Patent ID: 7446931

Claim:
A plural-wavelength light source comprising: a first wavelength source operable to emit light at a first wavelength; a polarizer aligned to receive the light at the first wavelength from the first wavelength source and operable to transmit polarized light at the first wavelength and reflect light at second and third wavelengths; a wavelength converter aligned to receive the first wavelength of light from the polarizer and configured to convert the first wavelength of light to the second wavelength of light; a cavity mirror aligned to receive light at the first and second wavelengths from the wavelength converter and configured to reflect light at the first and second wavelengths toward the wavelength converter; and a third wavelength source operable to emit light at a third wavelength through the cavity mirror and through the wavelength converter, wherein the polarizer is aligned to receive light at the second and third wavelengths from the wavelength converter and configured to direct light at the second and third wavelengths along an output axis as a composite beam of light.