Rectangular optical wedge array telescope antenna of synthetic aperture laser imaging radar

Abstract

The invention provides a rectangular optical wedge array telescope antenna of synthetic aperture laser imaging radar. The antenna comprises a rectangular optical wedge array, an object lens, an eye lens, a spectroscope, an array of a rectangular aperture photoelectric detector, an array of a rectangular aperture laser transmitter and a reflector in sequence, wherein the rectangular optical wedge array is positioned on the front focal plane of the object lens; the array of the rectangular aperture photoelectric detector is positioned on the back focal plane of the eye lens; the array of the rectangular aperture laser transmitter is positioned on the back focal plane of the eye lens; the spectroscope carries out beam splitting combination on a beam from the array of the rectangular aperture laser transmitter or from the object lens, and a beam entering the array of the rectangular photoelectric detector; the focus of the object lens is f1; the focus of the eye lens is f2; and the distance between the object lens and the eye lens is f1+f2. The rectangular optical wedge array telescope antenna can be used as the antenna for optical receiving and transmitting, and can generate a scanning strip with large width and imaging with high azimuth resolution.

Description

technical field [0001] The invention relates to a synthetic aperture laser imaging radar, which is a rectangular wedge array telescope antenna of the synthetic aperture laser imaging radar, which is used as an optical receiving and transmitting antenna, and can produce large-width scanning strips and high-resolution imaging in azimuth. Background technique [0002] The principle of synthetic aperture laser imaging radar (SAIL) is taken from the principle of synthetic aperture radar in the radio frequency field, and it is the only optical imaging observation method that can obtain centimeter-level resolution at long distances. The optical toe scale on the target surface determined by the divergence of the emitted laser light and the directionality of heterodyne reception is the optical diffraction limit of the telescope objective lens. Since the optical frequency and wavelength are very small, generally on the order of microns, the optical toe is relatively narrow. This is an...

AI Technical Summary

Problems solved by technology

Someone in the United States proposed an improved scheme (Reference 1), using a small-aperture laser emission system to generate a large target illumination area, and at the same time using a small-aperture multi-channel optical system with multi-aperture multi-detectors to achieve large-area echo signal reception, thereby Realize large-width scanning strips, but this method is almost impossible to achieve in engineering

Images