PASCO OS-8524 APERTURE ACCESSORIES - Manual

Instruction Sheet
for the PASCO
Model OS-8524
APERTURE ACCESSORIES
012-05882A
1/96
$1.00
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teach science
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Phone (916) 786-3800 • FAX (916) 786-8905 • email: [email protected]
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®
© 1996 PASCO scientific
This instruction sheet written/edited by: Ann Hanks
OS -85 24 BAS IC OP TI C S
A P E R T U R E A C C E S S O R Y
C E N T R A L M A S K
f/ 5.6 f/4
f/2 2
f/1 6 f/1 1
f/8
OS-8524 APER
TURE
ACCESSOR
Y BASIC OPTICS
17.7 mm DIA 25.0 mm DIA
4.4 mm DIA
6.3 mm DIA 8.8 mm DIA
12.5 mm DIA
f ST OP FOR
100 mm F .L. LENS
Figure 1: Aperture Accessories Assembly
optics bench
Central or
Peripheral Mask
Aperture Disk 100 mm
lens
Aperture Disk
When the aperture size is reduced by one setting, the in-
tensity of the light transmitted through the smaller aper-
ture is half the intensity through the next larger aperture.
The 6 apertures on this disk correspond to 6 ƒ-stops as
defined in photography. The ƒ-stop is defined as follows:
f value =
focal length of the lens
diameter of the aperture
f/ 5.6
f/4
f / 2 2
f /16
f/1 1
f/ 8
OS-8524 APER TURE ACCESSOR
Y
BASIC OPTICS
17.7 mm DIA
25.0 mm DIA
4.4 mm DIA
6.3 mm DIA
8.8 mm DIA
12.5 mm DIA
f ST OP FOR 100 mm F .L. LENS
OS -85
24
BA
SIC
OP TIC
S
AP ER TU RE AC CE SS OR Y CE NT RA L MA SK
OS
-85
24
BA SIC
OP TIC
S
AP ER TU RE AC CE SS OR Y PE RIP HE RA LM AS K
Aperture Disk
Spherical Aberration
Attachments
Central (center) Mask
Introduction
The Pasco OS-8524 Aperture Accessories are designed to
be used with the PASCO OS-8515 Basic Optics System.
The Aperture Disk provides 6 holes, corresponding to ƒ/
4, 5.6, 8, 11, 16, and 22 apertures for a 100 mm lens (in-
cluded with the PASCO OS-8515 Basic Optics System).
The Spherical Aberration Attachments enables the user to
investigate how the center and outside parts of a lens fo-
cus light in different planes.
Equipment
This set includes two different accessories to the Basic
Optics System (OS-8515):
– An Aperture Disk for demonstrating the ƒ-stops
used in cameras.
– Spherical Aberration Attachments for masking the
center and outer areas of a lens to show spherical
aberration.
Assembly
Simply snap the Aperture Disk, Central Mask, or Periph-
eral Mask onto a lens from the Basic Optics System. See
Figure 1.
Peripheral (outer) Mask