Zeiss Stemi 305 Operating Manual

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Zeiss Stemi 305 Operating Manual Manual pdf 31 page image

Stereo microscope OPERATION ZEISSStemi 305 Setting reflected-light illumination09/2017 435063-7144-008 29English4.2.2 Spot illuminator• Push spot illuminator in the guide to therequired height (Fig. 21/2).In the lower positions, an oblique lighteffect is created to produce castshadows for enhancing surface struc-tures.• Set the angle (Fig. 21/1) via the pivot of thespot illuminator so that the object is optimallyilluminated.• Set size and brightness of the spot by axiallyshifting the focusing unit (Fig. 21/3)(illumination zoom).For switching the illumination intensity ONand OFF and adjusting the illuminationintensity refer to section 4.2.1, page 28.4.2.3 Double spot illuminator• Move the microscope body to its uppermostposition via the focusing knob (Fig. 22/1). Pushdouble spot illuminator (Fig. 22/2) to therequired level within the guide.• Bend the two goose necks (Fig. 22/3) to adjustthe spots so that the specimen is optimallyilluminated.For switching the illumination intensity ONand OFF and adjusting the illuminationintensity refer to section 4.2.1, page 28.Here again, an oblique light effect canbe produced in the lower positions withthe goose neck set horizontally.The spot illuminator and the double spot illuminator have a thread M24 for placingpolarization filters in front. The appropriate analyzer is screw-fastened in the M52x1.0 threadof the microscope body (Fig. 7/4).By turning the spot polarizers, overexposure reflexes on the specimen can be reduced.Fig. 21 Setting the spot illuminatorFig. 22 Double spot illuminator