초록 ▼

A wide angle laser window for directing a coherent radiation beam through the skin of an aircraft to or from a distant point located at a varying azimuthal position with respect thereto is comprised of a fluid prismatic window including a first beam-transmissive window panel disposed aerodynamically

A wide angle laser window for directing a coherent radiation beam through the skin of an aircraft to or from a distant point located at a varying azimuthal position with respect thereto is comprised of a fluid prismatic window including a first beam-transmissive window panel disposed aerodynamically with respect to the skin of the aircraft, a second beam-transmissive window panel disposed inwardly proximate the first in pivotable relationship therewith, a flexible seal securing the panels to define a fluid cell therebetween, and a beam-transmissive fluid charged to the cell; wherein the indices of refraction for each of the panel members and the fluid are matched to yield a variable angle prism having substantially uniform optical properties. A laser system incorporating a plurality of the aforesaid windows located circumferentially about an aircraft permits beam steering over a wide range of angles substantially enveloping the craft.

대표청구항 ▼

A wide angle laser window particularly adapted to be mounted to an aircraft to direct coherent radiation from the aircraft to a distant point or from the distant point to the aircraft along paths that vary angularly relative to the aircraft, wherein the aircraft has an outer skin portion defining an

A wide angle laser window particularly adapted to be mounted to an aircraft to direct coherent radiation from the aircraft to a distant point or from the distant point to the aircraft along paths that vary angularly relative to the aircraft, wherein the aircraft has an outer skin portion defining an aerodynamically contoured aircraft surface, said window comprising: a. a first outer beam transmissive window panel which has an index of refraction of n1 and which has an outer surface that is in an aerodynamically aligned position at the aerodynamically contoured aircraft surface so as to blend aerodynamically with said aircraft surface, said first panel being mounted to the aircraft in a manner that the outer surface of the first panel remains in its aerodynamically aligned position during operation of the window to direct or receive said radiation along paths of differing angularity of alignment, b. a second beam transmissive window panel having an index of refraction n2 and positioned inwardly of, and in general alignment with, said first panel, said second panel being pivotally mounted relative to the first panel so as to be able to change its angular relationship relative to the first panel and thus change angle of alignment of a beam passing to or from said first panel, c. flexible seal means joining said first and second panels to define a fluid cell therebetween and to contain therein a beam transmissive fluid having an index of refraction n3, d. said indices of refraction n1, n2 and n3 being substantially matched for generally undegraded transmission of a continuous beam of coherent radiation across the skin of the aircraft.