Method and apparatus for a rigid backup light source for down-hole spectral analysis
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United States of America Patent
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Sep 21, 2004
Issued Date -
N/A
app pub date -
Oct 7, 2002
filing date -
May 19, 2000
priority date (Note) -
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Abstract
A rigid redundant light source for obtaining down hole near infrared data in a NIR data acquisition instrument is provided having a plurality of lamps positioned in close proximity and symmetrically about a common optical axis. A lens system for capturing and collimating the light is provided. The structure is arranged and dimensioned so that a single collimating lens can be used for a plurality of light sources. A switch and sensor is provided for turning on an alternate light source when a first light source burns out. A filter is rotated 90 degrees with respect to the light sources to minimized off axis error when switching between light sources.
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