Title:
ND FILTER AND PROCESS METHOD OF THE SAME
Document Type and Number:
Japanese Patent JP2010122621
Kind Code:
A
Abstract:
To prevent generation of ghost and flare due to reflection on a cut portion of a ND filter.
The ND filter 21 includes a transparent resin film 35 and an ND film formed thereon, wherein the ND filter 21 is cut in such a manner that in the outer peripheral cut portion of the filter, the cut direction of the cut face 21a exposed in an aperture of an imaging device is approximately orthogonal to the main stretching direction of the transparent resin film 35.
Inventors:
SUZUKI KAZUO
YANAGI MICHIO
YANAGI MICHIO
Application Number:
JP2008298382A
Publication Date:
June 03, 2010
Filing Date:
November 21, 2008
Export Citation:
Assignee:
CANON DENSHI KK
International Classes:
G02B5/00; C23C14/08; C23C14/20; C23C14/24; G02B7/00; G03B9/02
Domestic Patent References:
| JP2009145450A | 2009-07-02 | |||
| JP2005017986A | 2005-01-20 | |||
| JP2007065109A | 2007-03-15 | |||
| JP2002284946A | 2002-10-03 | |||
| JPH04105933A | 1992-04-07 |
Attorney, Agent or Firm:
Yasuhiko Hibiya
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