The phase contrast condenser annular diaphragm plates - أطلس مختبرات العرب

The phase contrast condenser annular diaphragm plates are inserted into the appropriate position in the turret and secured into place with a spring clip that rides inside the periphery of the turret opening. Tension from the spring clip forces the annulus plate against a set of adjustment screws (or threaded pins) utilized for centering the annulus in the optical pathway (as illustrated in Figure 3). Several manufacturers offer condenser systems designed specifically for phase contrast that feature an integral annulus centering system. These condensers usually have a set of adjustment knobs that can be actuated by depressing the shaft of each knob until it locks into an annulus adjustment screw. After the screws are engaged, twisting the knobs will enable the operator to center the condenser annulus with respect to the objective phase plate.