*Flat crystalIt is based on the principle of light wave interference and utilizesFlat crystalThe interference fringes that appear between the measuring surface and the measured surface of the specimen are used to measure the flatness of the measured surface.
*Flat crystalUsed to verify the compatibility and flatness of measuring blocks, as well as the flatness of measuring and working surfaces of instruments and measuring tools. It can also be used to calibrate high-precision planar parts, such as planar optical parts, platforms, plates, guides, seals, etc. planeFlat crystalEspecially suitable for measuring units, laboratories as standard planes and templates.

planeFlat crystalTechnical parameters

Plane diameter d (mm)	Basic parameters
	Level 1		Level 2
	Within the range of d	Within the range of 2/3D	Within the range of d	Within the range of 2/3D
30 45 60	0.03	----	0.1	0.05
80 100 150	0.05	0.03
200 250 300	0.08 0.1 0.15	0.05 0.05 0.09	0.12 0.15 0.2	0.06 0.08 0.1