Illumination system and projection apparatus

A projection apparatus, comprising:

• an illumination system, comprising:
• a first light-emitting module, configured to emit at least one first color light, wherein the at least one first color light comprises a first partial light and a second partial light;
• a wavelength conversion unit, disposed on a transmission path of the first partial light, wherein the first partial light is converged to the wavelength conversion unit, the second partial light passes by a location beside the wavelength conversion unit, and the wavelength conversion unit converts the first partial light into a converted light, wherein a wavelength of the converted light is greater than a wavelength of the at least one first color light;
• a spherical-shell-shaped dichroic film, disposed on a transmission path of the at least one first color light between the first light-emitting module and the wavelength conversion unit, the spherical-shell-shaped dichroic film being pervious to the at least one first color light, and being capable of reflecting the converted light, wherein the converted light coming from the wavelength conversion unit is reflected by the spherical-shell-shaped dichroic film, and then at least partially coincides with the second partial light;
• and
• a transparent substrate, carrying the spherical-shell-shaped dichroic film;
• a dichroic light splitting/combining module, disposed on transmission paths of the second partial light and the converted light coming from the spherical-shell-shaped dichroic film to split the second partial light and the converted light into a plurality of illumination beams of different colors;
• a plurality of light valves, respectively disposed on transmission paths of the illumination beams of different colors, and respectively converting the illumination beams of different colors into a plurality of image beams of different colors;
• and
• an imaging lens, disposed on transmission paths of the image beams of different colors, wherein the dichroic light splitting/combining module combines the image beams of different colors and transmits the image beams of different colors to the imaging lens.