ZOOMING OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR MANUFACTURING ZOOMING OPTICAL SYSTEM

WIPO Patent Application WO/2013/129490

A1

Provided are a zooming optical system, an optical device, and a method for manufacturing a zooming optical system, the zooming optical system being small-sized and having, in order along the optical axis from the object, a first lens group (G1) having a positive refractive power, a second lens group (G2) having a negative refractive power, a third lens group (G3) having a positive refractive power, a fourth lens group (G4) having a negative refractive power, and a fifth lens group (G5) having a negative refractive power, and the interval between the first lens group (G1) and the second lens group (G2), the interval between the second lens group (G2) and the third lens group (G3), the interval between the third lens group (G3) and the fourth lens group (G4), and the interval between the fourth lens group (G4) and the fifth lens group (G5) being varied during zooming from a wide-angle-end state to a telephoto-end state, thereby providing a high zoom ratio and high optical performance.

JP3008715	ZOOM LENS
WO/2016/104331	PROJECTION LENS BARREL AND PROJECTOR
JP2021096331	ZOOM OPTICAL SYSTEM, IMAGE CAPTURING OPTICAL SYSTEM, AND IMAGE CAPTURING DEVICE HAVING THE SAME

OBAMA AKIHIKO (JP)

PCT/JP2013/055180

September 06, 2013

February 27, 2013

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NIKON CORP (JP)

G02B15/20; G02B13/18

JP2006184430A	2006-07-13
JPS63205628A	1988-08-25
JPH10186234A	1998-07-14
JPH01252915A	1989-10-09

INOUE, Yoshio et al. (JP)
Yoshio Inoue (JP)

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