glasses lens

A spectacle lens and plastic lens technology, which is applied in glasses/safety glasses, glasses/goggles, instruments, etc., and can solve the problems of reduced transmittance and large reduction in visual transmittance

Active Publication Date: 2020-02-28
NIKON ESSILOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the spectacle lens disclosed in Patent Document 2, the transmittance of the main absorption peak wavelength between 565 nm and 605 nm is greatly reduced, and the visual transmittance Y is also 14.1% to 73.4% in the examples disclosed in the examples. The rate of reduction is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0165] exist figure 1 On both sides of the urethane-based synthetic resin substrate shown as the plastic substrate 2 (the surface (front side: outer side) and back side (face side) of the spectacle lens 1), a primer with a refractive index of 1.67 is formed by heating and curing. layer and a silicon-based hard coat layer with a refractive index of 1.67, perform pretreatment to form a functional thin film 4 composed of an undercoat layer 5 and a hard coat layer 6, and then, as shown below, deposit The optical multilayer films 3a and 3b were formed to produce the spectacle lens 1 of Example 1.

[0166] Back: The urethane-based synthetic resin substrate (hereinafter referred to as the plastic substrate 2) is placed on the rotating dome provided in the vacuum tank, the temperature in the vacuum tank is heated to 70 degrees, and exhaust is performed until The pressure becomes 1.0×10 - 3 Up to Pa, after Ar ion beam cleaning was performed for 60 seconds under the conditions of ac...

Embodiment 2

[0176] After performing pretreatment on both surfaces of the plastic substrate 2 in the same manner as in Example 1, as shown below, the optical multilayer films 3a and 3b were formed by vacuum evaporation to produce the spectacle lens 1 of Example 2. .

[0177] Front side: Using the same device as in Example 1, under the same processing atmosphere, the first layer with an optical film thickness of 0.250λ is sequentially laminated on the front side of the pretreated plastic substrate 2 by vacuum evaporation method from the front side. SiO 2 (Refractive index 1.47), second layer ZrO with optical thickness 0.040λ 2 (Refractive index 2.00), 3rd layer SiO with optical film thickness 0.060λ 2 (Refractive index 1.47), 4th layer ZrO with optical thickness 0.550λ 2 (Refractive index 2.00), 5th layer SiO with optical film thickness 0.250λ 2 (refractive index 1.47), an optical multilayer film 3a was formed.

[0178] Backside: using the same device as in Example 1, under the same pr...

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Abstract

Provided is a spectacle lens (1) comprising one multilayer film (3a, 3b) on each surface of a plastic lens base material (2), wherein by setting an average reflection rate in at least the 530-570 nm wavelength range to 2.5-5.5% in at least one of the multilayer films (3a, 3b) disposed on a surface of the plastic lens base material, it is possible to attain, in dim environments, an improvement in vividness and brightness in visibility of objects, particularly those that are red in color, as well as an improvement in visibility of the white in white computer screens and the like, and the lens is thereby suitable for the eyes of elderly people.

Description

technical field [0001] The present invention relates to a spectacle lens provided with a multilayer film on both surfaces of a plastic lens. Background technique [0002] In recent years, plastic lenses are often used as eyeglass lenses due to the advantages of light weight, excellent impact resistance, and easy staining. [0003] For the purpose of cosmetic effect, eye protection, light-shielding effect, etc., the entire plastic lens for eyeglasses is uniformly dyed in a desired color or dyed in a concentration gradient (gray scale). [0004] In addition, in recent years, spectacle lenses to which certain functions are imparted by dyeing in addition to cosmetic effects have also been proposed (see Patent Documents 1 and 2), and are widely sold. [0005] In particular, spectacle lenses that effectively cut blue light (380 nm to 500 nm), which has high energy in visible light, are mainstream in order to provide effects such as improving contrast and reducing eye fatigue. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/10G02B1/115G02B5/28
CPCG02B1/116G02C7/104G02C7/107G02B1/115G02B5/28G02C7/10G02B1/041G02B5/285G02C7/108G02C2202/16
Inventor 宫本聪
Owner NIKON ESSILOR
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