Patent EP0245712A2 successfully refreshed from Google Patents.
EP0245712A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Semiconductor laser and detector device
Assignee: Individual
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Filing: 1987-04-30
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Granted: —
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Expires: 2007-04-30
Abstract
Abstract A combined semiconductor laser and photodetector with a photodetector (48) arranged to directly monitor light reflected off an object surface from the semiconductor laser (32). A photodetector (48) is mounted in the same plane as the surface of the semiconductor laser (32) which emits light. This plane is substantially perpendicular to the central axis of the cone of light emitted from the semiconductor laser (32). The photodetector (48) and the semiconductor laser (32) are both mounted within a single housing (60) (Fig. 3).
Inventors
- 👤 Wai-Hon Lee
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 12:25
CPC Classifications
G; G02; G02F; G02F2/00; H; H01; H01S; H01S5/00; H01S5/02; H01S5/026; H01S3/00; H01S3/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
A light emission and detection device comprising: a semiconductor laser having a first, forward light-emitting surface; detector means for sensing light mechanically coupled to said semiconductor laser in substantially the same plane as said first surface, said plane being substantially perpendicular to an optical axis of a beam of light emitted from said laser; and a single housing enclosing both said laser and said detector means.
Claim 2
Dependent Claim
66 words
A light emission and detection device comprising: a semiconductor laser having a first, forward light-emitting surface; detector means for sensing light mechanically coupled to said semiconductor laser in substantially the same plane as said first surface, said plane being substantially perpendicular to an optical axis of a beam of light emitted from said laser; and a single housing enclosing both said laser and said detector means.
Claim 3
Dependent Claim
19 words
The device of claim 1 wherein said laser and said detector means are mounted on a common heat sink.
Claim 4
Dependent Claim
17 words
The device of claim 1 wherein said detector means is within five millimeters of said semiconductor laser.
Claim 5
Dependent Claim
33 words
The device of claim 1 wherein said detector means is located below said laser such that a vertical line substantially intersects a center of said laser and a center of said detector means.
Claim 6
Dependent Claim
15 words
The device of claim 1 wherein said detector means comprises at least two independent photodetectors.
Claim 7
Dependent Claim
22 words
The device of claim 1 wherein said detector means comprises four independent photodetectors, each of said photodetectors being in a different quadrant.
Claim 8
Dependent Claim
17 words
The device of claim 1 wherein said detector means comprises a plurality of substantially parallel independent photodetectors.
Claim 9
Dependent Claim
19 words
The device of claim 1 further comprising a second detector means for sensing light located behind said semiconductor laser.
Claim 10
Dependent Claim
39 words
The device of claim 1 further comprising a second detector means for sensing light mechanically coupled to said semiconductor laser substantially in said plane, said first mentioned and second detector means being on opposite sides of said semiconductor laser.
Claim 11
Dependent Claim
24 words
The device of claim 9 further comprising first and second polarizers covering at least a portion of said first and second detector means, respectively.
Claim 12
Dependent Claim
21 words
The device of claim 9 further comprising a second semiconductor laser mechanically coupled to said first-mentioned semiconductor laser within said housing.
Claim 13
Dependent Claim
21 words
The device of claim 1 further comprising a second semiconductor laser mechanically coupled to said first-mentioned semiconductor laser within said housing.
Claim 14
Dependent Claim
90 words
A light emission and detection device comprising: a semiconductor laser having a first, forward light-emitting surface; a heat sink having a top surface supporting said semiconductor laser and a front surface in substantially the same plane as said first surface of said laser; four photodetectors mounted to said front surface of said heat sink, each of said photodetectors being in a different quadrant; detector means for sensing light located behind said semiconductor laser; and a single housing enclosing said laser, said heat sink, said four photodetectors and said detector means.
Claim 15
Dependent Claim
90 words
A light emission and detection device comprising: a semiconductor laser having a first, forward light-emitting surface; a heat sink having a top surface supporting said semiconductor laser and a front surface in substantially the same plane as said first surface of said laser; four photodetectors mounted to said front surface of said heat sink, each of said photodetectors being in a different quadrant; detector means for sensing light located behind said semiconductor laser; and a single housing enclosing said laser, said heat sink, said four photodetectors and said detector means.
References Cited (Backward Citations)
No citation records indexed.
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