Concept Study of Optical Configurations for High-Frequency Telescope for LiteBIRD
- 147 Downloads
The high-frequency telescope for LiteBIRD is designed with refractive and reflective optics. In order to improve sensitivity, this paper suggests the new optical configurations of the HFT which have approximately 7 times larger focal planes than that of the original design. The sensitivities of both the designs are compared, and the requirement of anti-reflection (AR) coating on the lens for the refractive option is derived. We also present the simulation result of a sub-wavelength AR structure on both surfaces of silicon, which shows a band-averaged reflection of 1.1–3.2% at 101–448 GHz.
KeywordsCosmic microwave background radiation Inflation Satellite Telescope
This work was supported by JSPS/MEXT KAKENHI Grant Numbers 17H01115 and 15H05891.
- 1.M. Hazumi et al., Proceedings of SPIE 8442 (2012). https://doi.org/10.1117/12.926743
- 2.H. Ishino et al., Proceedings of SPIE 9904 (2016). https://doi.org/10.1117/12.2231995
- 3.H. Sugai et al., Proceedings of SPIE 9904 (2016). https://doi.org/10.1117/12.2232008
- 5.A.S. Rahlin et al., Proceedings of SPIE 9153 (2014). https://doi.org/10.1117/12.2055683
- 7.J. Bock et al., arXiv:0805.4207
- 10.S. Kashima et al., (in preparation)Google Scholar
- 13.A. Suzuki, Ph.D. dissertation (University of California, Berkeley, 2013)Google Scholar
- 16.K. Arnold, Ph.D. dissertation (University of California, Berkeley, 2010)Google Scholar
- 18.D.M. Pozar, Microwave Engineering (John Wiley & Sons Inc, 1998)Google Scholar
- 23.A. Kok et al., IEEE NSS/MIC Conference Record (2009). https://doi.org/10.1109/NSSMIC.2009.5402256
- 24.Y. Tang et al., IEEE MEMS (2017). https://doi.org/10.1109/MEMSYS.2017.7863504