M74050
1/4M IMAGING SPECTROGRAPHS
16
5 SLITS AND ARRAY DETECTOR ADAPTER
To operate any spectrograph, a slits are required at the input port. All types of slits offered with the MS260i
all have 1.5-inch male flanges, allowing them to be easily connected to the wide variety of Oriel accessories
and instruments. The detector is mounted at the axial output port, where an adapter is installed to mount
the Oriel LineSpec detector at the optical plane. The LineSpec detector may be ordered separately, or the
adapter port removed by the end user for installation of a custom adapter.
Note: If it is desired to use this instrument as both a monochromator and spectrograph, dual output port
instrments are available where the lateral output port features a slit identical to the one located at the input
port. The slits should be the same width and height at the input and output ports. A wider input slit when
compared to the output slit results in more stray light inside the instrument. A wider output slit with respect
to the input slit will not increase throughput.
5.1 FIXED SLIT HOLDER AND FIXED SLITS
The fixed slits slide into the holders at the input and optional lateral output port. The width and height
cannot be adjusted, but may be individually replaced with other slit sizes. Fixed slits are a low cost
alternative to micrometer adjustable or motorized slits, and provide excellent repeatability. They are
a good choice when only a few slit sizes are required.
Fixed slits are sold separately to allow customized choices based on the needs of the application.
When ordering an instrument with a fixed slit holder, be sure to purchase one fixed slit for single
output port instruments. When ordering a dual output port instrument, be sure to purchase two fixed
slits of the same model
– one for the input port, and the other for the output port. Insert the slit as
shown, with the label facing outward. Be sure that it is fully inserted into the holder’s slot to ensure
the best performance and repeatability.
Figure 6: A Fixed Slit Installed into the Holder
Fixed Slit Model
Width
Height
77222
10 µm
2 mm
77220
25 µm
3 mm
77725
25 µm
3 mm
77221
50 µm
6 mm
77219
50 µm
3 mm
77728
100 µm
6 mm
77729
100 µm
3 mm
77730
200 µm
10 mm
77731
200 µm
3 mm
77732
500 µm
10 mm
Figure 7: Available Fixed Slits