Accession Number : ADA194501

Title :   Binning Spectral Images in a Charge-Coupled Device (CCD).

Descriptive Note : Technical rept.,

Corporate Author : ARIZONA UNIV TUCSON DEPT OF CHEMISTRY

Personal Author(s) : Epperson, Patrick M ; Denton, M B

PDF Url : ADA194501

Report Date : 04 Feb 1988

Pagination or Media Count : 41

Abstract : A charge coupled device (CCD) can selectively combine photogenerated charge from several detector elements into a single charge packet by a charge readout mode called binning. This article focuses on the use of charge binning in a two dimensional CCD for increasing the sensitivity and dynamic range of spectroscopic measurements. Binning allows the effective detector element size to be matched to the size of the slit image. Equations describing the signal to noise ration and dynamic range of the binned readout of spectral lines are developed. Results of binning to increase the sensitivity of atomic emission and molecular fluorescence measurements are presented. An intraspectral dynamic range of 500,000 is achieved by mixing binned and normal readout modes of a Hg atomic emission spectrum. Practical factors related to binning spectral images including spectral line orientation, readout speed, and blooming are discussed. Keywords: Charge coupled device; Multichannel detectors; Binning; Dynamic range; Spectroscopic performance; Mercury.

Descriptors :   *CHARGE COUPLED DEVICES, *DETECTORS, DYNAMIC RANGE, EMISSION SPECTRA, EQUATIONS, FLUORESCENCE, IMAGES, MEASUREMENT, MERCURY, MOLECULES, MULTICHANNEL, NUCLEAR RADIATION, ORIENTATION(DIRECTION), RATIONS, SENSITIVITY, SIGNAL TO NOISE RATIO, SIZES(DIMENSIONS), SPECTRA, SPECTRAL LINES, SPECTROSCOPY

Subject Categories : Electrical and Electronic Equipment
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE