Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical pick-up head unit

An optical pickup and light source technology, applied in optical recording heads, beam guides, optics, etc., can solve the problems of difficult mass production of optical pickup heads and complex manufacturing processes.

Inactive Publication Date: 2002-05-01
SAMSUNG ELECTRONICS CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, not only does this complicate the manufacturing process, but also the adjustment of the film thickness must be performed precisely in units of "μm"
Thereby it is difficult to mass-produce this optical pick-up head

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical pick-up head unit
  • Optical pick-up head unit
  • Optical pick-up head unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0024] image 3 The optical system of the optical pickup head according to a preferred embodiment of the present invention is shown. Refer to image 3 , The optical pickup device includes two laser sources 31 and 39, respectively emitting light beams with different wavelengths; two holographic beam splitters 32 and 40, used to change the optical path of the light beam reflected by the information recording surface of the optical disc; The device 33 transmits or reflects the incident light beam according to the wavelength of the light; the collimating lens 34 can make the incident light beam into a parallel light beam; the holographic ring lens 35 is used to diffract the incident light beam according to its wavelength; and the objective lens 36 is used To focus the light beam on the corresponding information recording surfaces of the op...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
wavelengthaaaaaaaaaa
transmittivityaaaaaaaaaa
Login to View More

Abstract

An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, wherein, the objective lens is designed to an optical recording media most fitting to thinnest, and a holographic rings consisted of a plurality of ring-shape grooves is mounted on the side surface of the objective lens, moreover the holographic region permeates the light beams from the light source, and that the light beams from the second light source are diffracted when permeating said holographic region. The optical pickup apparatus eliminates the spherical aberration generated when an optical recording medium having a different thickness.

Description

[0001] This application is a divisional application of an invention patent application named "Optical head compatible with multi-purpose optical discs and recordable compact discs using holographic ring lenses" and the application number 98108006.5 filed by Samsung Electronics Co., Ltd. on March 28, 1998. Technical field [0002] The present invention relates to an optical pickup device compatible with digital video discs (DVD) and recordable compact discs (hereinafter referred to as CD-R), in particular to a holographic lens that can respectively record information to digital video discs (DVD) in a compatible manner And recordable disc (CD-R), and read information from it. Background technique [0003] The optical pickup device is used to record and read high-density information such as video, audio or data, and its record carrier is a disk, card or cassette. Among them, the disc type record carrier is mainly used. Recently, in the field ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/08G02B5/32G11B7/00G11B7/125G11B7/1275G11B7/135G11B7/1353G11B7/1372G11B7/20
CPCG02B5/32G11B7/1353G11B7/1372G11B2007/0006G11B7/1275G11B7/08
Inventor 刘长勋李哲雨
Owner SAMSUNG ELECTRONICS CO LTD