Support for a transmissive optical element, laser processing device with such support, and process of adjusting the position of a transmissive optical element using such support

A holder for a transmissive optical element is specified, having a frame and a mount for the transmissive optical element. The mount is mounted within the frame with two adjusting elements and with a guide pin arranged between the adjusting elements and its distance from the frame can be adjusted. The adjusting elements are each mounted in the frame so that they can pivot and are adjustable in their respective lengths independently of one another. The mount-side ends of the adjusting elements can each be pivoted in the mount and are attached so that they can be displaced in the longitudinal direction of the respective adjusting element. The frame-side end of the guide pin is fixed to the frame, and the frame-side end of the guide pin is pivotably mounted in the frame in the X and Y directions and slidable in the longitudinal direction of the guide pin. A method for adjusting the position of a transmissive optical element is also specified.