PASCO OS-8453 High Precision Diffraction Slits - Manual

I n s tr u c t i o n S he e t
0 1 2 - 1 0 3 5 0 A
800-772-8700 www.pasco.com
®
High Precision Diffraction Slits
OS-8453
Included Parts
1. Single-slit wheel with holder
2. Double-slit wheel with holder
Additional Parts Required
• Basic Optics Diode Laser,
OS-8525A (Red) or OS-8458 (Green)
• Basic Optics Bench, part of OS-8515C system
1
Introduction
Model OS-8453 includes two slit wheels with holders designed
for use on a Basic Optics bench with a laser and other Basic
Optics components. Each wheel contains several slits and other
patterns. The wheels can be rotated to change the slit pattern illu-
minated by the laser.
Set-up
1. Snap one of the wheels onto an optics bench with a laser and
screen as illustrated.
2. Aim the laser at the slit
pattern in the “9 o’clock”
position.
3. Turn the wheel to select
the slit pattern to be illu-
minated by the laser.
4. Observe the diffraction
pattern on the screen.
Beam Widening
When using a green laser (which has a narrow beam) with the
“comparisons” patterns, place a lens between the laser and the
slits. This will spread the beam, making it easier to illuminate
both sets of slits simultaneously.
Sensor-based Set-up
To make sensor-based measurements, use a Linear Translator
(OS-8535), Aperture Bracket (OS-8534A), Rotary Motion sen-
sor, and High Sensitivity Light Sensor. For set-up instructions,
see the manual included with the Linear Translator.
1
An optics bench can also be purchased separately (part OS-8541 or
OS-8508). A PASCO dynamics track with Optics Carriages (OS-8472) can
be used instead of an optics bench.
1 2
laser
diffraction slit
wheel
screen
bench
0. 4 m
m
0. 2m
m
a= 0.0 8 LIN E
A PE
R
TU
R
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S
LIN
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SL
IT
D IA
a=: s lit width in mm
D IA
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SI
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SL
ITS
a =
0.0
2 to
0.2
0
PAT
TER
NS
C
IR
C
U
LA
R
VA
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BL
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SL
IT
HIGH PRECISION
DIFFRACTION SLITS
SINGLE
SLITS
0.08
0.0
4
0. 02
a=
:
SQ
UA
RE
HEX
DOT S HO LES
®
selected
slit