by dipping the substrate 1 in a solution of
precursors. Such deposition process is commonly
referred to as "dip-coating". The solution comprises
two precursors capable of together forming an organic
polymerization lattice or a mineral polymerization
lattice. The two precursors are 3(trimethoxysilyl)
propyl methacrylate and the product of the reaction
between zirconium n-propoxide and methacrylic acid.
Irgacure 1800, commercially available from supplier
CIBA for example, is further added to the precursor

solution. After dipping the substrate 1 in the
precursor solution, the substrate 1 is heated to a
temperature equal to 60°C or higher for about 3 0
minutes. A dried layer of active material 2 is thereby
obtained on the substrate 1.
When a portion of the active material 2 thus
obtained is irradiated with ultraviolet light of
wavelength 365 nm, the organic polymerization lattice
is formed, with a density that depends on the
irradiation time and intensity. The substrate 1 is then
heated to a temperature equal to 100°C or higher for 20
to 45 minutes. The mineral polymerization lattice is
then formed. In the portions of active material 2 which
have not been previously irradiated, it creates a pure
phase having a high refractive index. In the portions
of active material 2 which have been previously
irradiated, the mineral polymerization lattice is
formed from quantities of precursors which have not
been consumed by the organic polymerization.
Intermediate refractive index values between the
extreme values corresponding to the pure mineral
lattice and the pure organic lattice are thereby
obtained in the irradiated portions.
On completion of the polymerization heating
according to the mineral lattice, the two precursors
are fully consumed. The active material 2 is then
insensitive to another irradiation by ultraviolet light
at the wavelength of 3 65 nm.
In a particular embodiment of the invention,
the irradiation is controlled so that the modulation of
the optical property exhibits jumps between certain
adjacent portions of the active material. Figure 5a
shows an example of such variations for an active
material 2 with modifiable refringence. The
distribution of the refractive index only depends on
the distance r between a point of the layer of active
material 2 and the center of the blank 10. The distance
r is plotted on the x-axis and the value of the

refractive index n is plotted on the y-axis. The blank
10 is divided into concentric rings Z1-Z4. The
refractive index n varies progressively (continuously
or by elementary jumps corresponding to the resolution
of the index of the inscription system) within each of
the rings Z1-Z4 between a minimum value, denoted nMIN and
a maximum value, denoted nmax .At the borderline between
two successive rings, the refractive index jumps from
the value nmax to the value nMIN. The optical component
thereby obtained has a divergent Fresnel lens function,
while having a uniform thickness. A myopia corrective
lens can thereby be obtained, which has an optical
strength higher than those of lenses prepared according
to the invention with a continuous variation of the
refractive index over the entire surface of the blank.
Figure 5b corresponds to Figure 5a for a
hypermetropia corrective lens. The optical function
obtained is that of a convergent Fresnel lens.
In certain particular embodiments of the
invention, the optical component incorporates a
plurality of active materials selected so that one
respective optical property of each active material can
be modified selectively by irradiating the optical
component. Each active material is distributed parallel
to the component surface. A distinct optical function
can then be inscribed in the optical component for each
active material, by irradiating the component under
appropriate conditions corresponding to each of the
active materials. The overall optical function of the
optical component thereby produced corresponds to the
superimposition of the optical functions inscribed
using each of the active materials. When the inscribed
optical functions are of a cumulable type, the overall
optical function may have a particularly high
amplitude. As an example, if the inscription of each
active material corresponds to a myopia corrective
function, a lens adapted to a particularly high degree
of myopia may be obtained.

Advantageously, the active materials are
distributed in respective layers superimposed within
the optical component. The optical component can then
be produced simply. In particular, the active materials
may be deposited successively or added onto a
substrate, using an appropriate deposition method for
each of them. Figure 6 shows a lens 10 blank which
comprises a substrate 1, with three different layers of
active materials, referenced 2a-2c, superimposed on one
face thereof.
The irradiation conditions for selectively
modifying the optical property of one of the active
materials can be determined by at least one
photoinitiator incorporated in each active material.
The various active materials thereby advantageously
contain respective photoinitiators which are sensitive
to radiations of distinct wavelengths.
It is understood in the context of the
invention that the substrate 1 may have its own optical
function. This optical function of the substrate 1 is
accordingly superimposed or cumulates, with the optical
function provided by the modulation of the optical
property of the active material 2. For example, the
substrate 1 may be of an absorbing material which
imparts an antisolar function to the final lens, and
the irradiation of the active material may impart an
ametropia correcting function. A lens that is both
antisolar and corrective is thereby obtained. The
substrate 1 may also have its own correcting function,
which may result in particular from a difference in
thickness between the center and the periphery of the
substrate 1. An additional optical function of
ametropia correction provided by the modulation of the
refringence of the active material 2 is then cumulated
with the correction function of the substrate 1.
Finally, although the invention has been
described in detail for a spectacle lens, it is also
understood that it can be applied identically to other

ophthalmic elements such as, for example, a helmet
visor, or a mask lens. This may, for example, be a
motorcyclist or aircraft pilot helmet, or a diving or
mountaineering mask.

WE CLAIM :
1. A method for producing an ophthalmic lens having at least one
optical function, comprising the steps of :
a) producing an optical component (10) by incorporating at
least one active material (2) formed in at least part of the
component and distributed in parallel with a surface of
the component, the active material having an irradiation -
modifiable optical property; and
b) selectively irradiating portions (4,5) of the active material
along the surface of the component (10) to obtain the
optical function by modulating said property from one
portion to another, said portions having dimensions
smaller than 1 mm,
wherein the active material (2) is distributed prior to step
(b) in portions (4) separated from one another by walls
extending perpendicular to the surface of the component.

2. The method as claimed in claim 1, wherein the portions (4,5) of
the active material have dimensions of between 5 and 100 µm
parallel to the component surface.
3. The method as claimed in claim 1 or 2, wherein the portions
(4,5) of the active material are distributed in the component
(10) with a hexagonal mesh.
4. The method as claimed in claim 1, wherein the active material
(2) has a thickness higher than 10 µm within the optical
component (10).
5. The method as claimed in claim 1, wherein certain portions
(4,5) of the active material (2) are successively irradiated.
6. The method as claimed in claim 1, wherein the irradiation is
carried out using a laser (100).
7. The method as claimed in claim 1, wherein the active material
(2) contains a photoinitiator.

8. The method as claimed in claim 1, wherein the active material
(2) contains a photopolymer.
9. The method as claimed in claim 1, wherein the modifiable
optical property comprises an absorption of light by the active
material (2).
10.The method as claimed in claim 1, wherein the modifiable
optical property comprises a refringence of the active material (2).
11.The method as claimed in claim 1, wherein the irradiation is
controlled so that the optical property is modulated discretely
according to a predefined set of values quantifying said optical
property.
12.The method as claimed in claim 1, wherein the predefined set
of values comprises at least ten distinct values.
13.The method as claimed in claim 1, wherein the irradiation is
controlled so that the modulation of the optical property exhibits
jumps between certain adjacent portions (4,5) of the active
material (2).

14.The method as claimed in claim 10, wherein the optical
function comprises an ametropia correction.
15.The method as claimed in claim 14, wherein the irradiation is
controlled so that the modulation of the refringence of the active
material (2) exhibits jumps between certain adjacent portions
(4,5) of the active material (2) in order to impart a Fresnel lens
property to the lens.
16.The method as claimed in claim 1, comprising the step of:
c) heating the optical component (10) after irradiation, to make
the active material (2) insensitive to another irradiation.
17.The method as claimed in claim 1, wherein the optical
component (10) incorporates a plurality of active materials (2a,
2b, 2c) selected so that a respective optical property by each
active material can be modified selectively by irradiating the
optical component, each active material being distributed parallel
to the surface of the optical component (10).

18.The method as claimed in claim 17, wherein the active
materials (2a, 2b, 2c) are distributed in respective superimposed
layers within the component (10).
19.The method as claimed in claim 17, wherein the active
materials (2a, 2b, 2c) contain respective photoinitiators sensitive
to radiations of distinct wavelengths.
20.An optical component (10) for ophthalmic lens, incorporating at
least one active material (2) formed in at least part of the
component, and distributed parallel to a surface of the
component, the active material having an irradiation-modifiable
optical property for obtaining a modulation of said property
between portions of the active material having dimensions smaller
than 1 mm,
wherein the active material (2) is distributed in portions (4)
separated from one another by walls extending perpendicular to
the surface of the component.

21.The component as claimed in claim 20, wherein the active
material (2) contains a photoinitiator.
22.The component as claimed in claim 20, wherein the active
material (2) contains a photopolymer.
23.The component as claimed in claim 22, wherein the active
material (2) has a thickness higher than 10 µm within the optical
component (10).
24.The component as claimed in claim 22, wherein the modifiable
optical property comprises an absorption of light by the active
material (10).
25.The component as claimed in claim 20, wherein the modifiable
optical property comprises refringence of the active material (10).
26.The component as claimed in claim 22, wherein the component
is formed by incorporating a plurality of active materials (2a, 2b,
2c), each active material having an optical property selectively
modifiable by irradiation and wherein the active material being
distributed parallel to the surface of the component (10).

27.The component as claimed in claim 26, wherein the active
materials (2a, 2b, 2c) are distributed in respective layers
superimposed within the component (10).
28.The component as claimed in claim 26, wherein the active
materials 92a, 2b, 2c) contain respective photoinitiators sensitive
to radiations of distinct wavelengths.



ABSTRACT


TITLE "A METHOD FOR PRODUCING AN
OPTHALMIC LENS AND AN OPTICAL
COMPONENT FOR OPTHLAMIC LENS"

The invention relates to a method for producing an ophthalmic lens
having at least one optical function, comprising the steps of
producing an optical component (10) by incorporating at least one
active material (2) formed in at least part of the component and
distributed in parallel with a surface of the component, the active
material having an irradiation - modifiable optical property; and
selectively irradiating portions (4,5) of the active material along the
surface of the component (10) to obtain the optical function by
modulating said property from one portion to another, said portions
having dimensions smaller than 1 mm, wherein the active material
(2) is distributed prior to step (b) in portions (4) separated from one
another by walls extending perpendicular to the surface of the
component.

Documents:

03845-kolnp-2006 abstract.pdf

03845-kolnp-2006 claims.pdf

03845-kolnp-2006 correspondence others.pdf

03845-kolnp-2006 description(complete).pdf

03845-kolnp-2006 drawings.pdf

03845-kolnp-2006 form-1.pdf

03845-kolnp-2006 form-2.pdf

03845-kolnp-2006 form-3.pdf

03845-kolnp-2006 form-5.pdf

03845-kolnp-2006 international publication.pdf

03845-kolnp-2006 international search authority report.pdf

03845-kolnp-2006 priority document.pdf

03845-kolnp-2006-claims-1.1.pdf

03845-kolnp-2006-correspondence others-1.1.pdf

03845-kolnp-2006-correspondence-1.2.pdf

03845-kolnp-2006-correspondence-1.3.pdf

03845-kolnp-2006-form-18.pdf

03845-kolnp-2006-form-26.pdf

03845-kolnp-2006-priority document-1.1.pdf

3845-KOLNP-2006-ABSTRACT.1.1.pdf

3845-KOLNP-2006-AMANDED CLAIMS.pdf

3845-KOLNP-2006-CANCELLED PAGES.pdf

3845-KOLNP-2006-CORRESPONDENCE.pdf

3845-KOLNP-2006-DESCRIPTION (COMPLETE).1.1.pdf

3845-KOLNP-2006-DRAWINGS.1.1.pdf

3845-KOLNP-2006-EXAMINATION REPORT.pdf

3845-KOLNP-2006-FORM 1.1.1.pdf

3845-KOLNP-2006-FORM 18.pdf

3845-KOLNP-2006-FORM 2.1.1.pdf

3845-KOLNP-2006-FORM 26.pdf

3845-KOLNP-2006-FORM 3.1.1.pdf

3845-KOLNP-2006-GRANTED-ABSTRACT.pdf

3845-KOLNP-2006-GRANTED-CLAIMS.pdf

3845-KOLNP-2006-GRANTED-DESCRIPTION (COMPLETE).pdf

3845-KOLNP-2006-GRANTED-DRAWINGS.pdf

3845-KOLNP-2006-GRANTED-FORM 1.pdf

3845-KOLNP-2006-GRANTED-FORM 2.pdf

3845-KOLNP-2006-GRANTED-FORM 3.pdf

3845-KOLNP-2006-GRANTED-FORM 5.pdf

3845-KOLNP-2006-GRANTED-SPECIFICATION-COMPLETE.pdf

3845-KOLNP-2006-INTERNATIONAL PUBLICATION.pdf

3845-KOLNP-2006-INTERNATIONAL SEARCH REPORT & OTHERS.pdf

3845-KOLNP-2006-PETETION UNDER RULE 137.pdf

3845-KOLNP-2006-PETITION UNDER RULE 137.pdf

3845-KOLNP-2006-REPLY TO EXAMINATION REPORT.pdf

3845-KOLNP-2006-TRANSLATED COPY OF PRIORITY DOCUMENT.pdf

abstract-03845-kolnp-2006.jpg


Patent Number 256526
Indian Patent Application Number 3845/KOLNP/2006
PG Journal Number 27/2013
Publication Date 05-Jul-2013
Grant Date 27-Jun-2013
Date of Filing 20-Dec-2006
Name of Patentee ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D'OPTIQUE)
Applicant Address 147 RUE DE PARIS,94220 CHARENTON LE PONT,FRANCE
Inventors:
# Inventor's Name Inventor's Address
1 CANO JEANS-PAUL C/O ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D'OPTIQUE) 147 RUE DE PARIS,94220 CHARENTON LE PONT,
2 COUDRAY PAUL C/O KLOE SA 1068 RUE DE LA VIEILLE POSTE,34000 MONTFELLIER,FRANCE.
PCT International Classification Number G02B3/00; G02C7/02
PCT International Application Number PCT/FR2005/001635
PCT International Filing date 2005-06-28
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 04/07,388 2004-07-02 France