Device for translating negative film image to a line scan
Abstract
A negative film reader records high-resolution optical density changes across negative film radiographic images to allow precise image dimensions to be determined. A laser light source capable of high-resolution focusing is passed through an intensity control filter, focused by a lens, and reflected off a mirror to focus in the plane of the negative film. The light transmitted through the film is collected by a second lens and directed to a photo diode detector which senses the transmitted intensity. The output of the photo diode signal amplifier is sent to the Y-axis input of an X-Y recorder. The film sample is transported in a plane perpendicular to the beam axis by means of a slide. The film position is monitored, with the signal amplified and recorded as the X-axis on the X-Y recorder. The linear dimensions and positions of image components can be determined by direct measurement of the amplified recording.
- Inventors:
- Issue Date:
- Research Org.:
- EG & G Inc
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 644406
- Patent Number(s):
- 5753930
- Application Number:
- PAN: 8-648,219
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- DOE Contract Number:
- AC04-90DP62349
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 19 May 1998
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; PHOTOGRAPHIC FILMS; INDUSTRIAL RADIOGRAPHY; IMAGES; PHOTODIODES; IMAGE PROCESSING
Citation Formats
Dutton, G W. Device for translating negative film image to a line scan. United States: N. p., 1998.
Web.
Dutton, G W. Device for translating negative film image to a line scan. United States.
Dutton, G W. Tue .
"Device for translating negative film image to a line scan". United States.
@article{osti_644406,
title = {Device for translating negative film image to a line scan},
author = {Dutton, G W},
abstractNote = {A negative film reader records high-resolution optical density changes across negative film radiographic images to allow precise image dimensions to be determined. A laser light source capable of high-resolution focusing is passed through an intensity control filter, focused by a lens, and reflected off a mirror to focus in the plane of the negative film. The light transmitted through the film is collected by a second lens and directed to a photo diode detector which senses the transmitted intensity. The output of the photo diode signal amplifier is sent to the Y-axis input of an X-Y recorder. The film sample is transported in a plane perpendicular to the beam axis by means of a slide. The film position is monitored, with the signal amplified and recorded as the X-axis on the X-Y recorder. The linear dimensions and positions of image components can be determined by direct measurement of the amplified recording.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {5}
}