Research on automatic measurement of photoelectric performance for scientific-grade CCD detector

Abstract

To appraise the photoelectric performance of area CCD for the cloud and aerosol polarization camera (CAPC), a kind of general photoelectric parameter automatic measurement apparatus is proposed. The equipment is produced possessing optical electromechanical integrated structure, which is comprised of the illumination assembly, the CCD imaging assembly and the control assembly. The software of large area CCD parameter automatic test system is designed and achieved. It can realize automatic measuring for the key parameters of a great variety of linear or area CCD, including defective pixels, dark current, relative spectral responsivity, saturation grey value, linearity error, etc. The photoelectric parameters and the spectral response of CCD produced by E2V Company are measured and processed. The research results reveal that the dark current is double when the working temperature of CCD is increased by 6℃. The relative spectral response measurement covers the spectral range from visible to near infrared bands and the spectrum resolution is 1 nm. The automatic measurement program can effectively improve the work efficiency approximately one fold and the overall test time is reduced by about one third. The evaluation of the detector performance provides a guarantee for the performance test and calibration requirements of the whole instrument.