KR970050391A - Integrated dual focus optical pick-up device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk having a thickness of 1.2 mm and a dual focus optical pick-up device for recording a signal on an optical data recording medium having a thickness of 0.6 mm and reproducing the recorded information into an electrical signal. The present invention relates to an integrated dual focus optical pick-up device capable of contributing to the ease of assembly and adjustment and light and small size by integrally forming optical elements.

To this end, in a dual focus optical pick-up apparatus for recording a signal on optical data recording media of first and second disks having different thicknesses and reproducing the recorded information as an electrical signal, a plurality of optical elements are placed. A silicon substrate, a laser diode formed inside one side of the silicon substrate to generate a laser beam having a predetermined wavelength, a prism formed on one side of the silicon substrate on which the laser diode is located to transmit a laser beam, and a diagonal portion in a central portion of the prism A beam split formed in a direction to transmit and reflect an incident beam at a predetermined ratio; a support formed on an upper portion of the other side of the silicon substrate; a photo detector formed at a predetermined position inside the support to detect optical information of the disc; A plastic case formed at an upper portion to seal the plurality of optical elements, the prism and Is formed in the plastic case of the response position is made of a dual-focus lens for forming a thickness of the respective beam focus at different first and second disk.

Description

Integrated dual focus optical pick-up unit

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

3 is a block diagram of an integrated dual focus optical pick-up device according to the present invention.

Claims (1)

In a dual focus optical pick-up apparatus for recording signals on optical data recording media of first and second disks 58 and 59 having different thicknesses, and reproducing the recorded information as electrical signals, A silicon substrate 61 in which elements are placed, a laser diode 60 formed inside one side of the silicon substrate 61 to generate a laser beam of a predetermined wavelength, and a silicon substrate 61 in which the laser diode 60 is located. A prism 64 formed at one side of the upper portion of the prism 64 to transmit a laser beam, a beam split 65 formed at a center of the prism 64 in a diagonal direction to transmit and reflect an incident beam at a predetermined ratio, and the silicon substrate ( 61 is formed on the support 62 formed on the upper side of the other side, a photodetector 63 formed at a predetermined position inside the support 62 to detect optical information of the disk, and formed on the silicon substrate 61. Flange to seal optical element The dual case lens is formed of a plastic case 67 and a plastic case 67 corresponding to the prism 64 to form beam focus on the first and second discs 58 and 59 having different thicknesses. An integrated dual focus optical pick-up device. ※ Note: The disclosure is based on the initial application.