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US 2009/0153837 A1Published application
Optical power monitor based on thermo-chromic material
AssigneeBWT Property, Inc.
InventorsSEAN XIAOLU WANG, BRIAN PRYOR
Life of this patent
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Abstract
This invention relates to an optical power monitor based on thermo-chromic material. The incident light produces a temperature change in the thermo-chromic material, causing a change in its color which is utilized to monitor the power level of the incident light.
Claims18
A method for monitoring the power level and intensity distribution of a light beam, the method comprising the steps of:
- providing a temperature-sensitive thermo-chromic material, wherein the thermo-chromic material can change color according to a change in temperature;
- causing the light beam to induce a temperature change and a corresponding color change in the thermo-chromic material, wherein the temperature change and the corresponding color change are related to the power level and intensity distribution of the light beam;
- and
- determining the power level and intensity distribution of the light beam through the color change of the thermo-chromic material.
1 more element
A system for monitoring the power level and intensity distribution of a light beam, the system comprising:
- a temperature-sensitive thermo-chromic material, wherein the thermo-chromic material can change color according to a change in temperature;
- means for causing the light beam to induce a temperature change and a corresponding color change in the thermo-chromic material, wherein the temperature change and the corresponding color change are related to the power level and intensity distribution of the light beam;
- and
- means for determining the power level and intensity distribution of the light beam through the color change of the thermo-chromic material.
1 more element
Dependencies are inferred from the claim text.