Optical element, optical lens, optical head apparatus,...

Details Optical element, optical lens, optical head apparatus,... Optical element, optical lens, optical head apparatus,...

2007-07-24

2007-07-24

Lavarias, Arnel (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S015000, C369S112030, C369S112080

Reexamination Certificate

active

10716990

ABSTRACT:
An optical lens includes a hologram, a refractive lens, and a phase level difference. The hologram has a sawtooth shape grating having a sawtooth shape in cross-section, and generates +2nd-order diffracted light most strongly with respect to blue light and +1st-order diffracted light most strongly with respect to red light, by setting a height of the sawtooth shape grating. The +2nd-order diffracted light of blue light is condensed through a substrate with a thickness t1, and the +1st-diffracted light of red light is condensed through a substrate with a thickness t2(t1<t2). The difference in optical path length occurring when the blue light passes through the phase level difference is five times the wavelength of the blue light.

REFERENCES:
patent: 5446565 (1995-08-01), Komma et al.
patent: 6084843 (2000-07-01), Abe et al.
patent: 6118594 (2000-09-01), Maruyama
patent: 6166854 (2000-12-01), Katsuma
patent: 6201780 (2001-03-01), Katayama
patent: 6442124 (2002-08-01), Chung et al.
patent: 6449095 (2002-09-01), Ohtaki et al.
patent: 6760295 (2004-07-01), Maruyama
patent: 6834036 (2004-12-01), Shiono et al.
patent: 6898168 (2005-05-01), Kimura et al.
patent: 6928035 (2005-08-01), Komma et al.
patent: 6992967 (2006-01-01), Jeong
patent: 2001/0000135 (2001-04-01), Mori et al.
patent: 2003/0151996 (2003-08-01), Hendriks et al.
patent: 2003/0227858 (2003-12-01), Komma
patent: 2004/0170106 (2004-09-01), Komma
patent: 2005/0152036 (2005-07-01), Shiono et al.
patent: 2005/0249099 (2005-11-01), Komma
patent: 0 610 055 (1994-08-01), None
patent: 0 731 459 (1996-09-01), None
patent: 0 747 893 (1996-12-01), None
patent: 0 831 466 (1998-03-01), None
patent: 0 936 604 (1999-08-01), None
patent: 1 001 414 (2000-05-01), None
patent: 1 500 956 (2005-01-01), None
patent: 7-098431 (1995-04-01), None
patent: 9-306018 (1997-11-01), None
patent: 10-106016 (1998-04-01), None
patent: 10-334504 (1998-12-01), None
patent: 11-23819 (1999-01-01), None
patent: 11-296890 (1999-10-01), None
patent: 11-339307 (1999-12-01), None
patent: 2000-081566 (2000-03-01), None
patent: 2000-260056 (2000-09-01), None
patent: 2001-6203 (2001-01-01), None
patent: 2001-43559 (2001-02-01), None
patent: 2001-60336 (2001-03-01), None
patent: 2001-93179 (2001-06-01), None
patent: 2001-209966 (2001-08-01), None
patent: 2002-237078 (2002-08-01), None
patent: WO 02/21522 (2002-03-01), None
patent: 02/082437 (2002-10-01), None
patent: WO 03/060891 (2003-07-01), None
Katayama et al., “Dual Wavelength Optical Head for 0.6 mm and 1.2 mm Substrate Thickness”, Japanese Journal of Applied Physics (1997); 36: 460-466.
Katayama, R. et al., “BLUE/DVD/DC Compatible Optical Head With Three Wavelengths and a Wavelength Selective Filter”,ISOM 2001 Technical Digest Session We-30-05, p. 30-31.
Nishioka et al., “BD/DVD/CD Compatible Optical Pick-up Technology”, Extend Abstracts (The 50th Spring Meeting 2003); The Japan Society of Applied Physics and Related Societies, 27 p-ZW-10, Kanagawa University, Mar. 2003 (with partial translation).
N. Kaiho, et al., “DVD/CD Compatibility using Blu-ray Disc Pick Up”, Extended Abstracts (The 63rd Autumn Meeting, 2002); The Japan of Applied Physics, No. 3, Sep. 2002, 27p-YD-5, pp. 1008 (with partial translation).
European Search Report mailed Sep. 25, 2006 for co-pending EP application 03013076.9.

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