Abstract: An illumination homogenizer is provided, including a fly eye-type lens array for receiving radiation from a source, the lens array being comprised of a twelve-lenslet subset of a 4×4 array of lenslets. The illumination homogenizer including a lens array comprised of a 4×4 array of lenslets, or a subset thereof, is also used in combination with a negative lens between a radiation source and the lens array.

Abstract: A spectrally resolved monochromatic light is provided which generally comprises an incoherent small source lamp, a concave grating for spectrally resolving the wavelengths of the light to obtain a particular wavelength, and an optical fiber for collecting and transmitting the particular wavelength. The light source can also have more than one optical fiber output, each having a different monochromatic wavelength. An order sorting device, such as a filter or dichroic mirror can be used to filter out the shorter wavelength radiation resulting from higher grating orders.