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Illumination-apparatus

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Illumination apparatus

Details

Inventors: Bloemendaal, John F.; Boone, Arthur M.; Zanolli, Alexander B.;
Assignee: Eastman Kodak Company (Rochester, NY)
Primary Examiner: Hayes; Monroe H.
Assistant Examiner:
Attorney, Agent or Firm: Woods; D. M.

Illumination apparatus provides for uniform illumination of a planar original by use of a single flash lamp. A pair of parabolic reflectors partially surround the lamp and direct two separate collimated bundles of light toward opposite sides of the original. A planar reflector positioned in the path of each collimated bundle of light intercepts and reflects the collimated light rays upon the original to uniformly illuminate the original from opposite sides.

DETAILED DESCRIPTION Illumination apparatus is provided for illuminating an object with light rays from an elongated light source.
The object is supported in spaced relationship with the light source to receive the light rays.
Means are included for collimating some of the light rays originating from the source and directing these collimated rays along a predetermined path.
Reflecting means are positioned in the predetermined path for reflecting the collimated light rays to the object to illuminate the object.
More particularly, a pair of parabolic reflecting surfaces are positioned parallel to and adjacent the light source.
Each parabolic reflector collimates and reflects some light rays from the source along respective predetermined paths on opposite sides of a planar object.
A pair of planar reflecting surfaces are positioned in the respective paths to receive light reflected from the parabolic reflectors and to reflect the light rays upon the object from opposite sides.
The illumination apparatus is also provided for illuminating the surface of an object positioned in the optical axis of a photographic printer.
The light source is supported in spaced relationship with the object and clear of the printing axis.
A pair of planar reflectors at opposite sides of the object reflect light rays originating from the source directly upon the object.
Two elongated parabolic reflectors are positioned substantially parallel to and adjacent opposite sides of the light source to reflect respective bundles of light rays from each parabolic reflector toward respective of the planar reflectors.
The illumination apparatus of the photographic printer may also include a light baffle positioned between the light source and the object to substantially prevent light rays from passing directly between the source and the object.
A light filter is additionally provided between the parabolic reflectors and the object to modify the spectral characteristic of substantially all of the light rays in the respective bundles of reflected rays

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