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19 August 1996 New edge-blackening techniques for refractive optical elements
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There is a trend in the optical industry to automate the edge-blackening of optical components. The goal of edge- blackening is to coat the areas outside the functional region of optical components, namely the peripheral areas including the surface edge or 'diaphragm' and apertures, with light absorbing, index-matched material to minimize scattering light. The common method today is the manual application with brush or ink-writer of quick-drying liquid pigmented synthetic resin. The lenses are fitted at a rotary table with a vacuum-pump or with considerable disadvantage inhibiting the automation. Another problem is the use of a high number of lacquers with different or partly unknown properties, due to varying chemical bases.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ramona Eberhardt, A. Gebhardt, C. Weber, Stefan Risse, and Volker Guyenot "New edge-blackening techniques for refractive optical elements", Proc. SPIE 2775, Specification, Production, and Testing of Optical Components and Systems, (19 August 1996);

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