Measuring minute, local temperature differences

Details Measuring minute, local temperature differences Measuring minute, local temperature differences

1980-12-15

1983-06-28

McGraw, Vincent P.

Optics: measuring and testing

Optical pyrometers

350535, 350334, 350351, 374162, G01J 500, G02F 113

Patent

active

043902758

ABSTRACT:
An object carrier has a transparent plate with an opaque backing and carries a thin liquid crystal layer which, in turn, is covered with a 2 .mu.m glass plate carrying an object (microorganism, etc.). This carrier is placed in a microscope for photographic observation of the temperature-dependent reflectivity of the crystal layer as heat conductively coupled to the object. The average reflection of light by the crystal layer is used as a representation of its average temperature, to control backlighting of the opaque layer to, thereby, stabilize the average object temperature to at least 10.sup.-3 degrees centigrade.

REFERENCES:
patent: 3114836 (1963-12-01), Fergason et al.
patent: 3770961 (1973-11-01), Westell
patent: 3796884 (1974-03-01), Tricoire

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