Elektro-Optischer Entfernungsmesser und Verfahren zur Berechnung des Optischen Rauschsignals

Details

Veröffentlichungs-Nr.

EP4053589

Aktenzeichen

EP22159785

Anmeldetag

2. März 2022

Veröffentlichung

28. Juni 2023

Erteilung

28. Juni 2023

Rechtsraum

EP

IPC

G01S7/481G01S7/497G01J3/02G02B27/48G06T5/00H04N13/254

Abstract

Provided is an electro-optical distance meter in which an error in a distance value caused by noise is reduced without specially devising components and wirings. An electro-optical distance meter (100) includes a light source (11), a light receiving element (22) and a received light amount adjusting means (21), an arithmetic control unit (40), and a storage unit (50), and is configured to measure an electrical noise signal by putting the received light amount adjusting means (21) into a state where the received light amount adjusting means (21) completely blocks light, measure a distance-measuring signal by putting the received light amount adjusting means (21) into a proper state, and calculate a distance by subtracting the electrical noise signal and an optical noise signal from the distance-measuring signal. The arithmetic control unit (40) measures a first noise signal by putting the received light amount adjusting means (21) into a state where the received light amount adjusting means (21) completely blocks light with a noise measuring jig (80) attached to the electro-optical distance meter (100). The noise measuring jig (80) is configured detachable from the electro-optical distance meter (100), is configured to remove reflected light entering the light receiving element when attached and has a unique jig-derived noise signal. The arithmetic control unit (40) measures a second noise signal by putting the received light amount adjusting means (21) into a state where the received light amount adjusting means (21) transmits light most with the noise measuring jig (80) attached. The arithmetic control unit (40) calculates the optical noise signal by subtracting the first noise signal and the jig-derived noise signal from the second noise signal, and stores the optical noise signal in the storage unit.

Anmelder

Firma

TOPCON CORPORATION

Land

🇯🇵 Japan

Fachgebiete