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Spectrophotometer Light Source with IR Rejection

IP.com Disclosure Number: IPCOM000069565D
Original Publication Date: 1978-May-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Galm, DC Mathisen, ES Pillus, CA Thorp, LD [+details]

Abstract

The drawing shows a light source 1 for use in a spectrophotometer, where the principal elements are shown in full line and the supporting structure is shown dotted. A tungsten-halogen lamp 2 is mounted within an elliptical reflector 3, directing a cone of light upon a dichroic beam splitter 4. This splitter allows the IR (infrared) to pass through it to thereby reject such energy or prevent it from entering into the fiber optics discussed below. The remaining part of the light from lamp 2 is reflected from the beam splitter 4, and is directed onto a glass splitter 5 which allows part of the light to pass through towards a fiber-optic bundle 6. The other part of the light is reflected from splitter 5, and is directed towards a fiber-optic bundle 7.