BCAL ? Laser Surveying Device B
CAL ? Laser Surveying Device
Laser holding block
Dimensions
match
CCD fixtures for
easy lase
r alignment
CCD comb fixture
Fits on precis
ion
surfa ces of combs.
CCD granite fixture.
Sits on gr
anite surface
Edward Diehl
AT
LAS UM Site Review June 1, 200
0
The BCAL is a device develope
d by Brandeis for doin g precisi
on surveying.
A single?mode laser strikes a
CCD in a precision fixture. T
he image centroid
gives a preci
se position (–1 mm) in the 2 co
ordinates perpendicular to the
beam.
Measurement is fast, easy, an
d reproducible with computer re
ad out and analysis.
We have 2 CCD mounts: one for
granite and one for comb measu
rements.
BCAL ? Results BCAL ? Results
BCAL Computer Program
Edward Diehl
AT
LAS UM Site Review June 1, 200
0
Edward Diehl
AT
LAS UM Site Review June 1, 200
0