The mechanical design of the large-optics double-shearing interferometer for the test of diffraction-limited wavefront

Lijuan Wang; Liren Liu; Luan Zhu; Jianfeng Sun; Yu Zhou; De'an Liu

doi:10.1117/12.793954

19 August 2008 The mechanical design of the large-optics double-shearing interferometer for the test of diffraction-limited wavefront

Lijuan Wang, Liren Liu, Luan Zhu, Jianfeng Sun, Yu Zhou, De'an Liu

Author Affiliations +

Proceedings Volume 7091, Free-Space Laser Communications VIII; 70910S (2008) https://doi.org/10.1117/12.793954
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

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.

Citation Download Citation

Lijuan Wang, Liren Liu, Luan Zhu, Jianfeng Sun, Yu Zhou, and De'an Liu "The mechanical design of the large-optics double-shearing interferometer for the test of diffraction-limited wavefront", Proc. SPIE 7091, Free-Space Laser Communications VIII, 70910S (19 August 2008); https://doi.org/10.1117/12.793954

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