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Title:
IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/041469
Kind Code:
A1
Abstract:
An imaging device having an optical system for collecting light from an object, a semiconductor imaging element (4) for receiving the light collected by the optical system and creating an imaging signal, and a transparent member (5) provided between the optical system and the semiconductor imaging element (4) and having a refraction index continuously varying according to an applied electric field. When an electric field is applied to the transparent member (5), its refraction index varies continuously to continuously change the length of the light path. This realizes auto-focusing without movement of a lens, which is effective to downsize the imaging device and reduces degradation in image quality.

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Inventors:
NISHIZAWA HIROSHI
Application Number:
PCT/JP2007/067921
Publication Date:
April 10, 2008
Filing Date:
September 14, 2007
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
NISHIZAWA HIROSHI
International Classes:
G02B7/28; G02B3/14; G03B11/00; G03B13/36; H04N5/232
Domestic Patent References:
WO2005101083A12005-10-27
Foreign References:
JP2000197604A2000-07-18
JPH0410777A1992-01-14
JPH0436737A1992-02-06
JP2005326621A2005-11-24
JP2006243573A2006-09-14
JP2006243572A2006-09-14
JP2006209122A2006-08-10
JPH07333539A1995-12-22
JPS5922010A1984-02-04
JPS6291914A1987-04-27
Attorney, Agent or Firm:
OHNO, Seiji et al. (Kasumigaseki Building36F, 2-5, Kasumigaseki 3-chom, Chiyoda-ku Tokyo 36, JP)
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