# US 11,029,514 B2 · Antireflection film and its use on a substrate

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- Number: US 11,029,514 B2
- Document ID: US11029514B2
- Status: Granted
- Kind: B2
- Application number: 16/310,112
- Filed: 2017-06-15
- Published: 2019-06-13
- Granted: 2021-06-08
- Earliest claimed: 2016-06-15
- Assignees: Hungaro Lux Light Kft.
- Applicants: Hungaro Lux Light Kft.
- Inventors: Zoltán Hórvölgyi; Emöke Albert; Lenke Kócs; Csaba Ferenc Major; Jánosné Kabai
- Web page: https://patentgrep.com/patent/US11029514B2

## CPC

- C09D 5/00: Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes
- C08J 7/04: Coating
- G02B 1/11: Anti-reflection coatings
- G02B 27/00: Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- C03C 17/004: {Coating the inside}
- C03C 17/005: {Coating the outside}
- C03C 2217/734: comprising an alternation of high and low refractive indexes
- C03C 2218/111: by dipping, immersion
- C03C 2218/113: by sol-gel processes
- C03C 2218/365: Coating different sides of a glass substrate
- C08J 2369/00: Characterised by the use of polycarbonates; Derivatives of polycarbonates
- C09D 5/006: {Anti-reflective coatings}
- F21V 3/10: characterised by coatings
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR

## Abstract

This disclosure relates to an antireflection film, as well as its use on a substrate (3) to decrease a fracture of light striking the substrate (3) reflected by said substrate (3), wherein said coating is formed of a transparent first layer (1) applied on the substrate (3) and a transparent second layer (2) on said first layer (1). The essence of the solutions according to this disclosure is that thickness (d1) of the first layer (1) ranges from 10 to 70 nm and refractive index (n1) of said first layer (1) satisfies the relation 1.05<n1<1.35 within the wavelength range of 375 to 1000 nm, and wherein thickness (d2) of the second layer (2) ranges from 30 to 100 nm and refractive index (n2) of said second layer (2) satisfies the relation 1.25<n2<1.5 within the wavelength range of 375 to 1000 nm, and wherein n1<n2 also holds.

## Claims

### Claim 1

An antireflection coating comprising:
a transparent first layer (1) applied on a substrate (3) of low refractive index (nsubstrate); and
a transparent second layer (2) over the first layer (1),
wherein thickness (d1) of the first layer (1) ranges from 10 to 70 nm and refractive index (n1) of said first layer (1) satisfies 1.05<n1<1.35 within an entire wavelength range of 375 to 1000 nm, and
wherein thickness (d2) of the second layer (2) ranges from 30 to 100 nm and refractive index (n2) of said second layer (2) satisfies 1.25<n2<1.5 within the entire wavelength range of 375 to 1000 nm, and
wherein n1<n2.

### Claim 2 (depends on 1)

The antireflection coating according to claim 1, wherein the substrate (3) for the antireflection coating is transparent within the wavelength range of 375 to 1000 nm.

### Claim 3 (depends on 2)

The antireflection coating according to claim 2, wherein the antireflection coating is formed on both side surfaces of the substrate (3).

### Claim 4 (depends on 2)

The antireflection coating according to claim 2, wherein the substrate (3) forms an envelope or at least a part of an envelope of a light emitting device.

### Claim 5 (depends on 2)

The antireflection coating according to claim 2, wherein the substrate (3) is an optical lens.

### Claim 6 (depends on 1)

The antireflection coating according to claim 1, wherein the low refractive index (nsubstrate) of said substrate (3) satisfies nsubstrate<2.5.

### Claim 7 (depends on 1)

The antireflection coating according to claim 1, wherein said substrate (3) is made of at least one substance chosen from the group consisting of glass, quartz glass and polycarbonate.

### Claim 8

A method comprising using an antireflection coating on a substrate (3) to decrease a fraction of light striking the substrate (3) reflected by said substrate (3), wherein refractive index (nsubstrate) of the substrate (3) satisfies nsubstrate<2.5, and wherein said antireflection coating applied on said substrate (3) is formed of a first layer (1) and a second layer (2) over the first layer (1), wherein thickness (d1) of the first layer (1) ranges from 10 to 70 nm and refractive index (n1) of said first layer (1) satisfies 1.05<n1<1.35 within a wavelength range of 375 to 1000 nm, and wherein thickness (d2) of the second layer (2) ranges from 30 to 100 nm and refractive index (n2) of said second layer (2) satisfies 1.25<n2<1.5 within the wavelength range of 375 to 1000 nm, and wherein n1<n2.

### Claim 9 (depends on 8)

The method according to claim 8, further comprising the antireflection coating decreasing the fraction of light striking the substrate reflected by said substrate (3) in a broad range of wavelengths.

### Claim 10 (depends on 9)

The method according to claim 9, wherein said broad range of wavelengths ranges from about 400 nm to about 900 nm.

### Claim 11 (depends on 8)

The method according to claim 8, further comprising the antireflection coating decreasing the fraction of light striking the substrate reflected by said substrate (3) in a broad range of angles of incidence.

### Claim 12 (depends on 11)

The method according to claim 11, wherein said broad range of angles of incidence ranges from about 0° to about 70°.

### Claim 13 (depends on 8)

The method of claim 8, wherein said substrate (3) is made of at least one substance chosen from the group consisting of glass, quartz glass and polycarbonate.