Active distance measuring apparatus

Details Active distance measuring apparatus Active distance measuring apparatus

1989-02-02

1990-03-20

Kyle, Deborah L.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354403, G03B 300

Patent

active

049096249

ABSTRACT:
An active distance measuring apparatus is equipped with a light projector for projecting modulated light to an object, a photoreceptor for receiving the modulated light reflected from the object and generating an alternating signal corresponding to the distance to the object, and a signal processing circuit for generating distance data from the alternating signal. The signal processing circuit is constituted by high level detecting means for detecting the high level value of the alternating signal, low level detecting means for detecting the low level value of the alternating signal, and an operation means for calculating distance data from the difference of both level values.

REFERENCES:
patent: 4579438 (1986-04-01), Sato et al.
patent: 4796044 (1989-01-01), Amanuma et al.
patent: 4829171 (1989-05-01), Katsumura
patent: 4849781 (1989-07-01), Nakazawa et al.

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