LEICA TPS1200 - Manual (Page 86)

86 TPS1200 Operation
4.8 Guidelines for Correct Results
General TPS1200 instruments measure a distance using an invisible infrared laser beam
which emerges coaxial from the telescope objective. For application programs
without reflector a visible red laser beam is used which emerges in the same
manner. The visible red laser beam is available for reflectorless instruments.
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Very short distances may be measured reflectorless with the infrared EDM to well
reflecting targets. Note that the distances are corrected with the additive constant
defined for the active reflector.
Distance
measurement
TPS12_002