KR970050386A - 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 support is formed integrally on the upper side of the silicon substrate, the laser diode is placed, the support having a heat dissipation function, integrally formed at a predetermined position inside the support to detect the optical information of the disk A photo detector, a prism formed on the other side of the silicon substrate and transmitting a beam emitted from the laser diode, and formed in a diagonal direction at a center portion of the prism to reflect and transmit a laser beam and to detect an optical information focus error of a disk. Reflective polarizing beam splitting to generate astigmatism, mold on top of the prism And a diffraction grating that separates the laser beam into three beams and generates a tracking error, and an ordinary light beam of the beam incident and installed between the diffraction grating and the objective lens is an abnormal light beam, and the abnormal light beam S is an ordinary light beam It consists of a wavelength conversion unit to convert to.

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 (3)

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 in an electrical signal roll, 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 at an upper portion of the other side of the silicon substrate 61 to transmit a beam emitted from the laser diode 63. 64, a reflective polarization beam split 65 formed diagonally in the central portion of the prism 64 to reflect and transmit a laser beam and to generate astigmatism for detecting an optical information focus error of a disc; A diffraction grating 67 formed on the top of the prism 64 to separate the laser beam into three beams to generate a tracking error, and an image of a beam that is installed between the diffraction grating 67 and the objective lens 54 and is incident. Integrated light pick-up consisting of a wavelength conversion section 68 that converts the light beam P into an abnormal light beam S, and the abnormal light beam S converts the abnormal light beam S into an ordinary light P wave. Device. The transmissive layer 65a of claim 1, wherein the reflective polarizing beam split 65 is formed at a center portion of the prism 64 in a diagonal direction and has a width different from a lower end portion than a width of an upper end portion to transmit the beam. ), A polarized beam split 65b for reflecting an image light beam (P wave) formed on an upper surface of the transmission layer 65a, and transmitting an abnormal light beam (S wave), and the transmission layer 65a. And a reflecting film (65d) formed on the lower surface of the reflector and reflecting the incident beam to the photodetector (66). 3. The integrated optical pick-up device according to claim 2, wherein the transmissive layer (65a) is wider in width (T2) at the lower end than in width (T1) at the upper end. ※ Note: The disclosure is based on the initial application.