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Sensors 2017, 17(3), 483; doi:10.3390/s17030483

The Theoretical Highest Frame Rate of Silicon Image Sensors

1
Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan
2
Graduate School of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 14 January 2017 / Revised: 19 February 2017 / Accepted: 24 February 2017 / Published: 28 February 2017
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [3619 KB, uploaded 1 March 2017]   |  

Abstract

The frame rate of the digital high-speed video camera was 2000 frames per second (fps) in 1989, and has been exponentially increasing. A simulation study showed that a silicon image sensor made with a 130 nm process technology can achieve about 1010 fps. The frame rate seems to approach the upper bound. Rayleigh proposed an expression on the theoretical spatial resolution limit when the resolution of lenses approached the limit. In this paper, the temporal resolution limit of silicon image sensors was theoretically analyzed. It is revealed that the limit is mainly governed by mixing of charges with different travel times caused by the distribution of penetration depth of light. The derived expression of the limit is extremely simple, yet accurate. For example, the limit for green light of 550 nm incident to silicon image sensors at 300 K is 11.1 picoseconds. Therefore, the theoretical highest frame rate is 90.1 Gfps (about 1011 fps) View Full-Text
Keywords: high speed; image sensor; frame rate; temporal resolution limit; BSI high speed; image sensor; frame rate; temporal resolution limit; BSI
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Etoh, T.G.; Nguyen, A.Q.; Kamakura, Y.; Shimonomura, K.; Le, T.Y.; Mori, N. The Theoretical Highest Frame Rate of Silicon Image Sensors. Sensors 2017, 17, 483.

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