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Initial assembly positioning method for four off-axis lenses

A positioning method and off-axis technology, applied in the directions of installation, optics, instruments, etc., can solve the problems of high tolerance requirements, determining the optical axis of the reflector, large misalignment of the off-axis four-mirror lens, etc., to improve the efficiency of installation and adjustment, and improve the The effect of positioning accuracy

Active Publication Date: 2014-08-06
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

[0004] Since the off-axis four-mirror lens components have no physical symmetry after molding, and the tolerance requirements for the system are often higher, considering that the off-axis mirror is a part of the mother mirror, it cannot be accurately centered through the traditional centering process. Determine the optical axis of the mirror; at the same time, the virtual vertex of the off-axis mirror brings difficulties to the adjustment of the spatial position of each mirror, which leads to a large amount of misalignment after the initial installation of the off-axis four-mirror lens. The deviation will be very large, causing the effect of adjustment to fail to converge, resulting in failure of computer-aided adjustment

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  • Initial assembly positioning method for four off-axis lenses
  • Initial assembly positioning method for four off-axis lenses

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Embodiment Construction

[0019] The present invention is an initial installation and positioning method of an off-axis four-mirror lens. The off-axis four-mirror lens includes a main reflector 4, a secondary reflector 5, a third reflector 6, and a plane reflector 7, wherein the main reflector 4 And the third reflector 6 is an off-axis aspheric reflector 3; combined below Figure 1-Figure 2 The specific implementation of the initial installation and positioning of the off-axis four-mirror lens of the present invention is described in detail:

[0020] Interferometer 1 emits a beam of plane waves and passes through zero compensator 2 to become the required aspheric wave. The aspheric wave is reflected by the off-axis aspheric mirror and then returns to the interferometer through the zero compensator. Such as figure 1 As shown, the optical path of the compensator and the interferometer is adjusted to be strictly parallel (the accuracy can be controlled within 10″), and the orientation of the off-axis asp...

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Abstract

Disclosed is an initial assembly positioning method for four off-axis lenses. The four off-axis lenses include the main mirror, the secondary mirror, the third mirror and the plane mirror, wherein the main mirror and the third mirror are off-axis aspheric mirrors. A zero compensator is utilized for calibrating the direction of the optical axes of the off-axis mirrors. The reference is provided for adjusting the space positions of the mirrors through four-rod positioning. Initial assembly positioning of the mirror assembly is achieved through multi-theodolite networking. According to the initial assembly positioning method for the four off-axis lenses, by the combination of the optical axis introduction and four-rod positioning technology, the certain precision of the initial assembly of the four off-axis lenses is achieved, and a reasonable initial point is built for optical system computer-assisted adjustment.

Description

technical field [0001] The invention belongs to the technical field of lens assembly and detection, and relates to a method for initial assembly and positioning of an off-axis four-mirror lens. Background technique [0002] With the wide application and rapid development of space optical remote sensors, large-aperture off-axis optical systems have been widely used due to their characteristics of no central occlusion, high energy utilization, large field of view and high ground resolution. . At present, computer-aided adjustment technology is generally used for the adjustment of off-axis optical lenses. The self-collimating interferometry method detects the wave aberration of the system in real time. The computer-aided adjustment software analyzes the interference fringes, solves the polynomial coefficients of the wave surface, and gives the parameters of each optical element. Adjustment direction and quantitative value guide the correction of the relative position error of ...

Claims

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Application Information

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IPC IPC(8): G02B7/182
Inventor 赵希婷焦文春廖志波张超
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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