Patent US5518680A successfully refreshed from Google Patents.
US4097749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fourier power spectra of optical images using CCD's
Assignee: United States Department of the Navy
•
Filing: 1977-01-06
•
Granted: 1978-06-27
•
Expires: 1997-01-06
Abstract
Abstract Direct spatial Fourier power spectra of optical images are obtained by maulating either the image focused onto a photosensitive charge coupled device (CCD) or the readout from the CCD.
Inventors
- 👤 Keith L. Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:30
CPC Classifications
G; G06; G06E; G06E3/00; G06E3/001
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A direct optical Fourier analysis system comprising: a focusing device for producing an optical image of an optical input along an optical axis, an electro-optical modulation device following the focusing device on the optical axis for varying the input signal at variable controllable intervals; a two-dimensional charge coupled device following the modulating device along the same optical axis with a multiplicity of photo sensitive elements included therein a clock driver for scanning the charge coupled device as a means for detecting and processing the modulated signal and producing a Fourier power spectra output.
Claim 2
Dependent Claim
93 words
A direct optical Fourier analysis system comprising: a focusing device for producing an optical image of an optical input along an optical axis, an electro-optical modulation device following the focusing device on the optical axis for varying the input signal at variable controllable intervals; a two-dimensional charge coupled device following the modulating device along the same optical axis with a multiplicity of photo sensitive elements included therein a clock driver for scanning the charge coupled device as a means for detecting and processing the modulated signal and producing a Fourier power spectra output.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1 wherein; said modulation device is a Pockels cell.
Claim 4
Dependent Claim
22 words
The apparatus of claim 1 wherein; said photo sensitive elements are arranged in a two-dimensional rectangular array on a charged coupled device.
Claim 5
Dependent Claim
32 words
The apparatus of claim 1 wherein; said charge coupled device is capable of scanning in several directions so that a two-dimensional Fourier power spectra is obtained as the output from said device.
Claim 6
Independent Claim
79 words
A method for producing a Fourier power spectra as output from an optical image input, comprising the steps of; focusing the input through a modulator cell so as to fall on a charge coupled device, modulating the input, detecting and storing the input on said charge coupled device; (having a plurality of photo sensitive photo electric storage elements) reading out the stored photo energy at a variable rate, conducting a signal carried by said photo energy to said output.
Claim 7
Independent Claim
79 words
A method for producing a Fourier power spectra as output from an optical image input, comprising the steps of; focusing the input through a modulator cell so as to fall on a charge coupled device, modulating the input, detecting and storing the input on said charge coupled device; (having a plurality of photo sensitive photo electric storage elements) reading out the stored photo energy at a variable rate, conducting a signal carried by said photo energy to said output.
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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |