Nikon P-CQ Quartz Wedge Compensator, 6 Orders

The Nikon P-CQ Quartz Wedge Compensator (6 Orders) is a precision polarized light accessory designed for quantitative retardation measurements in polarizing microscopy. Inserted directly into the nosepiece slot, it enables accurate birefringence analysis across a wide retardation range — an essential tool for mineralogy, materials science, and biological fiber research. The quartz wedge design provides a graduated retardation gradient across its length, enabling direct visual identification of interference colors and their corresponding retardation values using the Michel-Lévy color chart. Its precision construction ensures repeatable, accurate results in both research and quality control environments.