North American Philips Corporation

Phyllis M Harnack

Brian J Fitzpatrick

Scott H Baker

A cathode-ray tube device for generating a bright light spot is provided, in the path of radiation, a container with a coolant from the cathode-ray tube containing a solution of about 0.5-2.0% by weight of a surfactant selected from the group consisting of sorbitan esters of fatty acids of 12-18 carbons, polyoxyethylene derivatives thereof and ethers of polyoxyethylene in polyethylene glycol 200-300 all of said container in contact with said solution being formed of polymethyl methacrylate and all surfaces of which container are in contact with said solution are provided with a thin layer of silicon dioxide.

Cathode ray tube device with improved coolant

A method for producing an optical waveguide which comprises imersing a wafer of K.sub.1-x Rb.sub.x TiOMO.sub.4, wherein 0.ltoreq.x.ltoreq.1, and M is P or As, for 1-64 hours in molten potassium nitride at 400.degree.-500.degree. C., followed by washing and immersing in a molten salt of Rb, Cs, or Tl at 240.degree.-335.degree. C., thereby causing the Rb, Cs, or Tl to replace the K or Rb cations. The resultant product has reduced mechanical damage to the waveguide surface.

Method of reducing surface damage in KTP optical waveguides

Halos occurring around bright light spots generated by cathode ray tube devices in which the light emitted by the tubes is filtered by filtering solutions are significantly reduced by the addition of cinnamic alcohol and/or cinnamaldehyde to the solution.

Cathode ray tube device with improved color filtering system

A method for purification of Group II-VI crystals by contacting with a zinc melt.

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Hastings on Hudson, NY, United States of America

Phyllis M Harnack