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 Title: |
US5646928:
Free-space integrated micro-pickup head for optical data storage and a micro-optical bench
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Wu, Ming C.; Pacific Palisades, CA
Lin, Lih-Yuan; Los Angeles, CA
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| Assignee: |
The Regents of the University of California, Oakland, CA
other patents from UNIVERSITY OF CALIFORNIA, THE REGENTS OF (599425) (approx. 4,840)
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| Published / Filed: |
1997-07-08
/ 1995-06-22
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| Application Number: |
US1995000493240
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| IPC Code: |
Advanced:
B81B 3/00;
G02B 6/122;
G02B 6/36;
G02B 6/42;
G11B 7/12;
G11B 7/125;
G11B 7/135;
G11B 7/22;
G02B 6/12;
G11B 7/00;
Core:
more...
IPC-7:
G02B 6/12;
G11B 7/00;
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| ECLA Code: |
G11B7/22; G02B6/122; G02B6/36; G02B6/42; G02B6/42C5A8; G02B6/42C5P; G11B7/12H; G11B7/125D; G11B7/135A; G11B7/135D; S02B6/12R9; S11B7/00S4M; S02B6/42C3;
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| U.S. Class: |
Current:
369/112.24;
359/362;
369/122;
385/014;
G9B/007.102;
G9B/007.108;
G9B/007.113;
G9B/007.116;
G9B/007.138;
Original:
369/112;
369/122;
359/362;
385/014;
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| Field of Search: |
369/122,112
359/642,900,362
427/162,164,165,167
437/051,60,80,225,915,924
257/082,99,432
385/014
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| Priority Number: |
| 1995-06-22 |
US1995000493240 |
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| Abstract: |
A monolithically integrated optical disk pickup head is comprised of three-dimensional collimating focusing lenses, a beam splitter and 45-degree reflectors that define an optical axis in free-space using surface micromachining technology to fabricate hinged vertical optical structures.
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| Attorney, Agent or Firm: |
Dawes, Daniel L. ;
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| Primary / Asst. Examiners: |
Epps, Georgia Y.; Chu, Kim-Kwok
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 21 claims |
We claim:
1. An optical pickup head for use with an optical disk comprising:
- a semiconductor substrate;
- a light source disposed on said substrate and extending thereabove to generate a light beam on an optical axis in free-space;
- a collimating lens having a hinge, which is surface micromachined from said substrate and vertically extended from said substrate by rotation about said hinge into said optical axis for receiving said light beam and producing a collimated light beam along said optical axis;
- a beam splitter with a hinge which is surfaced micromachined from said substrate and extended thereabove by rotation about said hinge into said optical axis for selectively reflecting a return beam on said optical axis from said optical disk;
- a focusing lens with a hinge which is surface micromachined from said substrate and rotated about said hinge into said optical axis for focusing said light beam onto said optical disk, for receiving from said optical disk a reflected beam, and for directing said reflected beam to said beam splitter; and
- a photodetector to which said reflected beam from said optical disk is directed by means in part by said beam splitter so that information on said optical disk is detected,
- whereby a single chip optical pickup head is economically fabricated.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 30 U.S. patent(s) that reference this one
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| Foreign References: |
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| Other Abstract Info: |
DERABS G1997-363250
DERABS G1997-363250
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| Other References: |
C.S.E. Miller, "Integrated Optics: An Introduction," Bell Systems Technology Journal, vol. 48, No. 7 pp. 2059-2068 (Sep. 1996).
H. Nishihara et al.,"Optical Integrated Circuits," McGraw Hill 1985.
T. Tamin, "Guided Wave Optoelectronics," Springer-Verlag (1990).
K.E. Petersen, "Silicon as a Mechanical Material," Proc. IEEE, vol. 70, No. 5, at 420-57 (1982).
(38 pages)
Cited by 179 patents
L.J. Hornbeck, "Deformable-Mirror Spatial Light Modulators," Proc. SPIE, vol. 1150, pp. 86-102 (1990).
M.T. Ching et al., "Microfabricated Optical Chopper," Proc. SPIE, vol. 1992 at 40-46 (1993).
K.S.J. Pister et al., "Microfabricated Hinges," Sensors and Actuators A, vol. 33, at 249-56 (1992).
(8 pages)
Cited by 42 patents
[ISI abstract]
T. Shiono et al., "Planar-Optic-Disk Pickup with Diffractive Microoptics," Applied Optics, vol. 33, No. 31 at 7350-7355, (Nov. 1994).
(6 pages)
Cited by 2 patents
[ISI abstract]
L.Y. Lin et al., "Three-Dimensional micro-Fresnel optical elements fabricated by micromaching technique," Electronics Letters vol. 30 No. 5 pp. 448-449 (3 Mar. 1994).
(2 pages)
[ISI abstract]
Wu et al., "Micromachined Free-Space Integrated Optics," Proc. SPIE vol. 2291, pp. 40-51 (1994).
Katayama et al., "Compact Optical Head Mobile Integrated with Chip Elements for Magneto-Optical Disks," SPIE vol. 2338, Optical Storage Data, pp. 268-275 (1994).
Micro-Machined Three-Dimensional Micro-Optics for Integrated Free-Space Optical System, by Lin et al., IEEE Photonics Tech Lett, vol. 6, No. 12 pp. 1445-1447 (1994).
(3 pages)
Cited by 5 patents
[ISI abstract]
"Microphotonic Device and Systems Research," BSAC News, Berkeley Sensor & Actuator Center, vol. 8, No. 2 (1994).
"7-9 February 1995 TI Demonstrates DMD Disply System," SPIE.
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