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

Mariangela Baggio*, Aleksi Tamminen, Juha Ala-Laurinaho, Zachary Taylor

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

1 Sitaatiot (Scopus)
44 Lataukset (Pure)


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.

Otsikko2022 16th European Conference on Antennas and Propagation, EuCAP 2022
ISBN (elektroninen)978-88-31299-04-6
ISBN (painettu)978-1-6654-1604-7
DOI - pysyväislinkit
TilaJulkaistu - 2022
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaEuropean Conference on Antennas and Propagation - Madrid, Espanja
Kesto: 27 maalisk. 20221 huhtik. 2022
Konferenssinumero: 16


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


ConferenceEuropean Conference on Antennas and Propagation


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