Seamless optical splicing method for 3*3 flat detectors

Abstract

The invention discloses a seamless optical splicing method for 3*3 flat detectors. A symmetric prism structure is adopted for image plane light splitting, four flat detectors are arranged on an optical axis perpendicular transmission image plane, and five flat detectors are arranged on four side faces. A few of spliced structures are symmetric, simple and distributed in a centralized way, and energy is not lost after total-reflection total-transmission light splitting. The seamless splicing method can be applied to aviation and aerospace optical imaging, optical detection instruments and equipment and is particularly suitable for aviation and aerospace imaging photoelectric systems of extra-large flat detectors.

Description

technical field [0001] The invention belongs to a method for seamless optical splicing of super large area array detectors, in particular to a method for seamless optical splicing of 3×3 area array detectors by adopting a symmetrical prism structure. 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 realize large-scale area array imaging. One is to customize ultra-large-scale area array detector devices at the area array detector manufacturer, and the other is to use area array detectors to splice. [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 area array detectors is also a techni...

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Problems solved by technology

[0005] Chen Xunan et al. In the focal plane optical splicing technology of multi-slice area CCD image sensor, the single-lens optical splicing method can realize the splicing of multi-slice area CCD, but the number of light splitting is too many, the loss of light energy is serious, and the working distance behind the optical system is required to be large. However, it cannot be realized in the large field of view surveying and mapping camera system or there is a serious shortage of light energy

[0006] Chinese invention patent CN 101650423 B’s optical splicing of large area array photoelectric devices can only realize the splicing of area array detectors in 2×3 or 2×2 modes, the positions of the prisms used for light splitting are asymmetrical, and the structure and splicing of the prisms are complicated; The contact surface is small and it is difficult to guarantee long-term working stability; the relative relationship between each prism is independent and not centralized, and splicing requires complex mechanical structures for fixing and installation, which is large in size and heavy in weight, which does not meet the needs of lightweight aerospace

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