Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1985-10-18
1988-02-23
Orsino, Jr., Joseph A.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
200 6102, 455603, H04B 900
Patent
active
047275936
ABSTRACT:
Line of sight optical communications apparatus comprising a plurality of optical beam reflectors arranged in a protected region for optical communication therebetween, at least one of the reflectors being arranged to reflect a signal received at the reflectors to a base location remote from the protected region. Stabilized reflector apparatus which is insensitive to rotation about axes lying in a given plane and which is particularly useful in the line of sight optical apparatus is also described.
REFERENCES:
patent: 3633158 (1972-01-01), Heibel
patent: 4023887 (1977-05-01), Speers
patent: 4099050 (1978-07-01), Sauermann
patent: 4114151 (1978-09-01), Denne et al.
patent: 4131791 (1978-12-01), Lego, Jr.
patent: 4325146 (1982-04-01), Lennington
patent: 4436376 (1984-03-01), Fergason
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