Distance measuring apparatus

Details Distance measuring apparatus Distance measuring apparatus

1999-05-10

2000-12-19

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 311, G01C 308, G01C 500

Patent

active

061633712

ABSTRACT:
A distance measuring apparatus includes a light transmission optical system for transmitting a light beam having intensity distribution with a pair of peaks, and a reception system for measuring a distance to an obstacle on the basis of reflected light from the obstacle. The light transmission optical system has a pair of light transmission units for transmitting two light beams, each having a Gaussian intensity distribution, and composition of the two light beams forms the light beam having the intensity distribution with the pair of peaks. The light transmission units are arranged at positions near both ends of a front portion of an automobile, to transmit the two light beams in parallel from the positions. An interval between the peaks is a distance corresponding to an area in which the degree of danger to life is high in a collision against the obstacle, i.e. about 1 m. And the feet of the light intensity distribution with the pair of peaks fall within the width of the automobile.

REFERENCES:
patent: 3721499 (1973-03-01), Narbaits-Jaureguy
patent: 4801201 (1989-01-01), Eichweber
patent: 5519489 (1996-05-01), McClenahan et al.

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