Patent ID: 7408847
Filing Date: 2008-08-05
Classification: B82Y,G02B,G11B

Abstract:
1. An integrated optical head comprising: a light source emitting light; a waveguide guiding the light; an input coupler located at one edge of the waveguide, coupling light emitted from the light source and transmitting the coupled light to the waveguide; an output coupler located at another edge of the waveguide, coupling light emitted from the waveguide and focusing the coupled light on an optical disc; a light path changing unit installed on the waveguide, changing the light path of light that has been reflected by the optical disc and then passed through the output coupler; and an optical detector receiving the light passed through the light path changing unit and converting the received light into an electrical signal in order to detect information from the optical disc; and an optical fiber having one end connected to the light source and another end inserted into a rear end of the waveguide, wherein the input coupler is a tapered coupler that has a tapered end, wherein light entering through a rear end of the waveguide travels while being totally reflected by the tapered coupler.