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es look good even hrough the glasses.

ankle Minis"—and an inmrnu'd HenKit k Steenhlik is applying holography to an old-fashioned idea: 3-D glasses. A lbNO mechanical engineering —spectrometers are a good example. These instruments seperate light into wavelength components for spectral analysis, says Hartman. "The advantages of the holographic process are our ability to fabricate the gratings with specific diffraction characteristics, gratings of large surface area, and enhanced fabrication ease. "The old technique required the use of time-consuming ruling methods with limited capabilities for grating fabrication." Holography is also useful in devising input couplers for optical wave guides—"a means of getting light into very thin optical wave

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are holographic film with interference gratings that shift the points at which different colors of light are focused. Thus blue objects appear to be behind red objects because the

Treats with a View e most unusual lions of holography Boston company that believes holograms should not only be seen— they should be tasted. 1 )iniensi( >nal Ft » ids Corp, has patented a process for imprinting

Because the ridges are so small— onlv about one or two nanometers in depth—the taste and texture of

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71

Georgia Tech Alumni Magazine Vol. 68, No. 02 1992