LIGHT EMITTING APPARATUS USING DICHROIC FILTER

摘要

A light emitting device using a dichroic filter is provided to improve a luminous efficiency of the device by mixing and emitting light generated from the device and a phosphor. An optical filter is positioned on a light path through of the light emitted from at least one semiconductor light emitting device(201). A phosphor(202) absorbs the light passing through the optical filter, and emits light having a wavelength different from the absorbed light. The optical filter is an optical dichroic filter(204) with an optical coating which passes the light having a wavelength corresponding to a light emitting peak of the light emitted from the semiconductor light emitting device and reflects the light having a wavelength corresponding to the light emitted from the phosphor.