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Title: 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}
}