Фазово-контрастные устройства

Phase contrast device KF-4

The phase-contrast device KF-4 is intended for studying low-contrast objects that differ from their surrounding environment in refractive index or thickness, and are not visible in a microscope when observed in transmitted light in a bright field. Lens magnification 10, 20,90. Manba: https://www.nv-lab.ru/catalog_info.php?ID=207