Title:
OPTICAL ELEMENT, COMPOSITE OPTICAL ELEMENT, INTERCHANGEABLE LENS, AND IMAGE-CAPTURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/125180
Kind Code:
A1
Abstract:
The present invention provides a novel optical element that uses a composite material and has a desired refractive index distribution. This optical element comprises a resin and a group of inorganic particles dispersed in said resin, wherein: said group of inorganic particles includes a group of first particles, and a group of second particles having a greater specific gravity than said group of first particles; the refractive index of said group of first particles is different from the refractive index of said group of second particles; in a region on the side of the optical axis of the optical element, there are more of said first particles than said second particles; and in a region on the outer peripheral side of the optical element, there are more of said second particles than said first particles.
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Inventors:
SASAKI JUMPEI
Application Number:
PCT/JP2013/000774
Publication Date:
August 29, 2013
Filing Date:
February 13, 2013
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
G02B3/00; B29C39/02; B29C39/10; B29C39/42; G02B1/04; B29L11/00
Foreign References:
| JPS6236028A | 1987-02-17 | |||
| JP2009083326A | 2009-04-23 | |||
| JPH03131810A | 1991-06-05 | |||
| JPS6451336A | 1989-02-27 | |||
| JP2005234535A | 2005-09-02 | |||
| US6136234A | 2000-10-24 | |||
| US5498383A | 1996-03-12 |
Attorney, Agent or Firm:
KAMADA, Koichi et al. (JP)
Koichi Kamata (JP)
Koichi Kamata (JP)
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Claims:
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