Abstract:
An improvement in an optical measuring instrument intended for the determination of the distance between two measuring points projected onto a basel plane. The basic device comprises a central optical element with a semi-transparent surface and a totally reflecting surface at a right angle thereto. The device also comprises an outer optical element, such as a mirror or a pentagonal prism, arranged in each beam path between the central optical element and each measuring point, which deflects each respective beam path at a right angle. According to the invention, the central optical element is rotatable about an axis which is parallel to the semi-transparent surface as well as to the totally reflecting surface. By rotating the central optical element one beam will sweep in a plane in space which is defined by the parallel beam paths from the outer optical elements to the measuring points. The device is therefore capable of being employed to determine the location of a random point relative to that plane.
Abstract:
A measuring device for optical measurement of co-ordinates distance between two or more points. The device includes a light source in the beam direction of which one or more deflecting means is or are arranged to project the beam deflected onto indicators placed at the measuring points. The deflecting means are movable along a path, or along paths making angles with each other. The distance is directly readable on a measure tape or on an electronic or mechanical meter.