Precision absolute positional measurement of laser beams.

Area of Science:

• Optical Engineering
• Metrology
• Laser Physics

Background:

• Precise characterization of laser beam propagation is crucial for various scientific and industrial applications.
• Existing methods for measuring beam direction may lack the required accuracy for demanding applications.

Purpose of the Study:

• To introduce and validate a novel instrument for the absolute measurement of laser beam propagation direction.
• To achieve high accuracy in both positional and angular measurements of millimeter-scale laser beams.

Main Methods:

• Development of a specialized instrument designed for integration with coordinate measuring machines.
• Utilizing a coordinate measuring machine to perform absolute measurements within the instrument's frame.
• Characterization of millimeter-scale laser beam propagation parameters.

Main Results:

• The instrument facilitates absolute measurement of laser beam propagation direction within the machine frame.
• Achieved accuracy of approximately ±4 μm in position.
• Achieved accuracy of approximately ±20 μrad in angle.

Conclusions:

• The described instrument offers a significant improvement in the accuracy of laser beam propagation direction measurements.
• This technology has potential applications in fields requiring high-precision optical alignment and characterization.