METHOD OF ASSEMBLING OBJECTIVES, WORKING IN INFRARED SPECTRUM Russian patent published in 2009 - IPC G02B7/02 

FIELD: physics; optics.

SUBSTANCE: proposed method involves fitting an imitation of each lens, made from material which is transparent in the visible spectrum, into its frame and fixing the imitation lens into a "floating" chuck such that, the centre of curvature of the base surface of the imitation lens coincides with centre of oscillation of the cup of the "floating" chuck. Through adjustment of the frame in the "floating" chuck while monitoring using an autocollimating microscope, autocollimation images of the centres of curvature of two optical surfaces of the imitation lens are displayed on the axis of rotation the main spindle. After that, the lens imitation is removed from the frame and replaced by an objective lens. Self-centring of the hidden surface of the lens takes place. By turning the cup of the "floating" chuck, while monitoring with an autocollimating microscope, an autocolliamation image of the centre of curvature of the visible surface of the lens is displayed on the axis of rotation of the main spindle. After that, the butt end and cylindrical surfaces of the frame are processed.

EFFECT: more accurate assembly of objectives with lenses, transparent in the visible spectrum, and more functional capabilities.