Zoom lens and photographing apparatus having the same

a zoom lens and photographing equipment technology, applied in the field of wide angle zoom lenses and photographing equipment, can solve the problems of high proficiency in using such devices, size and weight problems, etc., and achieve the effects of low f-number, wide angle of view, and high magnification

Active Publication Date: 2012-05-03
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a zoom lens with a wide angle of view, high magnification, and low F-number. The lens includes a first lens group with a positive refractive power, a second lens group with a negative refractive power, a third lens group with a positive refractive power, and a fourth lens group with a positive refractive power. The second lens group includes a first aspherical lens with a negative refractive power and a second aspherical lens with a positive refractive power. The third lens group includes at least four lenses, and the fourth lens group includes a meniscus lens. The lens has a wide angle of view, high magnification, and low F-number. The zoom lens can be used in a photographing apparatus.

Problems solved by technology

Also, nowadays, many users have become highly proficient in using such devices.
Some zoom lenses only have a wide angle of view or high magnification, or other zoom lenses have a low FNO and high brightness but include an optical system with a fixed focal length or have a complicated lens structure causing size and weight problems.

Method used

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  • Zoom lens and photographing apparatus having the same
  • Zoom lens and photographing apparatus having the same
  • Zoom lens and photographing apparatus having the same

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0060]FIG. 1 illustrates a zoom lens according to a first embodiment of the invention, and Table 1 shows design data related to the first embodiment. Although reference numerals of lens surfaces in each lens are indicated in FIG. 1, reference numerals of lens surfaces will be omitted in other drawings related to other embodiments.

TABLE 1Lens Radius ofRefractiveAbbesurfacecurvatureThicknessindex (nd)number (vd)S131.3430.901.94617.98S223.6464.141.78945.61S3160.170D1S4*719.8211.001.80540.90S5*9.4664.04S6−75.1000.551.58658.65S719.3580.20S8*15.9881.922.00319.32S9*39.523D2STinfinity0.60S11*8.0882.601.74048.50S12*−39.7670.20S136.9001.621.49781.61S14−63.7260.451.75028.56S154.6710.61S165.8921.211.49781.61S176.644D3S18*9.9041.801.80540.90S19*23.507D4S20infinity0.301.51764.17S21infinity0.80S22infinity0.501.51764.17S23infinityD5S24infinityD6f; 6~17.22~30Fno; 2.28~2.72~3.052ω; 85.79~29.88~17.15

In Table 1, the mark * indicates an aspherical surface. Table 2 below shows aspherical coefficients in ...

second embodiment

[0063]FIG. 3 illustrates a zoom lens according to a second embodiment of the invention, and Table 4 shows design data related to the second embodiment.

TABLE 4Lens Radius ofThick-RefractiveAbbesurfacecurvaturenessindex (nd)number (vd)S132.5780.901.94617.98S223.7144.891.83637.77S3109.519D1S4*200.0001.001.80540.90S5*7.2125.26S6−10.8890.711.77249.66S7−44.5690.20S8*343.7561.642.00319.32S9*−23.248D2STinfinity0.30S11*7.9133.831.74048.50S12*−101.5700.51S1311.8651.261.49781.61S1422.3770.501.92621.15S156.0540.84S1611.7422.041.60160.92S17−57.346D3S18*12.5861.791.80540.90S1926.009D4S20infinity0.301.51764.17S21infinity0.30S22infinity0.501.51764.17S23infinityD5S24infinityD6f; 5.36~10.99~18.19Fno; 1.43~1.83~2.002ω; 89.41~46.38~28.16

[0064]Table 5 below shows aspherical coefficients in the second embodiment.

TABLE 5LenssurfaceKABCDS41.000000 1.479285E−04−1.970853E−06  2.044097E−08−9.124265E−11S50.181270−3.869616E−05 3.430784E−07−4.665099E−08 3.553906E−10S8−3797.713978 1.177174E−05−8.816590E−08 0.0000...

third embodiment

[0067]FIG. 5 illustrates a zoom lens according to a third embodiment of the invention, and Table 7 shows design data related to the second embodiment.

TABLE 7Lens Radius ofThick-RefractiveAbbesurfacecurvaturenessindex (nd)number (vd)S124.6430.901.94617.98S218.7944.181.78644.30S3117.085D1S4*90.9271.101.80540.90S5*6.1654.99S6−20.8370.601.72751.90S738.5920.30S821.1632.302.00319.32S9*69300.333D2STinfinity0.60S11*8.6602.221.76150.15S12*−20.4360.83S1315.4101.661.48770.40S14−30.4210.5084.05124.06S157.3201.13S16−15.1501.611.48770.40S17−7.005D3S18*9.1672.601.62159.93S1921.063D4S20infinity0.301.51764.17S21infinity0.30S22infinity0.501.51764.17S23infinityD5S24infinityD6f; 6.00~10.33~16.18Fno; 1.90~2.14~2.42ω; 79.48~48.83~31.75

[0068]Table 8 below shows aspherical coefficients in the third embodiment.

TABLE 8LenssurfaceKABCDS41.000000 7.569433E−05−2.032430E−06 1.835288E−08−5.102322E−11S5−0.148922 2.037117E−05 1.000353E−06−1.302579E−07−1.267899E−09S9−59045089400675.200000−3.419725E−06−3.299992E−07 0...

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Abstract

A zoom lens and a photographing apparatus having the zoom lens including a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; and a fourth lens group having a positive refractive power, wherein the first lens group, the second lens group, the third lens group, and the fourth lens group are arranged sequentially from an object side, wherein the second lens group includes a first aspherical lens having a negative refractive power, and a second aspherical lens having a positive refractive power.

Description

CROSS-REFERENCE TO RELATED PATENT APPLICATION[0001]This application claims the benefit of Korean Patent Application No. 10-2010-0105388, filed on Oct. 27, 2010, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.BACKGROUND[0002]1. Field of the Invention[0003]The present disclosure relates to a wide angle zoom lens and a photographing apparatus having the same.[0004]2. Description of the Related Art[0005]With respect to optical systems including digital cameras, interchangeable lens systems, video cameras, or similar apparatuses which use a solid-state imaging device such as a charge coupled device (CCD), users require not only high resolution devices but also devices having a wide angle of view and high magnification function. Also, nowadays, many users have become highly proficient in using such devices. Accordingly, it is necessary to develop a lens system having a wide angle of view, high magnification, and a lo...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G02B15/14
CPCG02B15/173G02B15/144113
InventorKIM
OwnerSAMSUNG ELECTRONICS CO LTD