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    OPTICAL GLASS FOR PRECISION PRESS MOLDING
    81.
    发明专利
    OPTICAL GLASS FOR PRECISION PRESS MOLDING 失效

    公开(公告)号：JPH10316448A

    公开(公告)日：1998-12-02

    申请号：JP12860797

    申请日：1997-05-19

    Applicant: SUMITA OPTICAL GLASS

    Inventor： NAKAHATA KOJI ,  NAGAHAMA SHINOBU

    IPC: C03C3/16 ,  C03C3/19 ,  C03C3/21

    Abstract: PROBLEM TO BE SOLVED: To obtain an optical glass for precision press molding, high in refractive index and dispersion properties, slight in coloration of glass, having, a lightweight, capable of being subjected to precision press molding, containing no lead oxide capable of readily providing an optical glass with characteristics of a high refractive index and high dispersion properties and no TiO2 at all. SOLUTION: This optical glass comprises a composition consisting of 17 31 wt.% of P2 O5 0-7 wt.% of B2 O3 , 19-31 wt.% of the total of P2 O5 and B2 O3 , 0-15 wt.% of BaO, 0-6 wt.% of Li2 O, 6-16 wt.% of Na2 O, 9-17 wt.% of the total of Li2 O and Na2 O, 19-50 wt.% of Nb2 O5 , 0-25 wt.% of WO3 and 10-25 wt.% of TeO2 and has =1.73 refractive index,

    IMAGE SCOPE USING FLUORESCENT IMAGE GUIDE
    82.
    发明专利
    IMAGE SCOPE USING FLUORESCENT IMAGE GUIDE 失效

    公开(公告)号：JPH10293218A

    公开(公告)日：1998-11-04

    申请号：JP10337097

    申请日：1997-04-21

    Applicant: SUMITA OPTICAL GLASS

    Inventor： TAGAWA MASAFUMI ,  YAMAZAKI MASAAKI ,  OTSUKA MASAAKI ,  TAKAKU HIDEAKI ,  SAWANOBORI SHIGETO ,  NAGAHAMA SHINOBU

    IPC: G02B6/06

    Abstract: PROBLEM TO BE SOLVED: To make a fluorescent image guide presenting the fluorescence of a visible light beam with ultraviolet rays to be practicable by using a fluorescent fiber having the structure of an optical fiber in which material absorbing the ultraviolet rays and emitting the fluorescence of the visible light beam is used as a core. SOLUTION: The fluorescent image guide 1 is in a state where both end faces are relatively twisted by 180 deg., so that an image is inverted upside down. An objective lens 2 is arranged on the incident end side of the image guide 1 and the reflected image of an observed object 6 irradiated with the ultraviolet rays or light including the ultraviolet rays by a light guide 7 is formed through an attachable/detachable filter 4 with ultraviolet ray transmissive and visible light cut. The image converted into the visible light by the image guide 1 is transmitted to the terminal of the image guide 1 and observed with the naked eye 5 by an ocular 3 arranged behind the image guide 1. Thus, the image of only the ultraviolet area of the reflected image of the object to be observed irradiated with the ultraviolet rays is converted into the visible light so as to be observed.

    EMITTER
    85.
    发明专利
    EMITTER 失效

    公开(公告)号：JPH06187801A

    公开(公告)日：1994-07-08

    申请号：JP33711792

    申请日：1992-12-17

    Applicant: SUMITA OPTICAL GLASS

    Inventor： HIRATA KAZUMI ,  OKAWA EIJI ,  SAWANOBORI SHIGETO ,  NAGAHAMA SHINOBU

    IPC: C03C3/15 ,  C03C4/12 ,  C03C17/06 ,  F21K2/00

    Abstract: PURPOSE:To cause an emitter to emit light when a glass layer containing a rare earth ion is separated from a base which is made of metal, preferably rare metal, by affixing the glass layer to one or both sides of the base. CONSTITUTION:A base is heated to high temperatures according to the kind of glass used and is preferably made of a rare metal which is hard to oxidize during the heating treatment and has a coefficient of expansion comparatively close to that of glass, such as platinum or gold. The use of stable borate glass with good emission efficiency is desirable. As an example of the method of affixing the base to the glass, fusion of the glass onto the base is mentioned. The color and tone of emission can be varied as necessary by varying the kind and content of a rare earth ion serving as the center of emission, such as Tb , Eu , Sm , Tm , Er , Dy and Pr . The emitter is characterized in that emission is allowed without the use of an exiting source such as ultraviolet radiation, electron beams or electric fields.

    INFRARED RAY TRANSMITTING FLUORIDE GLASS
    87.
    发明专利
    INFRARED RAY TRANSMITTING FLUORIDE GLASS 失效

    公开(公告)号：JPH05132334A

    公开(公告)日：1993-05-28

    申请号：JP8831191

    申请日：1991-04-19

    Applicant: SUMITA OPTICAL GLASS

    Inventor： OU UKO ,  SAWANOBORI SHIGETO ,  NAGAHAMA SHINOBU

    IPC: C03C3/32 ,  C03C4/10

    Abstract: PURPOSE:To provide the title stable glass capable of transmitting rays of light ranging from visible rays to infrared ones, excellent in mechanical, chemical durability, also hard to crystallize. CONSTITUTION:The objective glass having the above-mentioned advantages comprising (A) 5-55mol% of PbF2, (B) 18-40mol% of AlF3, (C) 0-20mol% of CaF3, (D) 5-35mol% of YF3, (E) 0-15mol% of YbF3, (F) 0-15mol% of ErF3, (G) 0-10mol% of LiF, (H) 0-15mol% of TlF, and (I) a total of 0-45mol% of at least one kind of RF2 (R is Mg, Ca, Sr, Ba, Cd, Zn).

    OPTICAL GLASS FOR PRECISE PRESS MOLDING
    89.
    发明专利
    OPTICAL GLASS FOR PRECISE PRESS MOLDING 失效

    公开(公告)号：JPH0337130A

    公开(公告)日：1991-02-18

    申请号：JP17277589

    申请日：1989-07-04

    Applicant: SUMITA OPTICAL GLASS

    Inventor： NAKAHATA KOJI ,  BABA NOBUYOSHI ,  NAGAHAMA SHINOBU

    IPC: C03C3/068 ,  C03C4/00

    Abstract: PURPOSE:To produce the subject optical glass capable of carrying out press molding at extremely low temperature by preparing the optical glass consisting of a specific ratio of SiO2, B2O3, Li2O, Na2O, BaO, CaO, ZnO, La2O3; Gd2O3, Al2O3 and ZrO2 and specified in At, nd and nud. CONSTITUTION:The optical glass for precise press lens consisting of 20-40wt.% SiO3 and 11-12wt.% B2O3 in which total amount of SiO2 and B2O3 is 43-55wt.%, 3-8wt.% Li2O and 0-6wt.% Na2O in which total amount of Li2O and Na2O is 7-11wt.%, 0-22wt.% BaO and 0-16wt.% CaO, 0-23wt.% ZnO and 2-21wt.% La2O3 and 0-15wt.% Gd2O3 in which total amount of La2O3 and Gd2O3 is 4-29wt.% and 0.5-5.0wt.% Al2O3 and 0.2-3.0wt.% ZrO2, having 550 deg.C refractive temperature, 1.59-1.65 refractive index, >=54 ape number, extremely low softening temperature and middle refractive index and low dispersion is prepared. Thereby optical glass practically usable for a long time is obtained.

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