PASCO OS-8533A POLARIZATION ANALYZER - Manual (Page 7)

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Polarization Analyzer 012-09200A
Aperture Bracket Screen
The Aperture Bracket Screen is designed to help you align the Aperture Disk with a light source. Two
small thumbscrews attach the Aperture Bracket Screen to the front of the Light Sensor Mount.
Aperture Disk
The Aperture Disk has three circular apertures and six slit apertures (numbered one through six). The slit
widths are as follows:
1 = 0.1 mm 2 = 0.2 mm
3 = 0.3 mm 4 = 0.5 mm
5 = 1.0 mm 6 = 1.5 mm
One circular aperture is 8 mm in diameter, the
same dimension as the opening of the PASCO
Model CI-6504A, CI-6604, or PS-2106 Light
Sensor. A second circular aperture has the same
diameter but has a grid pattern of small holes (0.25
mm diameter) that allows 10% transmission of light
through the aperture. The third circular aperture is
2 mm in diameter, or one-fourth the diameter of the
larger circular apertures, and translucent.
The Aperture Disk can be rotated to any of the nine
positions to put one of the slits or circular apertures
in line with a Light Sensor mounted behind the
Aperture Disk.
Using the Aperature Bracket
Mounting a Light Sensor
You can use the Aperture Bracket to
mount a Light Sensor on the Optics
Bench. You can use the Light Sensor to
measure the intensity of light through the
Polarizers as you rotate one Polarizer
relative to the other.
Use either the large thumbscrew or the
post to mount a Light Sensor to the Light
Sensor Mount. Position the Light Sensor
on top of the Light Sensor Mount so the
hole in the bottom of the sensor is in line
with the front hole in the mount and the
opening of the Light Sensor touches the
vertical part of the Light Sensor Mount.
Put the threaded end of the thumbscrew or post through the hole and turn the thumbscrew or post clock-
wise to tighten. See Figure 12 & 13.
Snap the Aperture Bracket Holder into the Optics Bench.Rotate the Aperture Disk so the open circular
aperture is in line with the opening to the Light Sensor.
Aperture
Light Sensor
Light Sensor
Aperture Disk
1
2
3
4
5 6
10%
Aperture Disk
Aperture Bracket
Screen
circular
apertures
slit apertures
(1 - 6)
Light Sensor Mount
large thumbscrew
into front hole
Light Sensor
Aperture Bracket
Holder
Figure 11: Aperture Disk
Figure 13: Light Sensor
onto Mount
Figure 12: Mount the
Light Sensor