LIGHT-CONDENSING HOLOGRAM ARRAY

摘要

PROBLEM TO BE SOLVED: To easily detect the hologram face of a light-condensing hologram array such as a hologram color filter. SOLUTION: The light-condensing hologram array 11 comprises an array of transmission type light-condensing element holograms (a) which diffract collimated light of specified wavelength entering at a specified incident angle to converge to the position of a specified focal length. The light-condensing hologram array is provided with a hologram mirror (c) in the outer region of the array or as overlapped with the array.