Development of FOP-HARP imaging device

Kazunori Miyakawa; Yuji Ohkawa; Tomoki Matsubara; Kenji Kikuchi; Siro Suzuki; Kenkichi Tanioka; Misao Kubota; Norifumi Egami; Takuji Atsumi; Shonosuke Matsushita; Taisuke Konishi; Yuzuru Sakakibara; Kazuyuki Hyodo; Yoshimasa Katori; Yoshiaki Okamoto

doi:10.1117/12.838424

25 January 2010 Development of FOP-HARP imaging device

Kazunori Miyakawa, Yuji Ohkawa, Tomoki Matsubara, Kenji Kikuchi, Siro Suzuki, Kenkichi Tanioka, Misao Kubota, Norifumi Egami, Takuji Atsumi, Shonosuke Matsushita, Taisuke Konishi, Yuzuru Sakakibara, Kazuyuki Hyodo, Yoshimasa Katori, Yoshiaki Okamoto

Author Affiliations +

Proceedings Volume 7536, Sensors, Cameras, and Systems for Industrial/Scientific Applications XI; 753604 (2010) https://doi.org/10.1117/12.838424
Event: IS&T/SPIE Electronic Imaging, 2010, San Jose, California, United States

Abstract

The high-gain avalanche rushing amorphous photoconductor (HARP) camera tube achieves ultrahigh-sensitivity by using the avalanche multiplication. The applications of this tube extend beyond broadcasting into other fields. It is attracting a great deal of attention especially for radiation diagnosis, such as synchrotron radiation microangiography, because it can obtain high-resolution and high-contrast images with a low dose of radiation. However, in the present system, a fluorescent screen and the photoconductive film of the HARP tube are connected optically by a lens-coupling method, and low light throughput remains a big problem. To improve the light throughput by using a fiber-coupling method, we applied a fiber-optic plate (FOP) to the substrate of a HARP tube. The FOP consists of three types of glass that have differing hardnesses and elastic coefficients that make it difficult to flatten the FOP surface enough to form the HARP film. We thus introduced a new mechanical polishing method and succeeded in realizing avalanche multiplication in the FOP-HARP tube. The results of shooting experiments by applying the FOP-HARP to the microangiography showed that a spatial resolution of over 20 line pairs/mm was obtained. Moreover, rat femoral arteries of 150-200 μm in diameter could be visualized as motion pictures with a one-fourth lower concentration of contrast material than that needed for ordinary microangiography. Another potential application of the FOP-HARP is an ultrahigh-sensitivity nearinfrared (NIR) image sensor made by fiber-coupling with an image intensifier (I.I.). The image sensor provides highquality images and should be a powerful tool for NIR imaging.

Citation Download Citation

Kazunori Miyakawa, Yuji Ohkawa, Tomoki Matsubara, Kenji Kikuchi, Siro Suzuki, Kenkichi Tanioka, Misao Kubota, Norifumi Egami, Takuji Atsumi, Shonosuke Matsushita, Taisuke Konishi, Yuzuru Sakakibara, Kazuyuki Hyodo, Yoshimasa Katori, and Yoshiaki Okamoto "Development of FOP-HARP imaging device", Proc. SPIE 7536, Sensors, Cameras, and Systems for Industrial/Scientific Applications XI, 753604 (25 January 2010); https://doi.org/10.1117/12.838424

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