naa a22 4500 510823262 CHVBK 20180411083544.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s12541-013-0053-7 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0053-7 Chen Der-Chin Department of Electrical Engineering, Feng Chia University, 100, Wenhwa Road, 40724, Seatwen, Taichung, Taiwan, ROC aut Optical axis alignment for three-aspherical mirrors system using five parallel laser beams and moiré method [Elektronische Daten] [Der-Chin Chen] In this paper, a new optical technique involving the five parallel laser beams alignment device and moiré method was developed to rapidly and accurately align the optical axis of three-aspherical mirrors system (TAMS). In this method, the optical axis of a first aspherical mirror is made parallel to the "five incident parallel laser beams” in the plane of incidence. The height and orientation of the first aspherical mirror are fine tuned and the alignment is assured by examining the direction of these five reflected laser beams. The optical axes of second and third aspherical mirror are aligned by five parallel laser beams in accordance with the configuration parameter of optical system in sequence. The effective focal length (EFL) of the TAMS was measured by moiré method and image formula. This novel method is used to align the optical axis of TAMS and the EFL deviation estimated has an accuracy of 1%. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Alignment nationallicence Aspherical mirror nationallicence Effective focal length nationallicence International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/3(2013-03-01), 381-386 2234-7593 14:3<381 2013 14 12541 https://doi.org/10.1007/s12541-013-0053-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0053-7 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Chen Der-Chin Department of Electrical Engineering, Feng Chia University, 100, Wenhwa Road, 40724, Seatwen, Taichung, Taiwan, ROC aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/3(2013-03-01), 381-386 2234-7593 14:3<381 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer