Anti-reflection arrangement for optical document scanner

Details Anti-reflection arrangement for optical document scanner Anti-reflection arrangement for optical document scanner

1990-09-12

1992-06-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

385116, H01J 516

Patent

active

051226570

ABSTRACT:
The device is provided with an optical fiber bundle (5) having a first linear end face (9) at the document side and a second end face (11) whose shape is adapted to the shape of the detection system (3).
To reduce the quantity of disturbing light from the light source (43; 61, 62; 44), which may reach the detection system (3), to a maximum possible extent, and to increase the quantity of signal light from the document (1), the second end face (11) is provided with an optical system (13, 14; 50; 70) for an improved coupling in and for reflections. The first end face (9) may also be provided with an optical system (16, 17) for reducing unwanted reflections.

REFERENCES:
patent: 4153333 (1979-05-01), Harada et al.
patent: 4564760 (1986-01-01), Noguchi et al.
patent: 4570063 (1986-02-01), De Bie et al.
patent: 4591714 (1986-05-01), Goto et al.
patent: 4591715 (1986-05-01), Goto
patent: 4776667 (1988-10-01), Yoshida et al.
patent: 4824194 (1989-04-01), Karasawa

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