TW290669B - Pick-up head device and method of determining if beam is properly focused on optical storage media - Google Patents

Pick-up head device and method of determining if beam is properly focused on optical storage media

Info

Publication number
TW290669B
TW290669B TW84108770A TW84108770A TW290669B TW 290669 B TW290669 B TW 290669B TW 84108770 A TW84108770 A TW 84108770A TW 84108770 A TW84108770 A TW 84108770A TW 290669 B TW290669 B TW 290669B
Authority
TW
Taiwan
Prior art keywords
storage media
pick
head device
region
determining
Prior art date
Application number
TW84108770A
Other languages
Chinese (zh)
Inventor
Suoo-Jy Renn
Original Assignee
Ind Tech Res Inst
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ind Tech Res Inst filed Critical Ind Tech Res Inst
Priority to TW84108770A priority Critical patent/TW290669B/en
Application granted granted Critical
Publication of TW290669B publication Critical patent/TW290669B/en

Links

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  • Optical Head (AREA)

Abstract

A pick-up head device, which is applicable to process information stored on one reflective storage media, comprises of: (1) laser for lighting storage media, and the beam from the laser could reflect from the media; (2) one holographic element configured to contact reflected beam, the holographic element includes two regions used to diffract the reflective beam by two different directions. The region has one space relationship on the holographic element, i.e. on pre-selection condition, the region could receive reflective beam with equal quantity; (3) one light detector configured to receive the refractive beam, and used to determined beam quantity projected on each region.
TW84108770A 1995-08-22 1995-08-22 Pick-up head device and method of determining if beam is properly focused on optical storage media TW290669B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW84108770A TW290669B (en) 1995-08-22 1995-08-22 Pick-up head device and method of determining if beam is properly focused on optical storage media

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW84108770A TW290669B (en) 1995-08-22 1995-08-22 Pick-up head device and method of determining if beam is properly focused on optical storage media

Publications (1)

Publication Number Publication Date
TW290669B true TW290669B (en) 1996-11-11

Family

ID=51398268

Family Applications (1)

Application Number Title Priority Date Filing Date
TW84108770A TW290669B (en) 1995-08-22 1995-08-22 Pick-up head device and method of determining if beam is properly focused on optical storage media

Country Status (1)

Country Link
TW (1) TW290669B (en)

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees