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http://dx.doi.org/10.3807/KJOP.2004.15.3.241

Development of diameter 450 mm Cassegrain tlne collimator  

양호순 (한국표준과학연구원 광기술표준부)
이재협 (한국표준과학연구원 광기술표준)
이윤우 (한국표준과학연구원 광기술표준)
이인원 (한국표준과학연구원 광기술표준)
김종운 ((주)쎄트렉아이 광학)
김도형 ((주)쎄트렉아이 광학팀)
Publication Information
Korean Journal of Optics and Photonics / v.15, no.3, 2004 , pp. 241-247 More about this Journal
Abstract
The collimator is necessary for the assembly and evaluation of high resolution satellite telescope. Traditionally, the off-axis paraboloid has been used as a collimator. However, it has some disadvantages in that it can suffer from air turbulence when the focal length of a collimator is long, which may result in some error in the measurement. In contrast, since the Cassegrain type collimator folds the beam, it occupies smaller space compared to the off-axis paraboloid for the same focal length. This can reduce the air turbulence, which can improve the measurement accuracy. In this paper, we explain the process of design and manufacturing of a diameter 450 mm Cassegrain type collimator, to evaluate the diameter 300 mm satellite telescope. After assembly of primary and secondary mirrors, the final wavefront error of the collimator was 0.07λ(λ=633 nm), which is the diffraction limit.
Keywords
collimator; null lens; Hindle test; tolerance analysis.;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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