Measuring apparatus

Details Measuring apparatus Measuring apparatus

2007-11-27

2007-11-27

Porta, David (Department: 2884)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C356S430000

Reexamination Certificate

active

10768450

ABSTRACT:
A measuring apparatus is provided having an illumination unit including a source of electromagnetic radiation, fiber optic apparatus and sensing apparatus. The fiber optic apparatus includes first fiber optic structure having an input end for receiving at least a portion of electromagnetic radiation emitted from the radiation source and an output end for directing the received radiation to a web of material, and second fiber optic structure having an input end for receiving radiation reflected from the web of material and an output end for directing the reflected radiation to the sensing apparatus. The sensing apparatus includes a first detector for sensing electromagnetic radiation of a first wavelength band and generating a corresponding first output signal and a second detector for sensing electromagnetic radiation of a second wavelength band and generating a corresponding second output signal indicative of a first property to be measured of the web of material.

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