A fundamental method to determine the signal-to-noise ratio (SNR) and detective quantum efficiency (DQE) for a photon counting pixel detector

2006 ◽  
Vol 568 (2) ◽  
pp. 799-802 ◽  
Author(s):  
T. Michel ◽  
G. Anton ◽  
M. Böhnel ◽  
J. Durst ◽  
M. Firsching ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Signal To Noise Ratio ◽  
Photon Counting ◽  
Detective Quantum Efficiency ◽  
Pixel Detector ◽  
Signal To Noise ◽  
Noise Ratio

scholarly journals Remarks on T-Grain Technology Applied to Astrophotography

1984 ◽  
Vol 78 ◽  
pp. 141-142
Author(s):  
Alain Maury
Keyword(s):  
Quantum Efficiency ◽  
Signal To Noise Ratio ◽  
Detective Quantum Efficiency ◽  
Signal To Noise ◽  
Noise Ratio

If T-grain Technology can be used to manufacture emulsions of astrcj nomical type, it will provide a better Detective Quantum Efficiency than any existing plate. As Dr. Millikan explains us, this increase in D.Q.E. can result in an increase in Signal to Noise ratio (i.e. increase in coil trast or decrease in granularity) or in an increase of plate speed. As Kodak and we, their customers, don’t have a lot of money to spend for three or more new emulsions, we have now to choose for a new emulsion, which might be a harder one (more contrast), a finer one (better granularity), or a faster one.

Experimental Method to Measure the Detective Quantum Efficiency of a Charge-Coupled Device Camera for Electron Microscopy.

2000 ◽  
Vol 6 (S2) ◽  
pp. 1134-1135
Author(s):  
P. Favia ◽  
S. Cooper ◽  
P. E. Mooney
Keyword(s):  
Quantum Efficiency ◽  
Signal To Noise Ratio ◽  
Ccd Camera ◽  
Detective Quantum Efficiency ◽  
Signal To Noise ◽  
Electron Dose ◽  
Charge Coupled Device ◽  
Noise Ratio ◽  
A Charge ◽  
Image Position

The Detective Quantum Efficiency (DQE) is one of the best parameters to characterize the performance of a charge-coupled device (CCD) camera when electron dose is an issue. This can be when there are beam source brightness limitations as in high-resolution applications or when specimen dose must be limited. For single parameter detectors such as a backscatter detector in a SEM, the DQE is defined as the square of the signal-to noise ratio (SNR) at the output divided by the square of the signal-to-noise ratio at the input:where S, N, and n are respectively the signal, the noise and the electron dose. This definition is not valid to describe the performance of a multi-component device as an imaging detector. In fact a CCD camera is composed of many elements or pixels.

scholarly journals Three-Dimensional Imaging via Time-Correlated Single-Photon Counting

2020 ◽  
Vol 10 (6) ◽  
pp. 1930
Author(s):  
Chengkun Fu ◽  
Huaibin Zheng ◽  
Gao Wang ◽  
Yu Zhou ◽  
Hui Chen ◽  
...  
Keyword(s):  
3D Imaging ◽  
Single Photon ◽  
Signal To Noise Ratio ◽  
Photon Counting ◽  
Three Dimensional ◽  
Similarity Index ◽  
Signal To Noise ◽  
Single Photon Counting ◽  
Imaging Results ◽  
Noise Ratio

Three-dimensional (3D) imaging under the condition of weak light and low signal-to-noise ratio is a challenging task. In this paper, a 3D imaging scheme based on time-correlated single-photon counting technology is proposed and demonstrated. The 3D imaging scheme, which is composed of a pulsed laser, a scanning mirror, single-photon detectors, and a time-correlated single-photon counting module, employs time-correlated single-photon counting technology for 3D LiDAR (Light Detection and Ranging). Aided by the range-gated technology, experiments show that the proposed scheme can image the object when the signal-to-noise ratio is decreased to −13 dB and improve the structural similarity index of imaging results by 10 times. Then we prove the proposed scheme can image the object in three dimensions with a lateral imaging resolution of 512 × 512 and an axial resolution of 4.2 mm in 6.7 s. At last, a high-resolution 3D reconstruction of an object is also achieved by using the photometric stereo algorithm.

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