Device for translating negative film image to a line scan
- 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
Similar Records
Laser accelerometer
Method and apparatus for a high-resolution three dimensional confocal scanning transmission electron microscope
Related Subjects
allow
amplified
amplifier
axis
beam
beam axis
capable
changes
collected
components
control
density
density changes
detector
determined
device
dimensions
diode
diode detector
direct
direct measure
direct measurement
directed
film
film sample
filter
focus
focused
focusing
high-resolution
image
image dimensions
images
input
intensity
intensity control
laser
laser light
lens
light
light source
light transmitted
line
line scan
linear
linear dimension
linear dimensions
means
measurement
mirror
monitored
negative
negative film
optical
optical density
output
passed
perpendicular
photo
plane
plane perpendicular
position
positions
precise
radiographic
radiographic images
reader
recorded
recorder
recording
records
reflected
sample
scan
senses
signal
signal amplified
signal amplifier
slide
source
source capable
translating
transmitted
transmitted intensity
transported
x-axis
x-y
y-axis