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Proceedings Paper

The mechanical design of the large-optics double-shearing interferometer for the test of diffraction-limited wavefront
Author(s): Lijuan Wang; Liren Liu; Luan Zhu; Jianfeng Sun; Yu Zhou; De'an Liu
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Paper Abstract

For testing the large-aperture and the diffraction-limited wavefront, we have proposed a revised Mach-Zehnder double-shearing interferometer with an aperture of 500 millimeters. This interferometer is composed of six same size plates. One plate is used as the beam splitter. Another one plate is acted as the beam combiner. Other plates are used as reflectors and one of them is cut to two parts. In this interferometer, two reflectors can be moved as a whole to change the shearing amount. The reflector cut to two parts is positioned to form the double shearing and it can be move to make the interferometer become an equal optical path system. In fitting process of this interferometer, the six plates are placed in the correct positions and directions by adjusting of the mechanical structure. The mechanical structures is also demanded to maintain the shape and position of the six plates in the application process. Thus the mechanical design of the interferometer is very important. The mechanical design is described in detail in this paper. The beam splitter and the beam combiner are mounted in one plate frame using strap-style support. A reference plane is generated on the lateral surface of the frame to act as a reference for the adjustment of all plates. The mounting structure of the reflectors is similar to the one of the beam splitter and their difference is the addition of the direction adjustment. With the mechanical design, this interferometer can meet the request of the wavefront testing.

Paper Details

Date Published: 19 August 2008
PDF: 7 pages
Proc. SPIE 7091, Free-Space Laser Communications VIII, 70910S (19 August 2008); doi: 10.1117/12.793954
Show Author Affiliations
Lijuan Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Luan Zhu, Shanghai Institute of Optics and Fine Mechanics (China)
Jianfeng Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Yu Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
De'an Liu, Shanghai Institute of Optics and Fine Mechanics (China)

Published in SPIE Proceedings Vol. 7091:
Free-Space Laser Communications VIII
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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