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Zoom lens, optical apparatus and method for manufacturing zoom lens

A zoom lens and lens technology, applied in the field of zoom lens, can solve the problems of not small enough size and not good optical performance, etc., and achieve the effect of high resolution and excellent optical performance

Active Publication Date: 2012-08-29
NIKON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the conventional zoom lens, there have been problems that the optical performance is not good enough especially in the wide-angle side, and its size is not small enough

Method used

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  • Zoom lens, optical apparatus and method for manufacturing zoom lens
  • Zoom lens, optical apparatus and method for manufacturing zoom lens
  • Zoom lens, optical apparatus and method for manufacturing zoom lens

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0114] figure 1 It is a cross-sectional view of the lens configuration of the zoom lens according to Example 1 of the present application shown together with the movement trajectory of each lens group.

[0115] The zoom lens according to Example 1 is composed of a first lens group G1 having negative refractive power and a second lens group G2 having positive refractive power in order from the object side.

[0116] The first lens group G1 is composed of the following in order from the object side: a negative meniscus lens L11 having a convex surface facing the object side, a negative meniscus lens L12 having a convex surface facing the object side, and A cemented lens constructed by cementing a negative meniscus lens L13 with a convex surface facing the object side and a positive meniscus lens L14 with a convex surface facing the object side.

[0117] The second lens group G2 is composed of the following in order from the object side: a positive meniscus lens L21 having a convex surfa...

example 2

[0139] Figure 4 It is a cross-sectional view of the lens configuration of the zoom lens according to Example 2 of the present application shown together with the movement trajectory of each lens group.

[0140] The zoom lens according to Example 2 is composed of a first lens group G1 having negative refractive power and a second lens group G2 having positive refractive power in order from the object side.

[0141] The first lens group G1 is composed of the following in order from the object side: a negative meniscus lens L11 having a convex surface facing the object side, a negative meniscus lens L12 having a convex surface facing the object side, and A cemented lens constructed by cementing a negative meniscus lens L13 with a convex surface facing the object side and a positive meniscus lens L14 with a convex surface facing the object side.

[0142] The second lens group G2 is composed of, in order from the object side, a positive meniscus lens L21 having a convex surface facing th...

example 3

[0155] Figure 7 It is a cross-sectional view of the lens configuration of the zoom lens according to Example 3 of the present application shown together with the movement trajectory of each lens group.

[0156] The zoom lens according to Example 3 is composed of a first lens group G1 having negative refractive power and a second lens group G2 having positive refractive power in order from the object side.

[0157] The first lens group G1 is composed of the following in order from the object side: a negative meniscus lens L11 having a convex surface facing the object side, a negative meniscus lens L12 having a convex surface facing the object side, and a negative meniscus lens L12 having a convex surface facing the object side. A negative meniscus lens L13 with a convex surface on the side, and a positive meniscus lens L14 with a convex surface facing the object side.

[0158] The second lens group G2 is composed of the following in order from the object side: a positive meniscus len...

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Abstract

A zoom lens consisting of, in order from an object side: a first lens group G1 having negative refractive power; and a second lens group G2 having positive refractive power, the first lens group G1 including, in order from the object side, a first negative meniscus lens having a convex surface facing the object side, a negative lens, a second negative meniscus lens having a convex surface facing the object side, and a positive lens, a distance between the first lens group G1 and the second lens group G2 being varied thereby carrying out zooming, and given conditional expressions being satisfied, thereby providing a zoom lens having excellent optical performance and high resolution with being compact and lightweight, an optical apparatus, and a method for manufacturing the zoom lens.

Description

[0001] The disclosure of the following priority applications is hereby incorporated by reference: [0002] Japanese Patent Application No. 2011-038968 filed on February 24, 2011. Technical field [0003] The present invention relates to a zoom lens, an optical device and a method for manufacturing the zoom lens. Background technique [0004] Many zoom lenses composed of a first lens group having negative refractive power (refractive power) and a second lens group having positive refractive power in order from the object side have been proposed (for example, see Japanese Patent Application Publication No. .2005-062770 and 2001-330774). However, in the conventional zoom lens, there have been problems that, particularly in the wide-angle side, the optical performance is not good enough, and the size thereof is not small enough. On the other hand, in order to increase optical performance, the zoom lens must be large and heavy, or the zoom lens must use an aspheric lens that cannot be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/177G02B3/02G03B17/12
CPCG02B15/177G02B15/1425G02B15/142Y10T29/49826G02B27/646
Inventor 木村阳子
Owner NIKON CORP
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