Laboratory polarizing microscope MIN-8. This is a more advanced device designed to study transparent preparations in transmitted light during orthoscopic and conoscopic rays. The microscope MIN-8 has a rigid tripod with a built-in illuminator, a rotating stage with vernes to count the angle of rotation. Mechanism for focusing the centering of the Bertrand lens. The polarizer, analyzer and stage have limbs for reading the angles of rotation. The microscope kit includes six lenses (planakhromata – 3,5 x 0,1, 9×0,20 and achromates – 20×0,40, 40 x 0,65, 60 x 0,85, 90 x 1,25) and three eyepieces (5 X – with a grid and a scale, 8 x with a crosshair, 15 x). When combined with an OI-12 illuminator, a microscope can be used to study opaque objects in reflected light. The use of a polarizing microscope broadens the possibilities of studying medicinal plants and allows increasing the amount of information obtained. Double refraction has crystals of calcium oxalate. Which greatly facilitates their detection in preparations, especially in powder. Optically anisotropic starch grains, in which polar light is visible in polarized light, since the starch molecules in the grain are located radially. The cell membrane is also optically anisotropic, which is due to a certain orientation of the molecular chains of cellulose. Especially the large value of birefringence is possessed by the cellular membranes of considerable thickness (mechanical elements that conduct the xylem elements). When examining preparations in a polarizing microscope with a crossed polarizer and analyzer, the anisotropic elements are clearly visible on the dark background of the field of view. In the absence of a polarizing microscope, one can use a conventional biological microscope, using polaroids (polarization filters). One of them (a polarizer) is placed on the ring under the condenser, the other (analyzer) is placed on the eyepiece. Rotation of the eyepiece with a polarizing filter superimposed on it achieve “damping” of light in the field of view. In a darkened field, brightly lit details with birefringence. Lupu is more often used for macroscopic analysis of medicinal plant material, when it is necessary to determine the presence and nature of pubescence. The presence of essential oil glands, etc. As well as in the study of small objects – seeds, flowers, umbellate fruits, etc. The lens consists of one simple or complex positive (magnifying) lens. The subject should be in the front focal plane or slightly closer. I SELL AND YOU RECEIVE ONLY THAT THAT IS REPRESENTED SEE ON ORIGINAL PHOTOS. I DO NOT UNDERSTAND AS FAR AS IT IS COMPLETED. I guarantee very good packaging. I send parcels within 24 hours. No responsibility or liability for any errors turn! The description is always to the best of my knowledge and belief. These are original paintings. The item “Vintage Laboratory polarizing microscope LOMO MIN-8 ussr” is in sale since Sunday, April 09, 2017. This item is in the category “Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Microscope Parts & Accessories”. The seller is “bambelok13″ and is located in baranovichi,. This item can be shipped worldwide.
- Brand: LOMO
- Model: MIN-8
- Country/Region of Manufacture: Russian Federation
- MPN: Does Not Apply
Posted in vintage | 
Comments Off | November 8th, 2019
