Microscopy

olympus U-PJ polarizer orientation plate SWHK eyepiece crosshair micrometer graticule alignment 1

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olympus U-PJ polarizer orientation plate SWHK eyepiece crosshair micrometer graticule alignment 1

olympus microscopy microscope petrographic polarizing microscope orientation plate upj eyepiece swhk crosshair graticule reticle micrometer ocular circle crystal

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