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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:
 [1]
  1. Longmont, CO
Issue Date:
Research Org.:
EG & G INC
Sponsoring Org.:
USDOE
OSTI Identifier:
871561
Patent Number(s):
5753930
Application Number:
08/648,219
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC04-90DP62349
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
device; translating; negative; film; image; line; scan; reader; records; high-resolution; optical; density; changes; radiographic; images; allow; precise; dimensions; determined; laser; light; source; capable; focusing; passed; intensity; control; filter; focused; lens; reflected; mirror; focus; plane; transmitted; collected; directed; photo; diode; detector; senses; output; signal; amplifier; y-axis; input; x-y; recorder; sample; transported; perpendicular; beam; axis; means; slide; position; monitored; amplified; recorded; x-axis; linear; positions; components; direct; measurement; recording; direct measurement; optical density; plane perpendicular; light source; laser light; transmitted intensity; beam axis; light transmitted; source capable; signal amplifier; negative film; direct measure; diode detector; film sample; intensity control; radiographic images; signal amplified; density changes; linear dimension; line scan; image dimensions; linear dimensions; /250/356/

Citation Formats

Dutton, G Wayne. Device for translating negative film image to a line scan. United States: N. p., 1998. Web.
Dutton, G Wayne. Device for translating negative film image to a line scan. United States.
Dutton, G Wayne. Tue . "Device for translating negative film image to a line scan". United States. https://www.osti.gov/servlets/purl/871561.
@article{osti_871561,
title = {Device for translating negative film image to a line scan},
author = {Dutton, G Wayne},
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}
}

Patent:

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