Interferometrical profilometer for high precision 3D measurements of free-form optics topography with large local slopes

2021 ◽  
Author(s):  
Michael Kühnel ◽  
Enrico Langlotz ◽  
Ilko Rahneberg ◽  
Denis Dontsov ◽  
Jürgen Probst ◽  
...  
Keyword(s):  
High Precision ◽  
Free Form ◽  
3D Measurements

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

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

Processing Flow of Optical Fabrication for Correcting Lenses

2007 ◽  
Vol 24-25 ◽  
pp. 117-124
Author(s):  
Yun Zhang ◽  
Jing Feng Zhi
Keyword(s):  
High Precision ◽  
Spherical Shape ◽  
Measuring Method ◽  
Free Form ◽  
Optical Fabrication ◽  
Rotation Axes ◽  
Precision Measuring ◽  
Aspheric Lenses ◽  
Axes Of Symmetry ◽  
Processing Flow

This paper presents the processing flow and results of optical fabrication for an optical correcting lens with a free-form surface, namely a free-form lens. Because a correcting lens has no rotation axes of symmetry and its surface cannot be expressed by a continuity equation, its processing technology is different with that of general aspheric lenses. The correcting lens was firstly formed from a glass workblank with flat face using diamond abrasion wheel with spherical shape, and then loose abrasive lapped and polished with oblique axis spherical tools to decrease the surface roughness and increase the surface accuracy based on the measuring result after forming. At the lapping and polishing stages, two processing methods are employed. One is to control the processing pressure, and the other is based on dwell time. Since high precision fabrication is closely related with high precision measuring, this paper also presents a high precision non-contact optical measuring method based on image transforming for correcting lenses. The effectiveness of the processing flow and technology is confirmed by an experiment in which a workblank is processed into a satisfying correcting lens.

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