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CAS IR Grid
机构
长春光学精密机械与物... [4]
采集方式
OAI收割 [4]
内容类型
会议论文 [4]
发表日期
2009 [4]
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内容类型:会议论文
发表日期:2009
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Study on the calculation and application for asphericity of rectangle off-axis aspherics (EI CONFERENCE)
会议论文
OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:
Xuan B.
;
Song S.-M.
;
Xie J.-J.
;
Xie J.-J.
;
Zhang H.
收藏
  |  
浏览/下载:58/0
  |  
提交时间:2013/03/25
Asphericity which affects the manufacturing process and the grinding quantity is an important parameter of optical aspherics. In this paper
the approximation
the least square fitting
wavefront aberration
sag methods are given for the calculation of optical asphericity. The effects of different definitions of optical asphericity are analysed to optimize the process of manufacture. A sag method is presented to solve the best-fit sphere and asphericity for an off-aixs aspheric mirror with a rectangle aperture of 180mm145mm
and polishing quantity and distribution plots are given. The optical manufacturing and testing technology for different choices of best-fit spheres and asphericity are described and analyzed. Therefore
proper definition of optical asphericity which is useful to manufacturing is very important for optical fabrication and test. 2009 SPIE.
Alignment of off-axis asphere and compensator with four poles (EI CONFERENCE)
会议论文
OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
作者:
Li J.
;
Chen Y.
;
Li J.
;
Li J.
;
Wang P.
收藏
  |  
浏览/下载:54/0
  |  
提交时间:2013/03/25
Aspheres are utilized widely thanks to the development of optical design
manufacture and testing. Compensators are usually necessary when aspheres are under test. The alignment of aspheres and their compensators is a risk because it's tough to check whether the compensators work in right way. A new method of alignment with four poles is put forward in this paper. Optical interval error can be tight while it is quite important due to direct influence on central curvature
conic constant and high order coefficients of aspherical surface. A modified on-axis Foucault apparatus is set up since it makes the optical axis visible and helps to control the error of off-axis amount. Some small holes are drilled in the metallic cell of the compensator so that the ends of poles can be stably relied on in order to increase operational repeatability. The method has been carried out practically and it matches the measurement result given by a set of theodolites. 2009 SPIE.
Study on the influence and disposal method of the micro-cracks of optical components (EI CONFERENCE)
会议论文
OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:
Xuan B.
;
Xie J.-J.
;
Xie J.-J.
;
Zhang H.
;
Zhang H.
收藏
  |  
浏览/下载:21/0
  |  
提交时间:2013/03/25
Micro-crack is one of the most effective factor to the intensity and service life of optical components. Owing to the micro-crack on surface
actual strength of optical components is reduced severely
even less than ten-percent of its theoretical strength. According to fracture mechanics
the mechanisms of the formation and propagation of micro-crack and the growth theory of sub-critical micro-crack are discussed in the paper firstly. Based on practice
an on-line test method disposing etching holes-the molecule-infiltrating method and the principles of acid-etching method disposing micro-crack are described. Followed by the demolishing mechanism of abrasives and a more reasonable removal redundancy of fine-grinding and polishing during
optical production is given by using abrasives in different-size orderly. 2009 SPIE.
Double-swing method used for polishing off-axis aspherical mirrors (EI CONFERENCE)
会议论文
OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:
Chen Y.
;
Song S.-M.
;
Xuan B.
;
Wang P.
;
Li J.-F.
收藏
  |  
浏览/下载:23/0
  |  
提交时间:2013/03/25
Based on the characteristics of off-axis aspherical surface
the comparison of simulation effects under different parameters is made. In order to achieve optimal parameters
a new method used for polishing off-axis aspherical mirrors-Double-Swing Method (DSM) is proposed in this paper
a high order off-axis rectangle aspherical mirror has been polished by DSM. The final result of profile measurements of 12nm
and the polishing mechanism of DSM is introduced. The mathematical model of the DSM with steady movement state is established.The movement of this mathematical model is simulated in a programming language
RMS is achieved. The result indicates that the method is of practice and has even higher working efficiency and precision. 2009 SPIE.