Maximum Measurement Reading Method; Autoreflection Summary - HP 5528A User Manual

Model
55281\
Alignme nt Techniques
ROTATE ANYTIME RETURN DOT
IS NOT ON EXIT PORT.
RETURN DOT
1
L
RETURN DOT
TRANSLATE ONLY IF BEAM IS
NOT CENTERED ON YOUR
AUTOREFLECTING SURFACE.
Figure
15-9. Auforellecfio n
Summary
MAXIMUM MEASUREMENT READING METHOD
This alignrnenl method is used only fo r Distan ce or ve lOcity measurements.
You sho uld use this method in cri tical high accuracy measurements where any co sine error , no
matte r how small , is unacceptable .
Descriplion
The laser Measurement System will only measure th e component o f distan ce o r velocity parallel
to its laser beam. This componen t can be represe nted by the long leg of a right tr iangle with the
hypotenuse of that triangle representing the actual path traveled by the opti cs.
~ See
Figure 6- 131
This means that if an y cos ine e rror is present , the laser Systcm 's reading will be sli ghtl y less than
th c actual !raveled di stan ce or velocity .
15-11