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 Title: |
US4380791:
Electrically controlled additive lamp housing for optical printing
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Nishizawa, Masayuki; Koshigaya, Japan
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| Assignee: |
Hoei Sangyo Kabushiki Kaisha Japan
other patents from HOEI SANGYO KABUSHIKI KAISHA (254285) (approx. 1)
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| Published / Filed: |
1983-04-19
/ 1981-05-26
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| Application Number: |
US1981000267413
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| IPC Code: |
Advanced:
G03B 27/54;
G03B 27/73;
Core:
more...
IPC-7:
F21V 5/04;
F21V 7/04;
F21V 9/08;
F21V 13/12;
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| ECLA Code: |
G03B27/54E1; G03B27/73;
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| U.S. Class: |
Current:
362/231;
362/230;
362/268;
362/293;
362/551;
Original:
362/231;
362/032;
362/230;
362/268;
362/293;
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| Field of Search: |
362/032,230,231,268,293
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| Priority Number: |
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| Abstract: |
First, second and third dichroic filters are positioned at corresponding ones of first, second and third light sources for deriving red, green and blue beams, respectively, from the light sources. A beam guide member has first, second and third branched bundles and a main bundle composed of the first, second and third branched bundles. Each branched bundle has an end surface at which a corresponding one of the beams derived from the dichroic filters is provided. The main bundle has an end surface for emitting the beams. A light quantity control circuit controls the quantities of light of the light sources.
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| Attorney, Agent or Firm: |
Steinberg & Raskin ;
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| Primary / Asst. Examiners: |
Gluck, Irwin;
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
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First Claim:
Show all 9 claims |
What is claimed is:
1. An electrically controlled additive lamp housing for optical printing, said lamp housing comprising
- first, second and third light sources;
- first, second and third dichroic filters positioned at corresponding ones of the first, second and third light sources for deriving red, green and blue beams, respectively, from said light sources;
- a beam guide member having first, second and third branched bundles and a main bundle composed of said first, second and third branched bundles, each branched bundle having an end surface at which a corresponding one of said beams derived from said dichroic filters is provided, and said main bundle having an end surface for emitting said beams; and
- a light quantity control circuit for controlling the quantities of light of said light sources.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 15 U.S. patent(s) that reference this one
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