Topcon Corporation

Takahiro Maehara

Jun Abe

Katsuyuki Nagai

Decrease in a measurable distance that occurs when a distance measuring light is obliquely incident on an object is suppressed. A distance measuring deviceincludes an emitting unit, a detecting unit, a frequency-modulated component separating unit, a selecting unit, and a distance calculating unit. The emitting unitemits distance measuring light to an object to be measured. The distance measuring light is modulated by multiple modulation frequencies. The detecting unitreceives and detects light of the distance measuring light that is reflected from the object. The separating unitseparates components of the received reflected light into multiple frequency-modulated components. The selecting unitselects a frequency-modulated component that has a received-light intensity exceeding a threshold value from among the separated multiple modulation frequencies. The distance calculating unitcalculates a distance to the object based on the selected frequency-modulated component.

Growing community of inventors

Itabashi-ku, Japan

Takahiro Maehara