LIGHT-EMITTING ELEMENT

摘要

The light emitting device includes an organic electroluminescent element ( 20 ) and a diffractive optical element ( 30 ). The organic electroluminescent element ( 20 ) includes an anode layer ( 21 ), a cathode layer ( 22 ), and plural light emitting layers (231 and 232 ) interposed between the anode layer ( 21 ) and the cathode layer ( 22 ) and configured to emit light rays with different wavelengths. The diffractive optical element ( 30 ) is positioned in paths of light rays emitted from the organic electroluminescent element ( 20 ). The diffractive optical element ( 30 ) is designed to have different grating patterns ( 311 and 312) diffracting the light rays respectively emitted from the light emitting layers ( 231 and 232 ) for reducing chromatic aberration.