Design of double-reflector objective for corneal sensing in the 220-330 GHz band

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference contributionScientificvertaisarvioitu

Abstrakti

An all reflective, Schwarzschild objective design for corneal reflectometry is evaluated in the WR3.4 (220-330 GHz) frequency band. The shadow created by the 60-mm diameter secondary mirror is sufficiently large to mount a standard, OCT system to enable concomitant data acquisition with both modalities while avoiding beam obscuration. The system was fed with a bottle beam comprised of a p= 0, ell = 4 Laguerre-Gaussian mode with a 12.5-mm beam waist radius for increased throughput. The 50-mm focal length system was determined with ray tracing and simulated with an in-house physical optics code using a PEC sphere as a test target. The power coupling coefficient between the feed beam and scattered beam varied from 0.35 at 220 GHz to 0.48 at 330 GHz. While the system demonstrated a clear phase center at less than 1 λ from the geometric focal point, significant edge diffraction prevents the formation of a spherical phasefront, which is needed to achieve phase front matching.

AlkuperäiskieliEnglanti
Otsikko2022 16th European Conference on Antennas and Propagation, EuCAP 2022
KustantajaIEEE
ISBN (elektroninen)9788831299046
DOI - pysyväislinkit
TilaJulkaistu - 2022
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaEuropean Conference on Antennas and Propagation - Madrid, Espanja
Kesto: 27 maalisk. 20221 huhtik. 2022
Konferenssinumero: 16

Julkaisusarja

NimiProceedings of the European Conference on Antennas and Propagation
ISSN (painettu)2164-3342

Conference

ConferenceEuropean Conference on Antennas and Propagation
LyhennettäEuCAP
Maa/AlueEspanja
KaupunkiMadrid
Ajanjakso27/03/202201/04/2022

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