Absorbance, turbidimetric, fluorescence and nephelometric photometer
First Claim
1. In a multi-function photometer having a sample cell for containing a liquid to be measured, a grating, an array of photodiodes, and a source of radiation directed along a first axis through the cell to the grating for dispersing the radiation according to wavelength onto respective different ones of the photodiodes, thereby to provide output signals corresponding to the intensity of radiation at each wavelength, the improvement wherein the sample cell defines an exit aperture perpendicular to the first axis, the exit aperture being positioned to be the entrance aperture for the grating.
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Abstract
An absorbance, turbidimetric, fluorescence, and nephelometric photometer is constructed by providing a sample cell having a rectangular absorbance/turbidimetric cross-section for radiation. The cells exit aperture is positioned to be the entrance aperture for a grating which separates the light according to wavelength and impingement on an array detector.
156 Citations
10 Claims
- 1. In a multi-function photometer having a sample cell for containing a liquid to be measured, a grating, an array of photodiodes, and a source of radiation directed along a first axis through the cell to the grating for dispersing the radiation according to wavelength onto respective different ones of the photodiodes, thereby to provide output signals corresponding to the intensity of radiation at each wavelength, the improvement wherein the sample cell defines an exit aperture perpendicular to the first axis, the exit aperture being positioned to be the entrance aperture for the grating.
Specification