Patent
1986-10-29
1988-04-19
Corbin, John K.
350 65, 350486, 33 1PT, G02B 2610
Patent
active
047385006
ABSTRACT:
An electromagnetic drive system drives the oscillating secondary mirror or wobble mirror of a reflecting telescope. The driving force of the drive system is directly proportional to the current and the drive system is digitally controllable. By incorporating a tachometer generator and a contactless operating position measuring unit, it is possible to select such function curves for the leading and trailing edges of the wobble function which will permit a jolt-free drive of the mirror.
REFERENCES:
patent: 3654553 (1972-04-01), Mary et al.
patent: 4021096 (1977-05-01), Dragt
patent: 4073567 (1978-02-01), Lakerveld et al.
patent: 4393591 (1983-07-01), Conta
patent: 4495700 (1985-01-01), Ernst
patent: 4613203 (1986-09-01), Proetel et al.
patent: 4636792 (1987-01-01), Watson
Grupp Manfred
Stacklies Horst
Ben Loha
Carl-Zeiss-Stiftung
Corbin John K.
Ottesen Walter
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