Patent ID: 6621607
Filing Date: 2003-09-16
Classification: F16B,G02B,G03H,Y10S

Abstract:
In an apparatus comprising an element which carries diffraction grating(s) which element is associated with a source energizable for movement of said element, wherein said diffraction grating(s) are moved by movement of said element and wherein movement of said diffraction grating(s) diffract energy incident on said diffraction grating(s) to generate different select diffracted energies from said diffraction grating(s), the improvement which comprises:said element being a faceted rotatable element (FRE) having an array of facets each facet of said array bearing a diffraction grating, and said FRE having a pivot point; said source being fixed relative to said FRE and energizable to cause a select facet of said array to be rotated, by rotation of said FRE about said pivot point, from a facet resting station to a facet viewing station, whereat any said select diffracted energy(s) can be generated and displayed to an observer located at a stationary position with respect to said FRE, and only said select diffracted energy(s) will be displayed to said observer at said stationary position with respect to said FRE.