Secondary constant measuring method for aspherical mirrors

A quadratic constant and measurement method technology, applied in the direction of measuring devices, instruments, optical devices, etc., can solve problems such as difficult to measure accurately, and achieve the effects of easy operation, reduced detection cost, and balanced performance
CN104034262AActive Publication Date: 2014-09-10INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
3 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
Publication Date
2014-09-10

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a secondary constant measuring method for aspherical mirrors, and belongs to the field of photoelectric technology detection. The measuring method is performed in a vertical interferometer, and mainly aims at measuring the secondary constant and the vertex curvature radius of the aspherical mirror without a hole at the center. The method comprises the steps of: firstly using the interferometer to find the position of the cat eye of the mirror to be measured as an initial position of the interferometer, vertically moving the interferometer along the optical axis, extracting the pixel radius of the zero stripe of the interferometer, working out the actual radius of the mirror by calibrated distortion, and then working out the secondary constant and the vertex curvature radius of the mirror to be measured by using the corresponding moving distance according to a formula. The method is simple in structure, flexible to use and high in accuracy.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of advanced optical manufacturing and detection, and relates to an optical detection method, in particular to a measurement method for the quadratic constant of an aspheric mirror. Background technique

[0002] Most of the curved surfaces of lenses and mirrors used in optical systems are flat and spherical. The reason is that these simple curved surfaces are easy to process and inspect, but they have certain limitations when used in some high-precision imaging systems. For optical systems, the application of aspheric surfaces can increase the freedom of optical design, and play an important role in improving the imaging quality of optical systems, improving optical performance, and reducing overall size and weight. Compared with spherical surfaces, aspheric surfaces have better advantages in correcting aberrations. Often, one aspheric mirror can replace many spherical mirrors, thus greatly reducing the number and weig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More