TM 5-6675-328-14
CHAPTER 2
SHORT-RANGE OPTICAL CALIBRATOR
Section I INTRODUCTION
2-1.
GENERAL INFORMATION.
2-1.1
Scope.
a.
Model Number and Equipment Name. Model 270 BN Universal Short-Range Optical Calibrator.
b.
Purpose of Equipment. To provide a means to calibrate, test, and/or adjust optical surveying equipment.
2-1.2
Reference Information.
Theodolite . ................................................................................................ Operator, Organizational,
Direct Support, and General
Support Maintenance
Manual for Theodolite,
Wild-Heerbrugg Model T-2,
TM 5-6675306-14.
2-1.3
Glossary.
Aim ............................................................................................................ To regulate direction of a
sighting device.
Alidade....................................................................................................... That part of an optical
device that turns in azimuth
with the telescope.
Autocollimation. ......................................................................................... When an alinement scope
is focused on a reflecting
surface so that the
reflecting image of the
reticle is in register with its
reticle pattern.
Autoreflection............................................................................................. When an alinement scope
is focused to reveal the
image of the autoreflection
target and this is made to
register with the reticle
pattern.
2-1
