Abstract:
An apparatus consisting of stacked slab waveguides whose outputs are vertically staggered is disclosed. At the input to the stacked waveguides, the entrances to each slab lie in approximately the same vertical plane. A spot which is imaged onto the input will be transformed approximately to a set of staggered rectangles at the output, without substantial loss in brightness, which staggered rectangles can serve as a convenient input to a spectroscopic apparatus. A slit mask can be added to spatially filter the outputs so as to present the desired transverse width in the plane of the spectroscopic apparatus parallel to its dispersion.
Abstract:
An apparatus consisting of stacked slab waveguides whose outputs are vertically staggered is disclosed. At the input to the stacked waveguides, the entrances to each slab lie in approximately the same vertical plane. A spot which is imaged onto the input will be transformed approximately to a set of staggered rectangles at the output, without substantial loss in brightness, which staggered rectangles can serve as a convenient input to a spectroscopic apparatus. A slit mask can be added to spatially filter the outputs so as to present the desired transverse width in the plane of the spectroscopic apparatus parallel to its dispersion.
Abstract:
An optical element is described that is a single molded piece. It includes a parabolic mirror configured to reflect substantially collimated light incident along a first axis. The reflected light converges towards a virtual focal point located along a second axis. The piece also includes a plane turning mirror positioned with respect to the parabolic mirror such that the converging light hits a surface of the plane mirror after traveling a distance less than a focal length of the parabolic mirror. The plane mirror reflects the incident converging light outward as exit light, which focuses at a final focus point located a nonzero distance from the plane mirror. The final focus point is located in a plane defined by the second axis and a third axis, and is offset at a nonzero angle from the third axis relative to a point on the surface of the plane mirror.