Acta Optica Sinica, Volume. 8, Issue 6, 558(1988)
Direct-shadow photographic system with 900-mm diameter Fresnel optical lenses
In this paper a large aperture direct-shadow optical system consistingof φ900 mm diameter Fresnel optical lenses is presented for the first time. The experimental results show that the system can meet the needs of general direct-shadow photography. The effort not only enlarges the application scope of Fresnel Optical Lenses but also opens up a new way toward the developement of large aperture direct-shadow optical system.
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LIN YUJU, WU JIZONG, LIU TIEGEN. Direct-shadow photographic system with 900-mm diameter Fresnel optical lenses[J]. Acta Optica Sinica, 1988, 8(6): 558