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PASCO OS-8453 High Precision Diffraction Slits User Manual

High precision diffraction slits, Introduction, Set-up

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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

E

S

LIN

E/

SL

IT

D

IA

a=: s

lit width

in mm

D

IA

0.16

SI

NG

LE

SL

ITS

a =

0.0

2

to

0.2

0

PAT

TER

NS

C

IR

C

U

LA

R

VA

RIA

BL

E

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