Accession Number : ADD003834

Title :   Optical Temperature Probe.

Descriptive Note : Patent,


Personal Author(s) : Rozzell,Thomas C ; Johnson,Curtis ; Durney,Carl ; Lords,James

Report Date : 12 Apr 1977

Pagination or Media Count : 7

Abstract : A temperature probe which measures temperature changes of biological tissue while the tissue is being irradiated with microwaves is described. The temperature probe is completely nonmetallic to minimize perturbation of the microwave field, and the structure of the probe includes a plurality of optic fibers which carry light to and from a reflective liquid crystal film. The liquid crystal is enclosed in a housing at the tip of the probe which is in contact with the biological tissue, and the liquid crystal undergoes changes in absolute reflectance proportional to the temperature changes of the tissue. The optic fibers are gathered in a bundle with a first portion of the bundle transmitting light from a light generation device to the liquid crystal and the remainder of the bundle transmitting reflected from the crystal back to a photo transistor. The reflected light received by the photo transistor is converted into an electrical signal and displayed as a representation of temperature.

Descriptors :   *Patents, *Temperature measuring instruments, *Laboratory equipment, Probes, Tissues(Biology), Irradiation, Microwaves, Electromagnetic radiation

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE