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Fabrication and Testing of Miniature Automatic Photophoretic Trapping Rigs
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Testing optics by experimental ray tracing with a lateral effect photodiode.

G Häusler, G Schneider

    Applied Optics
    |June 12, 2010
    PubMed
    Summary
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    This study introduces experimental ray tracing for testing optics and objects. This laser-based method accurately measures optical shapes, including complex aspheres and windshields.

    Area of Science:

    • Optical engineering
    • Metrology
    • Materials science

    Background:

    • Accurate optical testing is crucial for high-performance systems.
    • Existing methods may struggle with complex geometries like aspheric lenses.

    Purpose of the Study:

    • To present a novel experimental ray tracing technique.
    • To demonstrate its application in testing optics and 3D shape measurement.

    Main Methods:

    • Utilizing a laser beam and a lateral effect photodiode to track beam propagation.
    • Employing a modified Hartmann test by measuring beam position in two planes.
    • Generating spot diagrams for optical analysis.

    Main Results:

    • Successfully demonstrated experimental ray tracing for optical testing.

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  • Validated the method's suitability for strong aspheric optics.
  • Achieved 3D shape measurement of nonplanar glass plates, such as automotive windshields.

    • Conclusions:

    • Experimental ray tracing offers a versatile and accurate method for optical component evaluation.
    • The technique is effective for complex optical surfaces and 3D metrology applications.