논문 해외 국제전문학술지(SCI급) DEVELOPMENT OF LIGHT WEIGHTED OPTICAL TELESCOPE KIT USING ALUMINUM PROFILE AND ISOGRID STRUCTURE
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2022-02
- 저자명 김건희
- 학술지명 JOURNAL OF THE KOREAN ASTRONOMICAL SOCIETY
- 발행처명 KOREAN ASTRONOMICAL SOCIETY
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 13
홈페이지논문 초록 (Abstract)
We introduce the Transformable Reflective Telescope (TRT) kit that applies an aluminum profile as a base plate for precise, stable, and lightweight optical system. It has been utilized for optical surface measurements, developing alignment and baffle systems, observing celestial objects, and various educational purposes through Research & Education projects. We upgraded the TRT kit using the aluminum profile and truss and isogrid structures for a high-end optical test device that can be used for prototyping of precision telescopes or satellite optical systems. Thanks to the substantial aluminum profile and lightweight design, mechanical deformation by self-weight is reduced to maximum 67.5 mu m, which is an acceptable misalignment error compared to its tolerance limits. From the analysis results of non-linear vibration simulations, we have verified that the kit survives in harsh vibration environments. The primary mirror and secondary mirror modules are precisely aligned within 50 mu m positioning error using the high accuracy surface finished aluminum profile and optomechanical parts. The cross laser module helps to align the secondary mirror to fine-tune the optical system. The TRT kit with the precision aluminum mirror guarantees high quality optical performance of 5.53 mu m Full Width at Half Maximum (FWHM) at the field center.