Markowitz camera

Japanese: マルコビッチカメラ(英語表記)Markowitz camera
Markowitz camera
Also known as a lunar position camera. A device that simultaneously photographs the moon and stars and measures the position of the moon relative to the surrounding stars. It was invented in the 1950s by William Markowitz of the U.S. Naval Observatory. It features a parallel, flat, circular filter in the center that reduces the light of the bright moon, and rotates to compensate for the motion of the moon. It was used in countries around the world during the International Geophysical Year, but its accuracy was insufficient and it has not been used since. [Tomita Koichiro]

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
月位置カメラともいう。月と恒星を同時に写真撮影し,まわりの恒星と相対的に月の位置を測定する装置。アメリカ海軍天文台のマルコビッチWilliam Markowitzが1950年代に考案した。明るい月を減光させる平行平面の円形フィルターを中央におき,月の運動を補償するためにこれを回転させるのが特徴である。国際地球観測年の間,世界各国で使用されたが精度が不十分で,その後は使われていない。【冨田 弘一郎】

出典 株式会社平凡社世界大百科事典 第2版について 情報

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