Patent ID: 6775070
Filing Date: 2004-08-10
Classification: G02B

Abstract:
A collimator lens comprising:a cylindrical glass tube; a columnar fiber chip which is fixed within the cylindrical glass tube and has a through-hole along its center axis, and one end of which is an elliptic surface tilted at a predetermined angle to the center axis, an optical fiber which is inserted from the other end of the fiber chip into the through-hole, a tip of the optical fiber being positioned on the elliptic surface; and a columnar lens which has at one end an elliptic surface opposite to and substantially in parallel with the elliptic surface of the fiber chip and is fixed in the cylindrical glass tube, wherein the collimator lens has a reference plane parallel to a plane containing a major axis of the elliptic surface at one end of the columnar fiber chip and a center axis of the columnar lens, the reference plane serving as a reference when the collimator lens is to be aligned.