Reflective multi-immersion microscope objectives
2023, Voigt, Fabian F., Naert, Thomas, Bahl, Armin, Lienkamp, Soeren S., Helmchen, Fritjof
We present a novel way of designing multi-immersion microscope objectives inspired by both the mirror-based eyes of scallops and the Schmidt telescope, a wide-field telescope invented in the 1930s. Despite containing only two optical elements and without a correction collar, our design achieves diffraction-limited imaging performance over mm-scale field-of-views in air and in any homogeneous liquid medium. Based on our concept, we built a prototype two-photon microscope objective and demonstrated its versatility by imaging Xenopus tadpoles cleared with BABB (n=1.56) and by imaging the larval Zebrafish brain in vivo in water.