Development of high-speed and high-precision alignment technology using the 3D chart

Abstract

Precise 6-DOF alignment of lenses and sensors is essential for the manufacture of high-performance cameras. The conventional 2D chart method requires multiple imaging with different focal points, so time and accuracy are problems. In this report, 6-DOF alignment error is obtained from a 3D chart image. Since it needs only one image, it is a high speed and accurate. Furthermore, the roof-type 3D chart can simultaneously measure SFR (spatial frequency response) at 100 or more points. Experiments have shown that it is 3 times faster and more accurate than conventional methods.