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홍영주(Y. J. Hong),곽윤근(Y. K. Kwak),김수현(S. H. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Stray light is the light except the light of the analytic wavelength and the source of measurement error of absorbance. Some experimental results showed that diffractive grating is the major factor of stray light in spectrophotometer. Through the ray tracing with the software tool, classified the paths of the diffractive light from grating and found the range of wavelength which reach the exit slit. The quantity of the stray light(0.025%) is more than the minimum limit of stray light(0.01%) of the single monochromator. A novel optical layout design method, which prevent the reflected rays entering the diffractive grating is proposed.