Minnesota Mining and Manufacturing Company

Jathan D Edwards

Owen L Nelson

Joseph Andrew Hoffman

John E Potts

James E Steffen

Eric Julius Donaldson

Peter J Vogelgesang

Robert J Mattila

Kenneth J Krepel

Jay Arthur Esch

Timothy S Vraa

John W Ulseth

Norman L Giorgini

Padmanabham A Arimilli

Earl L Cook

A system and method for conditioning a photoconductive radiation detector achieve charge redistribution within a photoconductive layer without the need for charge removal or charge injection techniques. A first conditioning voltage is applied across the detector to establish a first electric field. The first electric field is reversed relative to fields applied to the detector during image exposure and image read-out operations. While the first conditioning voltage is maintained, the photoconductive layer is exposed for a period of time to first conditioning radiation having one or more wavelengths selected to penetrate at least a portion of the photoconductive layer. A second conditioning voltage, less than the first conditioning voltage, then can be optionally applied across the detector to establish a forward bias electric field. While the second conditioning voltage is maintained, the photoconductive layer is exposed for a period of time to second, broad spectrum conditioning radiation. The detector can then be placed in a dark environment for a period of time, in a shorted condition, to dark-adapt the photoconductive layer.

System and method for conditioning a radiation detector

A radiographic image reader acquires electronic signals corresponding to a latent image of an object produced by radiation exposure of a photoreceptive medium within a cassette. The radiographic image reader comprises a light-tight enclosure with at least one access port for inserting and removing the cassette. A scanner subsystem is mounted within the light-tight enclosure for scanning the photoreceptive medium within the cassette to initiate the acquisition of the electronic signals representative of the latent image. A cassette registration and interface subsystem within the light-tight enclosure comprises an electronic interface structure for electronically connecting the photoreceptive medium within the cassette to an electronic component external of the cassette to obtain the electronic signals corresponding to the latent image.

Radiographic image reader

An imaging tracking system and method for tracking optical media using a two wavelength optical head.

Image tracking of optical media using two wavelength optical head

A wallet-sized data card includes a magneto-optic active region configured for rotational recording of data. A fender projecting outwardly from the card is disposed adjacent an outer circumference of the recording region for protecting the magneto-optic recording region.

Optical data card

Growing community of inventors

Oakdale, MN, United States of America

Jathan D Edwards