KR970050385A - 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 an electric signal using the recorded information. An optical pick-up apparatus for recording a signal on and reproducing the recorded information into an electrical signal, comprising: a silicon substrate on which a plurality of optical elements are placed; a laser diode generating a laser beam at a predetermined wavelength; and one side of the silicon substrate The laser diode is formed in the upper part and placed in the laser diode and has a heat dissipation function, a photo detector integrated in a predetermined position inside the bark body to detect the optical information of the disk, formed on the other side of the silicon substrate and emitted from the laser diode The prism that transmits the beam, which is formed in the center of the prism in a diagonal direction to generate a tracking error A polarization hologram element for irradiating the objective lens, and irradiated by the astigmatic aberration occurs in the optical information to the optical detector, the beam is incident is formed on the prism

The ordinary light (P wave) is composed of a wavelength conversion unit that converts the abnormal light (S wave) and the abnormal light (S wave) into the normal light (P wave).

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 polarizing beam split according to the present invention;

Claims (2)

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 as an electric signal, a silicon substrate on which a plurality of optical elements are placed (61), a laser diode (63) for generating a laser beam at a predetermined wavelength, the support body (62) having a heat dissipation function, in which the laser diode (63) is integrated and formed on an upper side of the silicon substrate (61), and A photo detector 66 integrated at a predetermined position inside the support 62 to detect optical information of the disk, and a prism formed on the other side of the silicon substrate 61 to transmit a beam emitted from the laser diode 63. (64), the polarization is formed in the central portion of the prism 64 in a diagonal direction to generate a tracking error to irradiate the objective lens 54, and to generate astigmatism in the optical information to irradiate the photodetector 66 alone Ram light (65), the upper light beam (P wave) of the beam formed on the upper part of the prism (64) is converted into the abnormal light beam (S wave), the abnormal light beam (S wave) is converted into the normal light beam (P wave) Integrated optical pick-up device consisting of a wavelength conversion section 67 to be made. According to claim 1, wherein the polarization hologram element 66 is formed in the center portion of the prism 64 in the diagonal direction to transmit a beam and a plurality of upper surfaces of the transmission layer (65a) A diffraction grating 65c that diffracts the incident beam formed into an uneven shape to generate a tracking error by diffracting the beam into a three beam, and an image beam P of the beam diffracted and formed on the uneven surface of the diffraction grating 65c is reflected. The abnormal light beams (S waves) are formed on the polarizing beam split 65b and the lower surface of the transmissive layer 65a to generate astigmatism for focus error detection and irradiate the photodetector 66 with the incident light. An integrated optical pick-up device, characterized by comprising a reflecting film (65d). ※ Note: The disclosure is based on the initial application.