US3571507A
Expired / Lapsed
US
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Optical apparatus for developing display information signals of frequency multiplex character
Assignee: Zenith Electronics LLC
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Filing: 1968-05-15
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Granted: 1971-03-16
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Expires: 1988-05-15
Abstract
Abstract By plural diffraction of a single beam of monochromatic light, a plurality of beams of such light, each of a different frequency, are caused to follow respectively different paths toward an image defining medium. On traversing the medium, the different beams are differently attenuated in correspondence with variations in contrast or opacity throughout the image. After traversing the medium, the beams are heterodyned with another beam upon a photodetector to produce a plurality of output signals of respective different frequencies and individually having amplitudes proportional to the respective different beam intensities. Those output signals define a video image in a manner such that the various frequency components correspond to spatial position and their respective amplitudes correspond to brightness at each position.
Inventors
- 👤 Adrianus Korpel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:41
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/33
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
Optical apparatus comprising: means for developing a plurality of beam individually of monochromatic light, individually directed along respective different paths and individually having respective different frequencies; selective means disposed in said paths for determining, respectively, the intensity of the light in said different paths; and detection means, including a photodetector disposed in said paths beyond said selective means, responsive to said light for producing a plurality of output signals of respectively different frequencies and individually having an amplitude proportional to the light intensity of its particular one of said different paths.
Claim 2
Dependent Claim
91 words
Optical apparatus comprising: means for developing a plurality of beam individually of monochromatic light, individually directed along respective different paths and individually having respective different frequencies; selective means disposed in said paths for determining, respectively, the intensity of the light in said different paths; and detection means, including a photodetector disposed in said paths beyond said selective means, responsive to said light for producing a plurality of output signals of respectively different frequencies and individually having an amplitude proportional to the light intensity of its particular one of said different paths.
Claim 3
Dependent Claim
15 words
Apparatus as defined in claim 1 in which said plurality of beams are developed simultaneously.
Claim 4
Dependent Claim
22 words
Apparatus as defined in claim 1 in which said different paths are positionally related to define a line at said selective means.
Claim 5
Dependent Claim
38 words
Apparatus as defined in claim 1 in which said developing means includes a source of a beam of single-frequency light together with means for diffracting said single-frequency beam to form said plurality of beams of said different frequencies.
Claim 6
Dependent Claim
31 words
Apparatus as defined in claim 4 which further includes means for simultaneously directing to said photodetector another beam of light having a frequency the same as that of said single-frequency beam.
Claim 7
Dependent Claim
52 words
Apparatus as defined in claim 4 in which said diffracting means comprises: a source of input signals of a plurality of diverse frequencies; and means for propagating across said single-frequency beam, in diffractive interaction therewith a plurality of acoustic wave trains developed individually in response to different ones of said input signals.
Claim 8
Dependent Claim
37 words
Apparatus as defined in claim 6 in which a lens is disposed between said developing means and said selective means for focusing said plurality of beams from the region of said diffractive interaction onto said selective means.
Claim 9
Dependent Claim
59 words
Apparatus as defined in claim 1 in which said selective means is a medium in which an image is defined by means of a plurality of regions having individually different opacity for effecting, respectively, different alterations of the intensity of said light and in which said plurality of beams individually are focused upon respective different ones of said regions.
Claim 10
Dependent Claim
17 words
Apparatus as defined in claim 8 which further includes means for imaging said medium upon said photodetector.
Claim 11
Dependent Claim
35 words
Apparatus as defined in claim 9 in which said beams are focused upon an image line of said medium and including means for effectively scanning said beams in a direction normal to said image line.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |