Optoelectronic device for rotary scanning of videofrequency images
First Claim
1. An optoelectronic device for scanning videofrequency images comprising optical elements driven in rotation so as to produce an image scan, an optical element for focusing on a detection system comprising at least one array of detectors and videofrequency means for processing the signals delivered by the detectors, wherein the optical elements which are driven in rotation consist of an afocal system comprising at least two cylindrical optical elements driven together in rotation about an axis which is perpendicular to the plane of their generator-lines and defines the optic axis of the device, and wherein the array of detectors comprises a plurality of detectors extending radially from said perpendicular axis, one of said detectors being centered on said axis.
1 Assignment
0 Petitions
Accused Products
Abstract
The optoelectronic rotary scanning device comprises optical receiving means, optical elements driven together in rotation by an afocal system consisting of at least two cylindrical optical elements designed to rotate about an axis perpendicular to the plane of their generator-lines, and an optical element for focusing on an array of detectors extending radially from the perpendicular axis. Videofrequency means are provided for processing the signals delivered by the detectors, the signals being multiplexed and stored sequentially in memory after transcription to cartesian coordinates. The videofrequency processing means also comprise a loop which subtracts the integrated mean value of the signals of all the detectors from each signal of each detector and a circuit for correcting thermal-drift residual voltages of the amplifying circuits of the detectors.
17 Citations
16 Claims
- 1. An optoelectronic device for scanning videofrequency images comprising optical elements driven in rotation so as to produce an image scan, an optical element for focusing on a detection system comprising at least one array of detectors and videofrequency means for processing the signals delivered by the detectors, wherein the optical elements which are driven in rotation consist of an afocal system comprising at least two cylindrical optical elements driven together in rotation about an axis which is perpendicular to the plane of their generator-lines and defines the optic axis of the device, and wherein the array of detectors comprises a plurality of detectors extending radially from said perpendicular axis, one of said detectors being centered on said axis.
Specification