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主題: tubeless catadioptric telescope 無外框的蓋賽格林 作者: peter 於 2017-03-06 18:00:57 16-inch tubeless catadioptric telescope by Don Dilworth, 1976
http://rus.telescopes.ru/articles/article2.phtml (http://rus.telescopes.ru/articles/images/rithey-chretien.jpg) === 沒鏡筒 看 Aerial telescope 航空望遠鏡 http://familystar.org.tw/index.php?option=com_smf&Itemid=45&topic=27811.0 主題: 回覆： tubeless catadioptric telescope 作者: peter 於 2017-03-06 18:03:30 http://www.alpineastro.com/LAZZAROTTI/Lazzarotti_Home.htm
(http://www.alpineastro.com/COMEC/Images/GM2000_Gladius_Med.jpg) (http://www.alpineastro.com/common%20images/gladio2_pic1_sm.jpg) (http://www.alpineastro.com/common%20images/gladio2_pic4_med.jpg) 如果直接使用透明玻璃 不是可以 ? 還是說那一圈黑色 沒影響多少 不過 沒外面得好處是熱平衡快嗎 ? => SCT 前面那是修正鏡不是一般玻璃 蓋賽格林是沒前面 http://www.skyandtelescope.com/astronomy-equipment/super-planetary-telescope/ (http://www.skyandtelescope.com/wp-content/uploads/NPS_gladio1.jpg) |