Chapter 4. Aligning a LASER Beam into FROGscan
09/07/2018 Vs 003
FROGSCAN USER’S MANUAL
Page 35
The
Center Iris
can be removed after initial alignment if it is blocking part of a beam that is wider than 8
mm. Ensure that the input laser is blocked and that laser light is not entering into FROGscan. Remove the
Center Iris by twisting it counterclockwise. The Iris will unscrew from the Iris Rod. The Rod will remain in
place on the base plate. Store the Iris in a safe place that is free from contaminants. The Iris may need to
be reinstalled to assist with future realignment.
7.
Next, align the beam vertically (parallel to the FROGscan base)
using the external mirrors until the beam halves visible on the
Focusing Mirror are approximately equal in size. The Fixed
beam is less bright than the Delayed beam because part of its
beam is directed through the Exit Iris for alignment purposes.
Figure 21:
Both
halves of a
TiSapphire
LASER beam
visible on the
Focusing Mirror.
8.
Check to see if the Signal Beam is visible on a card. If the Signal beam is not visible, see Section 5.4,
Troubleshooting.
The system is aligned when:
The beams pass through the Entrance, Center and Exit irises when the irises are closed down.
Both halves of the beam are approximately equal in size on the Focusing Mirror.
If these criteria are not met, further alignment adjustments are required using the two external mirrors.
Summary of Contents for VideoFROG FROGscan
Page 1: ...FROGscan products are protected by United States patents 8068230 7130052 6219142...
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