Multi-detector optical system linkage focusing mechanism and focusing method thereof

An optical system and detector technology, applied in the optical field, can solve the problems of increasing the number of operators and system complexity, and achieve the effect of reducing the number of operators, reducing costs, and reducing focusing devices

Active Publication Date: 2014-02-26
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

Although the various subsystems in the current optical system can share some structures (such as the cabinet, primary and secondary mirrors), they all

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  • Multi-detector optical system linkage focusing mechanism and focusing method thereof
  • Multi-detector optical system linkage focusing mechanism and focusing method thereof
  • Multi-detector optical system linkage focusing mechanism and focusing method thereof

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[0025] see figure 1 , 2 as well as image 3 , the present invention provides a multi-detector optical system linkage focusing mechanism, which includes a mid-focus optical subsystem 1, and the focal length of the subsystem is f 1 =1000mm, caliber 2a 1 =250mm, F-number is 4; telephoto optical subsystem 2, the focal length of this subsystem is f 2 =2000mm, caliber 2a 2 =360mm, F-number is 5.6; short-focus optical subsystem 3, the focal length of this subsystem is f 3 =400mm, caliber 2a 3 =200mm, F-number is 2; three visible light detectors 4, the pixel size is 14μm×14μm; object plane distance calculation unit 5, this unit will receive the feedback amount of the moving distance of the telephoto optical subsystem detector, and the amount Converted into the object plane distance Δl+l, and then respectively converted into the movement amount of the detector of the medium and short-focus optical subsystems, and fed back to the control unit 7 through the feedback circuit 6; the ...

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Abstract

The invention provides a multi-detector optical system linkage focusing mechanism and a focusing method thereof. The multi-detector optical system linkage focusing mechanism comprises a medium focal length optical sub-system, a long focal length optical sub-system, a short focal length optical sub-system, detectors, an object plane distance calculating unit, a reactive circuit, position control units, a position measuring unit, a focusing unit and a detector mobile module, wherein there are three detectors which are respectively connected with the medium focal length optical sub-system, the long focal length optical sub-system and the short focal length optical sub-system; the object plane distance calculating unit is connected with the reactive circuit; and the object plane distance calculating unit is connected with the medium focal length optical sub-system, the long focal length optical sub-system and the short focal length optical sub-system. According to the invention, the multi-detector optical system linkage focusing mechanism has the advantages of simple control, high focusing precision, lightness, convenience, substantially reduced waste of labor and material resources, and the like.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a multi-load focusing mechanism, in particular to a multi-detector optical system linkage focusing mechanism and a focusing method thereof. Background technique [0002] With the breakthrough of zoom optical system technology, more and more shipboard, ground-based, space-based theodolite and various astronomical observation systems, as well as film and television photography The system has adopted the zoom optical system to replace the traditional fixed focus system. When the optical system forms an image, the object image formula It can be seen that the image distance will change with the change of the object distance; especially in the zoom optical system, there is a more obvious problem of image plane movement during the entire optical measurement process, so a focusing mechanism is required to compensate for the distance of image plane movement; in practice The image plane movement cau...

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Application Information

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IPC IPC(8): G02B7/28
Inventor 刘波梅超郝伟李刚杨晓旭邓晓国
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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