• 한국정밀공학회지
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• 제14권11호
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• pp.42-49
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• 1997

The extent of absorption and transmitance of the light that passes through some material is changed as the wavelength of the light varies, and which makdes 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 arease 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 struicture. It is achieved to derive basic principles to manipu- late precision sine drive mechanism : it should be aligned with a condition that .beta. , the angle between grat- ing normal and grating rod should be the same as .gamma. , 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 guaranteeing the linearity of sine drive mechanism. Performance evaluation is achieved by a standard sample 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 performanes.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 춘계학술대회 논문집
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• pp.357-360
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• 2002

Nowadays, the improvement and development of Multi-media, information and communication technology are rapidly processed. And many products, for example, digital camera, digital camcorder, and PDA, are used for them. They need large data storage capacity and small size, light storage system. Due to that, many studies and researches in data storage system have been carried out. Especially, micro drive system was presented by IBM.(1) However, its system is expensive and uneasy to be portable. In ODD technologies, 1 inch drive system is not yet or in processing status.(2) If to be possible and to be come up, it is cheap than HDD system and easy to transfer information. In this paper, a miniaturized actuator(about linch) is designed and tested for ODD system. Specially, it is adapted for NFR(Near-field Recoding) system using SIL(Solid Immersion Lens). It is the dual-servo actuator which consists of a coarse actuator and fine actuator. Its actuating force generation method is VCM(Voice Ceil Motor). The fine actuator has 4-wire suspensions and bobbin wrapped by coil and includes focusing motion as well as tracking motion. The coarse actuator has an actuating coil and V-grooved guide mechanism. Also, the characteristics of the designed actuator is estimated by sine-swept mode and LDV(Laser Doppler Vibro-meter).