DRIVING MECHANISM FOR OPTICAL AXIS CORRECTING LENS

摘要

PURPOSE:To precisely detect the position of an optical axis correcting lens in a driving mechanism for the optical axis correcting lens suitable for optical system equipment requiring the correction of a camera shake. CONSTITUTION:Position sensors 16h and 16v detecting positional components obtained by dividing the position of a correcting convex lens 3 into the components of two directions (H-V direction) orthogonally crossed each other in a radial direction centering the optical axis X' of the correcting convex lens 3 respectively are provided and composed of light emitting diodes (LEDs) 17h and 17v and semiconductor position detecting elements (PSDs) 18h and 18v receiving the light of the LEDs and the LEDs and PSDs are attached to the lens holder 6 of the correcting convex lens and the lens barrel of a photographic lens system 2 respectively. Each of the PSDs is formed unidirectionally longer and arranged so that the longitudinal direction of the PSD and the radial direction centering the optical axis X of the photographic lens system almost coincide.