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- W2010771587 abstract "A diamond machining facility has been established at British Aerospace capable of generating optical quality surface finishes with a range of rotationally symmetric shapes on a large number of different materials. In particular fresnel lens shapes have been produced on different substrate materials. An investigation into the design and manufacture of fresnel lens forms having constant depth spherical facets has been carried out. Some details of the diamond machining manufacturing process and considerations given to the diamond tool geometry and their design are described. In order to produce flawless lenses the conditions of manufacture are critical. The final lens must be thin enough to obtain adequate transmission in the infra-red and the lens facets must be accurately formed requiring that the material have a good melt flow index. High density polyethylene was chosen as the most suitable material for the manufacture of the fresnel lenses described here. Optical testing and evaluation of the plastic moulded lenses made from the diamond machined metal dies are discussed." @default.
- W2010771587 created "2016-06-24" @default.
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- W2010771587 date "1986-05-01" @default.
- W2010771587 modified "2023-09-23" @default.
- W2010771587 title "<title>Design And Manufacture Of High Quality Plastic Infrared Fresnel Lenses</title>" @default.
- W2010771587 doi "https://doi.org/10.1117/12.951969" @default.
- W2010771587 hasPublicationYear "1986" @default.
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