Waveguide image slicer.
A new image slicer with a simple structure has been developed for use in grating spectrometers. The image slicer has polished thin glass plates that work as optical waveguides. It has a square 0.5 mm x 0.5 mm input surface and a steplike output surface with a width of 50 mum that is thin enough for high spectral resolution measurement. The output surface is in the same plane as the input surface so that optical path differences between the plates do not affect the spectrometer optics. The image slicer is efficient, with optical systems with F ratios faster than 10, and can be used at wavelengths that range from visual (lambda = 0.4 mum) to the near infrared (lambda = 2 mum).
Suto
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Takami
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