# US 10,371,967 B2 · Predefined reflective appearance eyewear lens with balance chroma enhancement visual perception

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,371,967 B2
- Document ID: US10371967B2
- Status: Granted
- Kind: B2
- Application number: 15/841,322
- Filed: 2017-12-14
- Published: 2018-11-08
- Granted: 2019-08-06
- Earliest claimed: 2017-05-08
- Assignees: Hwa Meei Optical Co., Ltd.
- Applicants: Hwa Meei Optical Co., Ltd.
- Inventors: Charles Cheng; Chih Ming Chen
- Web page: https://patentgrep.com/patent/US10371967B2

## CPC

- G02C 7/104: {having spectral characteristics for purposes other than sun-protection}
- G02C 7/102: {Photochromic filters}
- G02C 7/107: {Interference colour filters}
- G02C 7/12: Polarisers
- 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

Provided is an eyewear lens, including a lens substrate and an optical interference coating; the lens substrate is comprised of an optical material, and the optical interference coating is bonded to the lens substrate and is stacked by the composition of high and low reflectivity materials. A predefined reflective appearance color will be formed by light getting through the optical interference coating. The lens substrate contains another filter on one side surface or both side surfaces or inside the lens substrate which is complementary to the light after penetrating the optical interference coating such that the overall transmittance light tone remain neutral balance. The overall transmittance light spectrum has three pass-bands corresponding to the maximum response of the human eye cone cells, and the relatively high transmittance values of each pass-band center are approximately at 450 nm, 530 nm and 610 nm. The FWHM of each pass-band is between 3 nm and 50 nm.

## Claims

### Claim 1

A predefined reflective appearance eyewear lens with chroma enhanced visual perception, comprising:
a lens substrate and an optical interference coating,
wherein the lens substrate is comprised of an optical material, the optical interference coating is bonded to the lens substrate and is stacked by means of high and low reflective index materials, light passes through the optical interference coating to produce a reflective appearance color predefined,
wherein at least one side surface of the lens substrate, both side surfaces of the lens substrate or inside of the lens substrate comprises at least another filter and its filtered light is complementary to the light after passing through the optical interference coating to maintain the overall transmittance light color neutral balance of the lens, and the overall transmittance light spectrum has three pass-bands corresponding to the maximum response color of the human eye cone cells, and the relatively high transmittance values of the center of each pass-band are at 420 nm˜480 nm, 500 nm˜560 nm, and 580 nm˜640 nm, the full width at half maximum (FWHM) of each pass-band is between 3 nm and 50 nm,
wherein the reflected light spectrum chromaticity coordinates (Rx, Ry) of the reflective appearance color are located within the outside of a neutral balance elliptical parameter equation in the CIE 1931 XY color space chromaticity coordinates, and the overall transmittance spectrum chromaticity coordinates (Tx, Ty) of a lens are located within the inside of the neutral balance elliptical parameter equation in the CIE 1931 XY color space chromaticity coordinates, wherein the elliptical parameter equation is expressed as follows:
x=a cos(t)cos(Θ)−b sin(t)sin(Θ)+h
y=a cos(t)sin(Θ)+b sin(t)cos(Θ)+k
where:
t is the radian parameter between 0˜2π;
Θ is the elliptical rotating radian (0.66);
a, b are two radii of an ellipse (a is 0.07, b is 0.04);
h and k are the elliptical center coordinates, that is, (h, k)=(0.34, 0.32).

### Claim 2 (depends on 1)

The lens of claim 1, wherein the overall transmittance spectrum has three pass-bands of 420 nm˜480 nm, 500 nm˜560 nm, and 580 nm˜640 nm, and the relatively high transmittance value being at the center of each pass-band being at least 5% greater than the transmittance value on both bottom sides of each pass-band.

### Claim 3 (depends on 1)

The lens of claim 1, wherein the reflective appearance color of the lens is produced by the optical interference coating and another filter layer contained in the lens substrate is comprised of at least one dye.

### Claim 4 (depends on 3)

The lens of claim 3, wherein the dye is combined with the lens substrate by mean of dipping, painting or pre-mixing.

### Claim 5 (depends on 3)

The lens of claim 3, wherein the dye has a polarizing effect.

### Claim 6 (depends on 3)

The lens of claim 3, wherein the dye has a photochromic effect.

### Claim 7 (depends on 1)

The lens of claim 1, wherein the reflective appearance color of the lens is produced by the optical interference coating and another filter layer contained in the lens substrate is comprised of at least one color filter sheet.

### Claim 8 (depends on 7)

The lens of claim 7, wherein the color filter sheet is combined with the lens substrate by in-mold casting, in-mold injection or laminating adhesive.

### Claim 9 (depends on 7)

The lens of claim 7, wherein the color filter sheet has a polarizing effect.

### Claim 10 (depends on 7)

The lens of claim 7, wherein the color filter sheet has a photochromic effect.

### Claim 11 (depends on 1)

The lens of claim 1, wherein the reflective appearance color of the lens is produced by the optical interference coating and another filter layer contained in the lens substrate is comprised of another optical interference coating.

### Claim 12 (depends on 11)

The lens of claim 11, wherein the optical interference coating is combined with the lens substrate by vacuum vapor deposition or spinning coating.

### Claim 13 (depends on 1)

The lens of claim 1, wherein the material of the lens substrate is a polymeric resin or a glass.

### Claim 14 (depends on 1)

The lens of claim 1, wherein the lens substrate is formed by casting molding, injection molding or cutting and polishing.

### Claim 15 (depends on 1)

The lens of claim 1, wherein the lens substrate is a plano lens, a semi finished lens or a prescription lens.

### Claim 16 (depends on 1)

The lens of claim 1, wherein the lens is suitable for use in sunglasses, sport eyewear, safety goggles, swimming goggles or skiing goggles.