Patent ID: 7548669

Claim:
An optical gate array device for controlling optical signals, comprising: an optical gate array having an array of optical gates; an optical fiber array having an array of optical fibers; and a lens arranged between the optical gate array and the optical fiber array, with a distance “a” from the optical gate array and with a distance “b” from the optical fiber array, for collectively achieving optical coupling between all of the optical gates of the optical gate array and all of the optical fibers of the optical fiber array, wherein: the lens has a focal distance “f” satisfying (1/a)+(1/b)=(1/f), and the lens provides an image magnification of b/a, which is so determined as to be equal to the ratio of the beam spot size of the optical fibers to that of the optical gates, and the ratio of a pitch of the optical fiber array to a pitch of the optical gate array is set so as to be equal to the image magnification.