G PHYSICS
G02 OPTICS
G02B OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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
G02B27/646 compensating for small deviations, e.g. due to vibration or shake