Focusing reflector

摘要

A focusing reflective mirror which is fabricated of a hoop structure having a reflective metalized membrane stretched over one face thereof and a metalized backing membrane over the opposite side forming a closed reflective structure. The contour of the flexible reflective surface is controlled by a differential pressure between the enclosed area behind the reflective surface and the ambient pressure. The particular configuration or contour of the reflective surface is controlled by a electropneumatic control system wherein a capacitive member is mounted behind the reflective surface and within the reflective structure which senses the distance between the capacitive member and the reflective surface and adjusts the focus by varying the relative pressure within the enclosed area behind the reflective member.