MAGUS Pol 800 Polarizing Microscope

Magus Pol 800 Polarizing Microscope

Magnification: 40–600x. Trinocular head, plan achromatic objectives. Transmitted light illumination, light source: 30W halogen bulb, Köhler illumination. Bertrand lens and compensators.

This microscope is designed for studying anisotropic geological, biological, and polymeric samples with polarized and transmitted light.

A polarizing microscope uses the birefringence of an anisotropic sample to generate an image. When polarized light passes through an anisotropic sample, it splits into two beams and changes the polarization plane. The analyzer brings the vibrations of the beams into the same plane and axis, thus causing destructive and constructive interference between the two wave fronts. The bright, high-contrast image changes color as the stage rotates.

This microscope has strain-free objectives. The intermediate tube contains the analyzer and Bertrand lens and has a slot for installing compensators. This microscope is used in crystallography, petrography, mineralogy, forensic science, and other fields of science.

Microscope Head

Trinocular head with infinity-corrected plan achromatic objectives. Digital imaging devices are installed in the trinocular tube. The eyepiece/camera light path selector knob allows you to direct the light beam to the digital camera or to the eyepiece tubes.

The diopter adjustment knob is located on the left tube.

Revolving Nosepiece

Five objectives. An additional objective can also be installed in a free position on the nosepiece to increase the magnification. The design of the revolving nosepiece leaves clear space above the stage by being located below it, so that the user can see which objective is inserted in the optical path. The positions of the revolving nosepiece are centered to align the optical axis of the objective and the microscope.

Objectives

Infinity-corrected plan achromatic objectives are specifically designed for observations with polarized light: The strain-free optics ensure that birefringence comes from the observed sample and not from the optical elements. Objectives designed for use with 0.17mm thick coverslips.

Focusing Mechanism

Coaxial coarse and fine focusing knobs are located on both sides at the bottom of the microscope body. The user can rest their hands on the table while using the microscope, allowing for relaxed work. Focusing adjustment is smooth and effortless.

The design of the focusing mechanism allows for quick adjustment of the microscope after changing the sample under study. For this purpose, a coarse focus lock knob is located on the right side. The coarse focus tension can be adjusted by rotating the ring on the left side.

Stage

The stage can rotate 360° to view the color change of the sample when the polarizer and analyzer are arranged perpendicular to each other. The stage has a rotation angle scale. With the Vernier scale, measurements are made with an accuracy of 0.1°.

The stage can be centered with two screws because the analysis of an anisotropic object with polarized light requires precise alignment of the stage's rotation axis with the microscope's optical axis.

Light Source

Halogen bulbs emit light with a color temperature that allows for comfortable work. The 30W bulb is bright enough to make observations with objectives from 4x to 100x magnification used for polarized light and brightfield microscopy.

Transmitted Light Illumination

Köhler illumination: adjustable field diaphragm; centered and height-adjustable Abbe condenser with adjustable aperture diaphragm and rotatable auxiliary lens. NA = 1.25. The polarizer can rotate from 0 to 360°, with rotation angles of 0°, 90°, 180°, and 270° marked on the scale. The analyzer rotates 90°, and the analyzer's Vernier scale provides an accurate angle measurement.

Köhler Illumination

Köhler illumination improves the quality of the image obtained from a sample. With such illumination, you can achieve maximum resolution for each objective lens and uniform illumination of the field of view, without dark areas at the edges. The examined sample will be in sharp focus, and the image will be free of artifacts.

Study of Samples with Polarized Light

The intermediate tube contains the analyzer and Bertrand lens and has a slot for installing compensators. The analyzer is inserted into the light path to observe objects with polarized light. When the polarizer and analyzer rotate, the polarization angle changes. You can place the two filters perpendicular to each other by setting both to the "0" position. When the microscope body is rotated, depending on the polarization angle, the sample surface reflects light differently. The Bertrand lens is used for conoscopic studies. Compensators are designed to improve the contrast of samples that have weak birefringence.

Accessories

A range of accessories is specifically designed for this microscope.

Additional objectives can be used to study samples up to 0.22 µm.

Additional eyepieces can be used to extend the microscope's magnification range. These additional eyepieces will help you make the most of the objective lens you use most frequently.

Other accessories include a digital camera to send the image obtained by the microscope to a monitor and store files, and which has software for real-time sample measurements. You can use a calibration slide to measure observed samples and use it in combination with an eyepiece provided with a measuring scale or with the camera software.