Analysis of Contrast Sensitivity and Spectral Response of Imaging Systems.
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Pagination or Media Count:
The characteristics of imaging systems CID, CCD, and VIDICON were investigated in terms of the contrast sensitivity and the spectral response in the near infrared region. The object distance of 83.5 cm, the radiant flux density of 0.93 microwattscm2 and a black and white bar chart were used for the measurement of CTF. The spectral response was measured at 2520 K using a tungsten light source. The CID image sensor has high sensitivity, resolving capability and spectral response at low light level comparing to the CCD or VIDICON. The limited resolution values of 23.0 line-pairsmm for CCD and 28.4 line-pairsmm for VIDICON, the cutoff wavelengths of 1.0 micrometers for CCD and 0.94 micrometers for VIDICON were determined. The limiting resolution value and the cutoff wavelength for CID were much higher than those of CCD or VIDICON and lay outside the range of this experiment. Keywords include CID, CCD, VIDICON, Noise, Limiting resolution, Contrast sensitivity, and Spectral response.
- Electrooptical and Optoelectronic Devices
- Infrared Detection and Detectors