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US4674828A
Expired / Lapsed
US
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Light-conductive circuit unit including light deflecting means and optical switching means
Assignee: Honda Motor Co Ltd
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Filing: 1985-09-18
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Granted: 1987-06-23
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Expires: 2005-09-18
Abstract
Abstract A light-conductive circuit unit comprises a substrate (1) made of an optical material, the substrate (1) having a light inlet surface (1a) for letting in a beam of light from a light source (2a to 2c), a light outlet surface (1b) for letting out a beam of light to a light-receiving element (3a to 3g), and a light-conductive path (4a to 4h) constituted with a part of the substrate to conduct rays of light from the light inlet surface (1a) to the light outlet surface (1b), and a combination of light course turning parts (5a to 5g) and optical switching mechanisms (6a to 6e) both substantially integrated with the substrate (1).
Inventors
- 👤 Fumitaka Takahashi
- 👤 Yoshihiko Kimura
- 👤 Hideo Tsubata
- 👤 Nobuaki Oji
- 👤 Minoru Mohri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:24
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/35; G02B6/3596; G02B6/10; G02B6/12; G02B6/12004; G02B6/351; G02B6/3512; G02B6/3522; G02B6/3524; G02B6/3528
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
A light-conductive circuit unit (100, 200) comprising: a substrate (1; 201) made of an optical material; said substrate (1; 201) having a light inlet surface (1a) for letting in a beam of light from a light source (2a to 2c), a light outlet surface (1b) for letting out a beam of light to a light-receiving element (3a to 3g), and a light-conductive path (4a to 4h) constituted with an internal part of said substrate (1; 201) to conduct rays of light from said light inlet surface (1a) to said light outlet surface (1b); light deflecting means and optical switching means each respectively disposed in said light conductive path; and said light deflecting means comprising a slit formed in said substrate.
Claim 2
Dependent Claim
120 words
A light-conductive circuit unit (100, 200) comprising: a substrate (1; 201) made of an optical material; said substrate (1; 201) having a light inlet surface (1a) for letting in a beam of light from a light source (2a to 2c), a light outlet surface (1b) for letting out a beam of light to a light-receiving element (3a to 3g), and a light-conductive path (4a to 4h) constituted with an internal part of said substrate (1; 201) to conduct rays of light from said light inlet surface (1a) to said light outlet surface (1b); light deflecting means and optical switching means each respectively disposed in said light conductive path; and said light deflecting means comprising a slit formed in said substrate.
Claim 3
Dependent Claim
74 words
A light-conductive circuit unit according to claim 1, wherein: said optical switching means comprises a prism member (8) fitted in said light-conductive path (4a to 4h) of said substrate (1) in a selectively movable manner relative thereto such that a light direction holding portion (8b) of said prism member and a light direction turning portion (8a) of said prism member are selectively positionable in said light-conductive path (4a to 4h) of said substrate (1).
Claim 4
Dependent Claim
49 words
A light-conductive circuit unit according to claim 2, wherein: said light conductive path (4a to 4h) includes a plurality of branched parts; and said optical switching means is used to selectively transmit said rays of light through one of said branched parts of said light-conductive path (4a to 4h).
Claim 5
Dependent Claim
25 words
A light-conductive circuit unit according to claim 1, further comprising: a guide slit (5h, 5i) formed, in said substrate (1), alongside said light-conductive path (4d').
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |