Patent ID: 11913830
Assignee: NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A laser absorptivity measurement device, comprising:
an optical configuration, comprising
a linearly polarized incident beam,
an internal polarizing beamsplitter that transmits the linearly polarized incident beam, and
a quarter-wave plate that converts the linearly polarized incident beam into a circularly polarized incident beam;

an integrating volume comprising a photodetector; and
a processing substrate that reflects and thereby reverses the handedness of at least a portion of the circularly polarized incident beam, resulting in a reverse circularly polarized reflected light;
wherein the reverse circularly polarized reflected light passes back through the quarter-wave plate and is converted into a linearly polarized reflected light having linear polarization orthogonal to that of the linearly polarized incident beam, wherein the linearly polarized reflected light passes back into the internal polarizing beam splitter and is reflected into the integrating volume, wherein the power of the linearly polarized reflected light is measured by the photodetector.