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Light intensity control device, imaging device and light intensity control method
US8934031B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8934031-B2 |
| Application number | US-201013318026-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 28, 2010 |
| Priority date | Apr 30, 2009 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A light intensity control device includes a fixed opening 261 , an aperture stop part 26 for controlling a light flux of incident light, a light intensity aperture part 24 for changing the size of an opening by moving a plurality of aperture blades to limit a light intensity of transmitted light and a ND filter 25 having a transparent area 253 and a light blocking area 254 , which is arranged to be movable between a first light blocking state where the transparent area 253 faces the fixed opening 261 of the aperture stop part 26 and a second light blocking state where the light blocking area 254 faces the fixed opening. The moving of the ND filter 25 is carried out when the opening area of the light intensity aperture part 24 is a maximum.
First claim
Opening claim text (preview).
What is claimed is: 1. A light intensity control device comprising: an aperture stop part provided with an opening part having a of first opening area thereby controlling flux of incident light to a predetermined size; a light extinction part having a first area whose transmissivity for the incident light is more than a first value and a second area whose transmissivity for the incident light is a second value smaller than the first value, the light extinction part being adapted…
Assignees
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Electricity · mapped topic
Electricity · mapped topic
- G03B9/02Primary
Physics · mapped topic
Electricity · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8934031B2 cover?
- A light intensity control device includes a fixed opening 261 , an aperture stop part 26 for controlling a light flux of incident light, a light intensity aperture part 24 for changing the size of an opening by moving a plurality of aperture blades to limit a light intensity of transmitted light and a ND filter 25 having a transparent area 253 and a light blocking area 254 , which is …
- Who is the assignee on this patent?
- Nidaira Fumio, Nakaaki Yasufumi, Jvc Kenwood Corp
- What technology area does this patent fall under?
- Primary CPC classification G03B9/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).