Title:
OPTICAL LOW-PASS FILTER AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/030863
Kind Code:
A1
Abstract:
An optical low-pass filter includes a light transmitting member (41) and refraction factor distribution formation means (42) for forming a refraction factor distribution periodically changing within a plane of the light transmission member (41). The refraction factor distribution formation means is formed, for example, by a piezoelectric body. By applying a high-frequency voltage to the piezoelectric body to generate a compressional wave in the light transmitting member (41), the refraction factor distribution is formed.
Inventors:
SHIOZAWA MASAKI (JP)
NOMURA TATSUSHI (JP)
NOMURA TATSUSHI (JP)
Application Number:
PCT/JP2005/017050
Publication Date:
March 23, 2006
Filing Date:
September 15, 2005
Export Citation:
Assignee:
NIKON CORP (JP)
SHIOZAWA MASAKI (JP)
NOMURA TATSUSHI (JP)
SHIOZAWA MASAKI (JP)
NOMURA TATSUSHI (JP)
International Classes:
G02B27/46; G03B11/00; H04N5/238; H04N5/335
Foreign References:
| JPS6440812A | 1989-02-13 | |||
| JPH0338978A | 1991-02-20 | |||
| JPS60101519A | 1985-06-05 | |||
| JPH01261012A | 1989-10-18 | |||
| JPH03141681A | 1991-06-17 | |||
| JP2003167123A | 2003-06-13 |
Attorney, Agent or Firm:
Nagai, Fuyuki (2-1-1 Uchisaiwai-ch, Chiyoda-ku Tokyo 11, JP)
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