Photoconductor-photocathode imager
AssigneeInfiMed, Inc.
InventorsThomas Lee Vogelsong, Robert M. Iodice
Life of this patent
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Abstract
A high resolution radiation sensitive imager includes a radiation sensitive photoconductive target for forming an image in response to incident radiation, a light sensitive cathode arranged in spaced apart relationship with the target, and an addressable light source coupled to the photocathode for causing the photocathode to emit electrons at localized sites for reading an image on the target.
Claims44
A high resolution radiation sensitive imager comprising:
- a radiation sensitive photoconductive target, for forming an image in response to incident radiation;
- a light sensitive photocathode arranged in spaced apart relationship with the target;
- a light source coupled to the photocathode for causing the photo cathode to emit electrons for addressably reading an image formed on the target.
A method of producing an x-ray image comprising:
- placing a charge on an x-ray sensitive photoconductor;
- producing an x-ray field having sufficient intensity and energy to penetrate an object and produce a latent image on said photoconductor;
- exposing said object to be imaged to said x-ray field;
- exposing said photoconductor to said x-ray field from said object such that said x-ray field interacts with said photoconductor to produce said latent image;
- reading out said photoconductor with electrons produced from a photocathode source;
- exposing said photocathode source from a light source.
A method of reading out a latent image stored as a pattern of charge on a radiation sensitive photoconductor comprising restoring the charge with electrons produced from a photocathode illuminated by a light source.
A method of detecting an image comprising;
- forming a latent image on a photoconductor;
- illuminating a light sensitive photocathode to produce electrons;
- accelerating the electrons from the photocathode so that they impinge on the photoconductor;
- measuring the current between the photocathode and the photoconductor to create an electrical signal corresponding to the latent image on the photoconductor.
A high resolution radiation sensitive imager comprising:
- a radiation sensitive photoconductive target, for forming an image in response to incident radiation;
- a light sensitive photocathode arranged in spaced apart relationship with the target;
- an addressable light source coupled to the photocathode for causing the photocathode to emit electrons for reading an image formed on the target.
Dependencies are inferred from the claim text.