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Ultra-High-Sensitivity New Super-HARP Pickup Tube and Its Camera
Kenkichi TANIOKA Tomoki MATSUBARA Yuji OHKAWA Kazuhiro MIYAKAWA Shiro SUZUKI Tamotsu TAKAHATA Norifumi EGAMI Koichi OGUSU Akira KOBAYASHI Tadaaki HIRAI Toshiaki KAWAI Masanori HOMBO Tetsuo YOSHIDA
IEICE TRANSACTIONS on Electronics
Publication Date: 2003/09/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section INVITED PAPER (Special Issue on Recent Progress in Photon Detection Technology)
HARP, pickup tube, high sensitivity, imaging device, amorphous selenium, avalanche multiplication,
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We have developed an ultrahigh-sensitivity "New Super-HARP" handheld camera, which has a sensitivity that is about 100 times as great as that of a CCD camera. The sensitivity of TV cameras is determined by the performance of the imaging device. We developed the world's first imaging device that achieves high sensitivity and high picture quality by using the avalanche multiplication phenomenon in an amorphous selenium photoconductive target. This "Super-HARP" pickup tube, which has already been used in TV production, has a selenium target 8-µm thick. It is about 10 times as sensitive as CCDs. We have now developed a greatly improved version of the Super-HARP tube with a target 25-µm thick. This improved version, called the New Super-HARP pickup tube, is about 10 times as sensitive as the Super-HARP pickup tube. The New Super-HARP handheld camera equipped with the new tubes has a maximum sensitivity of 11 lx at F8. This camera is a powerful tool for reporting breaking news at night and other low-light conditions, the production of scientific programs, and numerous other applications.