Multicolor light mixing module

A multicolor light mixing module suitable for providing a multicolor laser beam to a laser projection apparatus, the multicolor light mixing module comprising:

• a first laser set comprising a plurality of first lighting units and a plurality of second lighting units in a sequential arrangement, the plurality of first lighting units emitting a first color light, the plurality of second lighting unit emitting a second color light;
• a light-dividing unit obliquely disposed opposite to the first laser set to allow partial transmission and partial reflection of the first color light and the second color light, for guiding the first color light to travel along a first light-dividing axis and a second light-dividing axis respectively and guiding the second color light to travel along the first light-dividing axis and the second light-dividing axis respectively, wherein the light-dividing unit comprises a first dichroic sheet, a first transmissive and reflective sheet, a second transmissive and reflective sheet and a second dichroic sheet;
• the first dichroic sheet is obliquely disposed on the second light-dividing axis and opposite to the plurality of second lighting units;
• the first transmissive and reflective sheet is obliquely disposed on the first light-dividing axis and opposite to the plurality of first lighting units;
• the second dichroic sheet is obliquely disposed on the first light-dividing axis and located between the first transmissive and reflective sheet and the light-mixing unit;
• the second transmissive and reflective sheet is obliquely disposed on the second light-dividing axis and opposite to the second dichroic sheet;
• a light-mixing unit obliquely disposed opposite to the light-dividing unit for mixing the first color light and the second color light to form a first laser beam along a first light-mixing axis and form a second laser beam along a second light-mixing axis;
• a light-homogenizing member disposed on the first light-mixing axis and the second light-mixing axis for homogenizing the first laser beam and the second laser beam;
• and
• a condensing lens disposed on the first light-mixing axis and the second light-mixing axis and located between the light-homogenizing member and the light-mixing unit, for condensing the first laser beam and the second laser beam;
• wherein the first dichroic sheet reflects the first color light and allows the second color light to pass therethrough and then travel along the second light-dividing axis;
• the first transmissive and reflective sheet allows the first color light to pass therethrough partially and then travel along the first light-dividing axis and partially reflects the first color light to the first dichroic sheet to make the first color light travel along the second light-dividing axis;
• the second dichroic sheet reflects the second color light to the light-mixing unit and allows the first color light travelling along the first light-dividing axis to pass therethrough to the light-mixing unit;
• the second transmissive and reflective sheet allows partial transmission of the second color light travelling along the second light-dividing axis to the light-mixing unit, partially reflects the second color light to the second dichroic sheet to make the second color light travel along the first light-dividing axis, and allows the first color light travelling along the second light-dividing axis to pass therethrough to the light-mixing unit.