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ANTI-GLARE IMPROVEMENT FOR

OPTICAL IMAGING SYSTEMS

NASA Case No. NPO-10337

Address inquiries to:

NASA Pasadena Office Belgium, Canada, France, Great Britain, Attn: Patent Counsel Italy, Japan, West Germany

Mail Code: 180-601
4800 Oak Grove Drive
Pasadena, CA 91103

U.S.A.
(Corresponding to U.S. Patent No. 3,488,103)

This invention is directed to an anti-glare baffle for shading rays such as light rays or other radiant energy rays which emanate from outside a desired field of view. The device may find use in sensitive still and movie cameras, light meters, telescopes, radiometers, photometers, electro-optical position sensors, photocell shades, star tracking devices and the like. The anti-glare baffle has a specularly reflective surface formed from an oblate hemispheroid. A shading flange extends inwardly from the upper edge of the hemispheroid and intersects the foci of the oblate hemispheroid. The oblate hemispheroid and flange surround a viewing aperture and spaced ray detecting device.

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METHOD FOR THE REPAIR AND MAINTENANCE

OF DENTAL ENAMEL

NASA Case No. ERC-10338

Canada

Address inquiries to:
Marshall Space Flight Center
Attn: Patent Counsel
Mail Code: CC01
Huntsville, AL 358121
U.S.A.

(Corresponding to U.S. Patent No. 3,679,360)

A process for the preparation of calcium phosphate salts wherein a

surface of a tooth. The use of the gel diffusion process to deposit the constituents of tooth enamel onto the surface of a weak or damaged tooth and thereby effect repair of the tooth is disclosed. USE OF UNILLUMINATED SOLAR CELLS AS

SHUNT DIODES FOR A SOLAR ARRAY

NASA Case No. GSC-10344

Canada, France, Netherlands, Italy, Japan, Great Britain, West Germany

Address inquiries to:
Goddard Space Flight Center
Attn: Patent Counsel
Mail Code: 204
Greenbelt, MD 20771
U.S.A.

[Corresponding to U.S. Patent No. 3,672,999) An improvement has been made in the electrical interconnection of solar cells in an array of solar batteries. Each individual cell of a shaded battery is electrically connected in parallel with a corresponding cell of an illuminated solar battery. The p-n junction solar cell of the shaded battery provides a forward biased diode equivalent in a by-pass conducting path around the corresponding illuminated cell in the event it becomes non-conductive. Thus, uninterrupted current flow is maintained in the event the illuminated cell fails to function.

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POTASSIUM SILICATE-ZINC COATINGS NASA Case No. GSC-10361

Address inquiries to:

Goddard Space Flight Center Canada, France, Italy,

Attn: Patent Counsel Japan, Great Britain,

Mail Code: 204
West Germany,

Greenbelt, MD 20771
U.S.A.

(Corresponding to U.S. Patent No. 3,620,784) Zinc dust coatings which, when dried on a metal surface, are crack, craze, and abrasion resistant. The coatings are formed by combining a potassium silicate solution with zinc dust and, optionally, including an alkyl trialkoxysilane. These compositions of basically inorganic materials are intended primarily for the protection of metals subject to adverse environmental conditions.

DEPOSITION OF FILMS

NASA Case No. LAR-10362

Canada, France, Japan,
Great Britain, West Germany

Address inquiries to:
Langley Research Center
Attn: Patent Counsel
Mail Code: 456
Langley Station
Hampton, VA 23665
U.S.A.

(Corresponding U.S. Patent Application Pending)

A system for depositing multilayer protective coatings on a glass or quartz substrate wherein a single heat source evaporates selective ones of a plurality of vaporizable metal coatings contained in the vacuum chamber with the substrate to be coated. The metal coating materials are contained in an electrically grounded crucible with an electrical potential of approximately 2000 volts being generated between the crucible and a cathode filament and wherein a magnetic field is provided perpendicular to the propagation direction of the electrons generated for bending the electron beam trajectory toward the coating metal contained in the crucible.

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