단색 분광기 회절 격자의 정밀 구동 기구에 관한 연구

Abstract

The extent of absorption and transmittance of the light that passes through some material is changed as the wavelength of the light varies, and which makes it possible to estimate characteristics of the material. Spectrometer is a measurement system that can analyze the characteristics of material by using this principle. Its application field is so wide that it can be applied to all the areas that are concerned with analyzing materials; biological, environmental, medical and chemical area etc. This study is focused on developing precision sine drive mechanism for grating monochromator which is the most important part of the spectrometers. It is designed to be simple in structure. It is achived to derive basic principles to manipulate precision sine drive mechanism: it should be aligned with a condition that β, the angle between grating normal and grating rod should be the same as γ, the one between moving nut``s normal and sliding guide. And also, it``s found that the mis-alignments of the grating and mirrors are not the main factor in ple by comparing experimental results with standard values. It results in wavelength accuracy of ±0.5nm and resolution of 1nm. Conclusively, it can be verified that the sine drive mechanism developed in this study is not only simple in structure, but also stable and excellent in performances.