Spatial filter having aerodynamic windows

Details Spatial filter having aerodynamic windows Spatial filter having aerodynamic windows

1977-12-21

1979-05-01

Stern, Ronald J.

Oscillators

Relaxation oscillators

350 17, 350319, 331 745D, 331 745P, G02B 520, G02B 500, H01S 302, H01S 304

Patent

active

041520491

ABSTRACT:
An improved spatial filter for operation with high power laser beams is provided wherein a first gas flow system and a second gas flow system cooperate to enclose a cavity therebetween capable of accommodating a filter having an aperture located therein for spatially filtering the beam. The first and second gas flow systems are adapted for providing a first aerodynamic window across a beam entrance and a second aerodynamic window across a beam exit to maintain a selected gas pressure within the cavity while providing a transmission path for a high power laser beam. The first and second aerodynamic windows are in optical line of sight communication with one another through the aperture in the filter.

REFERENCES:
patent: 3617928 (1971-11-01), Hausmann
patent: 3654569 (1972-04-01), Hausmann
patent: 3704053 (1972-11-01), Farmer
patent: 3907409 (1975-09-01), Hausmann
patent: 3918800 (1975-11-01), Griffin
patent: 3973218 (1976-08-01), Kepler et al.

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