Title:
OPTICAL MEMBER, IMAGE PICKUP APPARATUS, AND METHOD FOR MANUFACTURING OPTICAL MEMBER
Document Type and Number:
WIPO Patent Application WO/2013/088632
Kind Code:
A1
Abstract:
To provide an optical member having a porous glass layer on a substrate and rarely causing ripples. The optical member has a porous glass layer on a substrate. The porous glass layer includes a first porous glass layer and a second porous glass layer in this order on the substrate. The first porous glass layer has a uniform porosity. The second porous glass layer has a higher uniform porosity than the first porous glass layer.
Inventors:
SUGIYAMA AKIRA (JP)
ZHANG ZUYI (JP)
KOTANI YOSHINORI (JP)
TAKEI AKIKO (JP)
TAKASHIMA KENJI (JP)
KOKETSU NAOYUKI (JP)
ZHANG ZUYI (JP)
KOTANI YOSHINORI (JP)
TAKEI AKIKO (JP)
TAKASHIMA KENJI (JP)
KOKETSU NAOYUKI (JP)
Application Number:
PCT/JP2012/007173
Publication Date:
June 20, 2013
Filing Date:
November 08, 2012
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
C03B32/00; C03C17/34; C03C15/00; C03C23/00; G02B1/02; G02B1/10; G02B1/11; G02B1/113
Foreign References:
| DE3820547A1 | 1988-12-29 | |||
| JP2002160941A | 2002-06-04 | |||
| US4273826A | 1981-06-16 | |||
| JPS6483583A | 1989-03-29 |
Other References:
MUKHERJEE ET AL: "Gel-derived single-layer antireflection films with a refractive index gradient", THIN SOLID FILMS, ELSEVIER-SEQUOIA S.A. LAUSANNE, CH, vol. 81, no. 1, 10 July 1981 (1981-07-10), pages L89 - L90, XP025730044, ISSN: 0040-6090, [retrieved on 19810710], DOI: 10.1016/0040-6090(81)90510-1
MINOT ET AL: "Single-layer, gradient refractive index antireflection films effective from 0.35 to 2.5 [mu]", JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, AMERICAN INSTITUTE OF PHYSICS, NEW YORK; US, vol. 66, no. 6, 1 January 1976 (1976-01-01), pages 515 - 519, XP008146661, ISSN: 0093-5433, DOI: 10.1364/JOSA.66.000515
J. OPT. SOC. AM., vol. 66, no. 6, 1976
MINOT ET AL: "Single-layer, gradient refractive index antireflection films effective from 0.35 to 2.5 [mu]", JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, AMERICAN INSTITUTE OF PHYSICS, NEW YORK; US, vol. 66, no. 6, 1 January 1976 (1976-01-01), pages 515 - 519, XP008146661, ISSN: 0093-5433, DOI: 10.1364/JOSA.66.000515
J. OPT. SOC. AM., vol. 66, no. 6, 1976
Attorney, Agent or Firm:
ABE, Takuma et al. (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, JP)
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Claims: