| CPC G03B 21/204 (2013.01) [G02B 26/008 (2013.01); G03B 21/208 (2013.01); G03B 21/2013 (2013.01); G03B 21/2066 (2013.01); G03B 33/12 (2013.01); H04N 9/3161 (2013.01); H04N 9/3164 (2013.01)] | 19 Claims |
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1. A light source apparatus comprising:
a first light source that outputs first excitation light having a first wavelength band;
a second light source that outputs second excitation light having a second wavelength band;
a third light source that outputs third light having a third wavelength band;
a wavelength converter that has a first surface and a second surface opposite from the first surface and converts the first excitation light and the second excitation light in term of wavelength and emits fourth light having a fourth wavelength band different from the first, second, and third wavelength bands;
a light combiner mirror that combines the third light outputted from the third light source with the fourth light emitted from the wavelength converter to generate illumination light;
a first collimator optical system which is provided between the first light source and the light combiner mirror and which the first excitation light outputted from the first light source enters; and
a second collimator optical system which is provided between the wavelength converter and the light combiner mirror and which the fourth light emitted from the wavelength converter and the first excitation light outputted from the first light source and traveling via the combiner enter,
wherein the first excitation light outputted from the first light source is incident on the first surface of the wavelength converter via the light combiner mirror, and
the second excitation light outputted from the second light source is incident on the second surface of the wavelength converter, and
a focal length of the first collimator optical system is longer than a focal length of the second collimator optical system.
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