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CFI Glass
Nikon̵7;s Chrome-Free Infinity glass is available to work in microscopes that have 200-millimeter tube lengths with objectives that have a 25-millimeter thread size. A CFI glass provides a parfocal distance of 60 millimeters, and provides the most combinations of different magnification settings with large apertures. Using a glass with a parfocal distance of 60 millimeters reduces the amount of refocusing you have to do when you change magnification.
Optical Correction
Optical microscopes, or microscopes that use light, can suffer from lens errors which can degrade the image quality when you magnify a specimen. The ̶0;chrome̶1; in Chrome-Free Infinity refers to the Greek word for color (chroma) and not chrome metal. A Nikon microscope using CFI glass is designed to reduce chromatic aberrations.
Microscope Objective Housing
Nikon engraves a variety of details on the objective housing of its microscopes, so researchers can quickly see what kind of equipment they are using. At the top of the housing, the manufacturer̵7;s name appears, followed by the aberration correction type, such as CFI. Next, Nikon engraves the lateral magnification and the numerical aperture, details about specialized optical properties of the glass, the tube length and working distance. You̵7;ll also see the cover glass thickness range, so you̵7;ll know what kind of slide cover will work with the microscope.
Nikon Microscopes
Nikon makes a variety of optical microscopes using CFI glass for use in different settings. For example, the company manufactures microscopes for biologists, as well as researchers who are doing work in clinics and laboratories. Nikon also makes optical microscopes for students to use in classrooms at the high school and university level. Its industrial microscopes are also available with CFI glass, for companies with employees who need to examine microcircuits, fibers and other materials.