This paper reviews electronic materials for invisible image devices up to now. The materials for vidicons, solid-state image devices, and image intensifiers used in infrared rays, ultraviolet rays and X-rays are described and discussed. Author's desiers for the studies on the materials in the feature are also presented.
Improvement of resolution in 64x64 HgCdTe IRCCD image has been achieved with the newly developed micro scanner. The scanner has 2-axial thin prisms and piezoelectric actuators between a lens and the IRCCD. It scans 2x2 points of view in 120 Hz to interpolate the gap of each pixel, and displays 4 times pixel in 30 Hz. NBTD (Noise equivalent Temperature difference) was 0.06 K at this imager.
Schottky barrier infrared CCD image sensor is reviewed. Photo-electron conversion mechanism, its characteristics, and various response improvement methods are explained. Then, newly developed 648x487 pixel Schottky barrier infrared CCD image sensor is shown. It achieves a 40% fill factor of 21x21um size pixel by minimizing vertical CCD region and dead region. Noise equivalent temperature difference (NETD) is 0.1K.
In the distribution of the sea surface radiation measured on the sea thore in the mid-infrared region, the peak value of radiation was observed near the sea line. Spatial distributions ob the radiation were different with the meteorological conditione, but in every case it was confirmed that the peak value near the sea line was observed as the sea line brightening on the thermogram.