Sanyo Machine Works, Ltd.

Hiroyuki Kitoh

Masatoshi Ohshima

Yoshihide Aoki

A self-illuminating measurable-point member includes; a light source, a fine through-hole which permits light from the light source to permeate therethrough, and a diffusible member which diffuses light permeating the fine through-hole. Light from the light source is condensed via the fine through-hole and diffused via the diffusible member.

Measuring-point member for optical measurement

A three-dimensional measuring apparatus includes a minimum of a pair of CCD cameras which respectively pick up an image of an objective surface of an objective workpiece requiring dimensional measurement. At least a single unit or a pair of laser scanner sequentially irradiates a plurality of spots on the measurable surface with laser beams. The spots respectively make up measuring points when operating the pair of CCD cameras for measuring dimensions of the objective surface. The laser scanner directly displays the results of the dimensional measurement on the objective surface. An image processing unit computes actual dimensions of the objective surface based on image data received from the pair of CCD cameras which computer system initially makes a comparison between dimensional data of the measured surface received from the image processing unit and basic data of the objective surface previously prepared in the course of designing the objective product, and then figures out a specific domain of the measured objective surface that has actually incurred error from the manufacturing process.

Three dimensional measuring apparatus

A method of measuring three-dimensional dimension of a object comprising the steps of installing two or more than two of CCD cameras, installing a plurality of reference-point members to at least four locations in the periphery of or on a measurable object, installing a reference bar having a known distance between a pair of points thereof, computing positions of respective measurable points based on image data transmitted from those CCD cameras, wherein a computer unit computes absolute positions of those CCD cameras based on horizontal and vertical angles of respective reference-point members and a pair of points of the reference bar against light axes of the installed CCD camera and also based on the distance between a pair of points of the reference bar, and then, the computer unit computes positions of respective measurable points based on processed data as reference. Whenever those image data vary, the computer unit correctively computes absolute positions of the installed CCD cameras.

Growing community of inventors

Nagoya, Japan

Hiroyuki Kitoh