Radiation-sensitive record with protected sensitive surface
AssigneeNorth American Philips Corporation
InventorsCharles Balas, Jr., David Y. K. Lou, George C. Kenney, II
Life of this patent
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Abstract
A record structure for recording with a radiation beam uses a transparent disc or drum, a coaxial backing disc or drum and two coaxial resilient ring-shaped seals to provide an enclosure between the discs or drums. Radiation-sensitive recording material on the side of the disc or drum within the enclosure is thereby protected from ambient dust particles and other contaminations, while the gaseous or solid by-products of the inter-action between the recording material and the radiation beam in the area around which the beam impinges are substantially contained between the disc surfaces and cannot produce deposits on an objective lens used to focus the radiation beam or poison the user.
Claims19
A radiation-sensitive record comprising a first disc-shaped member, a second disc-shaped member in coaxial confronted relationship with said first disc-shaped member and spaced therefrom, a pair of coaxial sealing rings of different sizes sealed between the confronting surfaces of said first and second disc-shaped members coaxially therewith and forming an annular space therebetween, at least one of said disc-shaped members being transparent, and a radiation-sensitive recording layer on one of said confronting disc surfaces.
A radiation-sensitive record comprising a first substantially rigid relatively thick cylindrically-shaped member, a second relatively thin transparent cylindrically-shaped member having an inside diameter larger than the outer diameter of said first cylindrically-shaped member and in coaxial confronting relationship therewith, a pair of coaxial resilient substantially identical sealing rings sealed between the confronting surfaces of said first and second cylindrically-shaped members and forming a cylindrically-shaped space therebetween, and a radiation-sensitive recording layer on the surface of said first cylindrically-shaped member that is in confronting relationship with said second cylindrically-shaped member.
Dependencies are inferred from the claim text.