Patent ID: 7080947

Claim:
An optical device comprising: a first optical component comprising at least one optical fiber, and a second optical component comprising an optical functional element having a diameter larger than a diameter of said first optical component, wherein an end of said first optical component is attached to an end of said second optical component, and wherein a curved edge is disposed on an end portion of said second optical component adjacent to where said ends meet so that an inclination angle of a first imaginary straight line with respect to a circumferential surface of said first optical component falls within a range from about 40 degrees to about 70 degrees; said first imaginary straight line connecting a first point at which a second imaginary straight line intersects with said curved edge and a second point at which a third imaginary straight line intersects with said curved edge; said second imaginary straight line being parallel to a longitudinal direction of said first optical component and apart from a circumferential surface of said first optical component by substantially one-third of a radius difference between said first and said second optical components; said third imaginary straight line being parallel to the longitudinal direction of said first optical component and apart from the circumferential surface of said first optical component by substantially two-thirds of said radius difference.