2024-03-28T12:01:48Z
https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00032725
2022-04-27T08:59:34Z
117:1698
117:2972
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Condition of Optical Systems Independent of Frequency for Wide Field-of-View Radio Telescopes
今田, 大皓
永井, 誠
中井, 直正
Imada, H.
Nagai, M.
Kino, M.
Seta, M.
Ishii, S.
Nakai, N.
© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
In this paper, we present a condition of optical systems to form images independent of frequency. The condition independent of frequency in case of a single Gaussian beam on an optical axis has been known, but that in case of a beam propagated off the axis or tilted beam, which appears in a wide field-of-view (FOV) telescope, has not been known. We first show relations between an arbitrary electric field on an object plane and an induced one on an image plane after passing through a lens with calculating Fresnel diffraction integrals. If the lens formula is met, there is a one-to-one correspondence between points on the object and image plane. This result enables to use geometrical optical methods. The condition and relations derived here are confirmed by simulations. We also applied them to a wide-FOV telescope.
Institute of Electrical and Electronics Engineers
2015-01
eng
journal article
http://hdl.handle.net/2241/00123594
https://tsukuba.repo.nii.ac.jp/records/32725
10.1109/TTHZ.2014.2365680
2156-342X
AA12541535
IEEE transactions on terahertz science and technology
5
1
57
63
https://tsukuba.repo.nii.ac.jp/record/32725/files/IEEETST_5-1.pdf
application/pdf
2.6 MB
2015-03-04