Chapter 4 Angular Measurements
Mounting and Aligning the Optics on the Target Machine
4-18 Measurements Reference Guide
5 Adjust the interferometer or laser head so that:
• the laser beam enters the hole of the target on the interferometer
• the interferometer is as perpendicular as possible to the beam
To adjust the interferometer up or down, loosen the large knob on the
height adjuster, move the interferometer up or down, then tighten the
knob. You can also move the interferometer left or right or rotate it left or
right.
You can adjust the laser head by rotating it, translating it, or both.
6 Secure the interferometer to the target machine, maintaining the laser
beam’s position in the center of the interferometer’s target.
To secure the interferometer to a machine table, use a clamp or similar
instrument. Observe the following guidelines when securing the
interferometer:
• If you are securing the optic to the spindle, lock the spindle in place.
• If you are securing the optic to a surface such as a machine table,
make sure the surface is flat so the optic will not rock.
• When using a clamp to secure the optic, try to cover as much of the
optic’s base as possible with the clamp so the attachment is secure.
7 Remove the target from the interferometer.
8 Move the reflector as close as possible to the interferometer, and line up
the edges of the reflector with the edges of the interferometer.
In the rest of this chapter, the position of the reflector near the
interferometer as described above will be referred to as the “start
position.”
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