Projector with preferred lighting uniformity

A projector comprising:

• a collimator lens having a first part and a second part divided by an axle;
• a first illumination module corresponding to the first part, and adapted to emit a first illumination beam with a first polarized state;
• a second illumination module corresponding to the second part, and adapted to emit a second illumination beam with the first polarized state;
• an alignment module adapted to mix the first illumination beam with the second illumination beam, the alignment module comprising:
• a first reflective polarizer disposed between the first illumination module and the first part of the collimator lens, and adapted to reflect a first polarized beam and allow passing of a second polarized beam;
• a first phase retarder disposed between the first illumination module and the first reflective polarizer, and adapted to transform the first illumination beam into a second polarized state for projecting onto the first reflective polarizer;
• a first reflector corresponding to the second part;
• and
• a second reflective polarizer adapted to reflect the first polarized beam and allow passing of the second polarized beam, the second illumination beam being reflected toward the first reflector via the second reflective polarizer.