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Diaphragm blade, method of manufacturing the same, and light quantity controller having the same

A technology of light quantity controller and aperture blade, which is applied in aperture, optics, camera, etc., and can solve the problem of equipment enlargement

Active Publication Date: 2008-08-27
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the size of the blade drive such as the motor has to be increased, and as a result, the entire device may become larger

Method used

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  • Diaphragm blade, method of manufacturing the same, and light quantity controller having the same
  • Diaphragm blade, method of manufacturing the same, and light quantity controller having the same
  • Diaphragm blade, method of manufacturing the same, and light quantity controller having the same

Examples

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no. 1 example

[0028] FIG. 1 is an exploded perspective view schematically showing the configuration of a light quantity controller having aperture blades according to a first embodiment of the present invention.

[0029] In FIG. 1 , aperture blades 1 , 2 , 3 , 4 , 5 and 6 are provided. The aperture blade 1 includes: a thin-plate blade base (blade member) 1a, which adjusts a hole of an optical path; a first shaft portion 1b, which is provided on one surface of the blade base 1a to control the movement of the blade base 1a; and a second shaft portion 1c , which is provided on the other surface of the blade base 1a to control the movement of the blade base 1a. Similar to the aperture blade 1 , the aperture blades 2 to 6 respectively include blade base portions 2 a to 6 a , first shaft portions 2 b to 6 b , and second shaft portions 2 c to 6 c (although some of them are not shown). The configuration of the diaphragm blades 2 to 6 is similar to that of the diaphragm blade 1 , and thus descripti...

no. 2 example

[0073] A light quantity controller having the diaphragm blades according to the second embodiment of the present invention will be described. The light quantity controller of the second embodiment differs from that of the first embodiment only in the diaphragm blades. The basic configuration of the light quantity controller of the second embodiment is similar to that of the light quantity controller shown in FIG. 1 , and thus description thereof is omitted.

[0074] Thereafter, the relationship between the blade base portion 101a and the first shaft portion 101b of the aperture blade 101 according to the second embodiment will be described in detail.

[0075] FIG. 6 is a plan view showing aperture blades 101 applied to the configuration in FIG. 1 . FIG. 7 is a partial sectional view showing the aperture blades 101 taken along line VII-VII in FIG. 6 . The relationship between the blade base portion 101a and the first shaft portion 101b will be described below with reference t...

no. 3 example

[0088] A light quantity controller having diaphragm blades according to a third embodiment of the present invention will be described. The light quantity controller of the third embodiment differs from that of the first embodiment only in the aperture blades. The basic configuration of the light quantity controller of the third embodiment is similar to that of the light quantity controller shown in FIG. 1 , and thus description thereof is omitted.

[0089] Thereafter, the relationship between the blade base portion 201a and the first shaft portion 201b of the aperture blade 201 according to the third embodiment will be described in detail.

[0090] FIG. 10 is a plan view showing diaphragm blades 201 applied to the configuration in FIG. 1 . FIG. 11 is a partial sectional view showing the aperture blades 201 taken along line XI-XI in FIG. 10 . The relationship between the blade base portion 201a and the first shaft portion 201b will be described below with reference to FIGS. 1...

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Abstract

A diaphragm blade and manufacturing method thereof as well as a light quantity controller containing the diaphragm. The diaphragm blade includes a light-shielding, thin-plate blade base made of laser absorptive resin to regulate an aperture, and a first shaft portion made of laser transmissive resin and provided on one surface of the blade base. The first shaft portion includes a cylindrical member which is welded to the protruding weld portion, a protruding weld portion integrally formed with the blade base, and a recess formed at the back side of the protruding weld portion. The cylindrical member has a first recess defined at one end thereof near the blade base and coming into contact with the protruding weld portion, and a second recess defined at the other end. A contact surface of the protruding weld portion is melted with laser beam transmitted through the cylindrical member, whereby the protruding weld portion is welded to the cylindrical member.

Description

technical field [0001] The present invention relates to an aperture blade for optical equipment such as a film camera, a camcorder, and a digital camera, a method of manufacturing the aperture blade, and a light quantity controller having the aperture blade. Background technique [0002] Cameras with solid-state imaging elements such as video cameras and digital cameras, and cameras using film generally have an aperture device (light controller) that controls the aperture to check the depth of focus of the lens and to control the focus on the film or solid-state imaging element. The amount of light on the subject. In addition, the optical device that projects an image may have a light quantity controller. Typically, the light quantity controller includes a type that uses a plurality of light-shielding blades (aperture blades) to change the aperture around an optical axis such as an iris, and a type that relatively moves two aperture blades in opposite directions to change t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B9/06G03B9/02B29C65/16B29K67/00B29K69/00
Inventor 青岛力鲶江英利子宫胁诚
Owner CANON KK