Optical System Measuring Thermomechanical Response to Heating

A thermomechanical heating response testing system and methods of performing a thermomechanical test on a sample are presented.  A thermomechanical heating response testing system comprises a dichroic mirror configured to combine beams from a plurality of lasers, an objective immediately following the dichroic mirror, the plurality of lasers, and a multichannel lock-in amplifier configured to receive input from a thermal probe detector configured to receive a thermal probe sample beam of the thermal probe laser reflected from a sample and a mechanical probe detector configured to receive a mechanical probe sample beam of the mechanical probe laser reflected from the sample.  The objective is configured to focus the beams of the plurality of lasers in a coaxial configuration on a sample.  The plurality of lasers comprises a heating laser having a first wavelength, a thermal probe laser having a second wavelength, and a mechanical probe laser having a third wavelength.

Application No. 19/201,542

Application Date 05/07/2025

Date Added to Site: 3/24/2026

This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.