Image trapping lens, image trapper, and image trapping unit

A lens and image technology, applied in the field of image capture lens, can solve the problem of not being suitable for reducing the total length of the image capture lens

Inactive Publication Date: 2003-10-08
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this type of image capture lens described in TOKKAI No. 2001-75006 is not suitable for reducing the total length of the image capture lens (from the surface located most on the object side to the image side in the entire image capture lens). The distance of the focal point, assuming that the aperture stop is positioned closest to the object side in the image capture lens, the total length of the image capture lens is the distance from the aperture stop to the focal point on the image side), although this is a measure that can be properly corrected for each Aberrations, while ensuring a lens with a wider opening angle

Method used

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  • Image trapping lens, image trapper, and image trapping unit
  • Image trapping lens, image trapper, and image trapping unit
  • Image trapping lens, image trapper, and image trapping unit

Examples

Experimental program
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Embodiment Construction

[0085] Will be based on figure 1 An embodiment of the image capturing lens unit of the present invention is explained. figure 1 A cross-sectional view showing a part of the optical axis of lens 1, lens 2, and lens 3 of an image capturing lens unit having a light shielding mask 26; IR (infrared) filter (cut filter) 23, which prevents the incidence of infrared rays from the object side; image capturing lens, in which the diaphragm S, the first lens L1, the second lens L2, and the third lens L3 are arranged in this order from the object side; the lens barrel 21, The lens L1, the lens L2, and the lens L3 are accommodated therein; the lens frame 22 is fixed to the lens L1, the lens L2, and the lens L3 arranged in the lens barrel 21. This image capturing lens unit is a component for performing imaging of an object image on a solid-state image capturing device such as a CCD using an optical system including a diaphragm S and lenses L1, L2, and L3. By the way, let us assume that figure ...

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Abstract

An image capturing lens to capture an image of an object is provided with an aperture diaphragm having an aperture through which an image is captured; a first lens having a positive refracting power, wherein both surfaces of the first lens are shaped in a convex form; a second lens having a negative refracting power, wherein an object-side surface of the second lens is shaped a concave form; and a third lens which is a meniscus lens whose convex surface faces toward the object side; wherein the aperture diaphragm, the firs lens, the second lens and the third lens are aligned in this order from the object side. <IMAGE>

Description

Technical field [0001] The present invention relates to an image capturing lens suitable for the optical system of a solid-state image capturing device such as a CCD type image sensor or a CMOS type image sensor. Background technique [0002] In recent years, as the performance of image capturing devices using solid-state image capturing devices such as CCD (Charge Coupled Device) image sensors or CMOS (Complementary Metal Oxide Semiconductor) image sensors has improved and their size has decreased, respectively Cellular phones and personal computers equipped with image capturing devices are widely used. [0003] Due to the increase in density caused by the size reduction or enhancement of functions in these cellular phones and personal computers, the size of the image capturing lens carried on the image capturing device is increasingly required to be reduced in order to realize a small image capturing device. [0004] As an image capturing lens used in such a small image capturi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B9/14G02B13/00G02B13/18
CPCG02B9/14G02B13/0035G02B13/18G02B9/16
Inventor 山口进
Owner KONICA MINOLTA INC
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