Imaging lens

A camera lens, lens technology, applied in optical components, optics, instruments, etc., can solve problems such as disadvantage of miniaturization, and achieve the effect of ensuring internal space

Inactive Publication Date: 2009-03-18
TIANJIN OFILM OPTO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the shutter mechanism is arranged in front of the first lens and closest to the object side, it is disadvantageous in terms of miniaturization.

Method used

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Embodiment 1

[0069] In the imaging lens according to Example 1, both surfaces of the first lens G1 , the second lens G2 , and the second lens G3 are aspherical. exist Figure 8 In the basic lens data of (A), the numerical value of the radius of curvature near the optical axis is shown as the radius of curvature of these aspherical surfaces. exist Figure 8 Among the numerical values ​​shown as aspheric surface data in (B), the symbol "E" indicates that the data immediately following it is a "power exponent" with base 10, and indicates that it will be represented by the exponential function with base 10. The value is multiplied by the value preceding the "E". For example, if it is "1.0E-02", it means "1.0×10 -2 ".

[0070]As the aspheric surface data, the values ​​of the respective coefficients An and K in the formula of the aspheric surface shape represented by the following formula (A) are shown. More specifically, Z represents the length (mm) of a perpendicular drawn from a point on...

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PUM

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Abstract

To provide a compact, high-performance imaging lens capable of sufficiently securing the inside spacing for arranging a shutter mechanism while maintaining high aberration performance coping with high-pixels. The imaging lens comprises, in order from an object side: a first lens G1 having positive refractive power; a second lens G2 having negative refractive power whose concave surface faces the object; and a third lens G3 having positive refractive power and having a positive meniscus form that has a convex surface, facing the object, in a portion at and around an optical axis of the imaging lens; wherein the imaging lens satisfies conditional expressions given below: (1) 0.7 G02B 13 / 00 G02B 9 / 14 G02B 13 / 18 18 10 1 2007 / 3 / 28 101046546 2007 / 10 / 3 100470292 2009 / 3 / 18 2009 / 3 / 18 2009 / 3 / 18 Fujinon Corp. Japan Sato Kenichi Taniyama Minoru ligui liang 11021 The Patent Agency of the Chinese Academy of Sciences Inside the Chinese Academy of Sciences, No.52 Sanlihe Road, Fuwai, Beijing 100864 Japan 2006 / 3 / 28 2006-087411 Japan 2006 / 7 / 25 2006-201709 Japan 2006 / 10 / 20 2006-285909

Description

technical field [0001] The present invention relates to a camera using imaging elements such as CCD (Charged Coupled Device) and CMOS (Complementary Metal Oxide Semiconductor) mounted on, for example, a digital still camera, a mobile phone with a camera, and a portable information terminal (PDA: Personal Digital Assistant). camera lens in the device. Background technique [0002] Imaging elements such as CCDs and CMOSs ​​are progressing towards very small size and high pixel count in recent years. For this reason, the camera body and the lens mounted thereon are also required to be compact and high performance. In order to achieve miniaturization, it is necessary to shorten the overall length and reduce the diameter (miniaturization in the radial direction perpendicular to the optical axis). In addition, generally, in an imaging optical system, in addition to miniaturization, telecentricity is also required, that is, the incident angle of the principal ray facing the imagi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B9/14G02B13/18
Inventor 佐藤贤一谷山实
Owner TIANJIN OFILM OPTO ELECTRONICS CO LTD
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