Abstract: A system and method for a variable working distance microscope is disclosed. The variable working distance microscope includes an eyepiece; a binocular system optically coupled to the eyepiece; a stereo zoom system optically coupled to the eyepiece and the binocular system; and a variable working distance lens system optically coupled to the eyepiece, the stereo zoom system, and the binocular system. The variable working distance lens system includes a first lens; a second lens positioned in series with the first lens; and a movable third lens positioned in series between the first and second lenses, the movable third lens configured such that a change in a distance between the moveable third lens and the first lens changes a working distance of a microscope.

Abstract: A fluid separator which includes an outer housing and a center fluid inlet tube which has a beveled lower end. Fluid enters the top of the housing into the inlet tube rotating as it passes downwardly through the tube and out the beveled end with the heavier particulate matter in the fluid settling to the bottom of the housing and the separated fluid being directed upwardly along the housing to the exterior of the inlet tube and out an outlet port in the housing.