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US 3,946,433 AGranted
Phase image scanning method
AssigneeXerox Corporation
InventorDorian Kermisch
Life of this patent
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Abstract
A method of scanning a phase image and rapidly converting it into a video signal is disclosed. The phase image is scanned with collimated light such as from a laser and the diffracted light is detected by fixed detectors and converted into a video signal. In a preferred embodiment, multiple color encoded phase images of a full color original are simultaneously scanned, converted into video signals and electronically manipulated to effect real-time full color masking of the original.
Claims42
A method of scanning a phase modulated image comprising the steps of:
- a. providing a phase modulated image;
- b. providing a lens means on-axis with the phase image one focal length thereof away from the phase image;
- c. providing a deflector means on-axis with said lens means and the phase image, also one focal length away from said lens means, but on the opposite side thereof from the phase image, said deflector means pivotally and movably mounted to provide a scan path of the surface of the phase image;
- d. directing a beam of collimated light from an off-axis location onto said deflector means whereby as the deflector means controls the scan path, the focused beam light illuminates the phase image.
1 more element
Dependencies are inferred from the claim text.