Collimated optical system

An optical system comprising:

• a lens cell having a generally cylindrical lens cell body and an optical lens system therein, wherein the lens cell body has a lens cell central longitudinal axis and a lens cell optical axis, eccentrically offset from the lens cell central longitudinal axis;
• a sleeve having a generally cylindrical sleeve body, wherein the sleeve body has an outer surface with a first longitudinal axis and an inner surface with a second longitudinal axis, eccentrically offset from the first longitudinal axis, wherein the lens cell is inserted into the sleeve;
• and
• a housing having a generally cylindrical body, wherein the sleeve is at least partially inserted into the housing,
• wherein the lens cell and the sleeve are rotated relative to each other and to the housing such that the lens cell optical axis is aligned in a desired location, wherein, after the lens cell optical axis is aligned in the desired location, the lens cell is fixedly connected to the sleeve and the sleeve is connected to the housing to prevent rotation of the sleeve relative to the housing, and wherein the sleeve remains longitudinally translatable relative to the housing after the sleeve is connected to the housing to prevent rotation.