Patent US1417236A successfully refreshed from Google Patents.
US3654475A
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Light sensing device having a polyhedral reflector and a photomultiplier with segmented photocathode
Assignee: Weston Instruments Inc
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Filing: 1970-02-16
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Granted: 1972-04-04
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Expires: 1990-02-16
Abstract
Abstract An illustrative embodiment of the invention combines a light position sensitive photoelectric device with a light beam splitting structure in order to indicate the position of the light source relative to the device''s photocathode. Primary reflecting surfaces are used to split the incoming beam of light and thereby provide improved light transmission properties.
Inventors
- 👤 Henri L Montpas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:07
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/783
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A light sensing device comprising a polyhedron having a plurality of primary reflecting surfaces, a plurality of photo responsive devices optically aligned each with a respective one of said primary reflectors, said plurality of photo responsive devices further comprising a photomultiplier tube having a segmented photocathode, each of said segments being in optical alignment with a respective one of said primary reflecting surfaces and responsive to light rays redirected therefrom.
Claim 2
Dependent Claim
70 words
A light sensing device comprising a polyhedron having a plurality of primary reflecting surfaces, a plurality of photo responsive devices optically aligned each with a respective one of said primary reflectors, said plurality of photo responsive devices further comprising a photomultiplier tube having a segmented photocathode, each of said segments being in optical alignment with a respective one of said primary reflecting surfaces and responsive to light rays redirected therefrom.
Claim 3
Dependent Claim
98 words
A star tracking sensor comprising a field stop having an aperture formed therein, a pyramidal primary reflector having a plurality of reflecting facets within said field stop, the apex of said pyramidal reflector being substantially in optical alignment with said aperture, spherically or plane ground primary reflectors spaced from said pyramidal primary reflector and being in optical alignment each with a respective reflecting facet of said pyramidal reflector, and a photomultiplier tube having a segmented photocathode, each of said photocathode segments being in optical alignment with a respective one of said facets and spherically or plane ground reflectors.
Claim 4
Dependent Claim
98 words
A star tracking sensor comprising a field stop having an aperture formed therein, a pyramidal primary reflector having a plurality of reflecting facets within said field stop, the apex of said pyramidal reflector being substantially in optical alignment with said aperture, spherically or plane ground primary reflectors spaced from said pyramidal primary reflector and being in optical alignment each with a respective reflecting facet of said pyramidal reflector, and a photomultiplier tube having a segmented photocathode, each of said photocathode segments being in optical alignment with a respective one of said facets and spherically or plane ground reflectors.
References Cited (Backward Citations)
US2921757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |