Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
An optical pickup comprising: a semiconductor substrate; light-emitting means mounted on said semiconductor substrate, for emitting a light beam; beam-splitting means disposed on the semiconductor substrate, for reflecting, with a first facet thereof, the light beam emitted by the light-emitting means toward an optical information storage medium, and passing the light beam reflected by the optical information storage medium through said first facet toward a second facet thereof; and light-diffracting means disposed in the semiconductor substrate, for dividing the light beam from said second facet into a transmitted light beam and a diffracted light beam.
Claim 2
Dependent Claim
95 words
An optical pickup comprising: a semiconductor substrate; light-emitting means mounted on said semiconductor substrate, for emitting a light beam; beam-splitting means disposed on the semiconductor substrate, for reflecting, with a first facet thereof, the light beam emitted by the light-emitting means toward an optical information storage medium, and passing the light beam reflected by the optical information storage medium through said first facet toward a second facet thereof; and light-diffracting means disposed in the semiconductor substrate, for dividing the light beam from said second facet into a transmitted light beam and a diffracted light beam.
Claim 3
Dependent Claim
83 words
An optical pickup according to claim 1, further including a core layer disposed in the semiconductor substrate, an optical waveguide disposed between said core layer and the light-diffracting means, a first photodetector disposed on a side surface of said core layer remote from said optical waveguide, for detecting the transmitted light beam from said light-diffracting means, and a second photodetector disposed on an end surface of said optical waveguide, for detecting the diffracted light beam from said light-diffracting means through said optical waveguide.
Claim 4
Dependent Claim
42 words
An optical pickup according to claim 1, wherein said second facet of the beam-splitting means is bonded to the semiconductor substrate by an adhesive comprising a transparent material having substantially the same refractive index as the refractive index of said beam-splitting means.
Claim 5
Dependent Claim
90 words
An optical pickup according to claim 1, further including a cladding layer disposed in the semiconductor substrate adjacent to said light-diffracting means, the refractive index of said adhesive being higher than the refractive index of the cladding layer, the arrangement being such that the light beam emitted by the light-emitting means and directly passing through said first facet is fully reflected by a surface of said cladding layer, and the light beam reflected by the optical information storage medium and passing through said first facet passes through said cladding layer.
Claim 6
Dependent Claim
27 words
An optical pickup according to claim 1, further including an optical waveguide disposed in the semiconductor substrate, said light-diffracting means being disposed adjacent to said optical waveguide.
Claim 7
Dependent Claim
44 words
An optical pickup according to claim 1, wherein said light-diffracting means comprises at least two regions for dividing the light beam into the transmitted and diffracted light beams, the transmitted light beam having a greater intensity than the intensity of the diffracted light beam.
Claim 8
Dependent Claim
65 words
An optical pickup according to claim 1, wherein the semiconductor substrate has a pair of spaced mounted lands, said light-emitting means comprising means for emitting the light beam through a surface facing the semiconductor substrate, and a pair of electrodes mounted on opposite side surfaces thereof which are adjacent to said surface, said electrodes having ends held against and connected to said mount lands, respectively.