Abstract
A multi-configuration collimator is designed to
test high precision optical instruments. Satellite imagers and solar
concentrators are main candidates to be tested with this collimator. By using
different measurement configurations, errors from a single test setup can be
avoided. The performance of the collimator must be better than the equipment to
be tested. This necessity requires the development of a highly precise
instrument with a stable mechanical structure and high quality optical
components. During polishing and metrology of optical mirrors, repeatability is
obtained by the application of opto-mechanical principles to the mirror
holders. Finite element analyses are performed to simulate gravity induced
deformations, assembly tolerances and thermal variations. To understand the
disturbances to the ideal WFE, variations are imported to optical software
environment with the help of Zernike polynomials. In the production phase,
surface qualities of the mirrors are measured by using computer generated
holograms and an interferometric setup. Design, manufacturing and integration
of the collimator are explained in detail.
References
- [1]. Yang H.S., Kang M.S., Kim S.H., Lee Y.W., Lee J.H., Song J.B., Lee H.Y., Kim S.W., Lee J.U. and Lee I.W., Development of Cassegrain type 0.9-m collimator. Proc. SPIE 5869 Optical Manufacturing and Testing VI, 586913, 2005.
- [2]. Bin Z., Xiaohui Z., Cheng W. and Changyuan H., Computer-aided alignment of the complex optical system. Advanced optical manufacturing and testing technology, Proc. of SPIE 4231, 2000, 67-72.
- [3]. Domínguez C., Antón I. and Sala G., Solar simulator for concentrator photovoltaic systems. Opt. Express 16, 2008, 14894-14901.
- [4]. Fontani D., Sansoni P., Sani E., Coraggia S., Jafrancesco D., and Mercatelli L., Solar Divergence Collimators for Optical Characterisation of Solar Components. International Journal of Photoenergy, vol. 2013, Article ID 610173, 2013.
- [5]. Chuanmin Z., Xu T., Liu S., Yang B., Liu Y., Design of primary mirror supporting structure and lightweigthing of space camera. Proc. SPIE 8416, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 84161P, 2012.
- [6]. Weingrod I., Chou C.Y., Holmes B., Hom C., Irwin J.W, Lindstorm O., Lopez F., Stubss D.M. and Wüesler J.P., Design of bipod flexure mounts for the IRIS spectrometer. Proc. SPIE 8836, Optomechanical Engineering 2013, 88360Q, 2013. [7]. Hale L. C., Principles and Techniques for Designing Precision Machines. Ph. D: Thesis, 1999.
- [8]. Chan C.Y., Chen Y.C., Chang S.T., Huang T.M. and Hsu M.Y., Design and analysis of isostatic mounts on a spaceborne lightweight primary mirror. Proc. SPIE 8836, Optomechanical Engineering 2013, 88360K, 2013.
- [9]. Ekinci M. and Selimoglu O., Development of a 0.5m clear aperture Cassegrain type collimator telescope. Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991253, 2016.
Abstract
Farklı optik ölçüm ihtiyaçlarına hizmet etmek için, birincil aynanın tüm
konfigürasyonlarda sabit tutulduğu çok konfigürasyonlu bir kolimatör tasarımı
kullanılması önerilmektedir. Uydu kameraları ve güneş yoğunlaştırıcıları bu
kolimatör ile test edilmeye aday sistemlerdir. Kolimatör optik kalitesinin,
ölçülecek cihazdan daha iyi olması gerekir. Bu gereksinim, kolimatör
teleskopunun, yüksek kaliteli aynalara ve belirtilen koşullar altında
çalışmasını sağlamak için kararlı bir yapıya sahip çok hassas bir cihaz
olmasını zorunlu kılar. Hassasiyet gereksinimleri dikkate alındığında, parlatma
ve metroloji için bağlantıların tekrarlanabilirliğini sağlamak amacıyla, ayna
tutucularına opto-mekanik prensipler uygulanmaktadır. Sonlu Elemanlar Yöntemi,
yer çekimi etkilerini, entegrasyon hatalarını ve sıcaklık değişimlerini simüle
etmek için kullanılmıştır. Deforme olmuş optik yüzeyler için sonlu eleman
analizlerinin sonuçları, tasarımı belirtilen WFE gereksinimlerine göre
değerlendirmek için Zernike polinomları kullanılarak optik analiz ortamına
aktarılır. Aynaların optik kalite ölçümleri, özel yapılmış CGH'ler ve
interferometrik test düzenekleri kullanılarak elde edilir. Kolimatörün
entegrasyonu ve hizalaması ayrıntılı olarak açıklanmıştır.
References
- [1]. Yang H.S., Kang M.S., Kim S.H., Lee Y.W., Lee J.H., Song J.B., Lee H.Y., Kim S.W., Lee J.U. and Lee I.W., Development of Cassegrain type 0.9-m collimator. Proc. SPIE 5869 Optical Manufacturing and Testing VI, 586913, 2005.
- [2]. Bin Z., Xiaohui Z., Cheng W. and Changyuan H., Computer-aided alignment of the complex optical system. Advanced optical manufacturing and testing technology, Proc. of SPIE 4231, 2000, 67-72.
- [3]. Domínguez C., Antón I. and Sala G., Solar simulator for concentrator photovoltaic systems. Opt. Express 16, 2008, 14894-14901.
- [4]. Fontani D., Sansoni P., Sani E., Coraggia S., Jafrancesco D., and Mercatelli L., Solar Divergence Collimators for Optical Characterisation of Solar Components. International Journal of Photoenergy, vol. 2013, Article ID 610173, 2013.
- [5]. Chuanmin Z., Xu T., Liu S., Yang B., Liu Y., Design of primary mirror supporting structure and lightweigthing of space camera. Proc. SPIE 8416, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 84161P, 2012.
- [6]. Weingrod I., Chou C.Y., Holmes B., Hom C., Irwin J.W, Lindstorm O., Lopez F., Stubss D.M. and Wüesler J.P., Design of bipod flexure mounts for the IRIS spectrometer. Proc. SPIE 8836, Optomechanical Engineering 2013, 88360Q, 2013. [7]. Hale L. C., Principles and Techniques for Designing Precision Machines. Ph. D: Thesis, 1999.
- [8]. Chan C.Y., Chen Y.C., Chang S.T., Huang T.M. and Hsu M.Y., Design and analysis of isostatic mounts on a spaceborne lightweight primary mirror. Proc. SPIE 8836, Optomechanical Engineering 2013, 88360K, 2013.
- [9]. Ekinci M. and Selimoglu O., Development of a 0.5m clear aperture Cassegrain type collimator telescope. Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991253, 2016.
Details
| Primary Language | English |
|---|---|
| Journal Section | Natural Sciences |
| Authors | |
| Publication Date | December 24, 2018 |
| Submission Date | May 17, 2018 |
| Acceptance Date | December 4, 2018 |
| Published in Issue | Year 2018 |