PASCO OS-8453 User Manual
®
Instruction Sheet
High Precision Diffraction Slits
OS-8453
Set-up
1. Snap one of the wheels onto an optics bench with a laser and
screen as illustrated.
012-10350A
12
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 illuminated by the laser.
diffraction slit
laser
wheel
screen
bench
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 illuminated by the laser.
selected
slit
L
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HIGH PRECISION
D
DIFFRACTION SLITS
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SINGLE
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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.
B
L
E
S
L
I
T
Sensor-based Set-up
To make sensor-based measurements, use a Linear Translator
(OS-8535), Aperture Bracket (OS-8534A), Rotary Motion sensor, and High Sensitivity Light Sensor. For set-up instructions,
1
An optics bench can also be purchased separately (par t OS-8541 or
OS-8508). A PASCO dynamics track with Optics Carriages (OS-8472) can
be used instead of an optics bench.
800-772-8700 www.pasco.com
see the manual included with the Linear Translator.
High Precision Diffraction Slits OS-8453
About the Diffraction Slits and
Other Apertures
Single Slits Wheel
Hex Pattern
Transparent, equilateral triangles
0.107 mm
are arranged as
illustrated.
0.02 mm
Dots Pattern
100 opaque circles
1.6 mm
diameter
are scattered on a
transparent background as illustrated.
Holes Pattern
100 transparent
0.06 mm
diameter
circles are scattered on an opaque
background. The
holes pattern is the same as the dots pattern, but with transparent
and opaque areas switched.
Circular Apertures
The two circular apertures have diameters of 0.2 mm and
0.4 mm.
Single Slits
The four singles slits have widths of 0.02 mm, 0.04 mm,
0.08 mm, and 0.16 mm.
Variable Slit
The “Variable Slit” is a wedge-shaped aperture ranging from
0.02 mm to 0.20 mm wide. Rotate the wheel to illuminate any
point along the length of the slit.
Square Pattern
Transparent
squares are
arranged in a grid.
0.02 mm
Each square is
0.107 mm wide.
The center-to-center spacing between
adjacent squares is
0.107 mm
0.109 mm.
Line
The opaque line on a transparent background is 0.08 mm wide.
Line/Slit Comparison
The opaque line on a transparent background and the transparent
slit on an opaque background can be illuminated simultaneously.
The line and slit are each 0.040 ± 0.005 mm wide.
opaque
line
transparent
slit
2
®
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