Zoom lens and optical apparatus having the same

Details Zoom lens and optical apparatus having the same Zoom lens and optical apparatus having the same

1998-04-03

2000-08-15

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359676, G02C 1514

Patent

active

061045470

ABSTRACT:
A zoom lens includes, in order from an object side to an image side, a first lens unit of positive refractive power, a second lens unit of negative refractive power, a third lens unit of positive refractive power, the third lens being composed of a single lens, and a fourth lens unit of positive refractive power, the fourth lens unit being composed of not less than four lenses including at least one negative lens, wherein, during zooming, the first lens unit and the third lens unit are stationary and the second lens unit and the fourth lens unit move along an optical axis.

REFERENCES:
patent: 4859042 (1989-08-01), Tanaka
patent: 5147826 (1992-09-01), Liu et al.
patent: 5219786 (1993-06-01), Noguchi
patent: 5275851 (1994-01-01), Fonash et al.
patent: 5366926 (1994-11-01), Mei
patent: 5403772 (1995-04-01), Zhang et al.
patent: 5426064 (1995-06-01), Zhang et al.
patent: 5481121 (1996-01-01), Zhang et al.
patent: 5488000 (1996-01-01), Zhang et al.
patent: 5492843 (1996-02-01), Adachi et al.
patent: 5501989 (1996-03-01), Takayama et al.
patent: 5508533 (1996-04-01), Takemura
patent: 5529937 (1996-06-01), Zhang et al.
patent: 5534716 (1996-07-01), Takemura
patent: 5543352 (1996-08-01), Ohtani et al.
patent: 5550070 (1996-08-01), Funai
patent: 5563426 (1996-10-01), Zhang et al.
patent: 5569610 (1996-10-01), Zhang et al.
patent: 5569936 (1996-10-01), Zhang et al.
patent: 5580792 (1996-12-01), Zhang et al.
patent: 5585291 (1996-12-01), Ohtani et al.
patent: 5589694 (1996-12-01), Takayama et al.
patent: 5595923 (1997-01-01), Zhang et al.
patent: 5595944 (1997-01-01), Zhang et al.
patent: 5604360 (1997-02-01), Zhang et al.
patent: 5605846 (1997-02-01), Ohtani et al.
patent: 5606179 (1997-02-01), Yamazaki et al.
patent: 5608232 (1997-03-01), Yamazaki et al.
patent: 5612250 (1997-03-01), Ohtani et al.
patent: 5614426 (1997-03-01), Funada et al.
patent: 5614733 (1997-03-01), Zhang et al.
patent: 5616506 (1997-04-01), Takemura
patent: 5620910 (1997-04-01), Teramoto
patent: 5621224 (1997-04-01), Yamazaki et al.
patent: 5624851 (1997-04-01), Takayama et al.
patent: 5637515 (1997-06-01), Takemura
patent: 5639698 (1997-06-01), Yamazaki et al.
patent: 5643826 (1997-07-01), Ohtani et al.
patent: 5646424 (1997-07-01), Zhang et al.
patent: 5654203 (1997-08-01), Ohtani et al.
patent: 5656825 (1997-08-01), Kusumoto et al.
patent: 5663077 (1997-09-01), Adachi et al.
patent: 5700333 (1997-12-01), Yamazaki et al.
R. Kakkad et al., "Crystallized Si films by low-temperature rapis thermal annealing of amorphous silicon," J. Appl. Phys., vol. 65, No. 5, Mar. 1, 1989, pp. 2069-2072.
G. Liu et al., "Polycrystalline silicon thin film transistors on Corning 7059 glass substrates using short time, low-temperature processing," Appl. Phys. Lett., vol. 62, No. 20, May 17, 1993, pp. 2554-2556.
G. Liu et al., "Selective area crystallization of amorphous silicon films by low-temperature rapid thermal annealing," Appl. Phys. Lett., vol. 55, No. 7, Aug. 14, 1989, pp. 660-662.
R. Kakkad et al., "Low Temperature Selective Crystallization of Amorphous Silicon," Journal of Non-Crystalline Solids, vol. 115, 1989, pp. 66-68.
C. Hayzelden et al., "In Situ Transmission Electron Microscopy Studies of Silicide-Mediated Crystallization of Amorphous Silicon", (3 pages).
A.V. Dvurechenskii et al., "Transport Phenomena in AMorphous Silicon Doped by Ion Implanation of 3d Metals", Akademikian Lavrentev Prospekt 13, 630090 Novosibirsk 90, USSR, pp. 635-640.
T. Hempel et al., "Needle-Like Crsyatllization of Ni Doped Amorphous Silicon Thin Films", Solid State Communications, vol. 85, No. 11, pp. 921-924, 1993.
K. Kugiyama et al., "CW Laser Annealing of Polycrystalline Silicon on SiO2 and effects of Successive Furnace Annealing", J.J. Appl. Phys., vol. 21, No. 1, Jan. 1982.

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