Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1995-05-16
1997-01-28
Ben, Loha
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369109, 369 4412, G11B 700
Patent
active
055983944
ABSTRACT:
An optical pick-up comprising a laser source (laser diode), a plurality of optical elements, beam splitter, focusing means (microlens) and detecting means (photo diode) is disclosed. The plurality of optical elements focuses a laser beam which is emitted from the laser diode onto a magneto-optic disc, and focuses a laser beam which is reflected from the magneto-optic disc onto a photo detector. The beam splitter splits the laser beam, which is emitted from the laser diode, by reflecting a part of the laser beam at a first surface and by refracting the other part of the laser beam at the first surface. The reflected part is entered into the optical elements and the refracted part is passed through the beam splitter and then emerged from a second surface. The microlens is integrally formed on the second surface of the beam splitter by the ion exchanging method. And the microlens focuses the beam which is emerged from the second surface. The photo diode detects the beam which is focused by the microlens. The beam splitter, the beam splitter, the microlens and the photo diode are mounted on a common substrate.
REFERENCES:
patent: 4823331 (1989-04-01), Yoshitoshi et al.
patent: 5005162 (1991-04-01), Mitsumori et al.
patent: 5146449 (1992-09-01), Shimozawa
patent: 5164930 (1992-11-01), Sugiura
patent: 5283771 (1994-02-01), Kadowaki et al.
patent: 5396061 (1995-03-01), Taniguchi et al.
patent: 5410468 (1995-04-01), Horinouchi
Hibino Katsutoshi
Teragaki Yasuko
Ben Loha
Sanyo Electric Co,. Ltd.
LandOfFree
Optical pick-up does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical pick-up, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pick-up will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-945741