Design for transmissive differential image motion seeing monitor system

Lun Jiang; Xing Zhao; Shou Feng Tong; Lun Wang

doi:10.1117/12.2034626

16 August 2013 Design for transmissive differential image motion seeing monitor system

Lun Jiang, Xing Zhao, Shou Feng Tong, Lun Wang

Proceedings Volume 8912, International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications; 89121A (2013) https://doi.org/10.1117/12.2034626
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

A Transmissive differential image motion monitor (DIMM) optical system is introduced, which composed of two identical transmissive optical systems. This two transmissive optical system is composed of two pupil required by DIMM. Compared with traditional reflective DIMM optical system, this new type of DIMM system has a simple structure, small size, light weight, easy assembly and adjustment, easy to carry, is more suitable for field work. In order to satisfy the requirement of observation both at daytime and night .we use cut-off filter in this system to separate the bright sky background from the small stellar target an. Then the system can work throughout the day and night without interrupt. The spectral bandwidth of the final design is 650nm-880nm, pupil diameter is 100mm, and focal length is 2300mm, the design result reveals that the image quality is good; the strehl ratio is above 0.4 after tolerances allocate, which can meet the system requirements. The system can detect star above 4 magnitude in the day time, which can meet the requirements of the system observation at daytime and night.

Citation Download Citation

Lun Jiang, Xing Zhao, Shou Feng Tong, and Lun Wang "Design for transmissive differential image motion seeing monitor system", Proc. SPIE 8912, International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications, 89121A (16 August 2013); https://doi.org/10.1117/12.2034626

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KEYWORDS

Stars

Image quality

Motion measurement

Observatories

Signal to noise ratio

Telescopes

Astronomical telescopes

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