High precision interferometer for measuring mid-spatial frequency departure in free form optics

2007 ◽  
Author(s):  
Leslie L. Deck
Keyword(s):  
Spatial Frequency ◽  
High Precision ◽  
Free Form

Full-field deflectometry for detection of mid-spatial frequency errors of high-precision mirrors (Conference Presentation)

Optifab 2019 ◽  
2019 ◽  
Author(s):  
Philippe Antoine ◽  
Luc Boussemaere ◽  
Arno Bouwens ◽  
Vincent Moreau ◽  
Benoit Borguet ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
High Precision ◽  
Full Field

The Free-Form Surface Five-Axis Machining Global Interference Detection and Adjustment of Cutter Shaft

2011 ◽  
Vol 393-395 ◽  
pp. 1550-1553
Author(s):  
Peng Cheng Wu ◽  
Fang Chen Xia ◽  
Hai Ning Tu
Keyword(s):  
Surface Structure ◽  
High Precision ◽  
High Efficiency ◽  
Free Form ◽  
Interference Detection ◽  
Tool Interference ◽  
Free Form Surface ◽  
Five Axis ◽  
Global Surface ◽  
Interference Problems

Proposed a construction method of visual cone, to solve the surface 5-axis NC machining tool interference problems with the surface. At any point on the surface structure the visual cone area, according to visual cone determine whether the global tool interference with surface, and correct the tool spindle of interference cutter, solved the global surface and tool interference problems successfully. The application shows, this method is of high efficiency, high precision.

High precision measurements of the free form mirror geometries

2017 ◽  
Author(s):  
Denis Dontsov ◽  
Ilko Rahneberg ◽  
Wolfgang Pöschel ◽  
Walter Schott
Keyword(s):  
High Precision ◽  
Precision Measurements ◽  
Free Form

scholarly journals Mid-spatial frequency removal on aluminum free-form mirror

2019 ◽  
Vol 27 (18) ◽  
pp. 24885 ◽  
Author(s):  
Hongyu Li ◽  
David D. Walker ◽  
Xiao Zheng ◽  
Xing Su ◽  
Lunzhe Wu ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
Free Form

Small Pitch Tool for Removing Middle Spatial Frequency Errors

2013 ◽  
Vol 552 ◽  
pp. 137-141
Author(s):  
Gao Wen Wang
Keyword(s):  
Spatial Frequency ◽  
Removal Rate ◽  
High Spatial Frequency ◽  
Free Form ◽  
Positional Error ◽  
Cnc Machine ◽  
Optical Elements ◽  
Small Pitch ◽  
High Flexibility ◽  
Small Tool

More and more optical elements are needed in modern industry, which is reflected by both the bigger amount of requirement, and more complicated designed surface such as asphere and even free form surface. As a result, optical polishing using small tools on CNC machines is applied widely in the whole world, which has a lot of advantages such as fast speed, high accuracy, high flexibility and so on. But the small tool polishing can also cause in some problems. For example, the middle spatial frequency errors (MSFE) may be increased during the polishing. The reasons may consist of the following aspects: 1) the positional error of the workpiece; 2) the mistake of error data input; 3) the unexpected stop of the polishing process; 4) the stabilization of the slurry density during the process; 5) the temperature change of the contact area between the tool and the workpiece and so on. As is known, pitch is usually used in traditional optical manufacture, and it can reduce the middle and high spatial frequency errors in a large extent because of the different removal rate between the high points and low points on the optical surface. Therefore, the application of the combination of pitch and small tool is described in this paper in order to solve the MSFE problem, and we have got good polishing results of reducing the error from 2.155nm to 0.267nm by using the new pitch tool on the CNC machine after two runs.

High precision free-form optics and application to soft x-ray mirrors

2020 ◽  
Author(s):  
Takehiro Kume ◽  
Kentarou Hiraguri ◽  
Yoichi Imamura ◽  
Hiroaki Miyashita ◽  
T. Mukoda ◽  
...  
Keyword(s):  
High Precision ◽  
Free Form ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document