FR709224A - Dispositif pour l'obtention et l'effacement d'images négatives ou positives sur des surfaces phosphorescentes ou fluorescentes
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Dispositif pour l'obtention et l'effacement d'images négatives ou positives sur des surfaces phosphorescentes ou fluorescentes
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G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B23/12—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification
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General Physics & Mathematics
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Optics & Photonics
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FR709224D1930-04-141930-04-14Dispositif pour l'obtention et l'effacement d'images négatives ou positives sur des surfaces phosphorescentes ou fluorescentes
ExpiredFR709224A
(fr)