YS4580 spectrophotometer uses 45/0 (45 degree ring illumination, 0 degree reception) geometric optical structure in accordance with CIE No. 15 and adopts concave grating spectrometry to accurately measure sample reflectance and various colorimetric data; Equipped with a large measuring aperture of Φ20 mm for traffic signs, color matching, precise color transfer;Built-in GB2893, GB/T18833 standard color, can be manually customized polygonal rectangle tolerance, one button to realize the measurement of traffic road signs, marking lines, reflective film brightness factor and chromaticity coordinates. For uneven sample with stripes or granular samples, the instrument has high accuracy and high stability. PRODUCT FEATURES 1. Beautiful appearance and perfect combination with ergonomic structure design; 2.45/0 geometric optical structure, in accordance with CIE No.15, GB/T 3978, GB 2893, GB/T 18833, ISO7724/1, ASTM E1164, DIN5033 Teil7, GB 2893, GB/T 18833; 3. Adopt high-life and low-power combined LED light source, including UV/excluding UV; 4.Φ20mm aperture adapt to larger samples or uneven samples; 5. Measure sample spectra, accurate Lab data , can be used in color matching and accurate color transmission; 6. High electronic hardware configuration: 3.5-inch TFT true color screen, capacitive touch screen, concave grating, 256-pixel dual-array CMOS detector, etc.; 7.USB/Bluetooth 4.0 (compatible with 2.1) dual communication mode, more adaptable; 8.Super stain-resistant and stable standard white calibration plate; 9. Large-capacity storage space, can store more than 30,000 test data; 10. Two standard observers, multiple light source modes, multiple color systems, and a variety of standard colorimetric indicators to meet the needs of various customers for color measurement; 11. PC software has powerful function extensions; 12.Built-in standard polygon tolerance setting and specific traffic sign gamut, especially suitable for traffic signage brightness factor