Laser optical fibre transmission system with adjustable angle of incidence

摘要

An optical transmission system comprises a laser oscillator 1, an optical fiber 3 for propagating the laser beam emitted from the laser oscillator 1 by a predetermined distance, a condenser lens 2 for converging the laser beam from the laser oscillator 1 into the optical fiber 3, a transfer optical system for transferring the laser beam 13 onto an object 5 and an adjusting means 9, for adjusting the angle of incidence of the laser beam converged by the lens 2 upon the optic fibre 3, eg by adjusting the angle of the optic fibre end face, radial movement of lens 2 (fig 9) using rotatable mirrors or prisms, light shielding plates (170, Fig.16) or axially movable axicon (180, Fig.17).