Media discriminating and media presence sensor

Details Media discriminating and media presence sensor Media discriminating and media presence sensor

1989-12-26

1992-08-18

McGraw, Vincent P.

Optics: measuring and testing

Of light reflection

With diffusion

250341, 250561, 355311, G01N 2147

Patent

active

051393395

ABSTRACT:
A media discriminating and presence sensor that can detect and discriminate between paper and transparency uses a light emitting diode and two defectors configured so as to measure both diffuse and specular reflectivity of the media, and a media support surface that suppresses unwanted reflections.

REFERENCES:
patent: 3435240 (1969-03-01), Brunton
patent: 4092068 (1978-05-01), Lucas et al.
patent: 4525630 (1985-06-01), Chapman
patent: 4540887 (1985-09-01), Minerd
patent: 4754148 (1988-06-01), Barkowski
patent: 4967094 (1990-10-01), Horton et al.

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