KR970050384A - All-in-one optical pick-up device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pick-up apparatus for recording a signal on an optical data recording medium and reproducing the recorded information as an electrical signal. In particular, the optical pick-up apparatus is integrated and formed in a plurality of optical elements to facilitate assembly and adjustment. An integrated optical pick-up device for contributing to shortening.

To this end, an optical pick-up apparatus for condensing a beam using a laser beam as an objective lens to record a signal on a disk and reproducing the recorded information with an electric signal, comprising: a silicon substrate on which a plurality of optical elements are placed; A laser diode for generating a laser beam at a wavelength, the integrated silicon formed on one side of the silicon substrate, the laser diode is placed, the support having a heat dissipation function, is disposed at a predetermined interval on both sides of the support and integrally formed on the silicon substrate disk First and second photodetectors for detecting optical information of a light source, a prism formed at an upper portion of the other side of the silicon substrate to transmit a beam emitted from the laser diode, and formed at a central portion of the prism in a diagonal direction to transmit the beam Layer and a plurality of irregularities formed on the lower surface of the transmission layer to diffract the incident beam Is a reflective hologram grating composed of a diffraction grating and a reflective film formed on the uneven surface of the diffraction grating and reflecting the diffracted three beams to be irradiated with the first and second photodetectors.

Description

All-in-one optical pick-up device

As this is a public information case, the full text was not included.

2 is a block diagram of an integrated optical pick-up device according to the present invention;

3 is an enlarged cross-sectional view of a reflective holographic lattice according to the present invention;

4 is a plan view of the integrated optical pick-up device according to the present invention;

Claims (1)

In an optical pick-up apparatus for condensing a beam using a laser beam as an objective lens 54 to record a signal on a disk 55, and reproducing the recorded information, an electrical signal is provided. A substrate 61, a laser diode 63 for generating a laser beam at a predetermined wavelength, an integrated body formed on one side of the silicon substrate 61, and a support 62 having the heat dissipation function in which the laser diode 63 is placed; First and second photodetectors 66a and 66b disposed on both sides of the support 62 and integrally formed on the silicon substrate 61 to detect optical information of the disk, and the silicon substrate 61. A prism 64 formed at the upper side of the other side and transmitting the beam emitted from the laser diode path 63, a transmissive layer 65a formed at the center of the prism 64 in a diagonal direction and transmitting the beam; Many unevennesses on the lower surface of the transmission layer 65a A diffraction grating 65c diffracted for diffracted beams formed into a shape and incident, and a reflective film 65d reflecting the three-beams diffracted formed on the uneven surface of the diffraction grating 65c and irradiated with the first and second photodetectors Integrated optical pick-up device consisting of a reflective holographic grid (65). ※ Note: The disclosure is based on the initial application.