Ms. Yajing Wang Profile

Yajing Wang

at Shanghai Institute of Technical Physics

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Publications (2)

Proceedings Article | 11 September 2013 Paper

The optical axis optimization in measurement of decentration of lens

Yajing Wang, Lin Yang, Chunyu Wang

Proceedings Volume 8907, 89074D (2013) https://doi.org/10.1117/12.2034720

KEYWORDS: Optical testing, Tolerancing, Error analysis, Mirrors, Optical spheres, Imaging systems, Spherical lenses, Optical alignment, Charge-coupled devices, Optical fabrication

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Proceedings Article | 11 September 2013 Paper

Assembly and alignment of infrared refractive system

Lin Yang, Jian-chun Lin, Ya-jing Wang, Fan-sheng Chen

Proceedings Volume 8907, 89072U (2013) https://doi.org/10.1117/12.2033165

KEYWORDS: Infrared imaging, Relays, Optical alignment, Assembly tolerances, Imaging systems, Tolerancing, Cameras, Optics manufacturing, Infrared cameras, Infrared radiation

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Optical systems for scientific instrumentation frequently include lens or mirrors with critical mechanical requirements. Position issues of those components are inextricably bound to the efficiency of the instrument. The position referring to the lens system mainly means spacer and rotation of all elements concerned. Instrument could not be completed without the accuracy assembly even the previous design was top one. The alignment of infrared optical system always is a tough thing due to the IR material being opaque to visible light which hardly effect on the imaging ability of the system. In this paper a large-aperture IR refractive system was described in details and the alignment of this system was presented. The brief work describes the assembly and integration of the camera barrel in lab. First of all, all the mechanical elements must be manufactured with high accuracy requirements to meet alignment tolerances and minimum errors mostly could be ignored. The rotations relative to the optical axis were hardy restricted by the space between barrel and cells. The lens vertex displacements were determined through high accuracy titanium alloy spacer. So the actual shape data of the optical lenses were obtained by coordinate measuring machining (CMM) to calculate the real space between lenses after alignment1 done. All the measured results were critical for instruction of the practical assemble. Based on the properties and tolerances of the system, the camera barrel includes sets of six lenses with their respective supports and cells which are composed of two parts: the flied lens group and the relay lenses group. The first one was aligned by the geometry centering used CMM. And the relay lenses were integrated one by one after centered individually with a classical centering instrument. Then the two separate components were assembled under the monitor of the CMM with micron precision. Three parameters on the opti-mechanical elements which include decenter, tilt and space changing along the optical axis were measured and determined the relative position of the two components. Finally, the integrated system was verified and results showed that alignment met the design requirement.

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