Color-matching apparatus for the visual on-light evaluation of f

Details Color-matching apparatus for the visual on-light evaluation of f Color-matching apparatus for the visual on-light evaluation of f

1995-01-20

1997-02-18

Pham, Hoa Q.

Optics: measuring and testing

Sample, specimen, or standard holder or support

108 23, 362 33, 362 94, G01N 2101, A47F 516, G09F 1304

Patent

active

056045867

ABSTRACT:
A color-matching apparatus for visual on-light evaluation of flexible copies includes a support for at least one copy having a supporting surface being concave as viewed by an observer. An areally radiating illumination configuration emits light of a defined type onto copies and generates a defined intensity of illumination in the supporting surface. The illumination configuration has a radiating surface being substantially convex, as viewed by the observer.

REFERENCES:
patent: 1984898 (1934-12-01), Schamback et al.
patent: 2101710 (1937-12-01), Huber
patent: 4173034 (1979-10-01), Shemitz
patent: 4668090 (1987-05-01), Kipphan et al.
patent: 5115380 (1992-05-01), Huisingh et al.
Publication: Deutsche Drucker (German Printer) No. 38/26, No. 11, p. XIX:.

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