scholarly journals Accurate testing of aspheric surfaces using the transport of intensity equation by properly selecting the defocusing distance

2016 ◽  
Vol 55 (35) ◽  
pp. 10067 ◽  
Author(s):  
Peyman Soltani ◽  
Ahmad Darudi ◽  
George Nehmetallah ◽  
Ali Reza Moradi ◽  
Javad Amiri
Keyword(s):  
Aspheric Surfaces ◽  
Transport Of Intensity Equation

Tilt angle correction based forming algorithm for high steepness aspheric surfaces polishing

Optik ◽  
2021 ◽  
pp. 167082
Author(s):  
Changjun Jiao ◽  
Yong Shu ◽  
Zhen Zhang ◽  
Bo Wang ◽  
Feihai Gao
Keyword(s):  
Tilt Angle ◽  
Aspheric Surfaces ◽  
Angle Correction

scholarly journals Computational Method for Wavefront Sensing Based on Transport-Of-Intensity Equation

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 177
Author(s):  
Iliya Gritsenko ◽  
Michael Kovalev ◽  
George Krasin ◽  
Matvey Konoplyov ◽  
Nikita Stsepuro
Keyword(s):  
A Priori ◽  
Spherical Wave ◽  
Computational Method ◽  
Optical Systems ◽  
Radius Of Curvature ◽  
Imaging Method ◽  
Wavefront Sensing ◽  
Phase Imaging ◽  
Transport Of Intensity Equation ◽  
Priori Information

Recently the transport-of-intensity equation as a phase imaging method turned out as an effective microscopy method that does not require the use of high-resolution optical systems and a priori information about the object. In this paper we propose a mathematical model that adapts the transport-of-intensity equation for the purpose of wavefront sensing of the given light wave. The analysis of the influence of the longitudinal displacement z and the step between intensity distributions measurements on the error in determining the wavefront radius of curvature of a spherical wave is carried out. The proposed method is compared with the traditional Shack–Hartmann method and the method based on computer-generated Fourier holograms. Numerical simulation showed that the proposed method allows measurement of the wavefront radius of curvature with radius of 40 mm and with accuracy of ~200 μm.

scholarly journals Optical Design of the Goaly3 Multi-Mirror Telescope System with a Wide Field of View

2021 ◽  
Vol 11 (3) ◽  
pp. 1200
Author(s):  
Junliu Fan ◽  
Quanying Wu ◽  
Baohua Chen ◽  
Lin Liu ◽  
Lei Chen
Keyword(s):  
Fill Factor ◽  
Optical Design ◽  
Tolerance Analysis ◽  
Field Of View ◽  
Wide Field ◽  
Aspheric Surfaces ◽  
The Monte Carlo Method ◽  
Wide Field Of View ◽  
Mirror Telescope ◽  
Telescope System

A Golay3 multi-mirror telescope (MMT) system is designed in this paper. The fill factor of the Golay3 MMT is derived from the angular resolution of the telescope. An initial configuration is established according to the paraxial optical theory. A three-element aspheric corrector group is designed and placed in the converging light cone to enlarge the field of view (FOV) of the Golay3 MMT. The tolerance analysis for each surface of the Golay3 MMT is conducted using the Monte Carlo method. The design results show the FOV of the Golay3 MMT system can be increased to 1.5° with the insertion of a three-element aspheric corrector group. The results of the tolerance analysis indicate that most tolerances are loose, while some decenter tolerances relating with the aspheric surfaces are relatively tight, but still within an acceptable range.

scholarly journals Form Accuracy in Raster Flycutting of Asymmetric Aspheric Surfaces. Effect of Laser Positioning Error Due to Fluctuation in Atmospheric Pressure.

2002 ◽  
Vol 68 (665) ◽  
pp. 308-314
Author(s):  
Katsumi YAMAGUCHI ◽  
Kazuo MURATA ◽  
Seiichirou KITAGAWA ◽  
Hiroshi OHWARI ◽  
Kousuke IMAMURA ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Positioning Error ◽  
Aspheric Surfaces ◽  
Form Accuracy
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