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Cylindrical quasi-cavity waveguide for static wide angle pattern projection.

Kaveh Sahba, Kamal E Alameh, Clifton L Smith

|June 18, 2009

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This study introduces a novel static laser spot array projector that overcomes electro-mechanical issues common in beam deflection systems. This innovation enhances laser scanning performance and optical sensing applications.

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Area of Science:

Optics and Photonics
Optical Engineering

Background:

Traditional beam deflection methods (rotary mirrors, motorized heads) face electro-mechanical challenges like wobble, jitter, and wear, impacting laser scanning.
These issues limit performance and reliability in optical sensing devices.

Purpose of the Study:

To demonstrate a novel optical structure for static projection of laser spot arrays.
To model and validate the performance of this new projection method.

Main Methods:

Development of a unique optical structure with concentric, cylindrical interfaces and specialized coatings.
Modeling of ray trajectories using linear equations and spot size growth with ray transfer matrices for tilted optical elements.
Experimental validation using measurements of 20 transmitted laser beams.

Main Results:

The novel structure enables static projection of laser spot arrays over a wide angle.
The developed model accurately predicts spot size growth, validated by experimental data.
The system demonstrates potential for reliable laser footprint projection.

Conclusions:

The novel optical structure provides a robust alternative to conventional beam deflection systems.
This technology can be integrated into optical sensing devices requiring multiple laser footprints.
The static projection method offers improved stability and performance for laser scanning applications.