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Three-unit zoom lens system and image pickup apparatus using the same

A zoom lens, three-unit technology, which is applied in the parts, image communication, electrical components and other directions of the TV system, can solve the problem of increasing the total length of the zoom lens and so on.

Inactive Publication Date: 2012-01-04
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the total length of the zoom lens becomes larger

Method used

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  • Three-unit zoom lens system and image pickup apparatus using the same
  • Three-unit zoom lens system and image pickup apparatus using the same
  • Three-unit zoom lens system and image pickup apparatus using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0257] unit mm

[0258] surface data

[0259] surface number r d nd vd

[0260] 1 * -113.961 0.70 1.88300 40.76

[0261] 2 * 5.940 1.65

[0262] 3 10.858 1.73 1.84666 23.78

[0263] 4 50.171 variable

[0264] 5(S) ∞ 0.00

[0265] 6 * 4.509 2.40 1.51633 64.14

[0266] 7 10.100 0.54 1.90366 31.32

[0267] 8 3.983 2.15 1.62263 58.16

[0268] 9 * -24.449 variable

[0269] 10 * -3.808 1.00 1.49700 81.54

[0270] 11 -5.865 variable

[0271] 12 ∞ 0.50 1.53996 59.45

[0272] 13 ∞ 0.50

[0273] 14 ∞ 0.49 1.51633 64.14

[0274] 15 ∞ 0.58

[0275] Image plane (light receiving surface)

[0276] Aspheric coefficient

[0277] first surface

[0278] K=0.000, A4=-5.53177e-04, A6=3.25017e-05, A8=-8.64611e-07, A10=8.14308e-09

[0279] second surface

[0280] K=0.000, A4=-1.03578e-03, A6=2.37354e-05, A8=-4.40077e-07, A10=-2.03801e-08

[0281] sixth surface

[0282] K=-0.246, A4=-1.98445e-04, A6=-1.40006e-05, A8=1.28259e-06

[0283] ...

Embodiment 2

[0301] unit mm

[0302] surface data

[0303] surface number r d nd vd

[0304] 1 -23.597 0.70 1.88300 40.76

[0305] 2 * 6.226 1.43

[0306] 3 12.104 1.52 1.84666 23.78

[0307] 4 -450.803 variable

[0308] 5(S) ∞ 0.00

[0309] 6 * 5.814 2.40 1.61772 49.81

[0310] 7 -10.102 0.50 2.00069 25.46

[0311] 8 28.851 0.25

[0312] 9 8.468 2.15 1.51742 52.43

[0313] 10 * -12.126 variable

[0314] 11 -3.573 1.00 1.61800 63.33

[0315] 12 -6.653 variable

[0316] 13 ∞ 0.84 1.53996 59.45

[0317] 14 ∞ 0.26

[0318] 15 ∞ 0.49 1.51633 64.14

[0319] 16 ∞ 0.58

[0320] Image plane (light receiving surface)

[0321] Aspheric coefficient

[0322] second surface

[0323] K=0.000, A4=-6.75522e-04, A6=1.79460e-05, A8=-1.93173e-06, A10=4.14591e-08

[0324] sixth surface

[0325] K=-0.452, A4=-2.82467e-05, A6=1.96831e-05, A8=2.08520e-07

[0326] tenth surface

[0327] K=0.000, A4=1.06303e-03, A6=3.27588e-05, A8=-2.57123e-06, A10=2.03117e-07

...

Embodiment 3

[0342] unit mm

[0343] surface data

[0344] surface number r d nd vd

[0345] 1 * -62.729 0.70 1.88300 40.76

[0346] 2 * 5.852 1.51

[0347] 3 11.451 1.66 2.00069 25.46

[0348] 4 56.559 variable

[0349] 5(S) ∞ 0.00

[0350] 6 * 4.483 2.40 1.51633 64.14

[0351] 7 11.667 0.62 1.90366 31.32

[0352] 8 4.172 2.15 1.62263 58.16

[0353] 9 * -23.523 variable

[0354] 10 * -4.173 1.00 1.49700 81.54

[0355] 11 -6.653 variable

[0356] 12 ∞ 0.50 1.53996 59.45

[0357] 13 ∞ 0.50

[0358] 14 ∞ 0.49 1.51633 64.14

[0359] 15 ∞ 0.58

[0360] Image plane (light receiving surface)

[0361] Aspheric coefficient

[0362] first surface

[0363] K=0.000, A4=-5.96485e-04, A6=3.58482e-05, A8=-9.13819e-07, A10=7.87055e-09

[0364] second surface

[0365] K=0.000, A4=-1.17758e-03, A6=2.71790e-05, A8=-4.34015e-07, A10=-2.58636e-08

[0366] sixth surface

[0367] K=-0.271, A4=-1.55770e-04, A6=-1....

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Abstract

The present invention relates to a three-unit zoom lens system and an image pick-up device using the same. A three-unit zoom lens system includes in order from an object side thereof a first lens unit G1 having a negative refracting power, a second lens unit G2 having a positive refracting power, a third lens unit G3 having a negative refracting power, and an aperture stop which is at an image side of the first lens unit G1, and at the object side of a lens surface nearest to the image side of the second lens unit G2, and which moves integrally with the second lens unit. At a time of zooming from a wide angle end to a telephoto end, a distance between the first lens unit G1 and the second lens unit G2 is narrowed, and a distance between the second lens unit G2 and the third lens unit G3 changes. The second lens unit G2 moves toward the object side at the time of zooming from the wide angle end to the telephoto end. The third lens unit G3 moves to be positioned at the object side at the telephoto end, with respect to the wide angle end. The three-unit zoom lens system satisfies predetermined conditional expressions.

Description

technical field [0001] The present invention relates to a compact three-unit zoom lens system, and an image pickup device such as a compact digital video camera using the three-unit zoom lens system. Background technique [0002] In image pickup devices such as digital cameras and video recorders, high image quality, high magnification, and thin lens frames are sought. For example, one including a first lens unit with negative refractive power, a second lens unit with positive refractive power, and a third lens unit with negative refractive power as described in Japanese Patent Application Laid-Open Publication No. 2004-333572 has hitherto been known. Zoom lens system. This zoom lens system has comparatively favorable optical performance while ensuring a high magnification of about 4 times. [0003] In the zoom lens system in the above publication, since the axial thickness of the third lens unit is thick, it is not easy to be thinned when the zoom lens system is in the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/177G02B9/12H04N5/225
Inventor 片仓正弘
Owner OLYMPUS CORP
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