Accessory and crystalline element for attenuated total reflectio

Details Accessory and crystalline element for attenuated total reflectio Accessory and crystalline element for attenuated total reflectio

1991-07-05

1993-06-01

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250341, 250347, 2503591, 2503601, 356244, G01N 2117, G01N 2155

Patent

active

052162443

ABSTRACT:
The accessary for attenuated total reflection infrared spectroscopy comprises a condenser mirror, a crystalline element, a sample-supporting portion holding the crystalline element, an objective mirror, and a slit. The crystalline element has an incident surface, a totally reflecting surface, and an exit surface. A sample to be investigated is contacted with the totally reflecting surface The focused point of the infrared radiation from the condenser mirror is at the point of measurement on the totally reflecting surface of the crystalline element The focus of the objective mirror can be brought to the point of measurement on the sample surface. A point analysis, line analysis, or area surface on the order of 10 .mu.m can be made while observing the sample with the naked eye with the objective mirror. The invention further includes improvements in the mechanism for automatically adjusting the focus of the objective mirror when the measurement point is changed. Another improvement is that the crystalline element has the reflecting surfaces oriented individually so that the optical axis of the incident radiation rays can agree with the optical axis of the outgoing radiation rays. A further improvement is that a scale for determining a measurement point is engraved on the totally reflecting surface of the crystalline element.

REFERENCES:
patent: 3240111 (1966-03-01), Sherman
patent: 3490847 (1970-01-01), Berz et al.
patent: 3902807 (1975-09-01), Fleming et al.
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patent: 4681451 (1987-07-01), Guerra et al.
patent: 4746179 (1988-05-01), Dahne et al.
patent: 9889427 (1989-12-01), Van Veen et al.
Martin, "Infrared Instrumentation and Techniques", Elsevier Publishing Co., QD 95 M38, 1966, pp. 155-169.

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