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Adjustable contrast optical target device for test of acquisition of photoelectric theodolite

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Abstract

A new device used to detect the low contrast target acquisition of photoelectric theodolite is designed and its reliability is experimentally demonstrated. The adjustable contrast optical target device, which can simulate the sky background luminance and a low contrast target, is established. It utilizes a big integrating sphere and a small one to simulate the luminance of the background and target respectively. Importantly, by controlling the luminous flux of the two integrating spheres, the targets and background radiance can be continuously adjustable under the condition of constant color temperature. Thus, the contrast can be controlled continuously in the range of 0%–90% and its stability is better than 1%. The biggest background luminance exceeds 60 W m-2 str-1 in the spectral range of 400–800 nm.

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Authors and Affiliations

  1. School of Computer Science and Information Technology, Northeast Normal University, Changchun, 130033, China

    XiaoXin Sun

  2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China

    XiangHeng Shen, SuHua Wang & Lu Ye

  3. University of Chinese Academy of Sciences, Beijing, 100049, China

    SuHua Wang

  4. School of Information Technology, Changchun Vocational Institute of Technology, Changchun, 130033, China

    SuHua Wang

Authors
  1. XiaoXin Sun
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  2. XiangHeng Shen
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  3. SuHua Wang
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  4. Lu Ye
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Correspondence to XiaoXin Sun.

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Sun, X., Shen, X., Wang, S. et al. Adjustable contrast optical target device for test of acquisition of photoelectric theodolite. Sci. China Technol. Sci. 56, 2052–2058 (2013). https://doi.org/10.1007/s11431-013-5282-6

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  • DOI: https://doi.org/10.1007/s11431-013-5282-6

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