Optical instrument with angle indicator and method for...

Geometrical instruments – Straight-line light ray type – Vertical angle

Reexamination Certificate

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Details

C033S290000, C340S689000

Reexamination Certificate

active

07841094

ABSTRACT:
The present invention relates to an optical instrument with an angle indicator and a method for operating the same enabling simple monitoring of instrument inclination and operation in a large angle range. The optical instrument comprises a base portion, a head portion tiltable relative to the base portion within a device angle range, a base angle indicator attached to the base portion for determining a base angle of the base portion and a determination unit for determining an indication angle range of the head portion based on the base angle and the device angle range.

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