Multiple-wavelength light emitting device and electronic apparatus

A multiple-wavelength light emitting device for emitting light in a plurality of different wavelengths, comprising:

• light emission means for emitting light containing wavelength components to be output;
• a semi-transparent layer that transmits at least a portion of said light, placed at the back surface of said light emission means;
• a reflecting layer group provided on a first surface side of said light emission means, with said semi-transparent layer intervening, wherein reflecting layers that reflect light have specific wavelengths of light ejected to said first surface side from said light emission means via said semi-transparent layer are laminated in order in the direction of light axis in correspondence with wavelengths of light to be output;
• and
• a semi-reflecting layer group, provided on a second surface side in opposition to said first surface of said light emission means, formed by laminating multiple types of semi-reflecting layers each laver corresponding to a different wavelengths of reflected light out of multiple different wavelengths, wherein semi-reflecting layers that reflect a portion of light having specific wavelengths of light ejected to said second surface side from said light emission means and transmit the remainder thereof are laminated in order in the direction of said light axis in correspondence with wavelengths of light to be output;
• wherein:
• in two or more light emission regions wherein output light wavelength differs, the distance between the reflecting surface for light from said light emission means in a reflecting layer in said reflecting layer group that reflects light of wavelength output in that light emission region and the reflecting surface for light from said light emission means in a semi-reflecting reflecting layer in said semi-reflecting layer group that reflects a portion of light of wavelength output in that light emission region is adjusted so that it becomes a resonating optical path length for light ejected from that light emission region.