Current Status Of The 800 X800 Charge-Coupled-Device Image Sensor

Charge-Coupled-Device Charge-Collection Efficiency And The Photon-Transfer Technique

“…The ideal quantum yield i is directly proportional to the photon energy and is found according to the relationship E,, I)i 3.65 (À<1000 A) . (2) As an example of using Eq. (1), assume that an interacting photon generates 1000 e (m), with 200 e lost to recombina-tion and the 800 a remaining (rspe_1) split between and collected by two pixels (1 se_1).…”

“…The fundamental parameters that ultimately limit CCD performance are (1) read noise, (2) charge-transfer efficiency (CTE), (3) quantum efficiency (QE), and (4) charge-collection efficiency (CCE). At their present stage of development, it is possible to fabricate devices that have low read noise (in the 4 to 15 e~ range), excellent CTE performance (<10 e~ deferred charge), and unsurpassed QE performance over the entire spectral range from 1 to 11,000 A.…”

A CCD based focal spot camera

“…We have assumed that the detector system has a linear response over this entire range and this permits the use of simple computer algorithms to eliminate pixel to pixel nonuniformities. The correction process makes use of a dark image (no illumination) and a flat image (uniform illumination) to compensate for background and for fixed pattern noise respectively (Blouke et al 1987). Quantum noise is approximately 2% when computed from a corrected image.…”

<title>Calibration of a 3D data acquistion system using the ratio of two intensity images</title>

“…Being 'mi and 'mj the measured grayscale values, when the light beam with intensity 'c is filtered with two filters whose transmissivities are Ti and Tj, respectively, we have the following equations 'mi = k(IcTi)'( + 'd (12) 'mj = k(IT)Y + 'd (13) from which y can be obtained: y = log ((Im-Id) / (Im-Id)) / log (T/T) (14) It should be noted that the gamma correction factor is needed only when there is any ambient light (eq. Being 'mi and 'mj the measured grayscale values, when the light beam with intensity 'c is filtered with two filters whose transmissivities are Ti and Tj, respectively, we have the following equations 'mi = k(IcTi)'( + 'd (12) 'mj = k(IT)Y + 'd (13) from which y can be obtained: y = log ((Im-Id) / (Im-Id)) / log (T/T) (14) It should be noted that the gamma correction factor is needed only when there is any ambient light (eq.…”