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11 August 1995 Variable focus slide projector lens using axial gradient element
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Abstract
Recent advances in macro axial gradient material fabrication, via the diffusion of glass plates, has opened the door to a wide variety of optical design applications incorporating entire lens elements of gradient refractive material. Optical elements, which are made out of macro gradient refractive material, are represented by lines, as opposed to points, of the glass map (nd vs. vd diagram) and thus are of considerable interest to optical designers. Eastman Kodak Co. and Lightpath Technologies entered into a joint venture to redesign and build several prototypes of a commercially available zoom slide projector lens. The goal of this redesign was to keep physical packaging and optical performance the same, while simultaneously removing as many elements as possible. The seven element production lens was redesigned to a five element lens with a single axial gradient meniscus element whose overall index change is 0.15. This paper describes the design, fabrication, and results of this endeavor.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Martin L. Miller and Paul K. Manhart "Variable focus slide projector lens using axial gradient element", Proc. SPIE 2537, Novel Optical Systems Design and Optimization, (11 August 1995); https://doi.org/10.1117/12.216389
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