High NA Microscope Objective

High NA Microscope Objective with Variable Spherical Aberration Correction

US20160041379A

20X Plan Achromat Microscope Objective with a 0.5 NA and an adjustable spherical aberration collar for correcting for microscope slide or cover glass thickness.  Capable of working in air, through a 0.17 mm thick cover slide, or through a 1 mm thick glass slide.  Designed for fluorescent imaging of biomedical samples such as cells in well plates, pathology slide samples and general purpose inspection it can resolve objects as small as 0.5 um with high contrast.