Lens holder in optical system incorporates an air gap, tubular mounting, positioning and fixing mechanisms, thrust surface and optical axis

摘要

At least two optically active surfaces (7,8) are in contact with one another to form an air gap (9). The lenses and or groups of lenses (2,3) are contained in a tubular mounting (1) which has at least one lens mounting and or group of lenses for positioning their axial position. Mechanisms (14) position and fix the lenses and or groups of lenses which are radially guided in the mounting, Pretension is produced parallel with the optical axis (10) towards the thrust surface (4),