Computer-Generated Hologram Design for High-Precision Aspherical Surface Testing

高松涛 Gao Songtao; 武东城 Wu Dongcheng; 于长淞 Yu Changsong

doi:10.3788/lop53.090901

Computer-Generated Hologram Design for High-Precision Aspherical Surface Testing

Laser & Optoelectronics Progress ◽

10.3788/lop53.090901 ◽

2016 ◽

Vol 53 (9) ◽

pp. 090901

Author(s):

高松涛 Gao Songtao ◽

武东城 Wu Dongcheng ◽

于长淞 Yu Changsong

Keyword(s):

High Precision ◽

Aspherical Surface ◽

Computer Generated Hologram ◽

Surface Testing

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Fabrication of High Precision Computer Generated Hologram for Aspheric Surface Testing by Laser-Direct Writing

Laser & Optoelectronics Progress ◽

10.3788/lop51.110902 ◽

2014 ◽

Vol 51 (11) ◽

pp. 110902

Author(s):

赵龙波 Zhao Longbo ◽

张志宇 Zhang Zhiyu ◽

朱德燕 Zhu Deyan ◽

延超 Wang Yanchao ◽

郑立功 Zheng Ligong ◽

...

Keyword(s):

High Precision ◽

Aspheric Surface ◽

Direct Writing ◽

Laser Direct Writing ◽

Computer Generated Hologram ◽

Surface Testing

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Null Compensator Testing Convex Freeform Surface Mirror with CGH Technology

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.660.163 ◽

2013 ◽

Vol 660 ◽

pp. 163-166 ◽

Cited By ~ 2

Author(s):

Zhong Yu Zhang ◽

Bin Zhi Zhang

Keyword(s):

Freeform Surface ◽

Free Form ◽

Optical Testing ◽

Main Method ◽

Precise Position ◽

Computer Generated Hologram ◽

Free Form Surface ◽

Surface Testing

The Computer Generated Hologram（CGH）technique is the main method for optical testing the free form surface .For testing a convex free form surface mirror, a CGH element with the surface testing, interferometer and free form mirror precise position function was designed by use of appropriative software, the testing precision was less than 0.011λ（λ=632.8nm）in RMS value by this means.

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Research on the Online Test Principle and Error Analysis of Aspherical Optical Surfaces

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.552.434 ◽

2013 ◽

Vol 552 ◽

pp. 434-439

Author(s):

Da Mu ◽

Quan Yong Li ◽

Bo Qi Wu ◽

Yu Nan Du

Keyword(s):

High Precision ◽

Precision Measurement ◽

Measurement Errors ◽

Surface Shape ◽

High Precision Measurement ◽

Aspherical Surface ◽

Optical Surfaces ◽

Advantages And Disadvantages ◽

Swing Arm ◽

Key Factor

For tFor t For tFor the imaging advantages of aspheric optical component, it has been widely used in the aviation, aerospace, defense and civilian high-technology. Aspherical surface shape test is a key factor restricted aspheric processing and a complex sophisticated testing techniques. The well known measurement methods are faulty. Each method has advantages and disadvantages; many methods cannot be used for online testing. In this paper，the geometric principle of a swing-arm profilometer as a novel method to measure aspherics is introduced．The deviation between the actual and the ideal of aspherical surface shape is confirmed by the high-precision measurement for the vertical height with a specific path on the aspherical optical surfaces. By adjusting the location of measuring devices to maintain the distance of rotation center to the center of workpiece equal to the length of swing-arm,we can achieve the measurement for the workpiece of different machining tool. The measurement system mainly consists of the lifting and landing system of the high-precision axis,the high-precision level turntable rotary table, the high rigidity measuring arm and the high precision measurement sensors. And the follow-up data processing puts forward a number of error correction models at the same time. The advantages of the measurement method are that the measurement sports is only a simple turning motion .It will be helpful to reduce measurement errors and improve the efficiency of measurement.

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