Ultrahigh-sensitivity HDTV new super-HARP camera

Kazunori Miyakawa; Yuji Ohkawa; Tomoki Matsubara; Tamotsu Takahata; Shiro Suzuki; Misao Kubota; Norifumi Egami; Kenkichi Tanioka; Kouichi Ogusu; Akira Kobayashi; Tadaaki Hirai; Toshiaki Kawai; Masanori Hombo; Tetsuo Yoshida

doi:10.1117/12.585434

7 March 2005 Ultrahigh-sensitivity HDTV new super-HARP camera

Kazunori Miyakawa, Yuji Ohkawa, Tomoki Matsubara, Tamotsu Takahata, Shiro Suzuki, Misao Kubota, Norifumi Egami, Kenkichi Tanioka, Kouichi Ogusu, Akira Kobayashi, Tadaaki Hirai, Toshiaki Kawai, Masanori Hombo, Tetsuo Yoshida

Author Affiliations +

Proceedings Volume 5677, Sensors and Camera Systems for Scientific and Industrial Applications VI; (2005) https://doi.org/10.1117/12.585434
Event: Electronic Imaging 2005, 2005, San Jose, California, United States

Abstract

We developed an ultrahigh-sensitivity camera tube with a 15-μm-thick high-gain avalanche rushing amorphous photoconductor (HARP) film and applied it to an HDTV camera. The camera, called the "New Super-HARP", can achieve about 30 times the sensitivity (62.5 lux, F10) of conventional HDTV CCD cameras. Furthermore, for slow-moving subjects, the camera can dramatically increase the sensitivity in the intermittent read-out mode (for an accumulation time of 4 seconds, about 240 times the sensitivity of a New Super-HARP camera under normal operations). The very-low-dark-current feature of the HARP film results in excellent video images without any fixed pattern noise. We investigated the relationship between the operating temperature of the film and the occurrence of highlight defects in 15-μm-thick HARP films when shooting fixed, strong spot-lights directly. We found that defects could be suppressed by shifting the operating temperature to 35°C from the conventional 25°C. Furthermore, we optimized the concentration of arsenic (As) doped in the film to improve the heat resistance so that the film could be used at temperatures as high as 35°C. Ultrahigh-sensitivity imaging technology using HARP has been attracting considerable interest from many fields outside of broadcasting, such as medicine, biology, and digital film production.

Citation Download Citation

Kazunori Miyakawa, Yuji Ohkawa, Tomoki Matsubara, Tamotsu Takahata, Shiro Suzuki, Misao Kubota, Norifumi Egami, Kenkichi Tanioka, Kouichi Ogusu, Akira Kobayashi, Tadaaki Hirai, Toshiaki Kawai, Masanori Hombo, and Tetsuo Yoshida "Ultrahigh-sensitivity HDTV new super-HARP camera", Proc. SPIE 5677, Sensors and Camera Systems for Scientific and Industrial Applications VI, (7 March 2005); https://doi.org/10.1117/12.585434

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available