Integrating cylinder with end input illumination for use as an i

Details Integrating cylinder with end input illumination for use as an i Integrating cylinder with end input illumination for use as an i

1992-06-01

1993-08-31

Dority, Carroll B.

Illumination

Light source and modifier

Including reflector

250228, 250349, F21V 700

Patent

active

052414590

ABSTRACT:
An integrating cylinder for use as an illuminator for a film scanner includes a hollow cylinder including an inner surface defining a cavity therein and an outer surface, a diffusing layer of reflective material covering an inner surface of the hollow cylinder, a first end plate for sealing a near end of the hollow cylinder, and a second end plate for sealing a far end of the hollow cylinder opposite the near end. The hollow cylinder defines a slit formed parallel to a longitudinal axis of the hollow cylinder between the inner and outer surfaces at a predetermined line along a circumference of the hollow cylinder. The first end plate defines a hole which is decentered from the longitudinal axis of the hollow cylinder and can be tilted at a predetermined angle to the longitudinal axis of the hollow cylinder towards an area of the inner surface of the hollow cylinder. Additionally, the hole is located at a predetermined angular separation around the circumference of the hollow cylinder from the slit for receiving a light beam directed at the predetermined angle to the longitudinal axis into the cavity. After reflections in the cavity, the light emerges from the slit to form a line of uniform diffuse light.

REFERENCES:
patent: 4186431 (1980-01-01), Engel et al.
patent: 4471228 (1984-09-01), Nishizawa et al.
patent: 4710624 (1987-12-01), Alvarez et al.
patent: 4797711 (1989-01-01), Sasada et al.
patent: 4868383 (1989-09-01), Kurtz et al.
patent: 4899040 (1990-02-01), Davis et al.
patent: 4933779 (1990-06-01), Milch
patent: 5012346 (1991-04-01), DeJager et al.
patent: 5103385 (1992-04-01), Federico et al.

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