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G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
G02B27/644—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for large deviations, e.g. maintaining a fixed line of sight while a vehicle on which the system is mounted changes course
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FR587464D1915-11-251920-07-09Perfectionnements apportés aux dispositifs de visée
ExpiredFR587464A
(fr)