Comprehensive Information on ZYGO 4-inch Laser Interferometer: 

 I. Product Models and Functions ?GPI-XP/D Series? Measurement beam diameter of 4 inches (102mm), utilizing a 632.8nm helium-neon laser, supports curvature radius, surface shape, and transmitted wavefront measurements for flat, spherical, and cylindrical components?. Repeatability accuracy up to λ/10000 (RMS), CCD resolution of 640×480 pixels, expandable to 1024×1024? . Standard lens accuracy: flat lens λ/20, spherical lens λ/10 (F-number coverage from F/0.65 to F/7.1)? . ?Verifire MST? Supports multi-parallel surface measurement (3-4 surfaces), separates interference fringes through wavelength modulation technology, suitable for inspection of uncoated parallel plates? .

 II. Includes software, lenses, and mounting brackets. High-stability laser source (0.1 nanometer frequency stability). 

III. Technical Parameters ?Light Source?: 632.8nm helium-neon laser, coherence length >100 meters? 3 . ?Resolution?: λ/8000 (approximately 0.0791 nanometers), supports 3180 fringe analysis? . ?Measurement Range?: Maximum sample size 254×203×203mm? .

 IV. Application Scenarios Primarily used for surface shape inspection of optical components (such as lenses, mirrors), suitable for precision manufacturing, aerospace, and other fields?