Alignment Techniques; Summary Of Alignment Methods - HP 5528A User Manual

Model 5528A
Alignment Tech niques
CONTENTS
INTRODUCTION
SECTION 15
ALIGNMENT TECHNIQUES
SUMMA RY OF ALIGNMENT METHODS
TRANSLATING AND TURN ING THE LASER HE AD
GUNS IGHT METHOD
OVERLAPPI NG DOTS METHOD
AUTOREFlECTION METHOD
MAXIMUM MEA SU REM ENT READ ING METH OD
INTRODUCTION
This secti on provides th e information yo u need to adjust the l aser Head to the trave l path
followed by the Optics.
You should develop an understanding o f the principles involved in each alignment method. This
will allow you to adapt any method to your particular appli cat ion.
SUMMARY OF ALIGNMENT METHODS
Alignm ent meth ods are listed in
Table
15-1, along w ith advan tages and disadvantages o f each .
Tab le 15-1 Summary of Alignment Methods
METHOD APPLICATION ADVANTAGES DISADVANTAGES
A. Gu nsight
All
Simplest Inaccurale over
Measurements No reflecti o n smai liraveis
l'osslble In
all situations
No o ther
hardware required
U. Overlapping Distance and VelocilY possible in More compll cilted
Dots
Measu rem en ts only al l situa tions work in K with
refle ctions
No o ther
hilrdwi!rc required
C. Auto - All Speedy More complicated
Reflection Measurements
working wi th
refleCT ions
Need special hardware
Not alwa ys possible
D. Maximum In connection In crea ses
Measurement
with Methods
accuracy of
Reading A, B, andC metho ds
for Distance
A , 11, and C
and Veloci ty
Measurements
15-1