Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2006-01-10
2006-01-10
Assaf, Fayez G. (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C359S573000, C359S566000, C359S015000, C359S001000, C369S112010, C369S109010
Reexamination Certificate
active
06985293
ABSTRACT:
An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an objective lens having a focal length of an information recording surface in the DVD, an optical path control unit controls the light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit, and a phase shift unit between the optical path control unit and the objective lens and which shifts a phase of the second light to reduce the size of a beam spot which is formed the information recording surface in the CD-R.
REFERENCES:
patent: 2233591 (1941-03-01), Dulovits
patent: 3305294 (1967-02-01), Alverez
patent: 3958884 (1976-05-01), Smith
patent: 4074314 (1978-02-01), Velzel et al.
patent: 4210391 (1980-07-01), Cohen
patent: 4266534 (1981-05-01), Ogawa
patent: 4340283 (1982-07-01), Cohen
patent: 4501493 (1985-02-01), Kubota
patent: 4545653 (1985-10-01), Brenden et al.
patent: 4566762 (1986-01-01), Kato
patent: 4612437 (1986-09-01), Ohsato
patent: 4631397 (1986-12-01), Ohsato et al.
patent: 4733943 (1988-03-01), Suzuki et al.
patent: 4741605 (1988-05-01), Alfredsson et al.
patent: 4904856 (1990-02-01), Nagahama et al.
patent: 4918679 (1990-04-01), Opheij et al.
patent: 4929823 (1990-05-01), Kato et al.
patent: 4938573 (1990-07-01), Saito
patent: 4995714 (1991-02-01), Cohen
patent: 4995715 (1991-02-01), Cohen
patent: 5097464 (1992-03-01), Nishiuchi et al.
patent: 5120120 (1992-06-01), Cohen
patent: 5132843 (1992-07-01), Aoyama et al.
patent: 5142411 (1992-08-01), Fiala
patent: 5153778 (1992-10-01), Sasian-Alvarado
patent: 5161040 (1992-11-01), Yokoyama et al.
patent: 5161148 (1992-11-01), Hori et al.
patent: 5164584 (1992-11-01), Wike, Jr. et al.
patent: 5195072 (1993-03-01), Fukui et al.
patent: 5231624 (1993-07-01), Finegan
patent: 5235581 (1993-08-01), Miyagawa et al.
patent: 5303221 (1994-04-01), Maeda et al.
patent: 5345072 (1994-09-01), Hayashi et al.
patent: 5349471 (1994-09-01), Morris et al.
patent: 5386319 (1995-01-01), Whitney
patent: 5438187 (1995-08-01), Reddersen et al.
patent: 5446565 (1995-08-01), Komma et al.
patent: 5473471 (1995-12-01), Yamagata et al.
patent: 5496995 (1996-03-01), Kato et al.
patent: 5513158 (1996-04-01), Ohsato
patent: 5526338 (1996-06-01), Hasman et al.
patent: 5583843 (1996-12-01), Horinouchi
patent: 5587981 (1996-12-01), Kamatani
patent: 5612942 (1997-03-01), Takahashi
patent: 5615199 (1997-03-01), Tatsuno et al.
patent: 5615200 (1997-03-01), Hoshino et al.
patent: 5638353 (1997-06-01), Takahashi
patent: 5659533 (1997-08-01), Chen et al.
patent: 5665957 (1997-09-01), Lee et al.
patent: 5696750 (1997-12-01), Katayama
patent: 5703856 (1997-12-01), Hayashi et al.
patent: 5703862 (1997-12-01), Lee et al.
patent: 5708638 (1998-01-01), Braat et al.
patent: 5717674 (1998-02-01), Mori et al.
patent: 5724335 (1998-03-01), Kobayashi
patent: 5734512 (1998-03-01), Shin et al.
patent: 5734637 (1998-03-01), Ootaki et al.
patent: 5737300 (1998-04-01), Ota et al.
patent: 5754512 (1998-05-01), Komma et al.
patent: 5768242 (1998-06-01), Juday
patent: 5777803 (1998-07-01), Ju et al.
patent: 5777973 (1998-07-01), Yoo et al.
patent: 5790503 (1998-08-01), Mizuno et al.
patent: 5796683 (1998-08-01), Sumi et al.
patent: 5815293 (1998-09-01), Komma et al.
patent: 5844879 (1998-12-01), Morita et al.
patent: 5917800 (1999-06-01), Choi
patent: 5930214 (1999-07-01), Kasahara et al.
patent: 5986779 (1999-11-01), Tanaka
patent: 6052237 (2000-04-01), Opheij et al.
patent: 7263552 (1942-10-01), None
patent: 0587297 (1994-03-01), None
patent: 0747893 (1996-12-01), None
patent: 0803867 (1997-10-01), None
patent: 508448 (1939-06-01), None
patent: 62-73429 (1987-04-01), None
patent: 5-81698 (1993-04-01), None
patent: 5-241111 (1993-09-01), None
patent: 5-313100 (1993-11-01), None
patent: 5-342618 (1993-12-01), None
patent: 6-96466 (1994-04-01), None
patent: 6-259804 (1994-09-01), None
patent: 7-65407 (1995-03-01), None
patent: 07-098431 (1995-11-01), None
patent: 07-302437 (1995-11-01), None
patent: 7-302437 (1995-11-01), None
patent: 7-311969 (1995-11-01), None
patent: 8-055363 (1996-02-01), None
patent: 9-27138 (1997-01-01), None
patent: 9-198699 (1997-07-01), None
patent: 4-178931 (1998-06-01), None
Y. Komma et al., “Dual focus optical head for 0.6 mm and 1.2 mm disks,” Optical Data Storage, SPIE vol. 2338, 1994, pp. 282-288.
Takagi et al., “DVD/CD Compatible Pick-up with Liquid Crystal Shutter,” IEEE (1997).
M. Shinoda et al., “Two-Element Objective Lenses and Spherical Aberration Correction for DVR,” IEEE Transactions on Consumer Electronics, vol. 42, No. 3, pp. 808-813 (Aug. 1996).
U.S. Appl. No. 09/594,509, filed Jun. 16, 2000, Jang-hoon Yoo et al.
Cho Kun Ho
Choi Hyun Seob
Chung Chong Sam
Kim Tae Kyung
Lee Chul Woo
Assaf Fayez G.
Samsung Electronics Co,. Ltd.
Stein, McEwen & Bui LLP
LandOfFree
Optical pickup using an optical phase plate and which is... 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 pickup using an optical phase plate and which is..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup using an optical phase plate and which is... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3599515