Wavelength conversion device and projector

A projector, comprising:

• an excitation light source device, adapted to provide an excitation light beam;
• a wavelength conversion device, adapted to convert a wavelength of the excitation light beam, wherein the wavelength conversion device comprises:
• a main body, having at least two sections;
• a first reflective layer, disposed on the main body and aligned to one of the sections;
• a second reflective layer, disposed on the main body and aligned to another one of the sections, wherein materials of the first reflective layer and the second reflective layer are different;
• a first wavelength conversion layer, disposed on the main body and aligned to the first reflective layer, and the first wavelength conversion layer being adapted to convert the excitation light beam into a first excited light beam having a first wavelength;
• and
• a second wavelength conversion layer, disposed on the main body and aligned to the second reflective layer, and the second wavelength conversion layer being adapted to convert the excitation light beam into a second excited light beam having a second wavelength, wherein the first wavelength and the second wavelength are different,
• wherein the material of the one of the sections aligned to the first reflective layer is different from the material of the another one of the sections aligned to the second reflective layer;
• a light valve, disposed on a transmission path of the excitation light beam, and adapted to convert the excitation light beam into an image light beam;
• and
• a projection lens, located on a transmission path of the image light beam, and adapted to convert the image light beam into a projection light beam.