G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/12 (2006.01) G01N 21/25 (2006.01) G02B 6/122 (2006.01) G02B 6/124 (2006.01) G02B 6/293 (2006.01) G02B 6/34 (2006.01) G02F 1/35 (2006.01) H04J 14/02 (2006.01)
Patent
CA 2419235
An optical element according to the invention constituted by a multilayer structure having a periodic structural portion as at least one region constituted by repetition of a predetermined period, wherein an end surface of the multilayer structure not parallel to layer surfaces of the multilayer structure is used as a light input surface whereas one or each of opposite surfaces of the multilayer structure parallel to the layer surfaces is used as a light output surface . The periodic structural portion of the multilayer structure can be regarded as a one-dimensional photonic crystal. Refracted light from the one-dimensional photonic crystal has good directivity and the direction of the refracted light has strong dependence on wavelength. When this wavelength dependence property is used, a spectroscopic device or a polarized light separating device of high resolution can be achieved without increase in device size.
Kittaka Shigeo
Nakazawa Tatsuhiro
Nara Masatoshi
Oya Kazuaki
Tsunetomo Keiji
Nippon Sheet Glass Co. Ltd.
Riches Mckenzie & Herbert Llp
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