Heliograph        
  m.    
(m) -en -en ①(拍摄照片)照②回射仪;Heliometer (n) []日仪,测日仪;Helioskop (n) []望远镜;Heliotherapie (f) 日疗,

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[der] 照制版。摄影。日仪。摄影拍摄。日仪传递。

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[der] 照制版。摄影。日仪。摄影拍摄。日仪传递。
heliograph, device for photographing the Sun;
instrument which measures the intensity of sunlight;
signaling device which reflects the sun's rays by means of a movable mirror;
early type of photoengraving