US4421386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stress-free window for laser applications
Assignee: Honeywell Inc
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Filing: 1982-03-03
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Granted: 1983-12-20
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Expires: 2002-03-03
Abstract
Abstract A stress-free optic element or window for use in equipment such as lasers. In this window a plurality of circular or curved grooves are formed in the window surface to prevent stresses from reaching the central region of the window used for light beam transmission. The plurality of grooves effectively form a resilient or spring like zone between the periphery of the window and the central region so that stresses generated in the peripheral mounting area are isolated from reaching the central stress-free area.
Inventors
- 👤 Theodore J. Podgorski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:28
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/034; G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3066
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
A stress-free optical element for laser applications comprising: a unitary disc-like transparent optical element having both a relatively stress-free central area for transmission of a light beam as well as a surrounding mounting area near the periphery; a plurality of concentric grooves formed in the element surface on one side of the element; and, at least one further concentric groove formed in the element surface on the opposite side of the element and of radius different from the intermediate said plurality of concentric grooves, said grooves forming a spring-like portion in said unitary optical element to effectually mechanically decouple said stress-free central area from said surrounding area.
Claim 2
Dependent Claim
107 words
A stress-free optical element for laser applications comprising: a unitary disc-like transparent optical element having both a relatively stress-free central area for transmission of a light beam as well as a surrounding mounting area near the periphery; a plurality of concentric grooves formed in the element surface on one side of the element; and, at least one further concentric groove formed in the element surface on the opposite side of the element and of radius different from the intermediate said plurality of concentric grooves, said grooves forming a spring-like portion in said unitary optical element to effectually mechanically decouple said stress-free central area from said surrounding area.
Claim 3
Dependent Claim
26 words
The optical element according to claim 1 wherein the depth of the grooves is at least one half the thickness of the disc like optical element.
References Cited (Backward Citations)
US3420603A
Cited
US3555450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |