Photodetector assembly for a laser scanning apparatus
This patent describes a laser scanning apparatus having a curved field for receiving a radiograph to be scanned, a source of interrogating radiation, means for producing a focussed scanning beam of interrogating radiation onto the radiograph, a gantry for mounting the source and beam producing means, means for relatively displacing the gantry with respect to the field so as to cause the beam to scan the field in raster fashion, and a photodetector assembly positioned with respect to the field to receive radiation transmitted through the radiograph, the photodetector assembly itself including a photodetector device comprised of a plurality of semiconductor elements connected electrically in parallel and physically arranged in edge-to-edge abutting relationship. The improvement comprises the elements being arranged in a curvilinear pattern with each being substantially equally spaced from the radiograph.
- Assignee:
- E.I. Du Pont de Nemours and Co., Wilmington, DE
- Patent Number(s):
- US 4814606
- OSTI ID:
- 6081604
- Resource Relation:
- Patent File Date: Filed date 24 Feb 1988
- Country of Publication:
- United States
- Language:
- English
Similar Records
Scanning radiographic apparatus
SU-F-T-208: An Efficient Planning Approach to Posterior Fossa Tumor Bed Boosts Using Proton Pencil Beam Scanning in Fixed-Beam Room