15 November 1994 Profiling of aspherical surfaces using moire deflectometry
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Proceedings Volume 2248, Optical Measurements and Sensors for the Process Industries; (1994); doi: 10.1117/12.194310
Event: Optics for Productivity in Manufacturing, 1994, Frankfurt, Germany
Abstract
An elegant measuring setup for contouring strong aspherical surfaces is introduced. Moire deflectometry is chosen as the measuring method because the configuration is simple, robust, and variable in sensitivity. The instrument is capable of measuring height deviations between an aspherical surface and its best fitting sphere ranging from minimally 1 micrometers to maximally 30 micrometers with a relative accuracy of 10%, which is useful for the production of surfaces in infrared optics. It is possible to measure transparent as well as reflecting surfaces, both convex and concave. A CCD-camera and a PC make part of the setup to automate the measurements. The short measurement time of less than 60 seconds makes the instrument useful in the manual production of aspherical surfaces.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. Uitterdijk, Hans Jan Frankena, Kees Smorenburg, "Profiling of aspherical surfaces using moire deflectometry", Proc. SPIE 2248, Optical Measurements and Sensors for the Process Industries, (15 November 1994); doi: 10.1117/12.194310; https://doi.org/10.1117/12.194310
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KEYWORDS
Moire patterns

Surface finishing

Binary data

Collimation

Polishing

Spherical lenses

Image processing

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