# US 2019/0317338 A1 · Temporary polar patches

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- Number: US 2019/0317338 A1
- Document ID: US20190317338A1
- Status: Published application
- Kind: A1
- Application number: 16/343,160
- Filed: 2016-10-19
- Published: 2019-10-17
- Earliest claimed: 2016-10-19
- Assignees: Essilor International
- Applicants: Essilor International
- Inventors: Hao-Wen CHIU; Haifeng SHAN; Elliot FRENCH
- Web page: https://patentgrep.com/patent/US20190317338A1

## CPC

- G02C 7/086: {Auxiliary lenses located directly on a main spectacle lens or in the immediate vicinity of main spectacles}
- G02C 7/12: Polarisers
- G02C 2202/16: Laminated or compound lenses
- G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00)

## Abstract

Optical polymeric sheets with specific ranges of optical retardation, elastic modulus, and Shore A hardness were used to construct flexible polar patches. The polar patches conform to non-polarizing lenses of various diopter bases and provide polarizing efficiency that is comparable to regular polarizing lenses.

## Claims

### Claim 1

A patch for reducing through-transmittance of light to a non-polarized optical article, comprising:
a flat and flexible laminate comprising at least one polarizing film;
wherein the patch is releasably securable to the non-polarized optical article.

### Claim 2 (depends on 1)

The patch of claim 1, wherein the polarizing film comprises a polarizing film sheet laminated between a first transparent forward-facing polymeric sheet, and a second transparent rear-facing, lens-contacting polymeric sheet.

### Claim 3 (depends on 1)

The patch of claim 1, wherein the polarizing film sheet is a PVA based sheet.

### Claim 4 (depends on 2)

The patch of claim 2, wherein the first and second transparent polymeric sheets are individually selected from PVC, TPU, or PDMS (Polydimethylsiloxane).

### Claim 5 (depends on 4)

The patch of claim 4, wherein the transparent forward-facing polymeric sheet comprises an optical retardation of ≤π/5 radian and preferably ≤π/10 radian.

### Claim 6 (depends on 1)

The patch of claim 1, wherein the patch has an elastic modulus of ≤700 Mpa.

### Claim 7 (depends on 1)

The patch of claim 1, wherein the patch has a thickness of ≤200 μm.

### Claim 8 (depends on 1)

The patch of claim 1, wherein the patch has a Shore A hardness preferably ≤80.

### Claim 9 (depends on 1)

The patch of claim 1, wherein the patch is releasably securable to a non-polarized optical article by static cling.

### Claim 10 (depends on 1)

The patch of claim 1, wherein the patch is releasably securable to a non-polarized optical article with a pressure-sensitive adhesive.

### Claim 11 (depends on 10)

The patch of claim 10, wherein the pressure-sensitive adhesive is located on a lens-contacting side.

### Claim 12 (depends on 1)

The patch of claim 1, wherein the patch reduces optical transmission of light polarized in a non-vertical direction.

### Claim 13 (depends on 1)

The patch of claim 1, wherein the patch is the same size and shape of the non-polarized optical article to which it is releasably securable.

### Claim 14 (depends on 1)

The patch of claim 1, wherein the patch is not the same size and shape of the non-polarized optical article to which it is releasably securable.

### Claim 15 (depends on 14)

The patch of claim 14, wherein the elastic modulus, thickness, and Shore A hardness are selected to confer flexibility to the patch to allow for releasable attachment to a variety of non-polarized optical article shapes.