Meiji Techno, MT9420, Binocular Polarizing Microscope, 30W Transmitted and Vertical Koehler IncidentFeatures:Built in Bertrand lens (Factory installed)Analyzer in sliding mountFirst order red compensating plate and 1/4 Wave-length test in a metal mount sliding mountNewly designed Strain free Abbe Condenser 1.25 N.A. with a built in iris in a dovetail mount that is easy to change and operates and tracks very smoothly and predictably facilitating accurate iris control with improved usabilityPolarizer in a Swing in-out click/clamp mount, fully rotatable 360° with click stop at 0° and 90°Super Widefield compensating KHW10X, focusing eyepiece with cross-line and guide pin, F.N. 20 are standard with 21mm reticle mountSiedentopf type binocular or Trinocular viewing heads are standardSmooth operating ball bearing centerable nosepiece provides effortless objective changesClear Observation Images with Newly improved ∞ Infinity Corrected Objectives ICOS Optical SystemIntermediate tube with built in Bertrand lens and analyzer and compensator slots and rotatable polarizer in a swing-out mountCeramic coated, 175mm diameter, ball bearing, circular rotating stage graduated 360°, with 1° increments and vernier reading to 0.1°. Stage equipped with easy to maintain ceramic coating allows for smooth exchange of specimens while offering maximum protection to the stage surface from abrasions and wear overtime of use. The super hard coating is durable and rugged enough to provide years of demanding useFocus tension adjustment and safety Auto-focus stage stop lever30 watt Koehler Halogen illumination allowing observation of clear images of polarization with automatic voltage sensing power supply 110V-240VCast Aluminum Alloy construction with chemical resistant finishTriangular designed frame for maximum ergonomics, greatly lessens user fatigue during hours of extended observationApplications:Environmental Research - Analysis of materials, dust and fiberMedicine and Biology - Determining composition of calculi, sediments and bio-crystallatesForensics - Identification of trace elements and materials such as explosivesMaterials Analysis - Metal, ceramics, glass, building materials, etc.Geology - Mineralogy, petrography, core drilling sample analysis, thin section identificationChemistry - Quality control of in-process or end products, compounds, pharmaceutical analysis and identification of precipitatesBrightfield. The simplest of all the optical microscopy illumination techniques. Sample illumination is incident (i.e. illumination from above and observed from above) or transmitted (i.e., illuminated from below and observed from above) white light and contrast in the sample is caused by absorbance of some of the transmitted light in dense areas of the sample. Brightfield microscopy is the simplest of a range of techniques used for illumination of samples in light microscopes and its simplicity makes it a popular technique. The typical appearance of a brightfield microscopy image is a dark sample on a bright background.Polarizing Light. A type of optical microscopy techniques involving polarized light. Simple techniques include illumination of the sample with polarized light. Directly transmitted light can, optionally, be blocked with a polarizer orientated at 90 degrees to the illumination. More complex microscopy techniques which take advantage of polarized light include differential interference contrast microscopy and interference reflection microscopy.The MT9420 Series Incident and Transmitted Polarizing Microscope is an investigative tool for isotropic and anistropic materials. This series is the most suited in generating interference figures and in mineralogy in the scientific study of crystal structure and physical (including optical) properties of minerals. Specific studies include process of mineral origin and formation, classification of minerals, their geographic distribution as well as their utilization. Ergonomic placement of controls allows for stress free operation, increased lab efficiency and maximum productivity. Our redesigned polarizing condensers enhance performance in polarized light, yielding unmatched image contrast, provide exceptionally bright, crisp images with good color rendition and superior flat fields of view. A perfect instrument for geology, petrology, mineralogy, forensics, material science, manufacturing, crystallography, medical research, environmental science and industrial quality control and quality assurance applications.