Patent US3792370A successfully refreshed from Google Patents.
US3792370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved optical cavity for a laser
Assignee: Individual
•
Filing: 1972-08-11
•
Granted: 1974-02-12
•
Expires: 1992-08-11
Abstract
Abstract A catoptric lens arrangement which is adapted to use with high power radiant energy, as from a laser, is shown. The entrance mirror of the contemplated lens arrangement has a convex reflective surface so that the radiative flux density at the entrance mirror is less than the radiative flux density in a laser beam. The various mirrors in the contemplated lens arrangement further are arranged so that each such mirror may be conductively cooled with aperture blockage reduced to a minimum or eliminated altogether.
Inventors
- 👤 I Goldstein
- 👤 W Rambauske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:07
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; G; G02; G02B; G02B19/00; G02B19/0004; G02B19/0019; G02B19/0023; G02B19/0033; G02B19/0047; H01S3/005; H01S3/034; H01S3/05; H01S3/08; H01S3/08059; H01S3/09; H01S3/097; H01S3/0975; H01S3/04; H01S3/0401
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
In a laser, the optical cavity therein including at least one partially transmissive reflector and a second reflector disposed along the longitudinal axis of such cavity to define the ends thereof, the improvement comprising: a. a first catoptric lens element disposed between the ends of the optical cavity, the reflecting surface of such element being ogival in shape; and b. a second catoptric lens element concentrically mounted around the first catoptric lens element.
Claim 2
Dependent Claim
73 words
In a laser, the optical cavity therein including at least one partially transmissive reflector and a second reflector disposed along the longitudinal axis of such cavity to define the ends thereof, the improvement comprising: a. a first catoptric lens element disposed between the ends of the optical cavity, the reflecting surface of such element being ogival in shape; and b. a second catoptric lens element concentrically mounted around the first catoptric lens element.
Claim 3
Dependent Claim
89 words
The improvement as in claim 1 wherein: a. the reflecting surface of the first catoptric lens element corresponds to the shape formed by rotating a selected portion of a first parabola about the longitudinal axis of the cavity; and b. the reflecting surface of the second catoptric lens element is concave, corresponding to the shape formed by rotating a selected portion of a second parabola about the longitudinal axis of the cavity, the focal circle of such second parabola being coincident with the focal circle of the first parabola.
References Cited (Backward Citations)
US3363196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |