US3760175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uncooled gallium-aluminum-arsenide laser illuminator
Assignee: United States Department of the Army
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Filing: 1972-09-22
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Granted: 1973-09-18
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Expires: 1992-09-22
Abstract
Abstract A compact room temperature laser illuminator is provided. A cylindrical design allowing both radial and axial power and heat flow is employed. A stepped heat sink provides adequate cooling for close packed diodes. Shape and placement of electronic and optical elements as well as their composition materials are combined to insure unusually high reliability, small size, and low weight.
Inventors
- 👤 S Gibson
- 👤 W Lyttle
- 👤 A Repasy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:02
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02; H01S5/024; H01S5/02469; H01S5/022; H01S5/02208; H01S5/023; H01S5/02325; H01S5/02326; H01S5/40; H01S5/4018; H01S5/04; H01S5/042; H10; H10W; H10W72/00; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W90/00; H10W90/701; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
46 words
A laser illuminator according to claim 1 wherein said electrical driving circuits include means to supply a plurality of pulses in less than one microsecond repeated continuously at a frequency under one kilocycle to increase the effective duty cycle of the illuminator without adverse heating effects.
Claim 2
Dependent Claim
57 words
A laser illuminator according to claim 1 wherein, said array member includes a central bolt-like member of conducting material with a stepped head portion to receive said plurality of light emitting diodes with a threaded stem portion extending through said backing plate; and a finned nut-like member is threadably attached to the external portion of said stem.
Claim 3
Dependent Claim
76 words
A laser illuminator according to claim 3 wherein said bolt-like member further includes, a commutator flange adjacent said stepped head portion; an insulator mounted on said flange; and a plurality of electrically conducting commutator segments mounted on said insulator, each segment being attenuated in cross section as it approaches said head portion and each segment being electrically connected in series between said diodes and said port terminals with its smallest cross-section connected directly to said diodes.
Claim 4
Dependent Claim
107 words
A laser illuminator according to claim 1 wherein said array member includes, a plurality of ports each comprising a stack of triangular shaped conductive mounts stacked in pairs; a diode sandwiched between each pair at the smallest angle of said mounts each stack resting on the circuit at the tip of one of said wedge shaped substrates a conductive pressure plate resting on the opposite and of said stack; conductive fastening means connections said pressure plate to said backing plate; and said optical means includes a separate means for redirecting the radiation from each diode into a single narrow beam along the axis of said cylindrical housing.
Claim 5
Dependent Claim
28 words
A laser illuminator according to claim 5 wherein, said separate means consists of a plurality of optical fibers each cemented to the radiation face of a different diode.
Claim 6
Dependent Claim
35 words
A laser illuminator according to claim 1 wherein, said optical means includes a wave guide integrator mounted on said array member and a lens covering the second of said open ends in said housing member.
Claim 7
Dependent Claim
35 words
A laser illuminator according to claim 4 wherein, said optical means includes a wave guide integrator mounted on said array member and a lens covering the second of said open ends in said housing member.
Claim 8
Dependent Claim
35 words
A laser illuminator according to claim 6 wherein, said optical means includes a wave guide integrator mounted on said array member and a lens covering the second of said open ends in said housing member.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |