Long-focus transmission-type quasi telecentric three-linear-array stereoscopic mapping optical system

Abstract

The invention relates to a long-focus transmission-type quasi telecentric three-linear-array stereoscopic mapping optical system. The long-focus transmission-type quasi telecentric three-linear-array stereoscopic mapping optical system comprises three optical subsystems with completely consistent structure forms, wherein each optical subsystem comprises a front lens group (1), a diaphragm (6), a middle lens group (2), a rear lens group (3), a transflective prism (4) and a receiving image surface (5), all of which are sequentially arranged along the light ray incidence direction, the caliber of a radiation beam of a mapping target is regulated after the radiation beam passes through the front lens group (1), the radiation beam is full of the diaphragm (6) to exit, an angle amplification ratio is regulated after the outgoing beam passes through the middle lens group (2) and the rear lens group (3), and the outgoing beam exits to the transflective prism (4), so that the outgoing beam is divided and then is imaged on the receiving image surface (5). The optical system disclosed by the invention has the advantages of long-focus transmission type, quasi telecentricity, zero distortion, good stability of element of interior orientation, high optical machine structure integration degree and the like, and can realize higher-proportion stable mapping function in the terrain and the geomorphology of a target scene through the reasonable arrangement of a front-vision camera, a positive-vision camera and a back-vision camera.

Description

technical field [0001] The invention belongs to the technical field of space optical remote sensors, and relates to an optical imaging system applied to a space three-line array three-dimensional surveying and mapping camera. Background technique [0002] The main task of the surveying and mapping camera is to take stereoscopic photography of the earth's surface, obtain multi-dimensional image data of ground objects, use surveying and mapping processing technology to process the image data, and accurately measure the topography, ground object shape, size, attribute and spatial position information. There are many ways to achieve stereoscopic imaging, such as single-lens three-line array, single-line array on the same track, single-line array on different track, double-line array on the same track, three-lens three-line array, etc. Each method has its own characteristics, and the accuracy of the stereoscopic image It is also different, and the requirements for the stability o...

AI Technical Summary

Problems solved by technology

[0005] The optical systems of surveying and mapping cameras that have been put into use at present adopt the transmissive structure type, all of which are short-focus optical systems, and there is no precedent for the successful application of long-focus transmissive systems.

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