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

Laser detector grating unit

A technology of laser detectors and lasers, applied in the direction of instruments, beam sources, optical recording heads, etc., to achieve the effect of low structural height

Inactive Publication Date: 2006-08-02
KONINKLIJKE PHILIPS ELECTRONICS NV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aforementioned references describe several beamsplitters of this type, all of which have the disadvantage that the beamsplitters must be individually positioned on the detector chip

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
  • Laser detector grating unit
  • Laser detector grating unit
  • Laser detector grating unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] As mentioned above, the optical components for an optical recording or readout unit generally include: a laser, a beam splitter, a collimator lens, and an objective lens, which (in addition to the objective lens) are fixed to the detector chip by bonding superior.

[0047] It is an inventive embodiment of the present inventors that, if it is possible to combine specific components into a strip comprising a plurality of said specific components extending across a series of photodiode chips formed on a wafer, then, The strip (and thus the part) will then have significantly improved positioning tolerances. Connecting the individual beamsplitters into a strip results in a product that would normally be considered by a person skilled in the art to be complex and therefore difficult to manufacture. However, the grating beam splitters described below are relatively simple and can provide considerable benefits for the positioning of the bars forming multiple grating beam split...

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

No PUM Login to View More

Abstract

A bar-shaped grating beam-splitter 10 is used for the generation of focus error, tracking error, forward sense and high frequency signal. The beam-splitter is made in bars (40) and is secured to wafer consisting of a plurality of detector chips (14). Securing the bar in position is preferable to securing separate grating beam-splitters individually. Individual light detector grating units are then separated from the wafer.

Description

technical field [0001] The present invention relates to a method of manufacturing a laser detector grating unit (LDGU), a laser detector grating unit, and a grating beam splitter. Background technique [0002] In the field of optical discs and optical recording units for optical discs, it is desired to miniaturize components forming an optical path of an optical recording or readout unit. An existing approach to achieve some degree of miniaturization is to bond individual optical objects onto a detector chip, which includes a light source in the form of a laser. Refer to the attached Figure 5 and 6 Describe such a system. [0003] A laser detector grating unit (LDGU) with a low construction height is constructed as follows. [0004] Beam coupling to one side of the laser detector grating unit results in a substantial reduction in build height and simpler laser assembly. [0005] Figure 5 Represents the current concept of a laser detector grating unit (Source: Phillips)...

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): G11B7/22G11B7/12G11B7/135G11B7/09
CPCG11B7/1395G11B7/0916G11B7/1205G11B7/22G11B7/1353G11B7/123G11B7/127
Inventor W·G·奥普海伊
Owner KONINKLIJKE PHILIPS ELECTRONICS NV