Design method and clinical application of a high precision spectrophotometer system is introduced.The system fully uses advantage of dispersive device which based on holographic concave grating

combined with freely programmable CPLD stepper motor sub-circuit technology and closed-loop motor positioning control technology to realize the high precision spectral of 1 nm in the range of 320 -800 nm continuous spectrum.Clinical application of biochemical analyzer which based on the system as the core sensing component shows that the system has advantages

such as continuous spectrum distribution scope

high spectral precision

stable operation

reliable detection and so on.