EXPOSURE CONTROL MECHANISM FOR IMAGE PICKUP DEVICE

Title:

EXPOSURE CONTROL MECHANISM FOR IMAGE PICKUP DEVICE

Document Type and Number:

Japanese Patent JP2001272709

Kind Code:

A

Abstract:

To prevent the deterioration of image quality in a middle state leading to the small aperture state from the open state of a diaphragm aperture, and to reduce the occurrence (deterioration) of what is called shading.

In this exposure control mechanism for the image pickup device where the diaphragm aperture is formed by moving diaphragm blades in a direction where they contact with/separate from each other on a plane orthogonal to an optical axis, and an ND filter is not attached to at least one diaphragm blade but an ND filter having at least two-stage transmittance is attached to other diaphragm blade; the moving speed of the diaphragm blade to which the ND filter is attached is made higher than the diaphragm blade to which the ND filter is not attached.

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IMAGING APPARATUS, CONTROL METHOD, AND PROGRAM

Inventors:

KOBAYASHI CHIEKO
KIKUCHI SHUICHI
IKEGAMI KEISUKE
EDAMITSU TOSHIAKI

Application Number:

JP2000086062A

Publication Date:

October 05, 2001

Filing Date:

March 27, 2000

Export Citation:

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Assignee:

SONY CORP

International Classes:

G03B7/18; G03B7/085; G03B9/02; G03B9/24; G03B11/00; H04N5/225; (IPC1-7): G03B7/18; G03B7/085; G03B9/02; G03B9/24; G03B11/00; H04N5/225

Domestic Patent References:

JPH0843878A	1996-02-16
JPH09197475A	1997-07-31
JPH11190866A	1999-07-13
JPH1115042A	1999-01-22
JPH05281592A	1993-10-29

Attorney, Agent or Firm:

Yuji Komatsu

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