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Zooming lens

A zoom lens and lens technology, applied in the field of zoom lenses, can solve problems such as difficulty in high pixelization

Inactive Publication Date: 2007-11-28
FUJI PHOTO OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the conventionally developed low-cost and compact zoom lens consisting of about 3 elements is difficult to cope with high pixelation

Method used

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Examples

Experimental program
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Embodiment

[0061] Next, specific numerical examples of the zoom lens according to this embodiment will be described. Numerical examples (Examples 1 to 4) of the first to fourth examples will be briefly described below. 5(A) to (C) show specific lens data corresponding to the configuration of the zoom lens shown in FIG. 1 . In addition, Fig. 6 (A) ~ (C), Fig. 7 (A) ~ (C) and Fig. 8 (A) ~ (C) respectively represent the configuration corresponding to the zoom lens shown in Fig. 2, Fig. 3 and Fig. 4 specific lens data. Also, Fig. 5(A), Fig. 6(A), Fig. 7(A) and Fig. 8(A) represent the basic data part in the lens data of its embodiment, Fig. 5(B), Fig. 6(B) , FIG. 7(B) and FIG. 8(B) show the data part of the aspherical shape in the lens data of the embodiment. FIG. 5(C), FIG. 6(C), FIG. 7(C) and FIG. 8(C) show other data.

[0062] The surface number Si column of each lens data such as FIG. 5(A) shows that the surface of the most object-side constituent elements including the diaphragm St a...

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Abstract

This invention relates to a kind of Zooming lens. From objective side, it comprises in turn a negative first group (11) with a negative lens (G1) formed by a spherical lens or aspheric lens and a positive arc spherical lens (G2) with convex surface upward, a positive second group (12) with a plastic aspheric lens (G3) with near axis part as dual-convex shape and a dual-convex spherical lens (G4) and a dual-concave spherical lens (G5) joint with the fourth lens, and positive third group (13) with a spherical or aspheric positive lens (G6) with convex surface toward the objective side. To focus, it moves the first and second groups. Opposite to high pixel and small-size information terminal device, This invention implements low cost.

Description

technical field [0001] The present invention relates to a zoom lens suitable for mounting in a small information terminal device such as a mobile phone with a camera or a PDA (Personal Digital Assistant). Background technique [0002] In recent years, with the popularization of personal computers in general households, etc., digital still cameras (hereinafter, simply referred to as digital cameras) capable of inputting image information such as captured landscapes and portraits into personal computers have rapidly become popular. In addition, as mobile phones have become more sophisticated, camera-equipped mobile phones equipped with a compact camera module are rapidly spreading. In addition, it is also common to mount camera modules in small signal terminal devices such as PDAs. [0003] An imaging element such as a CCD (Charge Coupled Device: Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) is used in a device having these imaging functions. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/14G02B9/12G02B13/18G02B1/04
Inventor 筱原义和
Owner FUJI PHOTO OPTICAL CO LTD