Patents Assigned to Laakmann Electro-Optics, Inc.
  • Hollow waveguide having plural layer dielectric
    Patent number: 4688893
    Abstract: A hollow waveguide has an inner reflective layer such as silver, overcoated with plural layers of dielectric. Preferably three dielectric layers are used, with the inner two having quarter wave thickness, and the outer one having one half on one and one half the quarter wave thickness. Compositions for the dielectric include ThF.sub.4 /Ge/ThF.sub.4, ZnSe/Ge/ZnSe, Ge/ThF.sub.4 /Ge, and ThF.sub.4 /ZnSe/ThF.sub.4.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: August 25, 1987
    Assignee: Laakmann Electro-Optics, Inc.
    Inventor: Katherine D. Laakmann
  • Hollow waveguides having disparate dielectric overcoatings
    Patent number: 4688892
    Abstract: A hollow waveguide has a rectangular or square internal cross-section, with all internal surfaces coated with a reflecting metal such as silver. One pair of opposing surfaces is dielectric overcoated of a thickness less than half the quarter wave thickness, while the other pair of opposing surfaces is dielectric overcoated with a different material and has a thickness which is an integral multiple of the quarter wave thickness. ThF.sub.4, ZnSe, and Ge are suitable materials.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: August 25, 1987
    Assignee: Laakmann Electro-Optics, Inc.
    Inventor: Katherine D. Laakmann
  • Hollow waveguide
    Patent number: 4652083
    Abstract: A flexible hollow waveguide has an optically smooth, rectangular cross section internal channel, in which reflecting metal is overcoated with a ThF.sub.4 or ZnSe dielectric approximately one-half of the quarter wave thickness. CO.sub.2 laser propagation is promoted for guide curvatures down to about 5 cm radius of curvature.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: March 24, 1987
    Assignee: Laakmann Electro-Optics, Inc.
    Inventor: Katherine D. Laakmann