INTERFERENCE AND
DIFFRACTION PATTERNS WITH CCD CAMERA
APPARATUS
CAL
sheet aka Cornell slitfilm demonstrator
202-21-B6
laser
202-21-B6
CCD
camera,
attenuator, USB cable
015A
laptop
with
BeamView software
206
DESCRIPTION
Use the laser and slits to produce
interference patterns on the detector. The software displays a
two-dimensional intensity profile, and plots of I vs x and I vs y, as
can be seen in the screen shot above.
NOTES
The Cornell
sheet
is shown here:
Column 1: single slits of
different
widths
Column 2: double slits of
constant
width and variable spacing becoming double slits of constant spacing
and
variable width, becoming single slit of varying width.
Column 3: gratings with various
ratios of slit width to slit spacing
Column 4: gratings with
different
numbers of slits, each with same slit width and spacing.
Column 5: double slits of
different
spacings.
To set up the camera,
use the USB cable to connect it to the laptop and launch the BeamView
software. Start with the fixed attenuator in place. Select
"play" in the software and adjust the attenuation using the fixed
attenuator, and the variable attenuator knob on the side for fine
control. Keep the lens cap on the camera when not in use.
