Patent ID: 6594430
Filing Date: 2003-07-15
Classification: G02B

Abstract:
An optical waveguide, comprising:a first cladding layer; a second cladding layer, wherein the first and second cladding layers define an optical channel; and a lens disposed in the optical channel of the waveguide, the lens including: a first focusing portion having a first refractive index, wherein the first focusing portion includes a focusing surface and a second surface; and a second focusing portion having an aspherical focusing surface and a second surface, wherein the aspherical focusing surface of the second focusing portion is connected to the second surface of the first focusing portion, wherein the second focusing portion has a second refractive index which is not equal to the first refractive index, such that collimated light incident on the focusing surface of the first focusing portion is focused in a near-field region of the second surface of the second focusing portion.