Device for translating negative film image to a line scan

Patent · Tue May 19 00:00:00 EDT 1998

OSTI ID:871561

Dutton, G Wayne ^[1]

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1. Longmont, CO

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.

• Research Organization: EG & G INC
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-90DP62349
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5753930
• Application Number: 08/648,219
• OSTI ID: 871561
• Country of Publication: United States
• Language: English

Related Subjects

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/