OPTICAL MEMBER, IMAGE PICKUP APPARATUS, AND METHOD FOR MANUFACTURING OPTICAL MEMBER

• Main Authors: MASUBUCHI TOMOAKI, KOTANI YOSHINORI, SUGIYAMA AKIRA, ZHANG ZUYI, TAKEI AKIKO, KAKEGAWA NORISHIGE, KOKETSU NAOYUKI, TAKASHIMA KENJI
• Format: Patent
• Language: English
• Published: 21.05.2015
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MINERAL OR SLAG WOOL; NANOTECHNOLOGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING

To provide an optical member in which crystallization is suppressed and which has a porous glass layer on a base material. An optical member has a base material 1 and a porous glass layer 2 which is formed on the base material 1 and has a three-dimensional through pore, in which the existence ratio of crystals of 0.2 micrometer or more in the porous glass layer 2 is 1.0% or lower.