© 2021 ã. Z. Zhang, W. Zheng, D. Gong, H. Li
Ïðåäñòàâëåíà ñõåìà äèñêðåòíîãî ïåðåêëþ÷åíèÿ ëèíçîâîé êîìïîíåíòû çåðêàëüíî-ëèíçîâîãî êðóïíîàïåðòóðíîãî äëèííîôîêóñíîãî îáúåêòèâà ñ øèðîêèì ïîëåì çðåíèÿ. Ïðåäëàãàåìàÿ îïòè÷åñêàÿ ñèñòåìà âêëþ÷àåò òåëåñêîï ïî ñõåìå Íüþòîíà, ñîäåðæàùèé êîëëèìàòîðíóþ è ëèíçîâóþ ãðóïïû ñ ïåðåêëþ÷àåìûì ôîêóñíûì ðàññòîÿíèåì. Âûñîêîå êà÷åñòâî èçîáðàæåíèÿ êàê â äëèííîôîêóñíîì, òàê è â êîðîòêîôîêóñíîì ðåæèìàõ ïðè èçìåíåíèè óñëîâèé ðàáîòû è òåìïåðàòóðû îáåñïå÷èâàåòñÿ ïåðåìåùåíèåì êîëëèìàòîðíîé ãðóïïû. Çíà÷åíèÿ ôóíêöèè ïåðåäà÷è ìîäóëÿöèè ïðåâîñõîäÿò 0,5 íà ÷àñòîòå Íàéêâèñòà, 80% ýíåðãèè êîíöåíòðèðóåòñÿ â êðóæêå äèàìåòðîì 0,025 ìì (ìåíåå, ÷åì äâà ïèêñåëà), â ïîëå çðåíèÿ ìàêñèìàëüíàÿ äèñòîðñèÿ ñîñòàâëÿåò 0,962% êàê â äëèííîôîêóñíîì, òàê è â êîðîòêîôîêóñíîì ðåæèìàõ. Ïðåäñòàâëåííàÿ ñèñòåìà ñ ïåðåêëþ÷àåìûì ôîêóñíûì ðàññòîÿíèåì îáåñïå÷èâàåò âûñîêîå êà÷åñòâî èçîáðàæåíèÿ ïðè âñåõ çíà÷åíèÿõ ôîêóñíîãî ðàññòîÿíèÿ, ïðîñòà ïî êîíñòðóêöèè è óñòîé÷èâà â ðàáîòå.
Êëþ÷åâûå ñëîâà: îïòè÷åñêàÿ êîíñòðóêöèÿ, ñèñòåìà ïåðåìåííîãî ôîêóñà, îïòîýëåêòðîííûé òåëåñêîï
Design of a zoom telescope optical system with large aperture, long focal length, and wide field of view via a catadioptric switching solution
© 2021 Zhenduo Zhang*, PhD (Physics); Wenbo Zheng*, graduate student (Physics); Dun Gong**, PhD (Physics); Hongzhuang Li**, PhD (Physics)
* Navigation College, Dalian Maritime University, Dalian, China
** Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
E-mail: gongdun@sina.com
ÓÄÊ 535, 617.7, 628.9
Ïîñòóïèëà â ðåäàêöèþ 06.07.2020
DOI:10.17586/1023-5086-2021-88-01-22-31
This study presents a catadioptric switching solution for a zoom telescope optical system to achieve a large aperture, long focal length, and wide field of view. The proposed optical system combines a Newton-type main system with a collimator group and a switching zoom group. Further, clear imaging of long and short focal lengths under different operating ranges and temperatures is realized using a moving collimator group. For the field of view at both long and short focal lengths, the modulation transfer function exceeds 0.5 at the Nyquist frequency, 80% of the energy is concentrated in a diameter of 0.025 mm (i.e., less than two pixels), and the maximal distortion is 0.962%. The presented switching-zoom system exhibits high imaging quality for each focal length as well as a simple structure and stable performance.
Keywords: optical design, zoom system, optoelectronic telescope.
OCIS codes: 110.2970, 280.4788, 350.4600
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