Short-focus silicon parabolic lenses for hard X-rays

摘要

Parabolic lenses have been formed by photoanodic etching of silicon in the form of profiles 22 µm deep and 5 µm in diameter. Observations with 17.46 keV radiation show that the focal length of the lenses is 7 cm and images with resolution of 3 µm have been obtained. A procedure to evaluate the quality of real refracting profiles is suggested.