Iterative deformation calibration of a transmission flat via the ring point support on a 300-mm-aperture vertical Fizeau interferometer

2021 ◽  
Author(s):  
Yuntao Wang ◽  
Lei Chen ◽  
Chenhui Hu ◽  
Jia Chen ◽  
Zhengyu Zhang ◽  
...  
Keyword(s):  
Fizeau Interferometer ◽  
Point Support

Dynamic matching of a 300-mm-aperture high-precision interference cavity via a double-ring-point support

2021 ◽  
pp. 126998
Author(s):  
Yuntao Wang ◽  
Lei Chen ◽  
Chenhui Hu ◽  
Zhengyu Zhang ◽  
Jia Chen ◽  
...  
Keyword(s):  
High Precision ◽  
Dynamic Matching ◽  
Point Support ◽  
Double Ring

scholarly journals Diva - A Small Satellite for Global Astrometry and Photometry

1998 ◽  
Vol 11 (1) ◽  
pp. 583-583
Author(s):  
S. Röser ◽  
U. Bastian ◽  
K.S. de Boer ◽  
E. Høg ◽  
E. Schilbach ◽  
...  
Keyword(s):  
High Precision ◽  
Wavelength Range ◽  
Fizeau Interferometer ◽  
Proper Motions ◽  
Small Satellite ◽  
Short Overview ◽  
Photometric Observations ◽  
Photometric Measurements ◽  
First Time ◽  
Astronomy And Astrophysics

DIVA (Double Interferometer for Visual Astrometry) is a Fizeau interferometer on a small satellite. It will perform astrometric and photometric observations of at least 4 million stars. A launch in 2002 and a minimum mission length of 24 months are aimed at. A detailed description of the experiment can be obtained from the DIVA homepage at http://www.aip.de:8080/᷉dso/diva. An overview is given by Röser et al., 1997. The limiting magnitude of DIVA is about V = 15 for spectral types earlier than M0, but drops to about V = 17.5 for stars later than M5. Table 1 gives a short overview on DIVA’s performance. DIVA will carry out a skysurvey complete to V = 12.5. For the first time this survey will comprise precise photometry in at least 8 bands in the wavelength range from 400 to 1000 nm. DIVA will improve parallaxes by a factor of 3 compared to Hipparcos; proper motions by at least a factor of 2 and, in combination with the Hipparcos observations, by a factor of 10 for Hipparcos stars. At least 30 times asmany stars as Hipparcos will be observed, and doing this DIVA will fill the gap in observations between Hipparcos and GAIA. DIVA’s combined astrometric and photometric measurements of high precision will have important impacts on astronomy and astrophysics in the next decade.

The Determination of the Three-Point Support Design of Machine Tool Based on iSIGHT

2014 ◽  
Vol 607 ◽  
pp. 342-345
Author(s):  
Sheng Hui Zhao ◽  
Xiao Chuang Zhu ◽  
Da Wei Zhang
Keyword(s):  
Machine Tool ◽  
High Precision ◽  
Multidisciplinary Optimization ◽  
Joint Surface ◽  
Objective Functions ◽  
Multi Objective Optimization ◽  
Support Design ◽  
Optimal Position ◽  
Point Support

In order to meet the requirements of high-precision machine tool, it has been an important factor to select an appropriate way to support the bed. By building a multidisciplinary optimization (MDO) process based on iSIGHT, this article select the deformation difference of the guides and the deformation difference of the joint surface between column and bed of the machine tool as the objective functions, and then conduct a multi-objective optimization (MOO) of the positional parameters of the three-point support. Eventually the optimization result is given and the optimal position of the three-point support is determined.

Three-point-support method based on position determination of supports and wafers to eliminate gravity-induced deflection of wafers

2016 ◽  
Vol 46 ◽  
pp. 339-348 ◽  
Author(s):  
Haijun Liu ◽  
Xianglong Zhu ◽  
Renke Kang ◽  
Zhigang Dong ◽  
Xiuyi Chen
Keyword(s):  
Position Determination ◽  
Point Support

Fizeau interferometer for global astrometry in space

2004 ◽  
Vol 43 (4) ◽  
pp. 721 ◽  
Author(s):  
Davide Loreggia ◽  
Daniele Gardiol ◽  
Mario Gai ◽  
Mario G. Lattanzi ◽  
Deborah Busonero
Keyword(s):  
Fizeau Interferometer

Phase error calculation in a Fizeau interferometer by Fourier expansion of the intensity profile

1996 ◽  
Vol 35 (1) ◽  
pp. 61 ◽  
Author(s):  
B. V. Dorrío ◽  
J. Blanco-García ◽  
C. López ◽  
A. F. Doval ◽  
R. Soto ◽  
...  
Keyword(s):  
Fourier Expansion ◽  
Phase Error ◽  
Intensity Profile ◽  
Fizeau Interferometer ◽  
Error Calculation
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