Pasco Specialty And Mfg Diffraction Slit Set Os 9165 Users Manual 4

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012-01564C
10/91

Instruction Sheet for the PASCO
Models OS-9165 and OS-9179

Diffraction Slit Sets
The PASCO Model OS-9165 includes four slides:
Set 1:
Set 2:
Set 3:
Set 4:

Four single slits.
Four double slits.
Four multiple slits.
Aperture and diffraction patterns.

PATTERN

A

B

C

D

NO. SLITS

2

2

2

2

SLIT WIDTH

.04

.04

.08

.08

SLIT SPACE

.250

.500

.250

.500

The PASCO Model OS-9179 includes two slides:
Set 1: Four single slits.
Set 2: Four double slits.

A B C D

Electroformed Slits
Specifications:
FIGURE 1
Material: .005 mm electroformed nickel
Tolerances: +/- .005 mm

Example for Double Slit Slide:

Slit Width and Spacing:

Pattern 'A' (furthest on the left) consists of two slits,
each .04 mm wide and spaced .250 mm apart, center to
center.

The label on the top of each slide lists four patterns: A,
B, C, and D. The slits are arranged in that order from
left to right on the slide. Figure 1 illustrates the relationship between the label and the slit specifications.
Note: The 'SLIT SPACE' dimension is from center
to center of each slit

Pattern 'B' (second from the left) consists of two slits,
each .04 mm wide and spaced .500 mm apart, center to
center.
In Pattern 'C' and 'D' the width of each slit is .08 mm, while
the center to center spacing is the same as for 'A' and 'B'.

PASCO scientific
10101 Foothills Blvd.
Phone (916) 786-3800

•
•

P. O. Box 619011
FAX (916) 786-8905

•
•

Roseville, CA 95661 USA
TWX 910-383-2040

012-01564C

APERTURES AND DIFFRACTION
PATTERNS
Specifications:
Material: .005 mm electroformed nickel
Tolerances: +/- .005 mm
Pattern Dimensions:
Figure 2 illustrates the relationship between the slide label
and the aperture or diffraction pattern dimensions. Enlargements of patterns 'C' and 'D' are also represented.

PATTERN

A

B

C

D

NO. SLITS

2

2

2

2

SLIT WIDTH

.04

.04

.04

.04

SLIT SPACE

.250

.500

.250

.500

X
Y

X Y

Pattern 'D'

A B C D

Note: The black areas in Pattern 'C' and 'D' represent the actual hole-pattern
Dimensions for both Pattern 'C' and 'D':

FIGURE 1

x = .025 mm
y = .075 mm

Aperture 'A' (furthest on the left) is circular in shape with a
.04 mm diameter.
Aperture 'A' (second to the left) is circular in shape with a
.08 mm diameter.

Operating Instructions
Place the steel pads of any slide against the magnetic surface
of the component holder and move the slide until the desired
slits are in the proper position.

X
Y

Note: It may be necessary to use an Aperture Mask
(such as PASCO Model OS-9139) on the opposite
side of the component holder to insure that light is
incident on only one pattern at any given time.

X
Y

X
Y

Pattern 'C'

2

scientific



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