Plate reader

Details Plate reader Plate reader

1987-04-08

1989-03-07

Rosenberger, Richard A.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

356400, G01N 2101, G01N 2159

Patent

active

048100960

ABSTRACT:
A small, compact plate reader is disclosed for microtitre plates. The reader comprises a totally enclosed housing (19), means e.g. a drawer (2) for receiving and inserting into the housing a microtitre plate (7) which is received into the housing between a light source and a photodetector positioned in vertical alignment above and below the microtitre plate. The light source and detector are mounted on a carriage movable in the housing along each of two orthogonal axes by means of the manual control knobs (10,11) on either side of the housing. The light source and detector are thus positionable with each of the wells of the microtitre plate in turn enabling absorbancy measurements to be made, and visually displayed by a digital display (9). A window (8) in the housing (1) marked with indices corresponding to the cells in the microtitre plate permits a visual indication of the position of the detector head relative to the microtitre plate, for example, by illumination from below of the appropriate index mark by the light source itself, or by a secondary light source.

REFERENCES:
patent: 3919681 (1975-11-01), Nishioka et al.
patent: 3924948 (1975-12-01), Thoden et al.
patent: 4170950 (1979-10-01), Ozaki
patent: 4397560 (1983-08-01), Andresen
patent: 4498780 (1985-02-01), Banno et al.
patent: 4596468 (1986-06-01), Simeth

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