Computer-aided alignment for space telescope optical system

2006 ◽  
Author(s):  
Yifan Huang ◽  
Lin Li ◽  
Yinhua Cao
Keyword(s):  
Optical System ◽  
Space Telescope ◽  
Computer Aided

Study on computer-aided alignment method of a three-mirror off-axis aspherical optical system

2010 ◽  
Author(s):  
Xi-ting Zhao ◽  
Wen-chun Jiao ◽  
Zhi-bo Liao ◽  
Yun Wang ◽  
Jia-yi Chen
Keyword(s):  
Optical System ◽  
Alignment Method ◽  
Computer Aided

scholarly journals Current Status of the Astrometric Capabilities of the Hubble Space Telescope Fine Guidance Sensors

1991 ◽  
Vol 127 ◽  
pp. 68-76
Author(s):  
W.H. Jefferys ◽  
G.F. Benedict ◽  
R.L. Duncombe ◽  
O.G. Franz ◽  
L.W. Fredrick ◽  
...  
Keyword(s):  
Optical System ◽  
Reference Frames ◽  
Optical Axis ◽  
Hubble Space Telescope ◽  
Current Knowledge ◽  
Spherical Aberration ◽  
Radial Distance ◽  
Current Status ◽  
Space Telescope ◽  
Wavefront Error

AbstractThe Fine Guidance Sensors (FGSs) are the instrument of choice for most astrometric measurements with the Hubble Space Telescope (HST). The observed amount of spherical aberration in the Ritchey Chretien optical system does not affect positional measurements with perfectly aligned FGSs because they are interferometers. The FGSs combine wavefronts from points in the exit pupil with other points which are at the same radial distance from the optical axis. Asymmetric aberrations such as coma and astigmatism do affect the measured positions. The current knowledge of the HST wavefront error, the FGS operation and the implications for milliarcsecond relative astrometry are discussed. It is still planned to use the HST to tie the HIPPARCOS and VLBI Reference Frames together at the few milliarcsecond level.

A DETECTIVE STUDY ON PARAXIAL DIGITAL HOLOGRAPHY IN ACQUIRING THE AMPLITUDE AND PHASE SIMULTANEOUSLY

2005 ◽  
Vol 02 (02) ◽  
pp. 93-99
Author(s):  
JUN-CHANG LI ◽  
RONG-XIN GUO ◽  
MIN WANG
Keyword(s):  
Image Processing ◽  
Theoretical Model ◽  
Numerical Computation ◽  
Optical System ◽  
Digital Holography ◽  
Image Processing Techniques ◽  
Measured Object ◽  
Computer Aided ◽  
Processing Techniques

A theoretical model to actualize digital holographic detection with the help of paraxial optical system based on the inverse calculation of diffraction is introduced briefly. In addition, we proposed a method to actualize the measurement when the measured object modulates the amplitude and the phase of object light simultaneously. The simulated experimental example will be illustrated with the help of numerical computation and computer-aided image processing techniques.

Information and Metrology-Driven Optimisation of Wavefront Error in Telescope-Detected Radiation

2020 ◽  
pp. 37-51
Author(s):  
V.V. Sychev ◽  
A.I. Klem
Keyword(s):  
Wave Front ◽  
Uniform Distribution ◽  
Optical System ◽  
Software Package ◽  
Spherical Aberration ◽  
Space Telescope ◽  
Exit Pupil ◽  
Wavefront Error

The paper presents a solution to an information and metrology problem concerning minimising the wave-front error of telescope-detected radiation. As an example, we used aberration computation and simulation describing the optical system of the space telescope installed in the Millimetron observatory. We show that many factors that affect a space telescope decrease the quality of the image obtained. It is necessary to eliminate the effects of the distortion-generating factors and reduce their contribution to the total wavefront error. As the dimensions of the collecting aperture in telescopes increase, the factors that distort the wavefront of the radiation detected by the telescope begin to significantly affect the quality of the image obtained. We consider the ways of decreasing the effects of the distortion-generating factors caused by aberrations in the optical system. One of the solutions to this problem is to select a rational configuration of the space telescope optical system. In order to minimise the aberration, we used the Zemax 13 Release 2 SP4 Premium software package to simulate the optical system, to analyse and optimise it so as to diminish the scattering spot in the exit pupil. We achieved this goal by decreasing the spherical aberration and ensuring a more uniform distribution of it over the field. We used the data obtained to estimate the admissible dimensions of the misalignment spot

Coordinate Datum Transition Method for Optical System Computer-Aided Alignment

2014 ◽  
Vol 34 (3) ◽  
pp. 0322003
Author(s):  
顾志远 Gu Zhiyuan ◽  
颜昌翔 Yan Changxiang ◽  
胡春晖 Hu Chunhui ◽  
王洋 Wang Yang ◽  
高志良 Gao Zhiliang ◽  
...  
Keyword(s):  
Optical System ◽  
Computer Aided
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