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A method for assembling and adjusting a mirror group

An assembly and adjustment method and mirror group technology, which are applied in the field of optical interferometry, can solve problems such as system errors and measurement results, and achieve the effects of improving accuracy, saving computing time, and improving measurement accuracy

Active Publication Date: 2020-04-28
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the non-zero position interference system, the adjustment error will lead to a large system error, and the system error will have a great impact on the measurement results. General machining cannot guarantee that the position of each lens in the system meets the design requirements.

Method used

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  • A method for assembling and adjusting a mirror group
  • A method for assembling and adjusting a mirror group
  • A method for assembling and adjusting a mirror group

Examples

Experimental program
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Effect test

Embodiment 1

[0028] First, according to the designed lens, the mechanical structure of the lens barrel is designed, such as figure 2 In the collimator lens barrel shown, a spacer 2 is used to ensure the distance between each lens 1, and high-precision machining ensures that the tilt and pitch are infinitely close to zero, and the position of each lens 1 will have a symmetrical position The four adjustment screws 3 are screwed into the straight thread against the lens 1. In the center deviation measuring instrument, the center position of the lens 1 can be adjusted by changing how much each adjustment screw 3 is screwed in, and the center of the lens 1 is aligned with the whole After the optical axes of the lens barrels 4 coincide, the adjusting screws 3 are tightened, so that each lens 1 can be fixed in the lens barrel 4 . The specific process is as follows:

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Abstract

The invention discloses a method for assembling and adjusting a mirror group. The steps of the method are as follows: set the size of the lens barrel according to the parameters of the lens group, and set four adjustment screws evenly along the circumference of the lens barrel wall corresponding to each lens; Adjust the position of the instrument, adjust the horizontal position and pitch position of the workbench and the optical axis of the central laser beam; secondly, adjust the optical axis of the first lens through the adjustment screw, fix it with a spacer and insert the next lens to continue the optical axis Adjustment; and record the actual adjustment error of each lens; substitute each lens parameter into the simulation system to obtain the ideal simulation wavefront of the lens group; measure the adjusted lens barrel to obtain the actual wavefront, and compare the ideal simulation wavefront with the measured wavefront By comparison, the error between the ideal simulated wavefront and the measured wavefront obtained by the re-simulation is smaller than the threshold, so that the adjustment error of the mirror assembly can be obtained. The error calibration precision of the present invention is high, and the measuring precision of the whole optical system is also greatly improved.

Description

technical field [0001] The invention relates to the technical field of optical interference measurement, in particular to an assembly and adjustment method of a mirror group. Background technique [0002] Modern high-performance optoelectronic systems, such as large-scale astronomical telescopes, large-scale augmented reality (AR), large-scale virtual reality (VR), and space cameras, require a simple optical structure using only one imaging mirror to achieve high-performance optical quality. Free-form optical elements can correct almost all aberrations by using their own high-order changes in curvature, while simplifying the system structure [5-8] , is an ideal component of modern high-performance optoelectronic systems. However, the large aperture and large degree of freedom of this type of component have brought many complex and difficult scientific problems to the high-precision measurement of its surface shape, and it is difficult to meet the quality of the imaging opti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/02G02B27/62
CPCG02B7/021G02B7/023G02B7/026G02B27/62
Inventor 沈华王劲松李嘉朱日宏高金铭矫岢蓉孙越陈磊
Owner NANJING UNIV OF SCI & TECH
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