초록 ▼

An improved method and apparatus for inspecting the curved surface of a stationary article includes a mirror which is moved to direct a beam of light from a light source through a lens against each point of an arcuate series of points on a curved surface of the article. A second lens focuses beams o

An improved method and apparatus for inspecting the curved surface of a stationary article includes a mirror which is moved to direct a beam of light from a light source through a lens against each point of an arcuate series of points on a curved surface of the article. A second lens focuses beams of light reflected from the article onto a linear detector. The distance between locations at which the reflected light beams are focused on the linear detector corresponds to the distance at which points on the surface of the article are offset due to the curvature of the surface of the article.

대표청구항 ▼

A method of inspecting a curved surface on an article, said method comprising the steps of impinging beams of light in a predetermined order against each point in an arcuate series of points on a stationary curved surface by projecting the beams of light in a predetermined order along a plurality of

A method of inspecting a curved surface on an article, said method comprising the steps of impinging beams of light in a predetermined order against each point in an arcuate series of points on a stationary curved surface by projecting the beams of light in a predetermined order along a plurality of parallel first paths which are offset in a first direction by a known distance, reflecting light beams from each of the points in the series of points in turn along second paths which are offset in the first direction by an amount corresponding to the distance which the first paths are offset in the first direction and which are offset in a second direction transverse to the first direction by an amount corresponding to the distance which the points in the series of points are offset due to curvature of the surface of the article, and eliminating the offset in the first direction between the reflected light beams and maintaining the offset in the second direction between the reflected light beams by sequentially focusing the reflected light beams on a linear detector with the distance between locations at which the reflected light beams are focused on the linear detector corresponding to the distance which the points on the surface in the series of points are offset due to curvature of the surface of the article.