Phosphor screen for correcting luminous non-uniformity and metho

Details Phosphor screen for correcting luminous non-uniformity and metho Phosphor screen for correcting luminous non-uniformity and metho

1990-11-01

1992-04-28

Lee, John D.

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

313372, G02B 600

Patent

active

051094690

ABSTRACT:
To correct luminous non-uniformity of light provided by a phosphor screen, the phosphor efficiency is varied across the diameter of the phosphor screen. A material that reduces the efficiency of phosphor is deposited on the face of the phosphor screen, such that the material compensates for the luminous non-uniformity and provides a uniform distribution. The material, which can be aluminum, is deposited onto the phosphor screen by a evaporation process.

REFERENCES:
patent: 3977855 (1976-08-01), Cole
patent: 4656562 (1987-04-01), Sugino
patent: 4821114 (1989-04-01), Gebhardt
patent: 4904049 (1990-02-01), Hegg
patent: 4909609 (1990-03-01), McDowell
patent: 4932752 (1990-06-01), Krashkevich et al.

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