Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1993-04-29
1994-12-27
McGraw, Vincent P.
Optics: measuring and testing
For optical fiber or waveguide inspection
356407, 356419, G01J 351, G01N 2127, G01N 2157
Patent
active
053770005
ABSTRACT:
A hand-held combined spectrophotometer and gloss meter quickly and effectively measures the appearance of a color sample. Light generated by a krypton-filled tungsten bulb shines on the sample and is reflected at 45.degree. into twenty-one photodiodes spaced at staggered intervals around the sample stage. A diffuser in the light path reflects a portion of the light back onto a pair of red and blue sensitive reference photodiodes. The output of the red and blue reference diodes compensates for changes in the output of the bulb. An LED produces light which shines on the color sample at an angle of 30.degree.. The reflected light is received by a large-area photodetector which determines the gloss of the sample. A viewing port permits the user to view the sample prior to measurement. When the viewing port door is opened, it automatically actuates the light and illuminates the sample for viewing. The viewing port door is automatically closed by a return spring. The instrument can be hand-held and operated by buttons on the front or a redundant button on the back. The operator may choose between a simple pass/fail appearance indication or can obtain more detailed information from an LCD display. The instrument may also be mounted for lab use and connected to exterior peripherals such as printers and the like.
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Metrologia by Springer-Verlag 1980, "A Reference Instrument for 20.degree., 60.degree. and 85.degree. Gloss Measurements", by W. Budde, pp. 1-5 (1980).
Color and Appearance Technology, Inc.
McGraw Vincent P.
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