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US3781550A Expired / Lapsed US ⏱️ 0.0 years remaining

Receiver for laser beams

Assignee: Siemens AG
•
Filing: 1972-06-14
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Granted: 1973-12-25
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Expires: 1992-06-14
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Abstract

Abstract A receiver for receiving laser beams preferably from a laser transmitter of a distance measuring device characterized in that at least a semiconductor photo diode, an amplifying laser, and an optical coupling unit are integrally formed on a carrier member to minimize misalignment therebetween during handling and transporting of the receiver. Preferably, the active material such as neodymium has a high index of refraction and is surrounded by material of a low index of refraction to form a wave conductor which preferably has a serpentine configuration to conduct the received laser beam and amplify it prior to projecting it on a silicon or germanium photo diode. In one embodiment of the invention, the current supply unit for the photo diode, the unit for amplifying the output current of the photo diode, and the power supply unit for the laser are integrally formed on the carrier unit along with the photo diode, the amplifying laser and optical coupler.

Inventors

  • 👤 G Zeidler

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 12:49
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/48; G01S7/483; G01S7/486; G01S7/481; G01S7/4816; H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 34 words
In a receiver according to claim 1, wherein the active material of the pre-amplifying laser is the same as the active material of the laser producing the laser beam being received by the receiver.
Claim 2
Dependent Claim 15 words
In a receiver according to claim 1, wherein the pre-amplifying laser is a neodymium laser.
Claim 3
Dependent Claim 29 words
In a receiver according to claim 1, wherein the semiconductor photo diode is an avalanche photo diode of a semiconductor material selected from a group comprising germanium and silicon.
Claim 4
Dependent Claim 24 words
In a receiver according to claim 1, wherein the active surface of the semiconductor photo diode is in direct contact with the preamplifying laser.
Claim 5
Dependent Claim 45 words
In a receiver according to claim 1, which includes the current supply unit for the photo diode, an amplifying unit for the photo diode current, and the power supply for the laser being disposed on the carrier member with each unit being integrally formed thereon.
Claim 6
Dependent Claim 69 words
In a receiver according to claim 1, wherein the active material of the pre-amplifying laser forms a part of a dielectric wave conductor having a serpentine configuration and a small cross-section, said active material having a high index of refraction and being surrounded by a material of a low index of refraction which material of low index of refraction is affixed as a thin layer on said carrier member.
Claim 7
Dependent Claim 63 words
In a receiver according to claim 1, wherein the active material of the pre-amplifying laser forms part of a dielectric wave conductor which is effective for the wave length of the laser beam being received by the receiver, said wave conductor consisting of a material having a high index of refraction, and being surrounded by a material having a low index of refraction.
Claim 8
Dependent Claim 26 words
In a receiver according to claim 8, wherein the material having a low index of refraction is affixed to the carrier member as a thin layer.
Claim 9
Dependent Claim 15 words
In a receiver according to claim 8, wherein the wave conductor has a serpentine configuration.
Claim 10
Dependent Claim 29 words
In a receiver according to claim 1, which further includes a layer of immersion material disposed between the active surface of the semiconductor photo diode and the pre-amplifying laser.
Claim 11
Dependent Claim 15 words
In a receiver according to claim 11, wherein said immersion material is a plastic material.
Claim 12
Dependent Claim 15 words
In a receiver according to claim 11, wherein said immersion material is a liquid material.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-12-24 1977-06-25 1977-12-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-12-24 1981-06-25 1981-12-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-12-24 1985-06-25 1985-12-25 $7700.00 Window Closed / Lapsed

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