Hand-held laser distance measuring device with a pulse...

Details Hand-held laser distance measuring device with a pulse... Hand-held laser distance measuring device with a pulse...

2011-05-10

2011-05-10

Alsomiri, Isam (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S005010

Reexamination Certificate

active

07940378

ABSTRACT:
A hand-held laser distance measuring device (1) with pulse reflection mixing includes a control device (2) for calculating the distance (D) to a measurement object (3) over at least one determinable periodic, with a pulse repetition frequency (f), time difference (τ) between a measurement pulse (4) reflected at the measurement object (3) and a reference pulse (6) of an optically emitted transmitting pulse (7) traveling over a reference distance (5) within the device, a local oscillator (8) for generating the transmitting pulse (7) at the pulse repetition frequency (f), at least one delay circuit (9a,9b) which can be controlled by the control device (2), is arranged between the local oscillator (8) and a light detector (10) and/or a light transmitter (12), and generates a delay between the scanning pulses (11) and the transmitting pulses (7) in order to scan the measurement pulse (4) and the reference pulse (6).

REFERENCES:
patent: 4620788 (1986-11-01), Giger
patent: 6462705 (2002-10-01), McEwan
patent: 6633367 (2003-10-01), Gogolla
patent: 6917415 (2005-07-01), Gogolla et al.
patent: 7023531 (2006-04-01), Gogolla et al.
patent: 7535555 (2009-05-01), Nishizawa et al.

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