ZOOM LENS AND IMAGING DEVICE USING ZOOM LENS

Title:

ZOOM LENS AND IMAGING DEVICE USING ZOOM LENS

Document Type and Number:

WIPO Patent Application WO/2005/091043

Kind Code:

A1

Abstract:

A zoom lens that is composed of lens groups and whose magnification is varied by varying the distance between the groups. The zoom lens includes at least, in a first group (GR1) fixed during zooming, a reflection member (M) for bending the optical axis by substantially 90º and a negative group more on the object side than the reflection member (M), and includes at least, on the image side of the first group (GR1), a second group (GR2) movable during zooming and having negative refractive power and a light amount regulation member (ST1) fixed during zooming. When a barrel is retracted, the angle of the reflection member (M) changes to create a space, and the negative group in the first group (GR1) is received in the space.

Inventors:

IWASAWA YOSHITO (JP)

Application Number:

PCT/JP2005/002279

Publication Date:

September 29, 2005

Filing Date:

February 15, 2005

Export Citation:

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Assignee:

SONY CORP (JP)
IWASAWA YOSHITO (JP)

International Classes:

G02B15/16; G02B15/167; G02B15/173; G02B15/177; G02B15/20; H04N5/225; G02B5/04; H04N101/00; (IPC1-7): G02B15/16; G02B15/20

Domestic Patent References:

WO2003085438A1

2003-10-16

Foreign References:

JP2003329932A	2003-11-19
JP2004077211A	2004-03-11
JPH08248318A	1996-09-27
JP2004037967A	2004-02-05
JP2003262907A	2003-09-19

Other References: