Seamlessly spliced photoelectronic imaging system with double lens using 25 area-array detectors

Abstract

The invention discloses a seamlessly spliced photoelectronic imaging system with double lens using 25 area-array detectors. The photoelectronic imaging system is characterized in that a structure of two imaging systems and a prism beam splitting way are adopted; on a first lens, imaging of 17 area-array detectors is realized, wherein 9 area-array detectors are disposed on a main image surface, and 8 area-array detectors are disposed on four lateral image surfaces, specifically, 2 area-array detectors are disposed on each of the four lateral image surfaces respectively; on a second lens, imaging of 8 area-array detectors is realized, wherein 4 area-array detectors are disposed on a main image surface, and 4 area-array detectors are disposed on four lateral image surfaces, specifically, 1 area-array detector is disposed on each of the four lateral image surfaces respectively; the two imaging systems and the area-array detectors are combined to realize seamless splicing of the image surfaces which are formed by 25 area-array detectors in a 5*5 mode; a beam splitting prism is realized through combination of one rectangular pyramid mirror and four semi-rectangular pyramid mirrors; beam splitting on a beam splitting surface is realized by adopting half-transmission and half-reflection, so that equal-energy beam splitting is realized, and splicing vignetting of the area-array detectors is eliminated. The system disclosed by the invention can be applied to aeronautic and astronautic optical imaging and optical detection instruments and equipment, and is particularly suitable for aeronautic and astronautic surveying and mapping cameras with large fields of view and using ultra-large area-array detectors.

Description

technical field [0001] The invention belongs to a seamless imaging photoelectric system spliced ​​with super large area array detectors, in particular to a seamless splicing imaging photoelectric system with double lenses and 25 area array detectors. Background technique [0002] With the development of aviation and aerospace technology, the demand for photoelectric imaging systems with large area arrays and ultra-large area arrays is becoming more and more urgent. Two methods are often used to achieve large-scale array imaging. One is to customize ultra-large-scale detector devices at detector manufacturers, and the other is to use detector splicing. [0003] At present, the scale of single-chip large area array detectors in the world is about 17k×15k (DMC250), which is not a commodity on the shelf, and the application cost is expensive. In addition, further increasing the scale of single-chip detectors is also a technical bottleneck in the development of current detectors...

AI Technical Summary

Problems solved by technology

There are deficiencies in the long-term stability of the motion mechanism, reliability, and system accuracy, and the long working distance behind

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