Abstract: An insertion system to insert an intraocular lens in a patient's eye is provided. The system includes an introducer device having a tapering front sheath. The front sheath includes a receptacle at a proximal portion thereof that is sized and configured to receive the intraocular lens and inner peripheral guide rails at an intermediate portion thereof. The inner guide rails have an arcuate configuration and include a first member separated by an inner lumen from a second opposing member. The first and second member extend further into the inner lumen at the proximal end compared to the terminal distal end of the inner peripheral rails. The front sheath of the introducer device further includes a distal tip in fluid communication with the distal end of the inner peripheral guide rails.

Abstract: A mode-monitoring system used in connection with discrete beam frequency tunable laser provides optical feedback that can be used for adjusting the laser or for other processing associated with the use of the laser. For example, the output of a frequency tunable source for a frequency-shifting interferometer can be monitored to support the acquisition or processing of more accurate interference data. A first interferometer for taking desired measurements of optical path length differences traveled by different portions of a measuring beam can be linked to a second interferometer for taking measurements of the measuring beam itself. The additional interference data can be interpreted in accordance with the invention to provide measures of beam frequency and intensity.

Abstract: A frequency tuning system for a laser includes mode-matched lasing and feedback cavities. A reflective facet of the feedback cavity is adjustable for retroreflecting different feedback frequencies to the lasing cavity without changing a fixed length of the feedback cavity. A selection among resonant frequencies of the feedback cavity provides for tuning the laser through discrete resonant frequencies of the lasing cavity.

Abstract: An external cavity laser includes a lasing cavity and an optically coupled feedback cavity having differently spaced resonant lasing and feedback mode frequencies. The lasing modes can be collectively or individually matched to selected feedback modes. For example, a current driving the lasing cavity can be adjusted to shift individual lasing modes into alignment with the selected feedback modes.

Abstract: A mode-monitoring system used in connection with discrete beam frequency tunable laser provides optical feedback that can be used for adjusting the laser or for other processing associated with the use of the laser. For example, the output of a frequency tunable source for a frequency-shifting interferometer can be monitored to support the acquisition or processing of more accurate interference data. A first interferometer for taking desired measurements of optical path length differences traveled by different portions of a measuring beam can be linked to a second interferometer for taking measurements of the measuring beam itself. The additional interference data can be interpreted in accordance with the invention to provide measures of beam frequency and intensity.

Abstract: A frequency tuning system for a laser includes mode-matched lasing and feedback cavities. A reflective facet of the feedback cavity is adjustable for retroreflecting different feedback frequencies to the lasing cavity without changing a fixed length of the feedback cavity. A selection among resonant frequencies of the feedback cavity provides for tuning the laser through discrete resonant frequencies of the lasing cavity.

Abstract: Compound surfaces of a test object are interferometrically measured by a multi-beam probe. One of two measuring beams emerges from the probe at a fixed angle for measuring one of the compound surfaces, and the other measuring beam emerges from the probe at a variable angle for measuring a plurality of other compound surfaces.

Abstract: A method for aligning optical fibers to a lens array is provided, including, providing a planar reflective surface facing the front surface of lens array, locating one end of a fiber adjacent the back surface of the substrate upon which the lens array is formed or integrated to face one of the lenses of the array, propagating light through the fiber and the lens facing the fiber to the planar reflective surface, receiving returned reflected light from the reflective surface through the fiber and the lens facing the fiber, and then adjusting the position of the fiber to change the amount of the returned reflected light received by the fiber to determine when the fiber is at a position which provides a maximum amount or power of the returned reflected light, thereby aligning the end of the fiber to the focal point of the lens. The fiber is attached to the substrate at that position, such as by an adhesive material, and the method repeated for each fiber to a different lens of the array.