Dual-secondary mirror cassegrain optical system

Details Dual-secondary mirror cassegrain optical system Dual-secondary mirror cassegrain optical system

1982-01-11

1984-03-27

Corbin, John K.

350299, G02B 2302

Patent

active

044390122

ABSTRACT:
The dual-secondary mirror optical system utilizes, in principle, the Cassain optical system. An apertured, single, primary mirror is coaxially aligned with two secondary mirrors to provide coaxial transmit and receive optical paths. Separation of the optical paths is in radial distance from the central optical axis. An apertured secondary mirror in conjunction with the primary mirror directs the transmitted beam, providing a hollow expanded output beam. The other secondary mirror in conjunction with the primary mirror directs received radiation coaxially within and spatially separated from the hollow transmitted beam, providing dual transmit receive operation.

REFERENCES:
patent: 536759 (1895-04-01), Potter
patent: 3371212 (1968-02-01), Weiss
patent: 3527526 (1970-09-01), Silvertooth
patent: 3614449 (1971-10-01), Ward
patent: 3781552 (1973-12-01), Kadrmas
patent: 3907408 (1975-09-01), Engel
patent: 3968362 (1976-07-01), Mocker
patent: 4165936 (1979-08-01), Eisenring et al.
patent: 4363533 (1982-12-01), Stowe et al.

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