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Three-unit zoom lens and image pickup device with same

A zoom lens and three-unit technology, applied in image communication, electrical components, optical components, etc., can solve the problem of large focal length ratio of three-unit zoom lens

Inactive Publication Date: 2012-10-10
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The f-number of the three-unit zoom lens disclosed in Japanese Patent Laid-Open No. 2007-148052 is large

Method used

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  • Three-unit zoom lens and image pickup device with same
  • Three-unit zoom lens and image pickup device with same
  • Three-unit zoom lens and image pickup device with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0301] unit mm

[0302] surface data

[0303] surface number r d nd vd

[0304] 1 * -75.732 0.80 1.80610 40.92

[0305] 2 * 6.159 2.19

[0306] 3 8.286 1.26 1.92286 18.90

[0307] 4 12.932 variable

[0308] 5(S) ∞ 0.00

[0309] 6 * 4.218 1.58 1.58313 59.38

[0310] 7 * -11.614 0.10

[0311] 8 6.020 1.50 1.92286 18.90

[0312] 9 2.854 variable

[0313] 10 -10.000 0.80 1.52542 55.78

[0314] 11 -12.633 0.10

[0315] 12 1570.615 1.68 1.52542 55.78

[0316] 13 * -7.877 variable

[0317] 14 ∞ 0.50 1.54771 62.84

[0318] 15 ∞ 0.50

[0319] 16 ∞ 0.50 1.51633 64.14

[0320] 17 ∞ 0.50

[0321] Image plane (image pickup plane)

[0322] Aspheric coefficient

[0323] first surface

[0324] K=0.000, A4=8.63164e-04, A6=-1.44594e-05, A8=-1.79441e-07,

[0325] A10=6.44702e-09

[0326] second surface

[0327] K=0.604, A4=3.55946e-04, A6=8.82553e-06, A8=-1.63344e-06,

[0328] A10=-4.03670e-08

[0329] sixth surface

[0330] K=-2.032, A4=9.5...

Embodiment 2

[0356] unit mm

[0357] surface data

[0358] surface number r d nd vd

[0359] 1 * -31.515 0.80 1.80610 40.92

[0360] 2 * 7.000 2.03

[0361] 3 9.346 1.28 1.92286 18.90

[0362] 4 16.817 variable

[0363] 5(S) ∞ 0.50

[0364] 6 * 4.597 1.74 1.58313 59.38

[0365] 7 * -10.331 0.10

[0366] 8 7.257 1.06 1.80400 46.57

[0367] 9 13.104 0.50 1.80518 25.42

[0368] 10 3.117 variable

[0369] 11 -10.000 0.80 1.52542 55.78

[0370] 12 -15.879 0.10

[0371] 13 -61.608 1.61 1.52542 55.78

[0372] 14 * -7.052 variable

[0373] 15 ∞ 0.50 1.54771 62.84

[0374] 16 ∞ 0.50

[0375] 17 ∞ 0.50 1.51633 64.14

[0376] 18 ∞ 0.50

[0377] Image plane (image pickup plane)

[0378] Aspheric coefficient

[0379] first surface

[0380] K=0.000, A4=1.28825e-03, A6=-2.87635e-05, A8=1.43822e-08, A10=5.28531e-09

[0381] second surface

[0382] K=0.968, A4=7.51526e-04, A6=1.29461e-05, A8=-2.77211e-06, A10=-7.88860e-11

[...

Embodiment 3

[0409] unit mm

[0410] surface data

[0411] surface number r d nd vd

[0412] 1 * -28.624 0.80 1.80610 40.92

[0413] 2 * 7.102 1.51

[0414] 3 8.465 1.25 1.92286 18.90

[0415] 4 15.000 variable

[0416] 5(S) ∞ 0.50

[0417] 6 * 4.584 1.68 1.58313 59.38

[0418] 7 * -15.102 0.10

[0419] 8 6.386 1.20 1.80610 40.92

[0420] 9 22.010 0.50 1.80518 25.42

[0421] 10 3.040 variable

[0422] 11 * -13.000 0.80 1.52542 55.78

[0423] 12 -12.693 0.10

[0424] 13 -23.585 2.02 1.52542 55.78

[0425] 14 * -6.191 variable

[0426] 15 ∞ 0.50 1.54771 62.84

[0427] 16 ∞ 0.50

[0428] 17 ∞ 0.50 1.51633 64.14

[0429] 18 ∞ 0.32

[0430] Image plane (image pickup plane)

[0431] Aspheric coefficient

[0432] first surface

[0433] K=0.000, A4=9.65210e-04, A6=-1.84232e-05, A8=1.54796e-07

[0434] second surface

[0435] K=0.775, A4=6.83359e-04, A6=-1.28637e-05, A8=2.06468e-07, A10=-3.45662e-08

[0436] sixth ...

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Abstract

The invention relates to a three-unit zoom lens and an image pickup device with same. The zoom lens comprises, sequentially from an object side, a negative lens unit, a positive lens unit and a positive lens unit. During the zoom period from the object side, a second lens unit moves to reduce the distance between a first lens unit and a second lens unit and increase the distance between the secondlens unit and a third lens unit. The second lens unit comprises two lens components, namely, a positive front lens component and a negative lens component sequentially from the object side. The thirdlens unit comprises two lens components, namely, a front lens component and a positive rear lens component sequentially from the object side. An aperture diaphragm is arranged closer to an image sidethan the first lens unit and arranged closer to the object side than the rear lens component of the second lens unit; and the aperture diaphragm moves together with the second lens unit along the optical axis direction during the zoom period from the wide angle end to the telephoto end.

Description

technical field [0001] The present invention relates to a three-unit zoom lens including, in order from its object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a positive refractive power. Moreover, the present invention also relates to an image pickup device equipped with such a three-unit zoom lens. Background technique [0002] In recent years, digital cameras that pick up images of objects using image pickup components such as CCDs and CMOS sensors have replaced film cameras as the mainstream. Also, different kinds of digital cameras ranging from inexpensive compact cameras to high-end cameras for professional use have been developed. [0003] Users of such inexpensive digital video cameras usually want to enjoy easy and simple shooting in various shooting situations anytime and anywhere. For this reason, such users prefer small digital cameras, especially cameras that ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/16G02B13/18H04N5/225
Inventor 市川启介
Owner OLYMPUS CORP
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