Design of compensator for large relative aperture aspherical surface

2007 ◽  
Author(s):  
Gui-ping Shen
Keyword(s):  
Aspherical Surface

scholarly journals Design of an ultrawide angle catadioptric lens with an annularly stitched aspherical surface

2016 ◽  
Vol 24 (3) ◽  
pp. 2664 ◽  
Author(s):  
Dewen Cheng ◽  
Chen Gong ◽  
Chen Xu ◽  
Yongtian Wang
Keyword(s):  
Aspherical Surface

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

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.

Increase in the measurement of the normal vectors of an aspherical surface used in deflectometry

2017 ◽  
Author(s):  
Diana Castán-Ricaño ◽  
Fermín S. Granados-Agustín ◽  
E. Percino-Zacarías ◽  
A. Cornejo-Rodríguez
Keyword(s):  
Aspherical Surface ◽  
Normal Vectors
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