Optical Design of Compact Space Autonomous Docking Instrument with CMOS Image Sensor and All Radiation Resistant Lens Elements

Sheng-Feng Lin, Cheng-Huan Chen

Research output: Contribution to journalArticle

Abstract

Built-in autonomous stereo vision devices play a critical role in the autonomous docking instruments of space vehicles. Traditional stereo cameras for space autonomous docking use charge-coupled device (CCD) image sensors, and it is difficult for the overall size to be reduced due to the size of the CCD. In addition, only the few outermost elements of the camera lens use radiation-resistant optical glass material. In this paper, a complementary metal-oxide semiconductor (CMOS) device is used as the image sensor, and radiation-resistant optical glass material is introduced to all lens elements in order to make a compact and highly reliable space grade instrument. Despite the limited available material, a fixed focus module with 7 lens elements and overall length of 42 mm has been achieved, while meeting all the required performance demands for the final vision-guided docking process.

Original languageEnglish
Article number5302
Number of pages8
JournalApplied sciences-Basel
Volume10
Issue number15
DOIs
StatePublished - Aug 2020

Keywords

  • radiation resistant
  • autonomous stereo vision device
  • rendezvous instruments
  • space autonomous docking instrument
  • depth of field (DOF)
  • optical glass chart
  • temperature coefficient of refractive index
  • hyperfocal distance
  • coefficient of thermal expansion (CTE)
  • complementary metal-oxide semiconductor (CMOS) image sensors (CIS)

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