Title :
An optimum cut-off frequency of temporal filter and comparison of SN ratio obtained by two types of aperture in optical seeker
Author :
Tsudagawa, Masaru
Author_Institution :
Dept. of Electr. & Electron. Eng., Ritsumeikan Univ., Kyoto, Japan
fDate :
6/24/1905 12:00:00 AM
Abstract :
This paper is described on optical aperture and electrical filter for the optical seeker. Two kinds of optical aperture are compared, that is, single and polarized double slits. In addition, the decision procedure of low-cut-off frequency of used electricity band-pass filter is shown. As a result, the double slit excels the about 1.25 to 2.33 times single slit on the SN ratio.
Keywords :
band-pass filters; object detection; optical filters; optical noise; SN ratio; cut-off frequency; electrical band-pass filter; optical aperture; optical seeker; polarized double slit; single slit; small target detection; temporal filter; Apertures; Background noise; Band pass filters; Cutoff frequency; Infrared detectors; Optical filters; Optical noise; Optical sensors; Tin; Transfer functions;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2002. IMTC/2002. Proceedings of the 19th IEEE
Print_ISBN :
0-7803-7218-2
DOI :
10.1109/IMTC.2002.1007221
