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Browse Prior Art Database

Microscopic IRFT Detector

IP.com Disclosure Number: IPCOM000049763D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Natter, WJ: AUTHOR

Abstract

A detection system 1ver designed for use with an infrared Fourier Transform (IRFT) spectrometer to enable the analysis of samples as small as 25 microns. The detection system 1 is operable in both a transmittance mode, shown in full lines in the drawing, and a reflectance mode, shown in dotted lines.

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Microscopic IRFT Detector

A detection system 1ver designed for use with an infrared Fourier Transform (IRFT) spectrometer to enable the analysis of samples as small as 25 microns. The detection system 1 is operable in both a transmittance mode, shown in full lines in the drawing, and a reflectance mode, shown in dotted lines.

Detection system 1 includes a cryogenic detector 2 connected through a light pipe 3 to a movable reflecting microscope objective
4. Collimated light from a Michaelson Interferometer passes through a second reflecting microscope objective 5 and is focused to a small spot on the sample. Dectector 2, light pipe 3 and objective 4 are movable as a unit between the different positions for operation in two different modes. The advantages of the invention are:

1. Diffuse reflective measurements can be made on

microscopic samples with the sensitivity

of a cryogenic detector and the advantages of

of the IRFT.

2. Both reflectance and transmittance measurements can be

made using the same optical components.

3. An operator is able to visually align the sample on the

detection system 1 outside of a spectrometer

using a microscope eyepiece.

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