Focal plane splicing and registration method of multispectral detectors with large field of view

Hui Zhong; Yue Guo M.D.; Jing Wang M.D.; Yezhi Zhang

doi:10.1117/12.2606240

24 November 2021 Focal plane splicing and registration method of multispectral detectors with large field of view

Hui Zhong, Yue Guo M.D., Jing Wang M.D., Yezhi Zhang

Proceedings Volume 12069, AOPC 2021: Novel Technologies and Instruments for Astronomical Multi-Band Observations; 120690L (2021) https://doi.org/10.1117/12.2606240
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

Due to the limitation of the existing technology and raw materials, the length of a single CCD and the number of spectral segments that can be integrated on a single CCD are all limited. The optical splicing method of all reflection and all transmission is usually used. In order to increase the number of spectral segments, the focal plane is usually divided into multiple channels by using a spectroscope. To avoid the introduction of the beam splitting components, a splicing and registration method of multispectral focal plane is proposed. First of all, the method and principle of optical splicing and registration are analyzed. Then the form of nine segments focal plane is designed. A single 4-band detector and a single 5-band detector are assembled into a 9-band focal plane according to the field splicing method, and then multiple 9-band focal planes are assembled into a 9-band long linear array focal plane. And the corresponding multi-segment light source is designed in combination with the existing splicing equipment. The light source can not only realize the convenient switching of multiple spectral segments, but also improve the image brightness and detail resolution. Finally, the splicing test of nine segments is carried out and test results are given: the straightness of focal plane splicing is 1.0μm, the coplanar accuracy is 7μm, and the multispectral registration accuracy is 0.5μm, which is equivalent to that of single four and five segment splicing focal plane. The results show that the method is reasonable and feasible, and the accuracy meets the acquirements.

Citation Download Citation

Hui Zhong, Yue Guo M.D., Jing Wang M.D., and Yezhi Zhang "Focal plane splicing and registration method of multispectral detectors with large field of view", Proc. SPIE 12069, AOPC 2021: Novel Technologies and Instruments for Astronomical Multi-Band Observations, 120690L (24 November 2021); https://doi.org/10.1117/12.2606240

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KEYWORDS

Sensors

Cameras

Charge-coupled devices

Image registration

Image segmentation

Light sources and illumination

Staring arrays

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