Laser reflection unit

A laser reflection unit for a laser phosphor projector, comprising:

• a housing having a top portion and a bottom portion mechanically fastened to the top portion, the top portion and the bottom portion correspondingly having stationary vanes provided on the inside wall of the housing, the stationary vanes being spirally arranged around a central axis of the laser reflection unit, the housing further having lateral walls extending from the top portion to the bottom portion;
• and
• a wheel arranged within the housing and having a top side and a bottom side opposite the top side, the top side being provided with a phosphor layer arranged annularly on the top side for converting an incident laser light beam into a reflected light beam, the bottom side being provided with cooling fins,
• wherein the wheel is rotatably received in the top portion of the housing such that the cooling fins are arranged to be encompassed by the stationary vanes of the top portion and is configured to rotate around the central axis, and
• wherein the stationary vanes of the top portion are configured to receive from a same plane an air flow generated by the cooling fins of the wheel upon rotation of the wheel, and the stationary vanes spirally guide the air flow outwards towards the lateral walls of the housing, and then the lateral walls guide the airflow downwards along the lateral walls towards the stationary vanes of the bottom portion, the stationary vanes of the bottom portion being configured to spirally guide the air flow inwards towards the centre of the bottom portion and upwards via the centre to the cooling fins of the wheel such that the airflow cools the phosphor layer.

A laser reflection unit for a laser phosphor projector, comprising:

• a housing having a top portion and a bottom portion mechanically fastened to the top portion, the top portion and the bottom portion correspondingly having stationary vanes, the stationary vanes forming spiral channels;
• and
• a wheel disposed within the housing and configured to generate air flow in a direction tangential to the circumference of the wheel, wherein:
• the wheel having a phosphor layer arranged annularly on a top side of the wheel;
• the stationary vanes of the top portion forming a compartment to receive the wheel;
• air flow generated by the wheel flows within a path formed by the channels;
• the air flow from the channels of the stationary vanes of the bottom portion is driven in rotational flow towards the wheel.