Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1990-04-27
1991-11-12
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
356152, H01J 4014
Patent
active
050650050
ABSTRACT:
A polychromatic mutual alignment device is suitable for use in an aiming apparatus having a laser delivering a parallel light beam and a plurality of light receivers to be harmonized with the laser. The device comprises an optical mixer having at least two source-forming holes each receiving light delivered in a respective one of a plurality of spectral ranges for which alignment is to be achieved and a plate which is transparent in a wave length range and reflective in another wave range for combining the two light beams into a common mixer output beam; and a parabolic mirror having an axis and placed so as to receive the output beam at an angle with respect to said the axis, the mixer and the mirror being constructed so that all the source-forming holes are at the focal point of the mirror. The mixer further comprises a sensor responsive in the transmission range of the parallel light source and is so constructed that, when the light beam from the parallel light beam source is coaxial with the output beam, the sensor is at the focus of the mirror.
REFERENCES:
patent: 4811061 (1989-03-01), Sud et al.
Encaoua Serge
Metivier Philippe
Keesee LaCharles P.
Nelms David C.
Societe d'Applicitons Generales d'Electricite et de Mecanique
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