PASCO OS-8523 SLIT ACCESSORY - Manual (Page 6)

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012-05880D Slit Accessory
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SINGLE SLIT SET S IN G L E S L IT S
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SL IT A CC ES SO RY 646 -05 865 -B
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BASIC OPTICS
SLIT ACCESSORY
OS-8523
SINGLE SLIT SET
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LIN E
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646-05865-B
Assembly
Mounting the Slit Accessory to the Optics
Bench
Each of the slit disks is mounted on a ring which snaps
into an empty lens holder. The ring should be rotated in
the lens holder so the slits at the center of the ring are
vertical in the holder. See Figure 3. Tighten the thumb-
screw on the holder so the ring cannot rotate during use.
To select the desired slits, rotate the disk until it clicks
into place with the desired slits at the center of the holder.
NOTE: All slits are vertical EXCEPT the
comparison slits which are horizontal. The com-
parison slits are purposely horizontal because
the wide laser diode beam will cover both slits to
be compared. If you try to rotate these slits to the
vertical position, the laser beam may not be
large enough to illuminate both slits at the same
time.
To align the laser beam and the slits, place the Diode
Laser (OS-8525) at one end of the bench. Place the slit
holder on the optics bench a few centimeters from the
laser with the disk-side of the holder closest to the la-
ser. See Figure 3. Plug in the Diode Laser and turn it on.
Adjust the position of the laser beam from left-to-right
Figure 3: Slit Accessory and Lens Holder
ring
lens holder
slit disk
attachment
thumbscrew
and up-and-down until the beam is centered on the slit.
Once this position is set, it is not necessary to make any
further adjustments of the laser beam when viewing any
of the slits on the disk. When you rotate the disk to a new
slit, the laser beam will be already aligned. The slits click
into place so you can easily change from one slit to the
next, even in the dark.
optics bench
mounted slit
accessory OS-8525
Diode Laser
adjusting
screws
input jack
(9VDC)
Figure 4: Using the Slit Accessory
with the Diode Laser