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Optical device and optical member

A technology of optical components and optical devices, applied in the direction of optical elements, optics, measuring devices, etc., to achieve the effects of high straight-forward transmission, high reflection and scattering, and high sensitivity

Active Publication Date: 2017-09-26
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, infrared light transmission filters usually block visible light, so the filter part is mostly dark colors such as black

Method used

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  • Optical device and optical member
  • Optical device and optical member
  • Optical device and optical member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0051] Embodiments of the present invention will be described with reference to the drawings. figure 1 It is a configuration diagram showing an example of the optical member 10 according to the first embodiment of the present invention. figure 1 The illustrated optical member 10 is used as an infrared light transmission filter that blocks visible light and transmits infrared light in an optical device or the like using infrared light. The optical member 10 transmits infrared light and reflects and scatters visible light, whereby the light-receiving region where visible light is observed is colored in a color other than black when viewed from at least the first side. It should be noted that the observed coloring is not limited to a single color, but also includes combinations of a plurality of colors such as mottled patterns and camouflage patterns. Here, the first side is the incident side or the exiting side of infrared light in the optical member 10 and a predetermined one si...

Embodiment approach 2

[0149] Next, a second embodiment of the present invention will be described with reference to the drawings. Figure 18 It is a configuration diagram showing an example of an optical device according to a second embodiment of the present invention.

[0150] Figure 18 The illustrated optical device 100 has an infrared light emitting unit 2 and / or an infrared light receiving unit 3 inside a housing 4 . Furthermore, in the optical device 100 , the optical member 1 is provided so as to cover the opening provided in the housing 4 . According to such a configuration, infrared light passes through the optical member 1 and is emitted to the outside of the housing 4 .

[0151] The optical device 100 is, for example, a camera device that captures an image using infrared light, a distance sensor that uses infrared light to detect the distance of an object or the presence or absence of a nearby object, a measurement device such as a proximity sensor, and a device that uses infrared ligh...

example 1

[0167] This example uses the figure 2 One embodiment of a diffractive structured optical member 20 is shown. First, a film composed of SiO 2 and Ta 2 o 5 A multilayer film having the structure shown in Table 2 below was constituted. It should be noted that the uppermost layer of SiO 2 The layer is formed as a layer to be a diffractive optical element described later.

[0168] [Table 2]

[0169] Table 2

[0170]

[0171] Figure 19 is a graph showing the transmittance characteristics of the multilayer film of this example. Such as Figure 19 As shown, the multilayer film of this example exhibits low transmittance for light in the visible region, and exhibits high transmittance characteristics for light with a wavelength of 900 nm or longer.

[0172] Next, on the first layer, which is the uppermost layer of the formed multilayer film, a range of ±74° in a certain direction and a range of ±49° in a direction perpendicular to it are formed at a wavelength of 915 nm. ...

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PUM

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Abstract

An optical member according to the present invention and equipped with a reflection / scattering section (11) including a selective reflection section (13) for reflecting visible light (102), for example, and transmitting infrared light (101a), for example, and also including a scattering section (12) for scattering the visible light 102 and provided on at least a first side (visible side) of the selective reflection section, wherein the rectilinear propagation transmittance of the infrared light (101a) is 75% or higher. The scattering section (12) may have a diffraction structure, may be a concavoconvex surface formed on the first-side surface of a reflective member belonging to the selective reflection section (13), or may have a particle-containing resin layer. The reflective member of the selective reflection section (13) may be a dielectric multilayer film or a cholesteric phase liquid crystal layer. Furthermore, the reflection / scattering section (11) may have a cholesteric phase liquid crystal layer having multiple regions with different axes of orientation in one plane.

Description

technical field [0001] The present invention relates to an optical device using infrared light and an optical member used in the optical device. Background technique [0002] Optical devices using infrared light are used in various applications such as measurement, communication, and eco-certification in addition to imaging applications such as infrared camera devices. [0003] Such an optical device generally includes an infrared light emitting unit and / or an infrared light receiving unit. In addition, in this optical device, for the purpose of reducing unnecessary light such as visible light incident on the above-mentioned light-emitting part or light-receiving part, and for the purpose of making the opening of the housing invisible, an infrared light transmission device that only transmits infrared light is sometimes provided. In the filter, the opening of the housing is provided for emitting infrared light from the light emitting unit to the outside or for receiving inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/26G02B5/02G02B5/18G02B5/22G02B5/28
CPCG02B5/0226G02B5/0294G02B5/208G02B5/203G01J2005/0077H01L27/14621H01L27/14649G01J5/0816H04N23/11G02B5/281G01J5/0205H04N5/7441
Inventor 宫坂浩司
Owner ASAHI GLASS CO LTD
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