KR970050388A - 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 pickup 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 as 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 silicon substrate is integrally formed on one side of the silicon substrate, the laser diode is placed, the support having a heat radiating function, integrally formed at a predetermined position inside the support to detect the optical information of the disk A detector, a prism formed on the other side of the silicon substrate and transmitting a beam emitted from the laser diode, a hologram Fresnel element formed diagonally in the center of the prism to generate a tracking error and a focus error, the upper portion of the Prison The normal light of the incident beam is formed at the abnormal light (S wave), the abnormal light (S wave) is composed of a wavelength conversion unit for converting into an ordinary 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 of the present invention.

3 is an enlarged cross-sectional view of a hologram Fresnel element 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 recording information as an electric signal, a silicon substrate in which a plurality of optical elements are placed. 61, a laser diode 63 for generating a laser beam at a predetermined wavelength, a support 62 having an heat dissipation function, in which the laser diode 63 is placed and formed integrally on one side of the silicon substrate 61; The photodetector 66 integrally formed at a predetermined position inside the support 62 to detect optical information of the disk, and formed on the other side of the silicon substrate 61 to transmit beams emitted from the laser diode 63. A prism 64 formed at a center portion of the prism 64 in a diagonal direction to form a tracking error and a focus error, and formed at an upper portion of the prism 64 to form an incident beam. (P-wave) is the extraordinary ray (S-wave), the extraordinary ray (S-wave) is a light (P-wave) to the switch-integrated optical pickup comprising a wavelength converting part 68 that-up device. The transmissive layer (65a) of claim 1, wherein the hologram fresnel element (65) is formed in a center portion of the prism (64) in a diagonal direction and has a wider width at a lower end portion than an upper portion portion to transmit a beam. And a diffraction grating 65c which is formed in a plurality of concave-convex shapes on the upper surface of the transmission layer 65a and diffracts incident beams to generate a tracking error, and is formed on the concave-convex surface of the diffraction grating 65c and diffracted. The image beam P of the beam is reflected, and the polarized beam split 65b that transmits the abnormal beam S transmits, and a focus error is formed on the lower surface of the transmissive layer 65a and the optical information returned through the disk. Reflecting film 65 which is generated on the Fresnel lens 65e and the lower surface of the Fresnel lens 65e and which includes the focus error is irradiated to the photodetector 66 formed in one side of the support body 65. 65d), wherein the integrated optical pick-up device. ※ Note: The disclosure is based on the initial application.