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Zoom lens system and electronic image pickup apparatus using the same

A zoom lens and lens technology, applied in the parts of TV system, image communication, TV, etc., can solve the problem of small size, which is not conducive to high zoom ratio and compactness, and cannot fully utilize the first lens unit and the second lens unit Issues such as outer diameter and thickness

Active Publication Date: 2008-05-21
奥之心数字科技株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when each lens unit is set in a retracted state, the thickness of the cam for moving the lens unit is increased more than necessary, and this structure is not conducive to simultaneously achieving a high zoom ratio and compactness
[0009] Also, since the air space between the second lens unit and the third lens unit is relatively long at the wide-angle end, as a result, the height of the light rays reaching the first lens unit and the second lens unit becomes relatively high, therefore, the The arrangement structure makes it impossible to fully exert the function of reducing the outer diameter and thickness of the first lens unit and the second lens unit
[0010] Also, lenses with aspheric surfaces have a greater difference in shape between the object-side surface and the image-side surface, and optical performance tends to deteriorate if the lens is assembled by being guided in the opposite direction when assembled in the lens frame

Method used

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  • Zoom lens system and electronic image pickup apparatus using the same
  • Zoom lens system and electronic image pickup apparatus using the same
  • Zoom lens system and electronic image pickup apparatus using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0495] r 1 =21.698 d 1 =0.80n d1 =2.00170v d1 =20.64

[0496] r 2 =17.688 d 2 =4.06n d2 =1.49700 v d2 =81.54

[0497] r 3 =-29.133(A)d 3 = (variable)

[0498] r 4 =-12.208(A)d 4 =0.90n d3 = 1.80610 v d3 =40.88

[0499] r 5 =5.778(A)d 5 =0.98

[0500] r 6 =9.168 d 6 =1.90n d4 = 1.92286 v d4 =18.90

[0501] r 7 =26.277 d 7 = (variable)

[0502] r 8 =∞d 8 =0.98

[0503] r 9 =∞(S)d 9 =-0.10

[0504] r 10 =4.600(A)d 10 =3.01n d5 =1.49700 v d5 =81.54

[0505] r 11 =-11.717(A)d 11 =0.20

[0506] r 12 =4.992 d 12 =1.26n d6 =1.60342V d6 =38.03

[0507] r 13 =8.287 d 13 =0.39n d7 =2.00330V d7 =28.27

[0508] r 14 =3.230d 14 =0.70

[0509] r 15 =∞ d 15 = (variable)

[0510] r 16 =24.719(A)d 16 =1.93n d8 =1.74330 v d8 =49.33

[0511] r 17 =-69.248 d 17 = (variable)

[0512] r 18 =∞ d 18 =0.50n d9 =1.51633V d9 =64.14

[0513] r 19 =∞ d 19 =0.50

[0514] r 20 =∞ d 20 =0.50n d10 =1.51633V d10 =64.14

[0515] r 21 =∞...

Embodiment 2

[0558] r 1 =20.645 d 1 =0.80n d1 =2.00170v d1 =20.64

[0559] r 2 =16.835 d 2 =4.25n d2 =1.49700 v d2 =81.54

[0560] r 3 =-26.751(A)d 3 = (variable)

[0561] r 4 -14.412(A)d 4 =0.94n d3 = 1.88300 v d3 =40.76

[0562] r 5 =5.846(A)d 5 =0.80

[0563] r 6 =8.130 d 6 =2.01n d4 = 1.92286 v d4 =18.90

[0564] r 7 =19.830 d 7 = (variable)

[0565] r 8 =∞d 8 =0.98

[0566] r 9 =∞(S)d 9 =-0.10

[0567] r 10 =4.569(A)d 10 =3.11n d5 =1.49700 v d5 =81.54

[0568] r 11 =-12.606(A)d 11 =0.23

[0569] r 12 =4.855 d 12 =1.20n d6 =1.60342V d6 =38.03

[0570] r 13 =7.083 d 13 =0.39n d7 =2.00330V d7 =28.27

[0571] r 14 =3.164d 14 =0.70

[0572] r 15 =∞d 15 = (variable)

[0573] r 16 =20.534(A)d 16 =2.09n d8 =1.74330 v d8 =49.33

[0574] r 17 =-174.515 d 17 = (variable)

[0575] r 18 =∞d 18 =0.50n d9 =1.51633V d9 =64.14

[0576] r 19 =∞d 19 =0.50

[0577] r 20 =∞d 20 =0.50n d10 =1.51633V d10 =64.14

[0578] r 21 =∞d 2...

Embodiment 3

[0621] r 1 =22.538 d 1 =0.80n d1 =2.00170V d1 =20.64

[0622] r 2 =18.176 d 2 =4.07n d2 =1.49700 v d2 =81.54

[0623] r 3 =-27.449(A)d 3 = (variable)

[0624] r 4 =-11.281(A)d 4 =0.90n d3 = 1.80610 v d3 =40.88

[0625] r 5 =6.540(A)d 5 =0.99

[0626] r 6 =10.399 d 6 =1.88n d4 =2.10227 v d4 =17.10

[0627] r 7 =22.503 d 7 = (variable)

[0628] r 8 =∞ d 8 =0.98

[0629] r 9 =∞(S)d 9 =-0.10

[0630] r 10 =4.505(A)d 10 =3.06n d5 =1.49700 v d5 =81.54

[0631] r 11 =-11.895(A)d 11 =0.22

[0632] r 12 =5.146 d 12 =1.18n d6 =1.60342V d6 =38.03

[0633] r 13 =7.646 d 13 =0.39n d7 =2.00330V d7 =28.27

[0634] r 14 =3.245 d 14 =0.70

[0635] r 15 =∞d 15 = (variable)

[0636] r 16 =24.762(A)d 16 =2.06n d8 =1.74330 v d8 =49.33

[0637] r 17 =-66.758 d 17 = (variable)

[0638] r 18 =∞d 18 =0.50n d9 =1.51633V d9 =64.14

[0639] r 19 =∞d 19 =0.50

[0640] r 20 =∞d 20 =0.50n d10 =1.51633V d10 =64.14

[0641] r 21 =∞d 2...

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Abstract

A four-unit zoom lens system includes in order from an object side, a first lens unit having a positive refracting power, a second lens unit having a negative refracting power, a third lens unit having a positive refracting power, and a fourth lens unit having a positive refracting power, in which at a time of zooming from a wide angle end to a telephoto end, at least the first lens unit, the second lens unit, and the third lens unit move, and a space between the lens units changes, and a total number of lenses in the second lens unit is not more than three, and the zoom lens system satisfies the following conditional expressions.1.2<(beta2t / beta2w) / (beta3t / beta3w)<6.0 and (1A)3.0 G02B 15 / 16 G02B 15 / 173 G02B 9 / 34 G02B 13 / 18 H04N 5 / 225 30 80 10 2007 / 11 / 15 101183172 2008 / 5 / 21 000000000 Olympus Image Corp. Japan Miyajima Toru lihui 11127 San You Patent Agency No.201 Entrance 1, Building 13, the East of Jinmenli, Haidian District, Beijing 100088 Japan 2006 / 11 / 15 2006-309666 Japan 2007 / 6 / 21 2007-163571

Description

technical field [0001] The present invention relates to a zoom lens system and an electronic image pickup device using the same, and more particularly, to an electronic image pickup device such as a video camera and a digital video camera that achieve miniaturization. Background technique [0002] In recent years, instead of silver salt film cameras, digital cameras in which objects are photographed using solid image pickup components such as CCD (Charge Coupled Device) and CMOS (Complementary Metal Oxide Semiconductor) have become mainstream. Also, there are several categories of digital video cameras in a wide range from a high-function type for professional use to a compact and popular type. [0003] Users of popular types of digital video cameras try to easily enjoy shooting with a wide field of view anytime and anywhere. In this regard, small video cameras, particularly thin digital video cameras that can be easily accommodated in a pocket or bag of clothing and are co...

Claims

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Application Information

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IPC IPC(8): G02B15/16G02B15/173G02B9/34G02B13/18H04N5/225
Inventor 宫岛徹
Owner 奥之心数字科技株式会社
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