Patent ID: 8733944

Claim:
An illumination system comprising: a plurality of light source modules for generating a plurality of light beams; a first wavelength transformer disposed in a predetermined position, and configured to transform the light beams into a first wave band light which comprises at least a first portion, a second portion, a third portion and a fourth portion; an optical apparatus disposed between the light source modules and the first wavelength transformer, and configured to focus the light beams to the predetermined position; a first angle selective film disposed on the first wavelength transformer; and a second angle selective film which is disposed on the first wavelength transformer; wherein the first wavelength transformer is disposed between the first angle selective film and the optical apparatus, and disposed between the first angle selective film and the second angle selective film; wherein the illumination system further has a main optical axis, an included angle of the first portion of the first wave band light and the main optical axis is smaller than a first predetermined angle so that the first portion of the first wave band light is capable of passing through the first angle selective film, an included angle of the second portion of the first wave band light and the main optical axis is greater than the first predetermined angle so that the second portion of the first wave band light is reflected from the first angle selective film, an included angle of the third portion of the first wave band light and the main optical axis is smaller than a second predetermined angle so that the third portion of the first wave band light is capable of passing through the second angle selective film, and an included angle of the fourth portion of the first wave band light and the main optical axis is greater than the second predetermined angle so that the fourth portion of the first wave band light is reflected from the second angle selective film.