Variable attenuator for laser radiation

Details Variable attenuator for laser radiation Variable attenuator for laser radiation

1980-02-25

1982-05-04

Corbin, John K.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250513, G02B 518, G21K 104

Patent

active

043279660

ABSTRACT:
The invention relates to a variable attenuator having two phase gratings (1 and 2) with rectangular grooves. In a first embodiment of the present invention the gratings are slidably mounted (10, 20, 30) so that the gratings have the grooves parallel and the faces in close proximity. As one grating is translated relative to the other the light passing through the device may be varied from total extinction to substantially total transmittance. A single device can be fabricated to provide this attenuation for radiation spanning the visible spectrum. In other embodiments the gratings are fixed relative to one another and the entire device is moved relative to the beam to be attenuated.

REFERENCES:
patent: 1800044 (1931-04-01), Baird
patent: 3585121 (1971-06-01), Franks et al.
patent: 3603668 (1971-09-01), DeBitetto
patent: 3957354 (1976-05-01), Knop
patent: 4009939 (1977-03-01), Okano
patent: 4062628 (1977-12-01), Gale
patent: 4093346 (1978-06-01), Nishino et al.
Guild, J., The Interference Systems of Crossed Diffraction Gratings, The Clarendon Press, Oxford, 1956, pp. 1-6, 26-47 and 96-98.

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