Open AccessAnalysis and simulation of the phenomenon of secondary spots of the TDI CCD camera irradiated by CW laser
Author(s) -
Kai Sun,
Liangjin Huang,
Xin Cheng,
Houman Jiang
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.023901
Subject(s) - optics , spots , laser , scattering , reflection (computer programming) , ray tracing (physics) , slit , stray light , irradiation , materials science , physics , chemistry , computer science , nuclear physics , programming language
The phenomenon of secondary spots is observed in the experiment of TDI CCD camera irradiated by CW He-Ne laser. It is considered to be related to the scattering of the slit in front of the sensor and the reflection of the window of the TDI CCD chip. Additional experiments and ray tracing simulation are performed to study the mechanism of the secondary spots. The experimental and simulated results demonstrated that the scattering of the side walls of the slit is the main source of the secondary spots. Furthermore, the operation mode of rotary scanning provides the chance of scattering incident beam to the side wall of the slit. This paper will provide a preliminary hint to the optimum design of slit in camera to reduce the effects of the secondary spots to the image quality.