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Light quantity regulating device, its manufacture method, and photographic device

A technology for adjusting the amount of light and light beams, which is applied in the fields of optical filters, optics, and optical filters for photography, and can solve the problems of increased manufacturing cost of optical filters, large-scale devices, and high prices.

Inactive Publication Date: 2008-05-28
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method uses photolithography or vapor deposition to form a film with a predetermined concentration. No matter which process is used, the device will be enlarged and expensive, and the cost of manufacturing the filter will increase.

Method used

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  • Light quantity regulating device, its manufacture method, and photographic device
  • Light quantity regulating device, its manufacture method, and photographic device
  • Light quantity regulating device, its manufacture method, and photographic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] An aqueous solution composed of 10 parts of polyvinyl alcohol (GOSENOL (ゴ-セノ-ル) GM-14L manufactured by Nippon Synthetic Chemical Co., Ltd.) was prepared in terms of solid content. The obtained coating solution was coated on a polyethylene terephthalate film having a diameter of 5 mm as a transparent substrate with a wire bar, and dried in a hot air drying oven at 100° C. for 5 minutes. The thickness of the layer capable of absorbing and maintaining the coloring liquid thus produced was 7 µm.

[0077] Then, in the ink cartridge of the Bubble Jet (bubble jet) (registered trademark) type inkjet printer using an electrothermal converter as an energy generating element: BJS600 manufactured by Canon Co., Ltd., the colored ink cartridge composed of the following components is filled. The liquid is given to the layer capable of absorbing and holding the coloring liquid made in the above-mentioned manner. At this time, the layer was imparted so as to have a uniform density with...

Embodiment 2

[0089] First, an aqueous solution consisting of 10 parts of polyvinylpyrrolidone (K-30 manufactured by Tokyo Chemical Industry Co., Ltd.) was prepared in terms of solid content. The obtained coating solution was applied onto a polyethylene terephthalate film as a transparent substrate with a metal bar, and dried in a hot air drying oven at 120° C. for 10 minutes. The thickness of the layer capable of absorbing and holding the coloring liquid (hereinafter referred to as holding layer) thus produced was 10 µm.

[0090] Then, in the ink cartridge of the BubbleJet (bubble inkjet) (registered trademark) type inkjet printer using an electrothermal converter as an energy generating element: Canon Co., Ltd. BJS600, fill the coloring liquid composed of the following components . Then, a coloring liquid was applied at a uniform density of optical density 0.5 (transmittance 32%) on the holding layer produced as described above using the inkjet printer.

[0091] ・Black Dye Food Dye Blac...

Embodiment 3

[0100] A light amount adjusting member was produced in the same manner as in Example 1. However, when applying the coloring liquid, the coloring liquid is not uniformly applied on the entire surface of the transparent substrate, but a step-like concentration gradient is applied, and the colored part becomes as follows: Figure 4 A pattern of light and dark gradations as shown. For the light quantity adjusting member of this example produced in this way, the contrast value was obtained and evaluated in the same manner as the light quantity adjusting member obtained in Example 1. As a result, the contrast value was 0.93, which is a high-performance product.

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Abstract

A production process of a light amount adjustment member, by which a light amount adjustment member that can sufficiently satisfy optical properties can be economically produced at low production cost and high yield by a simple operation is provided. In addition, a wide variety of light amount adjustment devices and photographing apparatus equipped with a light amount adjustment member are cheaply provided while achieving satisfactory optical properties. The production process of the light amount adjustment member comprises the step of applying a coloring liquid containing a coloring material to a transparent base material using a liquid jet recording process to form a light amount adjustment region having a particular optical density.

Description

technical field [0001] The present invention relates to a manufacturing method that can easily obtain a light quantity adjusting member that can be used in various fields such as digital cameras, television cameras, etc. photographic device. Background technique [0002] In an imaging (photography) optical system used in an optical device such as a camera, a light quantity adjusting device for adjusting the light quantity of an incident light beam, that is, a so-called aperture device, is generally incorporated. In such an aperture device, a plurality of aperture blades form an aperture having a predetermined area, and by adjusting the aperture diameter of the aperture with an adjuster, the amount of light passing through the aperture is adjusted. However, as the opening diameter of the opening decreases, the influence of diffraction generated at the ends of the diaphragm blades increases, and the imaging performance of the imaging optical system decreases. In order to avo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/20G03B11/00B41J2/00B41M3/00B41M7/00C09D11/00C09D11/10G02B5/24
CPCG02B5/205C09D11/30B41M3/006B41M7/0054C09D11/101B41M7/0045G02B5/24
Inventor 宫崎健大贯一朗八岛正孝柏崎昭夫鲶江英利子
Owner CANON KK
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