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Light-blocking member for optical instrument

A technology of optical equipment and components, which is applied in the field of light-shielding parts, can solve the problems of light-shielding and sliding properties that cannot be fully exerted, and achieve the effect of excellent matting properties

Active Publication Date: 2009-06-10
KIMOTO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in such a light-shielding film, in order to impart matt properties to the light-shielding film, a large amount of fine particles had to be contained, and the content of carbon black and lubricant in the light-shielding film decreased, resulting in the occurrence of light-shielding properties and sliding properties. unfulfilled problems

Method used

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  • Light-blocking member for optical instrument
  • Light-blocking member for optical instrument

Examples

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Effect test

Embodiment 1、2 and comparative example 1～6

[0049] A black polyethylene terephthalate film (Lumila-X30: Toray Co., Ltd.) with a thickness of 50 μm was used as a base material, and the coating liquid for a light-shielding film of the following treatment method was applied to both sides by the coating method ( In a) to (h), the coatings were applied so as to have a thickness of 10 μm when dried, and were dried to form light-shielding films A to H, thereby producing light-shielding members for optical devices of Examples 1 and 2 and Comparative Examples 1-6. In addition, the content (part) of the acrylic polyol etc. of the coating liquid for light-shielding films (a)-(h) of the following handling method is shown in Table 1. In addition, the content rate (%) of the acrylic polyhydric alcohol etc. of the formed light-shielding films A-H is shown in Table 2.

[0050]

[0051] ・Acrylic polyol (solid content 50%) (parts described in Table 1)

[0052] (acridi ツ クA804: Dainippon Inki Chemical Industry Co., Ltd.)

[0053] ・Is...

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PUM

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Abstract

Disclosed is a light-blocking member for optical instruments which has delustering properties while maintaining physical properties of a light-blocking film such as light-shielding properties and sliding properties. Specifically disclosed is a light-blocking member (1) for optical instruments which is composed of a base (2) made of a synthetic resin film, and a light-blocking film (3) formed on at least one side of the base (2). The light-blocking film (3) contains a binder resin and carbon black (31), a particulate lubricant (32), and specific fine particles (33). The specific fine particles (33) are organic or inorganic fine particles having an oil absorption of 250(g / 100g), and silica is particularly preferably used for such specific fine particles.

Description

technical field [0001] The present invention relates to a light shielding member suitable for use as a shutter and aperture member of optical equipment such as a high-performance monocular reflex camera, a compact camera, a video camera, a mobile phone, and a projector. Background technique [0002] In recent years, due to the demand for miniaturization and weight reduction of high-performance monocular reflex cameras, compact cameras, and video cameras, the shutter and aperture parts of optical devices formed of metal materials have gradually been converted to plastic materials. [0003] As such a plastic diaphragm, there is known a light-shielding film in which a base film is provided with a light-shielding film containing carbon black, a lubricant, and fine particles (Patent Document 1). [0004] [Patent Document 1] JP-A-9-274218 [0005] However, in such a light-shielding film, in order to impart matt properties to the light-shielding film, a large amount of fine partic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/00G03B9/00G02B5/02
CPCG02B5/003B32B7/00G02B5/22G03B9/00
Inventor 加藤孝昭
Owner KIMOTO CO LTD
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