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optical components

A technology of optical components and adjustment parts, applied in the direction of optical components, optics, instruments, etc., can solve problems such as color tone changes, and achieve the effect of reducing the dependence of incident angle

Active Publication Date: 2016-09-07
AGC INC
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  • Claims
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Problems solved by technology

[0003] However, an optical filter with a dielectric multilayer film is dependent on the incident angle of light. When used in an imaging device, since the cutoff wavelength moves with the incident angle of light incident on the filter through the imaging lens, it may be used in imaging. The color tone changes between the center and periphery of the image

Method used

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Embodiment 1）

[0070] On one side surface of a soda glass plate with a thickness of 1mm as the transparent substrate 2, as shown in Tables 1 to 3, TiO as the high refractive index layer 31 2 film and SiO as low refractive index layer 32 2 The films are stacked alternately to form the first dielectric multilayer film 3 . In addition, on the other surface of the transparent substrate 2, as shown in Tables 4 to 6, TiO as the high refractive index layer 41 2 film and SiO as low refractive index layer 42 2 The films are laminated alternately to form the second dielectric multilayer film 4, and the optical component 1 is produced.

[0071] It should be noted that for the first dielectric multilayer film 3, the total number of layers obtained by combining the high refractive index layer 31 and the low refractive index layer 32 is 76, that is, the total number of layers of the unit refractive index layer 33 is 38, satisfying n H d H / n L d L The number of layers 33 with a unit refractive index...

Embodiment 2）

[0105] On one surface of a soda glass plate with a thickness of 1 mm as the transparent substrate 2, as shown in Table 13, TiO as the high refractive index layer 31 2 film and SiO as low refractive index layer 32 2 The films are laminated alternately to form the first dielectric multilayer film 3, and the optical component 1 is produced.

[0106] It should be noted that for the first dielectric multilayer film 3, the total number of layers obtained by combining the high refractive index layer 31 and the low refractive index layer 32 is 30, that is, the total number of layers of the unit refractive index layer 33 is 15, satisfying n H d H / n L d L The number of layers 33 with a unit refractive index ≥3 is 13, satisfying n H d H / n L d L The number of layers 33 with a unit refractive index of ≥5 is 12, satisfying 5≤n H d H / n L d L The number of layers 33 with a unit refractive index of ≤8 is 12, and the average n H d H / n L d L is 5.5, the average optical film t...

Embodiment 3）

[0113] On one surface of the near-infrared cut filter glass (NF-50 glass manufactured by Asahi Glass Co., Ltd., glass thickness: 0.3 mm) as the transparent substrate 2, as shown in Tables 14 to 16, the high refractive index layer 31 TiO 2 film and SiO as low refractive index layer 32 2 The films are stacked alternately to form the first dielectric multilayer film 3 . In addition, on the other side surface of the transparent substrate 2, as shown in Table 17, TiO as the high refractive index layer 41 2 film and SiO as low refractive index layer 42 2 The films are laminated alternately to form the second dielectric multilayer film 4, and the optical component 1 is produced.

[0114] It should be noted that for the first dielectric multilayer film 3, the total number of layers obtained by combining the high refractive index layer 31 and the low refractive index layer 32 is 76, that is, the total number of layers of the unit refractive index layer 33 is 38, satisfying n H d H...

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Abstract

An optical member has: a transparent substrate; and a dielectric multilayer on the transparent substrate formed by stacking a plurality of unit refractive index layers each formed of a high-refractive index layer having a refractive index of 2 or more and a low-refractive index layer having a refractive index of 1.6 or less. In the optical member, a total number of the unit refractive index layers is 15 or more, and a number of the unit refractive index layers satisfying a condition of nHdH / nLdL≧3 is 10 or more, nHdH represents an optical thickness of the high-refractive index layer, and nLdL represents an optical thickness of the low-refractive index layer.

Description

technical field [0001] The present invention relates to optical components having dielectric multilayer films. Background technique [0002] In an imaging device such as a digital camera, a solid-state imaging device such as a CCD (Charge Coupled Device) or a CMOS image sensor (Complementary Metal Oxide Semiconductor Image Sensor) is used to capture a photographed object. These solid-state imaging devices have spectral sensitivity from the visible region to the near-infrared wavelength region near 1100nm. Since good color reproducibility cannot be obtained by a single component, it is corrected to normal human visual sensitivity by using a filter that blocks light in the infrared wavelength region. . That is, an optical filter that blocks light in the infrared wavelength region is provided on the optical path from the imaging lens to the solid-state imaging device. The optical filter used for this purpose requires a high transmittance of light in the visible wavelength reg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/28
CPCG02B5/282G02B5/285G02B5/286
Inventor 大泽光生森雅宏三宅克司上条克司馆村满幸
Owner AGC INC
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