Detecting IR and mm radiation

Details Detecting IR and mm radiation Detecting IR and mm radiation

1979-11-16

1981-10-06

Anderson, Bruce C.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250423P, G01J 100

Patent

active

042937698

ABSTRACT:
An atomic beam is excited by laser radiation to a state with large principal quantum number. The beam is irradiated with infrared or millimeter wave radiation which is to be detected. The atoms absorb the radiation by making transitions to higher-lying states. The transitions are sensed by applying an electric field which ionizes atoms in the final state, but not the initial state. The ions ae collected and detected by conventional pulse-counting or direct current methods.

REFERENCES:
patent: 3443087 (1969-05-01), Robieux
patent: 3478204 (1969-11-01), Brubaker et al.
patent: 3987302 (1976-10-01), Hurst et al.
patent: 4020350 (1977-04-01), Ducas
"Stark Ionization of High-Lying States of Sodium", Ducas et al., Phy. Rev. Lett., vol. 35, No. 6, Aug. '75, pp. 366-369.

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