Lens system for a cathode ray tube projection system

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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Details

350412, 358239, 358250, G02B 1318, G02B 302, H04N 574, H04N 572

Patent

active

048242241

ABSTRACT:
An improved lens system for a projection television is described. The lens system is designed to be used with a cathode ray tube having a face glass with an aspheric surface having phosphor elements mounted thereto. The aspheric surface of the face glass has its maximum radius at the optical axis and is of lesser radius outwardly thereof. From the screen, the lens system companies a first aspheric lens of relatively weak power, a second biconvex lens of relatively high positive power, a third aspheric lens of weak positive power and a fourth lens having a concave face on its screen sider and of relatively large negative power.

REFERENCES:
patent: 2552672 (1951-05-01), Grey
patent: 2638034 (1953-05-01), Wreathall
patent: 4300817 (1981-11-01), Betensky
patent: 4348081 (1982-09-01), Betensky
patent: 4526442 (1985-07-01), Betensky et al.
patent: 4573769 (1986-03-01), Clarke
patent: 4577935 (1986-03-01), Yamakawa et al.
patent: 4620773 (1986-11-01), Fukuda
patent: 4682862 (1987-07-01), Moskovich
patent: 4685774 (1987-08-01), Moskovich
patent: 4697892 (1987-10-01), Betensky
patent: 4699476 (1987-10-01), Clarke
patent: 4699477 (1987-10-01), Clarke

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