Patent US3749475A successfully refreshed from Google Patents.
US3749475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coherent optical device utilizing an organic dye cell to destroy the coherence of a wave energy signal
Assignee: Bendix Corp
•
Filing: 1972-07-21
•
Granted: 1973-07-31
•
Expires: 1992-07-21
Abstract
Abstract An image correlator in which a beam of laser light is projected through two aligned, partially transparent images, and in which the intensity of the beam downstream from the two images is measured to determine image correlation is described herein. A thin organic dye cell is disposed between the two images to destroy the coherency of the laser beam and thereby decrease the effect that slight variations in image alignment will have on correlation measurements. The organic dye cell destroys beam coherence very effectively, is inexpensive, convenient to use, and is also inherently faster than a rotating ground glass element which is used in prior art correlators to destroy beam coherence.
Inventors
- 👤 D Shupe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:10
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/32; G02; G02B; G02B27/00; G02B27/42; G02B27/46; G06; G06E; G06E3/00; G06E3/001
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
In an optical system including means for generating a coherent wave energy signal and requiring the conversion of said coherent signal to an incoherent signal, improved means for providing said conversion comprising: an organic dye material responsive to said coherent wave energy signal disposed to receive and absorb said coherent wave energy signal, said absorption destroying the coherence of said coherent signal and causing said dye material to emit an incoherent wave energy signal having an intensity distribution proportional to the intensity distribution of said coherent wave energy signal.
Claim 2
Dependent Claim
89 words
In an optical system including means for generating a coherent wave energy signal and requiring the conversion of said coherent signal to an incoherent signal, improved means for providing said conversion comprising: an organic dye material responsive to said coherent wave energy signal disposed to receive and absorb said coherent wave energy signal, said absorption destroying the coherence of said coherent signal and causing said dye material to emit an incoherent wave energy signal having an intensity distribution proportional to the intensity distribution of said coherent wave energy signal.
Claim 3
Dependent Claim
22 words
The optical system of claim 1 in which said organic dye material comprises an organic dye solution held in a transparent container.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |