FR2477288A1
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Light trap with angular discrimination - has hollow housing with internal diaphragms and coaxial openings with light absorbent coating
Assignee: Individual
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Filing: 1980-03-03
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Granted: —
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Expires: 2000-03-03
Abstract
Abstract The trap receives a light flux from a given direction with a wide selective angular range. It consists of diaphragms which are parallel to each other with coaxial circular openings. These make up a series of cells in a hollow space. The values of the diameters of the openings vary linearly from the diameters of the entry and exit diaphragms. The diaphragms have absorbent coatings on them in the hollow spaces. This eliminates parasitic light rays.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-01 08:46
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/005
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