Distance measuring apparatus

Details Distance measuring apparatus Distance measuring apparatus

1997-02-19

1999-01-26

Perkey, W. B.

Photography

With exposure objective focusing means, focusing aid, or...

Having auxiliary illumination

356 308, G03B 1336, G01C 308

Patent

active

058647201

ABSTRACT:
A distance measuring apparatus in which two, right and left optical systems respectively comprise sensors (5, 6) is disclosed. Sensor output values (35, 36) representing received-light images (31, 32) on the sensors (5, 6) suffer variations due to sensitivity differences between the sensors (5, 6). In order to correct the variations, the minimum values (RD.sub.L, RD.sub.R) of the two sensor output values are normalized to zero level, and thereafter, the smaller maximum value (e.g., S.sub.R) is normalized to the larger maximum value (e.g., S.sub.L). The correlation calculation is made on the basis of the two normalized sensor outputs to calculate the distance to the object to be measured.

REFERENCES:
patent: 5613167 (1997-03-01), Suzuki
patent: 5617174 (1997-04-01), Mikami

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