Laser screen for a cathode-ray tube and method for making same
AssigneesPrincipia Optics, Inc., P.N. Lebedev Institute of Physics
InventorsVladimir I. Kozlovsky, Andrey A. Kolchin
Life of this patent
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Abstract
In a laser screen for a cathode-ray tube having a semiconductor member of a semiconductor compound positioned between a partly transparent mirror and a reflecting mirror, an intermediate member is grown by deposition from vapor phase on the partly transparent mirror. The intermediate member is made of a semiconductor material transparent for radiation generated by the screen and has a bandgap width which is at least 0.98 times as great as the bandgap width of the material of the semiconductor member. The intermediate member is cemented to a transparent heat removing support member.
Claims7
A laser screen, comprising:
- a heat removing support member;
- an optical cavity comprising a partly transparent mirror and a reflecting mirror, operable in response to an applied electron beam for generating laser radiation;
- an active semiconductor member constructed of a semiconductor compound positioned between said partly transparent mirror and said reflecting mirror;
- an intermediate member made of a semiconductor material transparent for radiation generated in said optical cavity having a bandgap width which is at least 0.98 times as great as the bandgap width of the material of said semiconductor member;
- said partly transparent mirror being formed on said semiconductor member;
- said intermediate member being grown on said partly transparent mirror;
- and
- said heat removing support member being cemented to said intermediate member.
A method for making a laser screen having a heat removing support member, an optical cavity comprising a partly transparent mirror and a reflecting mirror, an active semiconductor member which has a first side and a second side opposite to said first side and which is made of a semiconductor compound, and an intermediate member of a semiconductor compound transparent for radiation generated in the optical cavity, said method, comprising the steps of:
- polishing a first side of the semiconductor member;
- forming a partly transparent mirror on the polished first side of the semiconductor member;
- overgrowing on the partly transparent mirror an intermediate member of a semiconductor compound having a bandgap width which is at least 0.98 times as great as that of said semiconductor member;
- cementing the support member to the intermediate member;
- polishing the second side of the semiconductor member;
- forming the reflecting mirror on the second polished side of the semiconductor member.
Dependencies are inferred from the claim text.