Illumination system and projection apparatus

摘要

An illumination system including at least one laser source, at least one anisotropic light expanding element and a wavelength conversion element is provided. The at least one laser source emits a laser beam. The at least one anisotropic light expanding element is disposed on the transmission path of the laser beam and causes the laser beam to expand along a light expanding direction. The light expanding direction is substantially parallel to the slow axis of the laser beam. The wavelength conversion element is disposed on the transmission path of the laser beam. A projection apparatus is also provided.

主权项

1. An illumination system, comprising:
at least one laser source emitting a laser beam; at least one anisotropic light expanding element located on a transmitting path of the laser beam, allowing the laser beam to expand in a light expanding direction substantially parallel to a slow axis of the laser beam; and a wavelength conversion element located on the transmitting path of the laser beam, wherein the wavelength conversion element comprises at least one wavelength conversion area and at least one light transmission area, the at least one wavelength conversion area and the at least one light transmission area are capable of moving, such that the at least one wavelength conversion area and the at least one light transmission area insert into the transmitting path of the laser beam by turns, the laser beam passing through the wavelength conversion element when the at least one light transmission area inserts into the transmitting path of the laser beam, and the laser beam being converted into at least one converted beam by the at least one wavelength conversion area when the at least one wavelength conversion area inserts into the transmitting path of the laser beam.