Taking lens system

A lens system and lens technology, applied in the fields of lenses, instruments, optics, etc., can solve the relationship between the inappropriate shape of the first lens element, difficulty in manufacturing peripheral performance, and the focal power of the first and second lens elements Inappropriate and other problems, to achieve the effect of low cost, small cost, and reduced sensitivity

Active Publication Date: 2006-09-06
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Disadvantageously, however, the three-lens element imaging lens systems proposed in the above-mentioned Patent Publications 1 to 4 have disadvantages in that the shape of the first lens element is not suitable and the difference between the powers of the first and second lens elements The relationship between
As a result, these structures are extremely sensitive to manufacturing errors related to the optical axis of the lens, making it difficult to manufacture satisfactory peripheral performance

Method used

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  • Taking lens system
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0100] [Asphere data of surface r2]

[0101] ε=-0.77750×10, A4=0.30133, A6=-0.18716

[0102] [Asphere data of surface r3]

[0103] ε=-0.32536×10, A4=0.12859, A6=0.96276×10 -1

[0104] [Asphere data for surface r4]

[0105] ε=-0.17634×10 2 , A4=0.16810, A6=0.37183×10 -1 , A8=0.13745, A10=-0.27842×10 -1

[0106] [Asphere data of surface r5]

[0107] ε=0.29577, A4=0.49555×10 -1 , A6=-0.17811×10 -1 , A8=-0.14756×10 -1 , A10=0.29727×10 -1

[0108] [Asphere data of surface r6]

[0109] ε=0.17544×10, A4=-0.24387, A6=0.11001, A8=-0.45300×10 -1 , A10=0.24779×10 -1 , A12=-0.87870×10 -2

[0110] [Asphere data for surface r7]

[0111] ε=-0.40000×10, A4=-0.15919, A6=0.91191×10 -1 , A8=-0.38452×10 -1 , A10=0.91696×10 -2 , A12=-0.97609×10 -3

[0112] Table 2

example 2

[0115] [Asphere data of surface r2]

[0116] ε=-0.52989×10, A4=0.28235, A6=-0.14635

[0117] [Asphere data of surface r3]

[0118] ε=-0.35960×10, A4=0.13545, A6=0.68161×10 -1

[0119] [Asphere data for surface r4]

[0120] ε=-0.68322×10, A4=-0.38560×10 -1 , A6=-0.22741×10 -1 , A8=0.94379×10 -2 , A10=0.36530×10 -1

[0121] [Asphere data of surface r5]

[0122] ε=0.45134, A4=-0.16882×10 -1 , A6=-0.44234×10 -2 , A8=0.17818×10 -1 , A10=0.55365×10 -2

[0123] [Asphere data of surface r6]

[0124] ε=0.20629×10, A4=-0.33010, A6=0.13147, A8=-0.49477×10 -1 , A10=0.31953×10 -1 , A12=-0.10098×10 -1

[0125] [Asphere data for surface r7]

[0126] ε=-0.40000×10, A4=-0.15498, A6=0.82349×10 -1 , A8=-0.35200×10 -1 , A10=0.88419×10 -2 , A12=-0.95148×10 -3

[0127]

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Abstract

A taking lens system for forming an image on a solid-state image sensor has, from the object side thereof: an aperture stop, a first lens element having a positive optical power and convex to the object side, a second lens element having a positive optical power and convex to the image-surface side, and a third lens element having a negative optical power and concave to the image-surface side. Alternatively, a taking lens system for forming an image on a solid-state image sensor has an aperture stop, a first lens element having a positive optical power, having a meniscus shape, and convex to the object side, a second lens element having a positive optical power, and a third lens element having a negative optical power. In addition, in either case, the taking lens system fulfills prescribed conditional formulae.

Description

technical field [0001] The present invention relates to imaging lens systems, and more particularly to high-performance and compact imaging lens systems suitable for digital input devices (such as digital cameras or digital video cameras) that use solid-state imaging sensors to capture images of objects. Background technique [0002] In recent years, with the popularization of personal computers and the like, digital still cameras and digital video cameras (hereinafter collectively referred to as digital cameras) that allow image data to be easily entered into digital devices have become increasingly popular among general users. It is expected that such digital cameras will become more popular as image data input devices in the future. [0003] Solid-state image sensors such as CCDs (Charge Coupled Devices) used in digital cameras have been made smaller and smaller, so further miniaturization is sought in the digital cameras themselves. As a result, miniaturization is also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B9/12
CPCG02B9/12G02B13/0035G02B15/163G02B3/0087G02B2003/0093
Inventor 矶野雅史
Owner KONICA MINOLTA INC
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