System composition:
High precision rotary encoder;
Digital Angle Display with RS232 Interface;
Reflective collimator with high resolution CCD (precision in-10, diameter 50mm, focal length 300mm);
Photoelectric autocollimator, resolution 0.01 seconds, repeatability +/-0.2 seconds;
PbS detector and UV detector are installed on mirror telescope, and the detector is selected by mirror;
A lamp chamber with five spectral line lamps and filters (wavelengths: 2325.4 nm, 1970.1 nm, 1529.6 nm,
1013.9 nm, 852.1 nm, 766.5 nm, 706.5 nm, 643.8 nm, 632.8 nm, 589.3 nm, 587.5 nm,
546.1 nm, 479.9 nm, 435.8 nm, 404.6 nm, 365.1 nm, 326.1 nm, 313.0 nm and 253.7 nm);
Ultra-high precision pneumatic bearing with radial and axial accuracy better than 0.05 μ m;
The airflow control device comprises an air cleaner, a pressure controller and an interface connected with a compressed air pump or other air sources;
0 two-axis adjustable tilt table and micron-level rotation adjustment;
Optical fiber illumination source;
32-bit image capture card, software (Windows/NT) includes features for prism, wedge, and tilt measurements.
Measurement principle:
The refractive index of optical material is determined by measuring the refractive angle of prism. The reflector collimator is installed on the pneumatic bearing, and the refraction is found by using the inclined rotating table and the principle of small refraction
Corner. Then calculate the refractive index