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| To this effect, the invention has as objective a temperature indicator constituted by a substrate ... |
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| Portable apparatus |
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| Method and device for information processing and program providing medium |
| What is claimed is: 1. An information processing method for estimating a state variable of a target ... |
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| Portable working chute system |
| OF THE INVENTION In FIG. 1 there is shown a top view of a preferred embodiment of portable working ... |
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| Modular flooring system for an animal housing |
| In accordance with the present invention there is provided a modular flooring apparatus for an ... |
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| Alarm or warning device with sensing means in the form of a D.C. biased shielded coaxial cable |
| The object of the present invention is therefore to provide a new alarm device, apt to overcome the ... |
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| System and method for multi-resolution background adaptation |
| Briefly, the present invention is directed to a system and method for background adaptation of ... |
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| System and method for tracking movement of objects in a scene |
| Briefly, the present invention is directed to a system and method for tracking movement of objects, ... |
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Optical scanner and recorder
| Details |
Inventors: Hudson, Kenneth C.; Herzog, Donald G.;
Assignee: RCA Corporation (New York, NY)
Primary Examiner: Hartary; Joseph W.
Assistant Examiner:
Attorney, Agent or Firm: Cohen; Samuel, Olson; Carl V.
A flat field laser recorder includes means to direct a beam from a laser through an acousto-optic light modulator, an acousto-optic light deflector/modulator, and a beam scanner, to scan-lines on a linearly-moving light-sensitive film. The acousto-optic light modulator is operated by electrical oscillations which are amplitude modulated by a video information signal. The acousto-optic light deflector/modulator is operated by electrical oscillations which are amplitude modulated to provide an automatic brightness control of the beam, and are frequency modulated to provide an automatic scan-line spacing control. In addition, a plurality of simultaneous oscillation frequencies are selectively applied to the deflector/modulator to provide beam spot elongation control in the direction perpendicular to the scan-lines. |
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DETAILED DESCRIPTION What is claimed is: 1.
An optical scanner, comprising means in a light beam path including an acoustooptic light deflector/modulator and a deflector to cause a light beam to scan a line on a target, an electrical oscillator having an amplitude modulation input and a frequency modulation input and producing electrical oscillations coupled to said light deflector/modulator, a photo-electric cell positioned to receive a portion of the light in the beam, and having an electrical output coupled to the amplitude modulation input of said light deflector/modulator to effect an automatic brightness control of the beam, an array of photo-electric cells positioned to receive light from the scanned beam, and an electrical circuit responsive to the outputs of the array of photo-electric cells and having an output coupled to the frequency modulation input of the light deflector/modulator to effect an automatic line scan spacing control of the beam.
2.
The combination of claim 1 wherein said oscillator consists of a plurality of oscillators of different frequencies, and includes means to simultaneously couple the plurality of oscillations to said light deflector/modulator to cause a beam spot which is elongated in the direction at right angles to the direction of scan.
3.
The combination of claim 1, and in addition a light beam modulator in the path of said beam, an amplitude modulated oscillator having an output coupled to said light beam modulator, and having a modulation input, a source of a video signals coupled to the modulation input of said oscillator, and means coupling an output of said electrical circuit for said array of photo-electric cells to said source of a video signals to synchronize it with the scan-lines of the beam.
4.
The combination of claim 3 wherein said array of photo-cells includes four photo-cells A, B, C and D arranged in four quadrants and each having an electrical output coupled to said electrical circuit, said photo-cells being positioned so that the termination of signal from A or B and the beginning of signal from C or D initiates a start line synchronizing pulse, and the sum of signals from A and C minus to the sum of the signals from B and D is a line position correction signal
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Telecommunications 
