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Laser Alignment Tool for Fourier Transform Infrared Spectrometers

IP.com Disclosure Number: IPCOM000050900D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Schlotter, N: AUTHOR

Abstract

An alignment tool is described which provides reproducible positioning of the alignment laser beam for a Michaelson-type interferometer, and which also provides adjustability of the beam direction to compensate for source chamber positioning so that the laser beam traverses the interferometer precisely along its optical axis.

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Laser Alignment Tool for Fourier Transform Infrared Spectrometers

An alignment tool is described which provides reproducible positioning of the alignment laser beam for a Michaelson-type interferometer, and which also provides adjustability of the beam direction to compensate for source chamber positioning so that the laser beam traverses the interferometer precisely along its optical axis.

The alignment tool comprises a generally hollow cylindrical tool housing 10 into which the alignment laser is mounted by means of two adjustable three point pivots 12. The three point pivots permit the axis of the laser to be adjusted relative to tool housing 0. The lower part of the tool housing comprises an outer threaded cylindrical member 14 and a vertical positioning ring 16. A small mirror 18 is fixed in position at an angle of 450 to the axis of the tool.

In operation, the tool is placed in the source chamber, and the three point pivots 12 and the positioning ring 16 are adjusted so that the beam from the alignment laser traverses the interferometer precisely along its optical axis. Locking ring 22 is then tightened to positioning ring 16 to hold this position. If the interferometer is to be aligned for maximum interference, then diverging lens 24 is inserted into the head of the tool. If the optical axis of the interferometer is to be found, the diverging lens is not used.

After alignment of the laser with the optical axis of the spectrometer, the tool can be used with...