X-ray technology provides a number of powerful tools used in many different areas of science and industry. The ability to focus x-rays is the key to a wide range of applications including medicine (diagnosis and therapy), industrial applications (lithography and inspection), astronomy (space telescopes) and x-ray imaging (microscopy and analysis). This work presents the design and microfabrication of a novel x-ray micro optical system for use in an x-ray microprobe for analysis of biological cells. A reflective micro-optical system capable of focusing a wide range of wavelengths is at an advanced stage of development. The lens system consists of a pair of microfabricated optical elements, one of which has variable curvature providing a unique mechanically-actuated zoom focusing capability. Experiments have been carried out to measure the changes of the focal length (lens curvature) and sensor calibration.