Apparatus for measuring optical properties of paper

Details Apparatus for measuring optical properties of paper Apparatus for measuring optical properties of paper

1984-04-24

1987-07-07

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356334, G01J 332, G01N 2186

Patent

active

046783253

ABSTRACT:
The available equipment for measuring optical properties of paper are inconvenient in use and calibration thereof is inaccurate. In addition, properties of a sample are not analyzed sufficiently. According to the invention, a background screen (2) of an apparatus is adapted to be displaced relative to housing (1) and provided with elements (17-21) for measuring optical properties and calibrating said apparatus. In addition, an assembly (9-15) for processing scattered light comprises a grid (13) and at least one limiter (15), positioned between detector (16) and grid in the immediate proximity of detector and adapted to be movable along with detector over the entire range of a spectrum.

REFERENCES:
patent: 3762817 (1973-10-01), Harklau
patent: 3936189 (1976-02-01), DeRemigis
patent: 4015904 (1977-04-01), DeRemigis
patent: 4084906 (1978-04-01), Bibbero
patent: 4222064 (1980-09-01), Lodzinski
patent: 4243319 (1981-01-01), Lodzinski
patent: 4279511 (1981-07-01), Maute et al.
patent: 4439038 (1984-03-01), Mactaggart
patent: 4565444 (1986-01-01), Mactaggart

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