Patent ID: 6791261
Filing Date: 2004-09-14
Classification: G02B,H01L

Abstract:
A multiple wavelength light emitting device for emitting light of a plurality of differing wavelengths comprising:light emission means for emitting light containing wavelength components to be output; a reflecting layer placed in proximity to said light emission means; a semi-reflecting layer group opposite said reflecting layer with said light emission means therebetween, the semi-reflecting layer group having semi-reflecting layers that reflect some light emitted from said light emission means having specific wavelengths and that transmit the remainder of the light emitted from said light emission means, stacked in order, in a direction of light advance so as to correspond with light wavelengths to be output; and two or more light emission regions wherein the wavelength of the output light differs wherein: the distance between the reflecting layer for light from the light emission means side of the semi-reflecting layer group that partially reflects light output from that light emission region and a point at which light is emitted, existing in an interval from an end surface of said light emission means on the semi-reflecting layer group side to a surface of said reflecting layer, is adjusted so as to have an optical path length such that light of the wavelength output from that light emission region resonates, wherein said point in the interval from the end surface of said light emission means on the semi-reflecting layer group side to the surface of said reflecting layer is a light emission point in said light emission means.