# US 11,298,222 B2 · Artificial eye lens with diffractive grating structure and method for producing an artificial eye lens

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- Number: US 11,298,222 B2
- Document ID: US11298222B2
- Status: Granted
- Kind: B2
- Application number: 16/616,028
- Filed: 2018-05-17
- Published: 2020-03-19
- Granted: 2022-04-12
- Earliest claimed: 2017-06-01
- Applicants: Carl Zeiss Meditec AG
- Inventors: Michael Kaschke; Manfred Dick; Mario Gerlach
- Web page: https://patentgrep.com/patent/US11298222B2

## CPC

- A61F 2/1654: {Diffractive lenses}
- A61F 2/1613: {having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus}
- B29D 11/023: {Implants for natural eyes}
- A61F 2002/0081: {directly machined on the prosthetic surface, e.g. holes, grooves (A61F2/30771 takes precedence)}
- A61F 2002/1683: {having filiform haptics}
- A61F 2002/1689: {having plate-haptics}
- A61F 2240/001: Designing or manufacturing processes
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)

## Abstract

An artificial eye lens (1) having an optical part (2) which has a first optical side (4) and an opposite, second optical side (5). The optical part (2) has a diffractive grating structure that contributes to an optical imaging property of the optical part (2). The diffractive grating structure is an amplitude grating (6) formed in the optical part (2) as a laser structure. A method for producing an artificial eye lens (1) where the amplitude grating (6) is produced with a laser apparatus (17), and a pulsed laser beam (22) having a pulse length of between 100 fs and 20 ps, a wavelength of between 320 nm and 1100 nm, a pulse repetition rate of between 1 kHz and 10 MHz, a focus diameter of less than 5 μm, and a power density of greater than 106 W/cm2.

## Claims

### Claim 1

An artificial eye lens having an optical part which has, viewed in the direction of an optical principal axis of the artificial eye lens, a first optical side and an opposite, second optical side, wherein the optical part has a diffractive grating structure that contributes to an optical imaging property of the optical part, wherein the diffractive grating structure is an amplitude grating formed at least partially as a bubble formation in the optical part between the first optical side and the second optical side as a laser-generated structure.

### Claim 2 (depends on 1)

The artificial eye lens of claim 1, where the amplitude grating is formed at least partially as a micro-perforation in the optical part as a laser-generated structure.

### Claim 3 (depends on 2)

The artificial eye lens of claim 2, where the amplitude grating has a first grating region configured with a first perforation density of perforation zones of the micro-perforation and a second grating region configured with a second perforation density of perforation zones of the micro-perforation that differs from the first perforation density of perforation zones.

### Claim 4 (depends on 3)

The artificial eye lens of claim 3, further comprising a first dimensioning of perforation zones of the micro-perforation.

### Claim 5 (depends on 4)

The artificial eye lens of claim 4, further comprising a second dimensioning of perforation zones of the micro-perforation that differs from the first dimensioning of perforation zones in the micro-perforation.

### Claim 6 (depends on 2)

The artificial eye lens of claim 2, wherein the amplitude grating has a first grating region configured with a first dimensioning of perforation zones of the micro-perforation and a second grating region configured with a second dimensioning of perforation zones of the micro-perforation that differs from the first dimensioning of perforation zones of the micro-perforation.

### Claim 7 (depends on 2)

The artificial eye lens of claim 2, wherein at least one perforation zone of the micro-perforation is at least partially filled with a dye.

### Claim 8 (depends on 7)

The artificial eye lens of claim 7, wherein the dye is polymerized.

### Claim 9 (depends on 7)

The artificial eye lens as claimed in claim 7, wherein a position of opaque grating regions of the amplitude grating is established in dependence on the type of the dye.

### Claim 10 (depends on 7)

The artificial eye lens of claim 7, where a number of opaque grating regions of the amplitude grating is established in dependence on the type of the dye.

### Claim 11 (depends on 10)

The artificial eye lens of claim 10, where the number of opaque grating regions of the amplitude grating is established in dependence on the quantity of the dye.

### Claim 12 (depends on 10)

The artificial eye lens of claim 10, where the number of opaque grating regions of the amplitude grating is established in dependence on the number of the perforation zones that are at least partially filled with dye.

### Claim 13 (depends on 10)

The artificial eye lens of claim 10, where the number of opaque grating regions of the amplitude grating is established in dependence on the position of the perforation zones that are at least partially filled with dye.

### Claim 14 (depends on 1)

The artificial eye lens of claim 1, wherein the amplitude grating has grating rings that at least partially extend around an optical principal axis of the optical part as grating regions.

### Claim 15 (depends on 1)

The artificial eye lens of claim 1, wherein the amplitude grating is configured to be located inside in the optical part.

### Claim 16 (depends on 1)

The artificial eye lens of claim 1, wherein at least one optical grating structure that is separate from the amplitude grating is formed on at least one optical side.

### Claim 17 (depends on 16)

The artificial eye lens of claim 16, wherein the separate optical grating structure is a phase grating.

### Claim 18 (depends on 17)

The artificial eye lens of claim 17, wherein the phase grating is achromatized for at least two wavelengths.

### Claim 19

A method for producing an artificial eye lens, the method comprising:
causing an amplitude grating to be produced in an optical part of the artificial eye lens, wherein the optical part has, viewed in the direction of an optical principal axis of the artificial eye lens, a first optical side and an opposite, second optical side, with a laser apparatus that acts on the optical part, wherein the amplitude grating is formed, by the laser apparatus, at least partially as a bubble formation in the optical part between the first optical side and the second optical side.

### Claim 20 (depends on 19)

The method of claim 19, wherein causing the amplitude grating to be produced in the optical part of the artificial eye lens comprises causing the laser apparatus to generate a pulsed laser beam having a pulse length between 100 fs and 20 ps, a wavelength of between 320 nm and 1100 nm, a pulse repetition rate of between 1 kHz and 10 MHz, a focus diameter of less than 5 μm, and a power density of greater than 106 W/cm2.

### Claim 21

An artificial eye lens produced by causing an amplitude grating to be produced in an optical part of the artificial eye lens, wherein the optical part has, viewed in the direction of an optical principal axis of the artificial eye lens, a first optical side and an opposite, second optical side, with a laser apparatus by causing the laser apparatus to generate a pulsed laser beam that acts on the optical part to form the amplitude grating, wherein the amplitude grating is formed, by the laser apparatus, at least partially as a bubble formation in the optical part between the first optical side and the second optical side.