US4173036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wavy mirror transmitter optics
Assignee: United States Department of the Navy
•
Filing: 1977-11-21
•
Granted: 1979-10-30
•
Expires: 1997-11-21
Abstract
Abstract A single reflecting transmitter with improved performance capabilities. Themproved performance is achieved by using a modified surface called a wavy mirror. The wavy mirror has its focal distance a function of the angle measured around the axis of revolution. The wavy mirror is designed to reflect light into a predetermined pattern of controlled size and energy distribution. The reflection is oriented so that the light source does not obscure the reflected beam.
Inventors
- 👤 Robert T. Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:46
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
A system for transmitting light beams in a desired intensity distribution pattern comprising: a light source for emitting light, said emitted light in an intensity distribution pattern different from said desired intensity distribution pattern and where said emitted light intensity can be described with reference to two mutually perpendicular axes passing through said light source and where one of said axes is referred to as an azimuthal axis; and a reflecting surface placed in the path of said emitted light from said light source for changing said emitted light intensity distribution into said desired intensity distribution pattern where said reflecting surface has a contour described by the equation; ##EQU4## where ρ=radial coordinate, θ=elevation coordinate, f o =nominal focal distance, A o =nominal amplitude, φ=azimuth angle, φ o =azimuth limit of beam spread, η=number of oscillations per revolution about the azimuth axis, α=angle of rotation, and E=exponential decay rate of the undulations of the surface.
Claim 2
Independent Claim
154 words
A system for transmitting light beams in a desired intensity distribution pattern comprising: a light source for emitting light, said emitted light in an intensity distribution pattern different from said desired intensity distribution pattern and where said emitted light intensity can be described with reference to two mutually perpendicular axes passing through said light source and where one of said axes is referred to as an azimuthal axis; and a reflecting surface placed in the path of said emitted light from said light source for changing said emitted light intensity distribution into said desired intensity distribution pattern where said reflecting surface has a contour described by the equation; ##EQU4## where ρ=radial coordinate, θ=elevation coordinate, f o =nominal focal distance, A o =nominal amplitude, φ=azimuth angle, φ o =azimuth limit of beam spread, η=number of oscillations per revolution about the azimuth axis, α=angle of rotation, and E=exponential decay rate of the undulations of the surface.
Claim 3
Dependent Claim
19 words
A system of transmitting light beams as described in claim 1 where said light source is a laser diode.
Claim 4
Dependent Claim
36 words
A system for transmitting light beams in a desired intensity distribution pattern as described in claim 1 wherein said reflecting surface is contoured for a desired intensity distribution pattern which does not illuminate said light source.
Claim 5
Dependent Claim
29 words
A system for transmitting light beams in a desired intensity distribution pattern as described in claim 2 where said desired intensity distribution pattern is a uniform thin conical fan.
Claim 6
Dependent Claim
29 words
A system for transmitting light beams in a desired intensity distribution pattern as described in claim 1 where said desired intensity distribution pattern is a uniform thin conical fan.
Claim 7
Dependent Claim
29 words
A system for transmitting light beams in a desired intensity distribution pattern as described in claim 3 where said desired intensity distribution pattern is a uniform thin conical fan.
Claim 8
Dependent Claim
19 words
A system of transmitting light beams as described in claim 3 where said light source is a laser diode.
References Cited (Backward Citations)
US1900551A
Cited
US3476930A
Cited
GB1192272A
Cited
US3645606A
Cited
US3518419A
Cited
US3541323A
Cited
GB1233333A
Cited
DE2249572A1
Cited
US3829677A
Cited
US4034217A
Cited
US3972598A
Cited
US4087682A
Cited
US4030816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |