The Argunov Cassegrain telescope is a catadioptric telescope design first introduced in 1972 by P. P. Argunov. All optics are spherical, and the classical Cassegrain secondary mirror is replaced by a sub-aperture secondary corrector group consisting of three air-spaced elements, two lenses and a Mangin mirror (the element farthest from the primary mirror). Argunov systems only employ spherical surfaces and avoid the practical difficulties of making and testing aspheres. However, this seeming benefit is marginal, as it is almost as difficult to make a true, zone-free sphere of precise radius of curvature as it is to make an asphere of equivalent precision. Also since multiple surfaces are involved, creating a design with good aberration correction can be very complex.

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  • The Argunov Cassegrain telescope is a catadioptric telescope design first introduced in 1972 by P. P. Argunov. All optics are spherical, and the classical Cassegrain secondary mirror is replaced by a sub-aperture secondary corrector group consisting of three air-spaced elements, two lenses and a Mangin mirror (the element farthest from the primary mirror). Argunov systems only employ spherical surfaces and avoid the practical difficulties of making and testing aspheres. However, this seeming benefit is marginal, as it is almost as difficult to make a true, zone-free sphere of precise radius of curvature as it is to make an asphere of equivalent precision. Also since multiple surfaces are involved, creating a design with good aberration correction can be very complex. (en)
  • 阿古諾夫-卡塞格林望遠鏡的設計是在1972年由P.P. 阿古諾夫首度介紹給世人的。他所有的光學元件都是球面鏡,並將傳統卡塞格林式的次鏡換成三個有空氣隙的透鏡元件。距離主鏡最遠的透鏡是曼京鏡,它的作用如同第二個鏡子的表面,在對向天空的一面有反射用的塗層。阿古諾夫的系統只使用球狀的表面,避免了非球面的製造和測試。然而,獲得的好處似乎很少,因為這套系統實際上非常難以製做,它需要精確的自由區域球的曲率半徑以取代等效的非球面鏡。 (zh)
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http://purl.org/linguistics/gold/hypernym
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  • The Argunov Cassegrain telescope is a catadioptric telescope design first introduced in 1972 by P. P. Argunov. All optics are spherical, and the classical Cassegrain secondary mirror is replaced by a sub-aperture secondary corrector group consisting of three air-spaced elements, two lenses and a Mangin mirror (the element farthest from the primary mirror). Argunov systems only employ spherical surfaces and avoid the practical difficulties of making and testing aspheres. However, this seeming benefit is marginal, as it is almost as difficult to make a true, zone-free sphere of precise radius of curvature as it is to make an asphere of equivalent precision. Also since multiple surfaces are involved, creating a design with good aberration correction can be very complex. (en)
  • 阿古諾夫-卡塞格林望遠鏡的設計是在1972年由P.P. 阿古諾夫首度介紹給世人的。他所有的光學元件都是球面鏡,並將傳統卡塞格林式的次鏡換成三個有空氣隙的透鏡元件。距離主鏡最遠的透鏡是曼京鏡,它的作用如同第二個鏡子的表面,在對向天空的一面有反射用的塗層。阿古諾夫的系統只使用球狀的表面,避免了非球面的製造和測試。然而,獲得的好處似乎很少,因為這套系統實際上非常難以製做,它需要精確的自由區域球的曲率半徑以取代等效的非球面鏡。 (zh)
rdfs:label
  • Argunov–Cassegrain telescope (en)
  • 阿古諾夫-卡塞格林望遠鏡 (zh)
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