Image-capturing optical system, image-capturing optical device, and digital equipment

A photographic optical system and optical image technology, applied in the field of photographic optical systems, can solve problems such as high-pixel imaging components and insufficient thinning of optical structures, etc.

Active Publication Date: 2012-02-01
KONICA MINOLTA OPTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, in the structure disclosed in Patent Document 2, since the size of the reflective prism provided on the image side is large, the reduction in thickness of the entire optical structure is insufficient.
In addition, Patent Document 2 does not describe that in order to ensure the performance of the imaging optical system, it is necessary to correct astigmatism, chromatic aberration, etc.
Therefore, the optical structure disclosed in Patent Document 2 is difficult to cope with the increase in pixel count of the imaging element.

Method used

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  • Image-capturing optical system, image-capturing optical device, and digital equipment
  • Image-capturing optical system, image-capturing optical device, and digital equipment
  • Image-capturing optical system, image-capturing optical device, and digital equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0160] Unit: mm

[0161] surface data

[0162] face number r d nd vd

[0163] object plane ∞d0

[0164] 1*-5.117 0.000 1.525 56.45

[0165] 2∞3.433 1.525 56.45

[0166] 3∞0.298 1.525 56.45

[0167] 4*-9.386 0.112

[0168] 5 (stop) ∞0.500

[0169] 63.500 1.330 1.531 49.33

[0170] 7-5.000 0.787

[0171] 8*-4.857 0.600 1.607 27.10

[0172] 9*4.054 d9

[0173] 10*9.611 1.975 1.532 56.57

[0174] 11*-3.418 0.050

[0175] 12∞0.300 1.517 64.17

[0176] 13∞d13

[0177] 14*-18.247 0.100 1.607 27.10

[0178] 15∞3.418 1.607 27.10

[0179] 16*6.016 0.400

[0180] 17∞0.100 1.517 64.17

[0181] 18∞0.100

[0182] Image plane ∞

[0183] Aspheric Data

[0184] side 1

[0185] K=0.0

[0186] A4=3.4946E-03

[0187] A6=-9.8255E-05

[0188] A8=3.3987E-06

[0189] A10=9.6167E-08

[0190] side 4

[0191] K=0.0

[0192] A4=4.4700E-03

[0193] A6=1.7029E-04

[0194] A8=-3.1054E-05

[0195] A10=3.5086E-05

[0196] side 8

[0197] K=0.0

[0198] A4=-1.3095E-02

[0199...

Embodiment 2

[0244] Unit: mm

[0245] surface data

[0246] face number r d nd vd

[0247] object plane ∞d0

[0248] 1*-7.934 0.000 1.768 49.23

[0249] 2∞3.620 1.768 49.23

[0250] 3∞0.355 1.768 49.23

[0251] 4*-10.540 0.805

[0252] 5 (stop) ∞d5

[0253] 64.349 1.012 1.815 43.33

[0254] 7-20.408 0.750

[0255] 8-8.931 0.600 1.804 24.32

[0256] 95.412 0.700

[0257] 10*6.647 1.584 1.525 56.45

[0258] 11*-4.709 d11

[0259] 12*-14.256 0.100 1.607 27.60

[0260] 13∞3.384 1.607 27.60

[0261] 14*6.813 0.400

[0262] 15∞0.100 1.517 64.17

[0263] 16∞0.100

[0264] Image plane ∞

[0265] Aspheric Data

[0266] side 1

[0267] K=0.0

[0268] A4=9.0280E-04

[0269] A6=2.3895E-05

[0270] A8=-4.7532E-06

[0271] A10=3.3500E-07

[0272] side 4

[0273] K=0.0

[0274] A4=1.3480E-03

[0275] A6=-1.0479E-04

[0276] A8=2.9829E-05

[0277] A10=-1.9600E-06

[0278] side 10

[0279] K=0.0

[0280] A4=1.3224E-04

[0281] A6=3.6821E-04

[0282] A8=1.2316E-05

[0283]...

Embodiment 3

[0314] Unit: mm

[0315] surface data

[0316] face number r d nd vd

[0317] object plane ∞d0

[0318] 1*-5.934 0.000 1.525 56.45

[0319] 2∞3.389 1.849 33.11

[0320] 3∞0.255 1.525 56.45

[0321] 4*-13.149 0.313

[0322] 5 (stop) ∞0.500

[0323] 63.885 1.060 1.701 47.99

[0324] 7-11.520 0.741

[0325] 8*-11.141 0.600 1.607 27.10

[0326] 9*3.524 d9

[0327] 10*7.519 1.884 1.525 56.45

[0328] 11*-3.727 0.050

[0329] 12∞0.300 1.517 64.17

[0330] 13∞d13

[0331] 14*-11.880 0.100 1.583 29.90

[0332] 15∞3.398 1.850 40.00

[0333] 16∞0.100 1.583 29.90

[0334] 17*6.263 0.400

[0335] 18∞0.100 1.517 64.17

[0336] 19∞0.100

[0337] Image plane ∞

[0338] Aspheric Data

[0339] side 1

[0340] K=0.0

[0341] A4=3.4627E-03

[0342]A6=-1.0819E-04

[0343] A8=5.6463E-07

[0344] A10=1.6782E-07

[0345] side 4

[0346] K=0.0

[0347] A4=4.0674E-03

[0348] A6=-7.0872E-04

[0349] A8=3.4454E-04

[0350] A10=-6.1112E-05

[0351] side 8

[0352] K=0.0...

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Abstract

An image-capturing optical system (OP) has first and second prisms (P1, P2) for bending input light at approximately right angles. The optical axis (AX) at the light input surface of the first prism (P1) and the optical axis (AX) at the light output surface of the second prism (P2) are substantially parallel to each other. A lens element for forming at least one power group is provided on a light path sandwiched between the first and second prisms (P1, P2), and a power group located closest to the light input surface of the second prism (P2) is a positive power group. The light input surface of the second prism (P2) has a concave shape on the object side and satisfies the conditional expressions -4.2 < fp2/f < -0.2 (fp2: the focal length of the second prism, f: the focal length of the entire image-capturing optical system) and 0.2 < |f_lp/fp2| < 1.5 (f_lp: the focal distance of the power group located closest to the light input surface of the second prism).

Description

technical field [0001] The present invention relates to an imaging optical system, an imaging optical device and digital equipment. More specifically, it relates to an imaging optical device that captures an image of a subject by using an imaging element, a digital device with an image input function equipped with the imaging optical device, and an optical image of the subject formed on the light receiving surface of the imaging element. camera optical system. Background technique [0002] In recent years, the popularization of digital devices with an image input function such as digital still cameras, digital video recorders, portable phones with cameras, and PDAs with cameras (Personal Digital Assistant) has been surprising. Pixelation and high functionality are rapidly developing. Therefore, in order to make full use of the performance of an imaging element having increased pixels, etc., high optical performance is also required for an imaging optical system that introd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/0035G02B13/004G02B13/007G02B13/006G02B13/0075
Inventor 山田惠子
Owner KONICA MINOLTA OPTO
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