# US 10,371,867 B2 · Optical component and method of manufacturing the same

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- Number: US 10,371,867 B2
- Document ID: US10371867B2
- Status: Granted
- Kind: B2
- Application number: 13/851,679
- Filed: 2013-03-27
- Published: 2013-08-29
- Granted: 2019-08-06
- Earliest claimed: 2010-09-29
- Assignees: Nikon-Essilor Co., Ltd.
- Applicants: Nikon-Essilor Co., Ltd.
- Inventors: Masaoki Tomoda; Satoru Ito; Kei Ishimura; Hirotatsu Okumura
- Web page: https://patentgrep.com/patent/US10371867B2

## CPC

- G02B 1/105
- G02B 1/11: Anti-reflection coatings
- B05D 5/06: to obtain multicolour or other optical effects (B05D5/02 takes precedence)
- C23C 14/221: {Ion beam deposition (C23C14/46, C23C14/48 take precedence)}
- C23C 14/24: Vacuum evaporation
- G02B 1/113: using inorganic layer materials only
- G02B 1/18: Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films (G02B1/16 takes precedence)
- G02C 7/104: {having spectral characteristics for purposes other than sun-protection}
- G02C 7/105: {having inhomogeneously distributed colouring}
- G02B 1/14: Protective coatings, e.g. hard coatings
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- 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

An optical component includes: a plastic base which has a convex surface and a concave surface; and a multilayer film which is disposed on at least the convex surface of the plastic base. The multilayer film has an average reflectivity of 2% to 10% over a wavelength range of 400 nm to 500 nm.

## Claims

### Claim 1

A spectacle lens comprising:
a plastic base which has a convex surface and a concave surface; and
a multilayer film which is disposed on at least the convex surface of the plastic base,
wherein the multilayer film has an average reflectivity of 4.2% to 10% over a wavelength range of 400 nm to 500 nm of blue light.

### Claim 2 (depends on 1)

The spectacle lens according to claim 1,
wherein the multilayer film has a reflectivity of 1.5% or less over a wavelength range of 580 nm to 780 nm.

### Claim 3 (depends on 1)

The spectacle lens according to claim 1,
wherein an antireflection film having an average reflectivity of 1.5% or less over a wavelength range of 380 nm to 780 nm is disposed on the concave surface of the plastic base.

### Claim 4 (depends on 1)

The spectacle lens according to claim 1,
wherein the average reflectivity of the multilayer film disposed on the convex surface of the plastic base over a wavelength range of 400 nm to 500 nm is greater than the average reflectivity of the multilayer film disposed on the concave surface of the plastic base over a wavelength range of 400 nm to 500 nm.

### Claim 5 (depends on 4)

The spectacle lens according to claim 4,
wherein the average reflectivity of the multilayer film disposed on the convex surface of the plastic base over a wavelength range of 400 nm to 500 nm is 5% to 10%, and the average reflectivity of the multilayer film disposed on the concave surface of the plastic base over a wavelength range of 400 nm to 500 nm is 2% to 4%.

### Claim 6 (depends on 1)

The spectacle lens according to claim 1,
wherein the plastic base is colored and its transmissivity is 5% to 85%.

### Claim 7 (depends on 1)

The spectacle lens according to claim 1, further comprising:
a water-and-oil repellent film including a fluorine-substituted alkyl group-containing organosilicon compound which is provided on the outermost layer of the multilayer film which is most distant from the plastic base.

### Claim 8 (depends on 7)

The spectacle lens according to claim 7,
wherein the fluorine-substituted alkyl group-containing organosilicon compound is at least one or more of the types of fluorine-substituted alkyl group-containing organosilicon compounds selected from among the following general formulas (1) to (6):
(in the formula (1), Rf represents a straight or branched perfluoroalkyl group with 1 to 16 carbon atoms, Y represents iodine or hydrogen, Y′ represents hydrogen or a lower alkyl group with 1 to 5 carbon atoms, Y″ represents fluorine or a trifluoromethyl group, R1 represents a hydrolyzable group, R2 represents hydrogen or an inert monovalent organic group, a, b, c, and d each represents an integer of 0 to 200, e represents 0 or 1, s and t each represents an integer of 0 to 2, and w represents an integer of 1 to 10);
[Chem. 2]
F—(CF2)q—(OC3F6)m—(OC2F4)n—(OCF2)o(CH2)pXX″Si(X′)3-k(R3)k (2)
[Chem. 3]
F—(CF2)q—(OC3F6)m—(OC2F4)n—(OCF2)o(CH2)pXX″(X′)2-k(R3)kSiO(F—(CF2)q—(OC3F6)m—(OC2F4)n—(OCF2)o(CH2)pXX″(X′)1-k(R3)kSiO)zF—(CF2)q—(OC3F6)m—(OC2F4)n—(OCF2)o(CH2)pXX″(X′)2-k(R3)kSi (3)
[Chem. 4]
F—(CF2)q—(OC3F6)m—(OC2F4)n—(OCF2)o(CH2)pX(CH2)rSi(X′)3-k(R3)k (4)
[Chem. 5]
F—(CF2)q—(OC3F6)m—(OC2F4)n—(OCF2)o(CH2)pX(CH2)r, (X′)2-k (R3)kSiO(F—(CF2)q—(OC3F6)m—(OC2F4)n—(OCF2)o(CH2)pX(CH2), (X′)1-k(R3)kSiOzF—(CF2)q—(OC3F6)m—(OC2F4)n—(OCF2)o(CH2)pX(CH2), (X′)2-k(R3)kSi (5)
(in the formulas (2) to (5), X represents oxygen or a divalent organic group, X′represents a hydrolyzable group, X″ represents a divalent organosilicon group, R3 represents a straight or branched alkylene group with 1 to 22 carbon atoms, q represents an integer of 1 to 3, m, n, and o each represents an integer of 0 to 200, p represents 1 or 2, r represents an integer of 2 to 20, k represents an integer of 0 to 2, and z represents an integer of 0 to 10 when k is 0 or 1); and
(in the formula (6), Rf2 represents a divalent straight perfluoropolyether group, R4 represents a phenyl group or an alkyl group with 1 to 4 carbon atoms, R5 represents a hydrolyzable group, i represents an integer of 0 to 2, j represents an integer of 1 to 5, and u represents 2 or 3).

### Claim 9 (depends on 1)

The spectacle lens according to claim 1,
wherein the multilayer film is a multilayer film of four or more layers.

### Claim 10 (depends on 1)

The spectacle lens according to claim 1,
wherein a functional thin film is provided between the plastic base and the multilayer film.

### Claim 11 (depends on 1)

The spectacle lens according to claim 1,
wherein a dielectric film or a metallic film having a thickness of 20 nm or less is provided between a high refractive index material and a low refractive index material constituting the multilayer film.

### Claim 12 (depends on 1)

The spectacle lens according to claim 1,
wherein the high refractive index material includes zirconium dioxide, and the low refractive index material includes silicon dioxide.

### Claim 13

A method of manufacturing a spectacle lens which includes a plastic base which has a convex surface and a concave surface and a multilayer film which is disposed on at least the convex surface of the plastic base, the method comprising the steps of:
heating the plastic base; and
forming the multilayer film on the plastic base after adjusting the temperature of the plastic base to a predetermined temperature by the heating step,
wherein the step of forming the multilayer film has a process of forming a high refractive index layer having a multilayer structure by alternately applying a high refractive index material and a low refractive index material in multilayers, and a process of forming, on the high refractive index layer, a low refractive index layer having a lower refractive index than that of the high refractive index layer, and
wherein an average reflectivity of the multilayer film over a wavelength range of 400 nm to 500 nm is 4.2% to 10% of blue light.

### Claim 14 (depends on 13)

The method of manufacturing the spectacle lens according to claim 13,
wherein a step of forming the multilayer film using a vacuum deposition method is included.

### Claim 15 (depends on 13)

The method of manufacturing the spectacle lens according to claim 13,
wherein the step of forming the multilayer film includes a step of forming at least one of the layers constituting the multilayer film while carrying out ion beam assist.

### Claim 16 (depends on 15)

The method of manufacturing the spectacle lens according to claim 15,
wherein the ion beam assist is performed using at least one type of gas selected from among an inert gas, oxygen gas, and a mixed gas of inert gas and oxygen gas.

### Claim 17 (depends on 16)

The method of manufacturing the spectacle lens according to claim 16,
wherein the inert gas is argon.