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n.高度消色透镜
1、April of 1972 was the first triplet apochromat Takahashi telescope built.───4月高桥第一款三片式复消色差 (A P O)望远镜TS80问世。
1、In 1977 Takahashi introduced their second triplet fluorite apochromat the TS-90 a 90mm x 1000mm and the 90S mount and the famous JP mount in 1979.
2、The TS80 built in April of 1972 was the first triplet apochromat Takahashi telescope built.
3、Apochromat ic lens: Compound lens corrected for chromatic aberration, i. e. the three primary colours, red, green and blue are corrected. Also called Apochromat .