초록

An improved shared aperture sampler for high power laser beams includes a buried mirror positioned behind a dichroic reflective surface that reflects the high power beam and permits the sample beam to pass through and to be focused or deflected by the buried mirror.

대표청구항 ▼

CM,1. A laser system comprising: a laser for generating a laser output beam having a laser frequency range, a laser beam radius and traveling along an output beam axis in an output direction; an optical train for transmitting and directing said laser output beam, for receiving a target return beam r

CM,1. A laser system comprising: a laser for generating a laser output beam having a laser frequency range, a laser beam radius and traveling along an output beam axis in an output direction; an optical train for transmitting and directing said laser output beam, for receiving a target return beam responsive to said laser output beam, and for directing said target return beam substantially along said output beam axis in a return direction opposite to said output direction; a shared aperture optical sampler included in said optical train and having a first surface disposed to receive both said laser output beam and said target return beam, said first surface being refractive in said laser frequency range and transmissive in a second frequency range, and a second surface behind said first surface that is reflective in said second frequency range, whereby a sample portion of radiation in said target return beam that is within said second frequency range penetrates said first surface and is reflected from said second surface to form a sample target return beam; optical detection means for receiving a selected portion of said sample target return beam and generating a return beam signal in response thereto; control means connected to said optical detection means, for receiving said return beam signal and generating optical control signals; and a controllable optical element within said optical train and connected to said control means, for adjusting said laser output beam in response to said optical control signals; characterized in that: said second surface has a non-planar contour symmetric about said output beam axis and having a predetermined focal length to focus said sample target return beam; said optical train includes a sampling optical element, having a sampler radius substantially different from said output beam radius and located along said output axis at a distance displaced from said shared aperture optical sampler in said return direction by approximately said predetermined focal length, whereby said sample target return beam is removed from said optical train.