KR970050358A - Integrated dual focus optical pick-up device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dual focus optical pick-up apparatus for recording a signal on a disc having a thickness of 1,2 mm and an optical data recording medium having a thickness of 0.6 mm, and reproducing the recorded information as an electric signal. The present invention relates to an integrated dual focus optical pick-up device that can contribute to ease of assembly and adjustment and light and small size, which are integrally formed with an optical element.

To this end, in a dual focus optical pick-up apparatus for recording signals on optical data recording media of first and second disks having different thicknesses, and reproducing the recorded information as electrical signals, a plurality of optical elements are placed. A silicon substrate, a laser diode generating a laser beam at a predetermined wavelength, an integrated body formed on one side of the silicon substrate, the support having a heat dissipation function, and having a heat dissipation function, an integrated body formed on the other side of the silicon substrate. Reflective prism reflects the beam emitted from

The first and second photodetectors disposed at both sides of the support at predetermined intervals and integrally formed on the silicon substrate to detect optical information of the disks returned through the reflective prism, are formed on one side of the reflective prism. A hologram grating for diffracting the emission beam of the laser diode into three beams, and a plastic case formed on the silicon substrate to seal the plurality of optical elements. A dual focus lens is formed on a predetermined portion of the plastic case to form beam focus on the first and second disks having different thicknesses.

Description

Integrated dual focus optical pick-up device

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

1 is a data recording state according to the type of disc,

2 is a block diagram of a conventional dual focus optical pick-up device,

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

Claims (1)

A dual focus optical pick-up apparatus for recording a signal on optical data recording media of first and second disks 58 and 59 having different thicknesses, and reproducing the recorded information as an electrical signal. The silicon substrate 61 in which the element is placed is integrated with a laser diode 63 generating a laser beam at a predetermined wavelength, and formed on an upper side of the silicon substrate 61 so that the laser diode 63 is placed therein and has a heat radiating function. (62), a reflective prism (64) which is formed integrally on the other side of the silicon substrate (61) and reflects the beam emitted from the laser diode path (63), and is disposed at predetermined intervals on both sides of the support (62). One of the first and second photodetectors 66a and 66b and the reflective prism 64, which are integrally formed on the silicon substrate 61 and detect the optical information of the disk returned through the reflective prism 64. Formed on the side of the laser Is formed on the holographic grating 65, the silicon substrate 61, which diffracts the emitted beam of diode 63 is separated into three beams plastic case 67 to seal the plurality of optical elements. Integral duplex focus optical pick-up consisting of dual focus lenses 68 formed on predetermined portions of the plastic case 67 to form beam focus on first and second disks 58 and 59 having different thicknesses, respectively. Device. ※ Note: The disclosure is based on the initial application.