INFICON Guardian EIES Controller - Manual (Page 101)

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Guardian Co-Deposition Controller Operating Manual
signal losses can be significant, which may result in a signal that has a low
signal/noise ratio. As a general rule, we recommend splitting the beam into three
detectors at most.
4.3.3.1 Fiber Optic Beam Splitting
Fiber optic components cost more, but introduce lower light losses than equivalent
optical components. They are especially beneficial when the signal is low or must
be split into several components.
Figure 4-8 Fiber Optic Beam Splitting 782-900-034
4.3.3.2 Fiber Optic Beam Splitter Installation
Figure 4-9 Fiber to Sensor Installation
To attach the main fiber optic bundle to the sensor viewport:
1 Thread the 782-020-060 Fiber Main Coupler onto the sensor feedthrough.
2 Insert the main fiber optic bundle into the fiber main coupler and secure the
fiber optic bundle with two set screws, do not overtighten.
PMT
PMT
PMT
Optical
Detector
Optical
Detector
Optical
Detector
Fiber
Main
Coupler
Fiber
Optic
Splitter
Fiber Main
Bundle
782-022-026-X
Fiber Main Coupler
782-020-060
Sensor
Feedthrough