Table of Contents
Advertisement
Chapter 9 Flatness Measurements
Completing the Set Up Flatness Screen
If you cannot obtain 60 percent beam strength, call your local support
person or Agilent Technologies customer support. Refer to back of this
guide for a list of Agilent Technologies service and support centers.
Making the measurement
In this procedure, you make manual measurements as you move the
reflector. This section explains how to make measurements using the
Record button in the software and on the optional remote control unit.
Before making your measurement, check two things:
1. The repeatability of the optics at rest — Be sure that the reading
displayed does not change when the optics are still. If the display does
change, do the following:
•
Ensure that the foot spacer is sitting flat on the surface plate.
•
The optic is securely fastened to the foot spacer.
•
The surface plate is clean.
•
The optics are thermally stable — 15 ° to 25 °C (59 ° to 77 °F)
2. The optics coming to rest at a station — Check your measurement's
repeatability by stopping at each station along the travel path and
looping back to the previous station to ensure that the readings are
the same. There will be some variation since you are manually moving
the optics, but try to place the optics in the same spot each time.
Non-repeatable readings can also be caused by dirt, dust, granite flakes
under the feet, or temperature variations in the optics. Minimize finger
contact with the optics.
Measurements Reference Guide
9-31
Advertisement
Table of Contents
