The Van Guard 1431BRi clinical microscope has a trinocular viewing configuration, Brightfield configuration, integrated Koehler illumination, plan achromatic objectives, and magnification abilities of 4X, 10X, 40X and 100X, (oil immersion method) for a variety of applications. This compound microscope enhances object or image resolution, and is commonly used in demanding applications, including diagnostic and educational uses in medical and veterinary clinics, universities, and industrial laboratories.

This microscope features a trinocular viewing configuration, with two eyepieces to ease eye strain and provide a more comprehensive view, and a third head to connect to an external monitor or camera. The microscope has a 20/80 light split, which means that when a third head is used, 20% of the light goes through the third head, and 80% goes to the user’s eyes through the binocular heads. The unit has 55-75mm interpupillary adjustment for individual eye spacing, and - 6 to + 6 dioptric adjustment capabilities to compensate for the difference in viewing ability between each eye. It has a VanGuard infinity-corrected optical system (VIOS) for clear images. The microscope has Deutsches Institut für Normung (DIN)-standard plan achromatic objective lenses, which correct for red and yellow chromatic aberrations, and sharpen images. Adjustable resolution provides resolvant options of 4X, 10X, 40X, and 100X (0.10, 0.25, 0.65, 1.25 numerical aperture [NA]) (oil immersion method). Integrated Koehler illumination controls brightness, and Brightfield configuration controls light from below, allowing a specimen to absorb light for clear illumination. The unit adjusts light through a 1.25 NA Abbe condenser, with an iris diaphragm. The condenser is mounted on a rack and pinion focusing mechanism, and the unit has a filter holder on the collector. The unit has 20-watt variable quartz halogen lighting. It has a 10X widefield eyepiece magnifier, which locks