Distance meter using triangulation for automatic focus for camera - has reflected infrared beam collector consisting of near and far region collectors for directing light respectively to near and far region position sensitive detectors.

摘要

The distance meter uses the triangulation method. A source sends a light beam to an object and a light collector focuses reflected light onto a position detector (24) which determines the position of the incident beam. The collector selectively focusses the reflected light onto a near region detection section or onto a far region detection section. The separate and mutually independent near and far region sections (24a,24c;24b,24d) are both formed on the position detector. USE/ADVANTAGE - For measuring distance from object to distance meter. Simple arrangement measures distance very accurately and over wide range.