Autor: Zhang, P.-H. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Research on a square Cassegrain-type solar concentrating reflector with a double pyramid
Autorzy:: Zhang, Y.
Yang, H.
Jiang, P.
Mao, S.
Yu, M.
Powiązania:: https://bibliotekanauki.pl/articles/174264.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: concentrating reflector
double pyramidal
ray tracing
Opis:: A structure of a solar concentrating reflector is designed in this paper to improve the usage of solar energy. For the dark image which is the result of the secondary mirror in the new type of the Cassegrain solar concentrating system, a double pyramid system is used to improve this phenomenon. By eliminating the dark image, the system enhanced the concentration ratio and the working efficiency. Meanwhile, both the primary and secondary mirrors are shaped into a square section in order to get a better match with a square photovoltaic receiver. While the length of the primary mirror is 89m and the block ratio is 20%, the concentration ratio is equal to 118.86.
Źródło:: Optica Applicata; 2016, 46, 3; 461-471
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Optical image encryption by using diffractive imaging with special constraint in the input plane
Autorzy:: Wang, Z.
Wang, H.
Yang, X.
Zhang, P.
Hou, C.
Qin, Y.
Powiązania:: https://bibliotekanauki.pl/articles/173781.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: optical encryption
diffractive imaging
bilinear interpolation
Opis:: In order to simplify the optical setup and the encryption process, a diffractive-imaging-based optical encryption system using a single diffraction pattern is proposed. A predesigned binary mask is placed before the plaintext in the encryption process, and three randomly distributed phase only masks are placed in the optical path. Only one diffraction pattern needs to be recorded as ciphertext by CCD. In the decryption process, an iterative phase retrieval algorithm is applied, in which the predesigned binary mask acts as a support constraint in the input plane. After the iterative process, an interpolation operation for the zero-valued pixels is also implemented. The effectiveness and robustness of the proposal are demonstrated by numerical simulation results.
Źródło:: Optica Applicata; 2016, 46, 1; 57-69
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

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