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    41.
    发明专利
    未知

    公开(公告)号：FR2295983A1

    公开(公告)日：1976-07-23

    申请号：FR7539491

    申请日：1975-12-23

    Applicant: AMERICAN OPTICAL CORP

    Inventor： UHLMANN DONALD R ,  SNITZER ELIAS ,  HOVEY RICHARD J

    IPC: B01J2/00 ,  C09B67/08 ,  C09K9/00 ,  C09K9/02 ,  G03C1/685 ,  C08J7/00 ,  C09K1/02 ,  G02B1/04

    Abstract: Organic photochromic materials comprising a photochromic dye and a resinous material can be stabilized with a protective coating which will protect them from deactivation by exposure to moisture, oxygen, various plastic host materials, reactive chemicals or even normal atmospheric conditions. Useful organic photochromic dyes include the spiropyrans, the spirooxazines, the metal dithizonates, the phenazines, the phenothiazines and other known photochromic compositions. Useful resinous materials include vinyl-type thermoplastics, cellulosic materials, polyesters, epoxy resins and aminoplast resins. The encapsulated photochromic materials of the invention comprise an organic photochromic dye in combination with an organic resinous material enclosed within an outer shell of an inorganic material and find use in the preparation of photochromic plastic films, sheets, ophthalmic lenses such as lenses for sunglasses and in camera lenses and filters.

    42.
    发明专利
    未知

    公开(公告)号：DE2553326A1

    公开(公告)日：1976-07-01

    申请号：DE2553326

    申请日：1975-11-25

    Applicant: AMERICAN OPTICAL CORP

    Inventor： UHLMANN DONALD R ,  SNITZER ELIAS ,  HOVEY RICHARD J ,  CHU NORI Y C

    IPC: B01J2/00 ,  C09B67/08 ,  C09K9/00 ,  C09K9/02 ,  G03C1/685 ,  G02B5/23 ,  G02C7/10 ,  G03C1/733

    Abstract: Organic photochromic materials comprising a photochromic dye and a resinous material can be stabilized with a protective coating which will protect them from deactivation by exposure to moisture, oxygen, various plastic host materials, reactive chemicals or even normal atmospheric conditions. Useful organic photochromic dyes include the spiropyrans, the spirooxazines, the metal dithizonates, the phenazines, the phenothiazines and other known photochromic compositions. Useful resinous materials include vinyl-type thermoplastics, cellulosic materials, polyesters, epoxy resins and aminoplast resins. The encapsulated photochromic materials of the invention comprise an organic photochromic dye in combination with an organic resinous material enclosed within an outer shell of an inorganic material and find use in the preparation of photochromic plastic films, sheets, ophthalmic lenses such as lenses for sunglasses and in camera lenses and filters.

    44.
    发明专利
    未知

    公开(公告)号：DE1596724A1

    公开(公告)日：1971-03-18

    申请号：DE1596724

    申请日：1966-09-27

    Applicant: AMERICAN OPTICAL CORP

    Inventor： CANFIELD ROBINSON CHARLES ,  SNITZER ELIAS

    IPC: C03C3/087 ,  C03C3/095 ,  C03C3/16 ,  C03C3/17 ,  C03C3/253 ,  C03C4/00 ,  C03C4/06 ,  G02F1/01 ,  G02F2/02 ,  C03C3/30

    Abstract: 1,154,224. Glass compositions. AMERICAN OPTICAL CO. 19 Aug., 1966 [28 Sept., 1965], No.37182/66. Heading C1M. [Also in Division C4] A light controlling device comprises a trivalent Er doped host body 14, means 8 for introducing a stream of light into said body and means 8 for pumping said Er to vary the transmission characteristics of the body. A glass host contains Er 2 O 3 and one or more oxides of Yb, Nd, Si, Na; Li, K; Ca, Ba; Zn, Al, Sb. The glass may have a silicate B 2 O 3 , P 2 O 5 or SeO 2 base. Other hosts are YAl garnate, Catungstate and Ca fluoride. Light from an A or Kr ion laser passes through the glass rod 14 pumped with I.R. radiation from a xenon flash tube 12 in a cavity 16 to produce excited state absorption and a reduction in ground state absorption over narrow wave bands. The device may he used as a light modulator, a temporary image storing device or means for converting I.R. light to other wavelengths. Examples are given of suitable glasses.

    ERBIUM LASER DEVICE
    46.
    发明专利
    ERBIUM LASER DEVICE 未知

    公开(公告)号：GB1201594A

    公开(公告)日：1970-08-12

    申请号：GB904569

    申请日：1969-02-19

    Applicant: AMERICAN OPTICAL CORP

    Inventor： SNITZER ELIAS

    IPC: H01S3/06 ,  H01S3/16 ,  H01S3/23

    Abstract: 1,201,594. Lasers. AMERICAN OPTICAL CORP. 19 Feb., 1969 [29 April, 1968], No. 9045/69. Heading H1C. A first laser 12, Fig. 1, which comprises a trivalent neodymium-doped laser rod 16 pumped by a flash lamp 20, is used to pump a second laser 10 the laser rod 14 of which is doped with trivalent ytterbium sensitizer ions and trivalent erbium laser ions. The first laser provides an output of 0À92 or 1À06 microns and the second laser a 1À5 micron output. As shown the resonators of the first and second lasers are formed by mirrors R1, R2 and R2, R3, respectively, the common mirror R2 and mirror R3 being dichroic so that the first laser passes its output 22 (0À92 or 1À06 microns) into the second laser resonator, while the second laser output (1-5 microns) is obtained through mirror R3. In an alternative arrangement, Fig. 2, normal mirrors R1, R2 form the first laser resonator, and a mirror R3 and a total internal reflecting facetted end 26 of the laser rod 18 form the second resonator. The first laser output 22 is introduced into the laser rod 18 through a facet S1 and follows a zig-zag internally reflecting path 30 until it emerges through a facet S2. A mirror R1 reflects the emergent pump energy back into the rod. In a modification, Fig. 3, the second resonator is formed by mirrors R3, R4 and an inclined end surface S3 of the laser rod 18, the pump energy being introduced through this surface and again following a zigzag path 30. Higher pumping efficiency is stated to be obtained by heating the second laser rod.

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