OPTICAL DEVICE, IMAGING SYSTEM WHICH INCORPORATES THE OPTICAL DEVICE AND METHOD IMPLEMENTED BY THE IMAGING SYSTEM FOR IMAGING A SPECIMEN

摘要

An optical device is described herein which is a four mirror objective with a large numerical aperture and a small central obscuration. The four mirror objective places two Schwarzschild-like objectives in series with respect to one another. This allows a large numerical aperture, a long working distance, and small central obscuration. Each objective has a primary and secondary mirror. An imaging device and method for imaging a specimen are also described herein.