Photon detection with CMOS sensors for fast imaging
Photon detection with CMOS sensors for fast imaging
复制标题
使用 CMOS 传感器进行光子检测，实现快速成像
DOI：
10.1016/j.nima.2009.01.066
复制
发表时间：
2009
影响因子：
1.4
通讯作者：
N. Estre
中科院分区：
文献类型：
--
作者：
J. Baudot;W. Duliński;M. Winter;R. Barbier;E. Chabanat;P. Depasse;N. Estre
Pixel detectors employed in high energy physics aim to detect single minimum ionizing particle with micrometric positioning resolution. Monolithic CMOS sensors succeed in this task thanks to a low equivalent noise charge per pixel of around 10 to 15 e−, and a pixel pitch varying from 10 to a few 10s of microns. Additionally, due to the possibility for integration of some data treatment in the sensor itself, readout times of 100μs have been reached for 100kilo-pixels sensors. These aspects of CMOS sensors are attractive for applications in photon imaging. For X-rays of a few keV, the efficiency is limited to a few % due to the thin sensitive volume. For visible photons, the back-thinned version of CMOS sensor is sensitive to low intensity sources, of a few hundred photons. When a back-thinned CMOS sensor is combined with a photo-cathode, a new hybrid detector results (EBCMOS) and operates as a fast single photon imager. The first EBCMOS was produced in 2007 and demonstrated single photon counting with low dark current capability in laboratory conditions. It has been compared, in two different biological laboratories, with existing CCD-based 2D cameras for fluorescence microscopy. The current EBCMOS sensitivity and frame rate is comparable to existing EMCCDs. On-going developments aim at increasing this frame rate by, at least, an order of magnitude. We report in conclusion, the first test of a new CMOS sensor, LUCY, which reaches 1000frames per second.
