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CH664225A5
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Device for detecting optical characters on a film carrier relatively moving to the device.
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JPS51135532A
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Reader for reading micro image on micro slide
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GB1539219A
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Optical illumination systems
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GB1537341A
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Optical projectors
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US3302515A
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Projection apparatus or system provided with concave reflector
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CH405752A
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Device for evenly illuminating a surface, in particular for reproduction purposes, as well as method for producing the device
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US3263584A
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Appliance for illuminating and photographing a surface of an object with reflecting areas
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US3194113A
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Optical viewing apparatus with a projection screen
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