OPTICAL AND MECHANICAL SCANNING DEVICE

Assignee

Filed

Dec 9, 1977

Granted

Aug 18, 1987

Location

Abstract

An optical and mechanical scanner including a device for scanning a field of vision to detect and recognize with high resolution distant objects in the field of vision. Scanning is accomplished in two directions including a direction x for line scanning and a direction y for raster or image scanning. One embodiment of the scanning device includes, in order along the direction of a path of a mean incident beam from the field of vision, an objective, a raster scanning mirror for scanning in the y direction, a field mirror which delimits the field of the objective in the x direction, a rotating drum and an image transport system for line scanning in the x direction, the field mirror deflecting the beams towards the drum, and a detector sensitive to the radiation contained in the beams, the scanning device ensuring convergence of the beams at the detector. The scanner also includes a system for direct visualization of the image scanned, and in one embodiment the scanner has scanning and visualization beams using different paths symmetrical with respect to a plane. The direct visualization system includes the drum, another reflecting surface of the scanning mirror, the detector, a second image transport system and a second field mirror which are symmetrical about an axis with respect to the other transport system and field mirror, respectively, a plane mirror, an electroluminescent diode symmetrical about the plane mirror with respect to the detector, and a circuit for feeding signals to the diode corresponding to the field image being scanned.

Source: Google Patents