Abstract
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.
Original language | English (US) |
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Pages (from-to) | 841-850 |
Number of pages | 10 |
Journal | Journal of Low Temperature Physics |
Volume | 193 |
Issue number | 5-6 |
DOIs | |
State | Published - Dec 1 2018 |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- General Materials Science
- Condensed Matter Physics
Keywords
- Cosmic microwave background radiation
- Inflation
- Satellite
- Telescope