Nikon Corporation

Yamabiko Corporation

Tomoki Ito

Hiroshi Yamamoto

Takeshi Suzuki

Satoshi Miwa

Ayumu Makida

Masashi Yamashita

Atsushi Shibayama

Katsuya Watanabe

Keigo Koida

Azuna Nonaka

Yoko Komatsubara

Tomonori Kuribayashi

Motoyuki Ohtake

Satoshi Yamaguchi

Takayuki Yamamoto

Takeshi Umeda

Takeru Uehara

Hiroshi Yabumoto

Keisuke Tsubonoya

Toru Iwane

Kyoichi Suwa

Issei Tanaka

Keiko Mizuguchi

Osamu Tada

Masaki Takeda

Shunsuke Nakadate

Keita Kamo

Kyoya Tokunaga

Yoichi Miyahara

Masanori Ohtani

Mitsutane Chiba

An optical system (LS) has an aperture stop (S), and a positive lens (L) disposed closer to the object side than the aperture stop (S). The positive lens (L) satisfies the following conditional expressions.−0.010<1−(2.015−0.0068×ν1)50.00<ν1<65.000.545<θ1−0.010<θ1−(0.6418−0.00168×ν1)where ndP1 is the refractive index to the d line of the positive lens, νdP1 is the Abbe number with respect to the d line of the positive lens, and θgFP1 is the partial dispersion ratio of the positive lens.

Optical system, optical apparatus and method for manufacturing the optical system, and zoom optical system, optical apparatus and method for manufacturing the zoom optical system

A zoom optical system (ZL), comprises, in order from an object: a first lens group (G) having a positive refractive power; a second lens group (G) having a negative refractive power; a third lens group (G) having a positive refractive power; a fourth lens group (G) having a positive refractive power; a fifth lens group (G); and a sixth lens group (G). In the zoom optical system, upon zooming, a distance between the adjacent lens groups changes. The zoom optical system satisfies the following conditional expression.1.00<4/3<3.00

Zoom optical system, optical apparatus and method for manufacturing the zoom optical system

Comprising, in order from an object side: a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having positive refractive power, and a fifth lens group having negative refractive power; upon varying a magnification, the first lens group being fixed with respect to the image plane, and each distance between the neighboring lens groups being varied; upon focusing, at least a portion of the fourth lens group being moved; and predetermined conditional expression(s) being satisfied, thereby variations in various aberrations upon varying magnification being superbly suppressed.

Variable magnification optical system, optical device, and method for manufacturing variable magnification optical system

A zoom optical system (ZL) comprises, in order from an object: a first lens group (G) having a positive refractive power; and a second lens group (G) having a negative refractive power, wherein upon zooming, a distance between the adjacent lens groups changes. The zoom optical system further comprises an aperture stop (S) disposed closer to an image than the second lens group (G, and satisfies the following conditional expression:0.10<<0.90

This optical system (LS) has an aperture diaphragm (S) and a negative lens (L) disposed closer to an object side than the aperture diaphragm (S) and satisfies the following conditional expression.−0.010<1−(2.015−0.0068×ν1),50.00<ν1<65.00, 0.545<θ1,−0.010<θ1−(0.6418−0.00168×ν1). Where, ndN1 is a refractive index of the negative lens with respect to a d-line,

An optical system (LS) has a lens (L) that satisfies the following conditional expressions.−0.010<−(2.015−0.0068×ν)50.00<ν<65.00 0.545<θ−0.010<θ−(0.6418−0.00168×ν)

Optical system, optical apparatus and method for manufacturing the optical system

A zoom optical system includes, in order from an object, a first lens group, a second lens group, and a third lens group having positive, negative, and positive refractive powers, respectively. The first lens group moves toward the object and air distances between the first to third lens groups vary upon zooming from a wide-angle end state to a tele-photo end state. The first lens group comprises a cemented lens consisting of a negative lens and a positive lens in order from the object. The following conditional expressions are satisfied:4.40<1/(−2)<8.000.60<3/<3.500.60<(−2)/3<1.0530.00°<ω<80.000f1, f2, and f3 denoting focal lengths of the first to third lens groups, respectively, and fw and ow denoting a focal length of the zoom optical system and a half angle of view in the wide-angle end state, respectively.

Zoom optical system, imaging device and method for manufacturing the zoom optical system

A zoom optical system (ZL) comprises a first negative lens group (G) having a negative refractive power; and a second negative lens group (G) disposed closer to an image than the first negative lens group (G), wherein a distance between the first negative lens group (G) and the second negative lens group (G) changes during zooming, at least part of the first negative lens group (G) is movable so as to have a displacement component in a direction perpendicular to an optical axis, at least part of the second negative lens group (G) is movable along the optical axis during focusing, and the following conditional expression,0.50<<2.60is satisfied,where,

An optical system (LS) includes lenses (L,L) satisfying the following conditional expressions,νLZ<35.0, and0.702<θFLZ+(0.00316×νLZ),

Optical system, optical apparatus, and method of manufacturing optical system

An optical system (LS) has an aperture stop (S), and a negative lens (L) disposed closer to the image side than the aperture stop (S) and satisfying the following conditional expressions.−0.010<2−(2.015−0.0068×ν2),50.00<ν2<65.00,0.545<θ2,−0.010<θ2−(0.6418−0.00168×ν2)where ndN2 is the refractive index to the d line of the negative lens, νdN2 is the Abbe number with respect to the d line of the negative lens, and θgFN2 is the partial dispersion ratio of the negative lens.

There are provided an optical system having high resolution and high optical performance and reduced in size, an optical apparatus including the optical system, an imaging apparatus, and a method for manufacturing the optical system and imaging apparatus. An optical system UL of a camera module, which is incorporated in an optical apparatus, such as a camera, is an optical system that forms an image of an object, includes a correction member having a correction surface, a first reflection surface, which reflects light having passed through the correction surface, and a second reflection surface, which reflects the light reflected off the first reflection surface, and satisfies predetermined conditions.

Optical system, optical apparatus, imaging apparatus, and method for manufacturing optical system and imaging apparatus

An optical system (LS) includes lenses (L,L) satisfying the following conditional expressions,+(0.01425×)<2.12, andν35.0,where ndLZ: a refractive index of the lens with reference to d-line, and

A zoom optical system includes a positive first lens group, a negative second lens group disposed on an image side of the first lens group, a positive third lens group disposed on an image side of the second lens group, a negative fourth lens group disposed on an image side of the third lens group, and a final lens group disposed on an image side of the fourth lens group and closest to an image. During zooming, distances between lens groups change, and the first lens group moves along an optical axis. A negative focusing lens group is provided, and the final lens group is disposed on an image side of the focusing lens group. A negative vibration proof group of the second lens group may include, in order from an object, a negative lens, an air gap and a cemented lens of a negative lens and a positive lens. The final lens group may have negative refractive power.

An optical system (LS) Includes lenses (L22,L23) satisfying the following conditional expressions,&#x3c;35.0, and0.702&#x3c;&#x3b8;+(0.00316&#xd7;&#x3bd;),where &#x3bd;dLZ: Abbe number of the lens with reference to d-line, and

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Tomoki Ito