MCS260B
CORNERSTONE 260B MONOCHROMATORS
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5.2 MICROMETER ADJUSTABLE SLITS
Micrometer adjustable slit assemblies are continuously variable from fully closed (4
µm)
to 3 mm
width (Fig 10). A height adjustment slide allows variation in the height from 3 to 12 mm. Benefits of
the micrometer adjustable slits are flexibility and high throughput. This type of slit is designed
primarily for versatility and convenience in changing resolution and throughput, which are related
to the slit width.
Figure 10: A Micrometer Adjustable Slit.
The slit width setting is read on the micrometer. A set of numbers go around the turning dial.
Another set of numbers are located on the shaft. When the zeroes in both these locations line up,
the slit is fully closed (Fig 11). Turning the dial clockwise advances the dial position further down
on the shaft, closer to the body of the micrometer. This opens the slit.
Multiply the micrometer reading by 10 to determine the actual slit opening size. For example,
turning the dial one full revolution starting from the fully closed position will give a reading of 50 on
the micrometer. Using the multiplier, this indicates the micrometer width is set to 500
μm. If
unsure of the reading, begin at the fully closed position and add up each full revolution made.
Figure 11: A Fully Closed Micrometer Adjustable Slit.
