Multi-way focusing system and method for laser radiation focusing, provides multiple passage of the laser beam through the measurement volume

摘要

1. Multiport focusing system, comprising a lens for focusing the laser beam and a mirror for returning it to the measuring volume, characterized in that the system comprises placed on a common base and one more able to move in a direction towards the focal point of optical element assemblies, each of which comprises two planar rotary mirror aligning head providing independent tilt of each mirror in two directions, and refocuses the lens therebetween, mounted coaxially with the reflected laser beam m at twice the focal length along the beam by measuring the amount in the provisions that provide the focus of the reflected beam at the same point, and one assembly comprising a lens and a plane mirror or just concave mirror directs the laser beam so that it passes all its way in the reverse direction, the number of passes is 4 more depending on the number of installed optical assemblies elementov.2. A method of focusing laser radiation, providing multiple passage of the laser beam through the measuring volume of a system of lenses and mirrors, characterized in that the laser radiation is polarized perpendicular to the plane of the base of a multi-pass system, the laser beam propagates in a plane parallel to the base plane multistage system has passed through the object of investigation laser beam misses the assembly of optical elements including two planar rotary mirror aligning head providing independent tilt of each mirror in two directions, and the lens refocuses therebetween mounted