Abstract: An ophthalmic illuminator is disclosed, one embodiment comprising: an illumination source, wherein the illumination source produces an arc; a lens, such as a condensing lens, for focusing light produced by the illumination source arc; and an optical fiber for carrying the focused light to a surgical site, such as an eye. The illumination source is positioned offset from a longitudinal axis of the optical fiber to compensate for shifting of the illumination source arc over time. The offset position can be such that the illumination source is positioned in a vertically offset position from the longitudinal axis of the optical fiber. The longitudinal axis corresponds to the optical path axis of the optical fiber. The ophthalmic illuminator can further comprise a reflector for reflecting the light produced by the illumination source arc, wherein the reflector is positioned offset from the illumination source to decrease the rate of erosion of an illumination source cathode.

Abstract: One preferred embodiment of the invention comprises a catadioptric telescope comprising a primary mirror, a secondary mirror, and a corrector. The primary mirror, secondary mirror, and corrector are disposed along an optical path. A tube assembly preferably houses the primary mirror and corrector. The secondary mirror is preferably centrally located within and connected to the corrector. One or more actuators are mechanically connected to the corrector (and the secondary mirror affixed to the corrector). The actuators are movable such that the corrector and secondary mirror may be moved with respect to the primary mirror. By manipulating the position and/or orientation of the secondary mirror, the telescope may be focused and/or collimated.