INFICON Guardian EIES Controller - Manual (Page 116)

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Guardian Co-Deposition Controller Operating Manual
4.8 Monochromator Option
The 782-900-070 Monochromator Kit, see Figure 4-18 , contains just one optical
element, an aberration-corrected holographic grating. It has no internal mirrors.
Specifications
 Focal length 100 mm, Aperture F/3.5, Bandwidth 5 nm
 Grating: Groove density 1200 gr/mm, Blazed for 250 nm
 Wavelength counter: Digital, direct reading in nm, graduated in 0.2 nm intervals
 Wavelength 200-800 nm
Entrance/Exit couplers to connect to Detector module and fiber optic bundle to
connect to Guardian sensor feedthrough are included in the kit.
4.8.1 Monochromator Installation
1 Place the 782-022-031 coupler on the monochromator entrance slit. Rotate
until it drops into the locating pins, then secure with three 086-145 set screws.
2 Install the fiber light collimator and lens assembly (782-020-061, 070-1637 and
070-1620) onto the Guardian feedthrough.
3 Attach the 782-022-033 fiber bundle to the collimator. Handle fiber with care to
avoid breaking fibers in the bundle.
4 Secure the monochromator within range of the fiber bundle, using the
782-022-035 base plate or the four 6-32 threads in the monochromator itself.
Provide sufficient clearance space to accomodate the PMT detector module in
step 7.
5 Insert the rectangular end of the 782-022-033 fiber bundle, smooth side facing
the set screw in the 782-022-031 coupler, until it bottoms on the
monochromator entrance slit and secure with set screw- do not overtighten.
6 Thread the 782-022-037 male coupler into the PMT detector module.
7 Secure the PMT detector module with coupler to the monochromator exit slit
using three set screws.
8 Verify that all connections are optically tight. Stray light entering will increase
noise levels and may cause PMT saturation.