• Powerful polarization microscope with 360° rotatable polarizer
• Binocular head; 30° inclined, 360° rotating
• Koehler Quartz halogen 6V/30W with intensity control
• 12V/50W halogen Epi-illumination with external lamp house
• Eyepieces: N-WF10X/20mm with diopter adjustment

The Motic BA310 POL is a powerful polarization binocular microscope with 12V/50W halogen Epi-illumination with an external lamp house. This microscope is especially meant for the examination of birefringent samples from petrography and mineralogy but can also be used for synthetic materials like foils or fibers from industrial production. The BA310POL also works well in educational environments of material professions, where affordability and ease of use is a key issues.

Smooth Movement and Precise Positioning 

The BA310POL microscope stand carries a pre-centered stage with a hard coated surface to withstand abrasion even under rough usage. A high-precision ball-bearing mechanism ensures a smooth rotation for precise positioning of the sample. The fully rotatable polarizer is fixed to the sub-stage condenser carrier.

The ball-bearing 4-fold nosepiece shows a reversed orientation. In reference to a given objective position, all other objectives can be centered individually. All eyepiece tubes allow the mounting of the crosshair eyepiece both in an orthogonal and diagonal cross position. Incorporating an interpupillary distance of 55-75mm, the BA310POL observation tubes guarantee hours of fatigue-free viewing.

For the specific demands of the BA310POL microscope, Motic introduced a set of strain-free EC Plan Achromatic objectives. Following the CCIS concept, these objectives are made of high-quality glass with multi-layer coating for better contrast. The tube lens provides a completely corrected intermediate image with photo port for high quality documentation. Further objectives from Motic’s BA series may also be used, keeping the minimized degree of extinction in mind.

The standard high eyepoint eyepieces N-WF 10X/20mm provide consistent diopter adjustment for both eyes. As required for polarization work, one eyepiece is equipped with a fixed crosshair reticle.

As an integral part of the BA310POL packages, the Intermediate tube carries a Bertrand lens, both focusable and centerable, and additionally the analyzer, thus revealing conoscopic information of crystal substructures. Moreover, a built-in slot allows the use of optional retardation and compensator sliders. The first order (also known as full wave or λ plate) retardation plate certainly will be most interesting, while the use of Quarter-wave retardation plate (1/4 λ) and Quartz wedge compensator plate are less common.

The Transmitted illumination is based on a 30W Halogen light source. With an adjustable field diaphragm and aperture diaphragm, Full Koehler quality is given in terms of a homogenous illumination and reduced stray light. The Achromatic Swing-out condenser with N.A. 0.90/0.13 is strain-free and contributes to a darkest possible image background.

When incident illumination is needed, the BA310 POL EPI allows the replacement of the Intermediate tube by the Epi-Illuminator, at the same time requiring LM Plan objectives without cover glass correction.