US4818860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light collimating member for photoelectric transfer apparatus
Assignee: Alps Alpine Co Ltd
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Filing: 1987-08-05
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Granted: 1989-04-04
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Expires: 2007-08-05
Abstract
Abstract A light conducting member for use in photoelectric transfer apparatus is disclosed comprising a large number of optical fibers bundled into an integral body, wherein each optical fiber is constituted of a transparent core and a light absorbing clad covering over the periphery of the core, and wherein the core and the clad have indexes of refraction virtually equal to each other.
Inventors
- 👤 Kazuo Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:37
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10712; G06K7/10762; G02; G02B; G02B6/00; G02B6/04; G02B6/06; G02B6/08; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/042; G06F3/0421
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A light conducting member in combination with a photodetector device capable of conversion between light and an electrical signal, said light conducting member being disposed in front of said photodetector device and comprising a large number of optical fibers bundled into an integral body wherein each optical fiber is constituted of a transparent core and a light absorbing clad covering over the periphery of said core, and wherein said core and said clad have indexes of refraction virtually equal to each other.
Claim 2
Dependent Claim
82 words
A light conducting member in combination with a photodetector device capable of conversion between light and an electrical signal, said light conducting member being disposed in front of said photodetector device and comprising a large number of optical fibers bundled into an integral body wherein each optical fiber is constituted of a transparent core and a light absorbing clad covering over the periphery of said core, and wherein said core and said clad have indexes of refraction virtually equal to each other.
Claim 3
Dependent Claim
28 words
A light conducting member for photoelectric transfer apparatus according to claim 1, wherein the end faces of said core and said clad are provided with highly smooth finishing.
Claim 4
Dependent Claim
27 words
A light conducting member for photoelectric transfer apparatus according to claim 1, wherein the end face of said light conducting member is finished in a curved surface.
Claim 5
Dependent Claim
78 words
A light conducting member in combination with a light emitting device, said light conducting member comprising a large number of optical fibers bundled into an integral body wherein each optical fiber is constituted of a transparent core and a light absorbing clad covering over the periphery of said core, and wherein said core and said clad have indexes of refraction virtually equal to each other, said light conducting member being disposed in front of said light emitting device.
Claim 6
Dependent Claim
78 words
A light conducting member in combination with a light emitting device, said light conducting member comprising a large number of optical fibers bundled into an integral body wherein each optical fiber is constituted of a transparent core and a light absorbing clad covering over the periphery of said core, and wherein said core and said clad have indexes of refraction virtually equal to each other, said light conducting member being disposed in front of said light emitting device.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |