Hand-held instrument for reflection measuring of optical density

Details Hand-held instrument for reflection measuring of optical density Hand-held instrument for reflection measuring of optical density

1995-10-04

1997-07-08

Evans, F. L.

Optics: measuring and testing

By shade or color

G01J 346

Patent

active

056467354

ABSTRACT:
To enable top illumination densitometers in the form of a hand-held instrument to be used not only for measuring light reflections but also for transmission of the test data to a computer, a hand-held instrument is provided comprising an instrument housing with a measuring head and an electronic control unit in the housing for converting the values measured in the measuring plane of the sheet. The housing contains an electronic computer input system connected to the electronic control unit, at least one click knob operable externally on the housing, and a control element for the inputs to the computer input system and a junction box for an interface for transmission of the measured data converted in the electronic control unit into signals to a computer.

REFERENCES:
patent: 4961646 (1990-10-01), Schrammli et al.
patent: 5319437 (1994-06-01), Van Aken et al.
patent: 5373364 (1994-12-01), Krzyminski
patent: 5394237 (1995-02-01), Chang et al.
patent: 5400138 (1995-03-01), Peterson et al.
patent: 5426508 (1995-06-01), Schrammli

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