Linear light source for a film scanner

Details Linear light source for a film scanner Linear light source for a film scanner

1995-04-13

1996-10-15

Grimley, Arthur T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 71, 355 35, G03B 2772, G03B 1504

Patent

active

055659586

ABSTRACT:
A linear light source includes: a lamp for producing a beam of light; a cylindrical integrating cavity having an entry port for introducing the beam of light into the cylindrical integrating cavity and a linear slot parallel to the cylindrical axis of the integrating cavity for emitting a line of diffuse light that is uniform over an angular range; and an optical element aligned with the slot for reducing the angular divergence of the light exiting from the slot.

REFERENCES:
patent: 4868383 (1989-09-01), Kurtz et al.
W. T. Welford and R. Winston, "High Collection Nonimaging Optics", 1989, Academic Press, pp. 53-73.

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