Lens system for microfiche duplicators

Details Lens system for microfiche duplicators Lens system for microfiche duplicators

1978-04-06

1983-01-04

Stern, Ronald J.

Illumination

Elongated source light unit or support

With or including transparent or translucent member

350167, 362 97, 362225, 362260, F21S 300, F21V 504, G02B 2730

Patent

active

043675182

ABSTRACT:
In an apparatus capable of duplicating jacketed and unjacketed microfiche, a bank of clear cylindrical lenses is provided, each lens being divided into segments by a series of substantially opaque baffles. The lenses are used with a corresponding bank of aperture lamps, and are disposed between the lamps and microfiche to provide relatively uniform, collimated light upon an image plane, the side of the lenses closest to the microfiche being flattened, and the baffles having an index of refraction lower than that of the clear segments of the lens.

REFERENCES:
patent: 2434049 (1948-01-01), Nordquist
patent: 3060789 (1962-10-01), Hicks
patent: 3560084 (1971-02-01), Limberger
patent: 3669789 (1972-06-01), Utsugi et al.

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