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Zoom lens system, imaging device, and camera

A technology of zoom lens and lens system, which is applied in the field of shooting equipment, zoom lens system, imaging device and shooting equipment, and can solve the problems of not being able to maintain optical performance

Inactive Publication Date: 2007-06-06
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore the optical performance cannot be maintained

Method used

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  • Zoom lens system, imaging device, and camera
  • Zoom lens system, imaging device, and camera
  • Zoom lens system, imaging device, and camera

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 5

[0242] 1A to 1C are configuration diagrams of a zoom lens system according to Embodiment 1. FIG. 3A to 3C are configuration diagrams of a zoom lens system according to Embodiment 2. FIG. 5A to 5C are configuration diagrams of a zoom lens system according to Embodiment 3. FIG. 7A to 7C are configuration diagrams of a zoom lens system according to Embodiment 4. FIG. 9A to 9C are configuration diagrams of a zoom lens system according to Embodiment 5. FIG. Each figure shows the zoom lens system at infinity focus. Figures 1A, 3A, 5A, 7A and 9A show that at the wide-angle limit (minimum focal length condition: focal length f W ) under the lens structure. Figures 1B, 3B, 5B, 7B and 9B show that at intermediate positions (intermediate focal length condition: focal length f M =(f W *f T ))) lens structure. Figures 1C, 3C, 5C, 7C and 9C show that at the telephoto limit (longest focal length condition: focal length f T ) under the lens structure.

[0243] Each of the zoom lens...

Embodiment 6

[0391] FIG. 16 is a sectional structural view of a digital camera according to Embodiment 6. FIG. In FIG. 16, the digital camera is composed of: an imaging device including a zoom lens system 1 and a CCD solid-state image sensor 2; a liquid crystal display monitor 3; a main body 4, and the like. The zoom lens system 1 employed is the zoom lens system according to Embodiment 1. In FIG. 16, the zoom lens system includes: a first lens unit G1, a second lens unit G2, an aperture A, and a third lens unit G3. In the main body 4 , the zoom lens system 1 is provided on the front side of the main body, and the CCD solid-state image sensor 2 is provided on the rear side of the zoom lens system 1 . A liquid crystal display monitor 3 is provided on the rear side of the main body 4 . An optical image of a subject to be photographed obtained by the zoom lens system 1 is formed on an image surface S. As shown in FIG.

[0392] The solid-state image sensor 2 has a recording pixel count of 2...

example 1

[0407] The zoom lens system of Example 1 corresponds to Embodiment 1 shown in FIGS. 1A to 1C. Table 1 shows the lens data of the zoom lens system of Example 1. Table 2 shows the aspheric data. Table 3 shows the focal length, F-number, field of view, total optical length, and variable axial distance data when the shooting distance is infinite.

[0408] lens unit

[0409] axial distance

[0410] the surface

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Abstract

An object of the present invention is to provide: a zoom lens system having a short entire length during shooting and non-shooting and a high resolution; an imaging device using the zoom lens system; and a camera including the imaging device. The zoom lens system is used for forming an optical image of an object with a variable magnification, and, in order from the object side, comprises a first lens unit (G1) of negative optical power, a second lens unit (G2) of positive optical power and a third lens unit (G3) of positive optical power. The lens units move respectively along the optical axis so that a magnification is changed with changing a distance between the respective lens units. The second lens unit (G2) comprises at least three lens elements including an object side lens element of the second lens unit which is a positive lens element arranged on the most object side with the surface of strong curvature facing the object side, and an image side lens element of the second lens unit which is a positive lens element arranged on the most image side with the convex surface facing the object side.

Description

technical field [0001] The present invention relates to a zoom lens system, an imaging device and a photographing device, in particular to a zoom lens system with stable performance, high image quality and small size for digital cameras, digital video cameras and other equipment, an imaging device including the zoom lens system, and an imaging device including the zoom lens system A photographing device of an imaging device. Background technique [0002] In digital cameras employing solid-state image sensors such as CCD (Charge Coupled Device) and CMOS (Complementary Metal-Oxide Semiconductor), components such as an optical low-pass filter should be provided at the rearmost part of the lens element in conjunction with the solid-state image sensor Between, a lens system with a relatively long back focus is necessary. In addition, in the photographing optical system of a digital camera, satisfactory telecentricity is required in order to avoid shad...

Claims

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Application Information

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IPC IPC(8): G02B15/20
CPCG02B15/177G02B15/143507
Inventor 吉次庆记
Owner PANASONIC CORP
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