Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Guohao Ju"'
Publikováno v:
IEEE Photonics Journal, Vol 15, Iss 1, Pp 1-5 (2023)
In optical systems, pupil alignment is an important component of wavefront sensing, closed-loop feedback, and imaging vignetting control because it directly affects the detection limit of the system and thus the realization of scientific goals. This
Externí odkaz:
https://doaj.org/article/dfd300e5706b4897a63d3c4ff1da0855
Publikováno v:
Sensors, Vol 23, Iss 10, p 4705 (2023)
Ellipticity performance of space telescopes is important for exploration of dark matter. However, traditional on-orbit active optical alignment of space telescopes often takes “minimum wavefront error across the field of view” as the correction g
Externí odkaz:
https://doaj.org/article/6d49d1b39c9942318ecc1eac8703987e
Publikováno v:
Sensors, Vol 23, Iss 10, p 4966 (2023)
The presence of manufacture error in large mirrors introduces high-order aberrations, which can severely influence the intensity distribution of point spread function. Therefore, high-resolution phase diversity wavefront sensing is usually needed. Ho
Externí odkaz:
https://doaj.org/article/5bcf2a0cb3b1489cb578561a641b90ac
Publikováno v:
Remote Sensing, Vol 14, Iss 18, p 4681 (2022)
A segmented primary mirror is very important for extra-large astronomical telescopes, in order to detect the phase error between segmented mirrors. Traditional iterative algorithms are hard to detect co−phasing aberrations in real time due to the l
Externí odkaz:
https://doaj.org/article/960f1670acb544e5b8fe68feee58bd72
Publikováno v:
Sensors, Vol 22, Iss 15, p 5584 (2022)
Phase retrieval wavefront sensing methods are now of importance for imaging quality maintenance of space telescopes. However, their accuracy is susceptible to line-of-sight jitter due to the micro-vibration of the platform, which changes the intensit
Externí odkaz:
https://doaj.org/article/4beb0f3a9abf4cebb255e64d4c65444f
Publikováno v:
Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022).
Autor:
Zhirong Lu, Guohao Ju, Xiaoquan Bai, Chunyue Zhang, Fengyi Jiang, Boqian Xu, Jihong Dong, Shuyan Xu
Publikováno v:
Optics Express. 31:13981
A segmented primary mirror (PM) is an efficient solution to the problems of a monolithic PM manufacture, testing, transportation, and launch. However, the problem of the radius of curvature (ROC) matching among PM segments will arise, which if not so
Publikováno v:
Optics express. 30(9)
A channeled spectropolarimeter can simultaneously obtain intensity, spectral, and polarization information. In the traditional model, the retarders must be oriented at specific angles. However, misalignments of the retarders are inevitable during ass
Publikováno v:
Optics express. 29(18)
Parameters mismatching between the real optical system and phase retrieval model undermines wavefront reconstruction accuracy. The three-dimensional intensity position is corrected in phase retrieval, which is traditionally separated from lateral pos
Autor:
Zhang Chunyue, Shuyan Xu, An Qichang, Yirui Wang, Shuaihui Wang, Fengyi Jiang, Boqian Xu, Guohao Ju
Publikováno v:
Optics express. 29(16)
Segmented primary mirror provides many crucial important advantages for the construction of extra-large space telescopes. The imaging quality of this class of telescope is susceptible to phasing error between primary mirror segments. Deep learning ha