Vehicle lamp system based on PBS (polarization beam splitter)
A vehicle lamp system based on a PBS (Polarization Beam Splitter) is provided, including a light source, the PBS, a collimating lens set, an imaging lens set, an LCOS (Liquid Crystal on Silicon) control chip and a light path control unit. The collimating lens set and the PBS are successively arranged along a light emission direction of the light source. The LCOS control chip is arranged at a light path of an S wave reflected by a contact surface of the PBS. The imaging lens set is arranged at an emergent light path of the S wave after being modulated by the LCOS control chip and transmitted through the contact surface of the PBS. The light path control unit is arranged at a light path of a P wave transmitted through the contact surface of the PBS. Through the light path control unit, utilization of a light energy is improved.
1. A vehicle lamp system based on a PBS (Polarization Beam Splitter), comprising a light source ( 1 ), the PBS ( 3 ), a collimating lens set ( 2 ), an imaging lens set ( 5 ), an LCOS (Liquid Crystal on Silicon) control chip ( 4 ) and a light path control unit ( 6 ), wherein: the collimating lens set ( 2 ) and the PBS ( 3 ) are successively arranged along a light emission direction of the light source ( 1 ); the LCOS control chip ( 4 ) is arranged at a light path of an S wave ( 11 ) reflected by a contact surface of the PBS ( 3 ); the imaging lens set ( 5 ) is arranged at an emergent light path of the S wave ( 11 ) after being modulated by the LCOS control chip ( 4 ) and transmitted through the contact surface of the PBS ( 3 ); the light path control unit ( 6 ) is arranged at a light path of a P wave ( 12 ) transmitted through the contact surface of the PBS ( 3 ); and the light path control unit ( 6 ) is vehicle lamp components, comprising a mirror ( 7 ), a light shield ( 8 ) and a magnifying glass ( 9 ).
2. The vehicle lamp system based on the PBS, as recited in claim 1 , wherein: the contact surface of the PBS ( 3 ) and an incident light after being collimated by the collimating lens set ( 2 ) form an angle of 45°.
3. The vehicle lamp system based on the PBS, as recited in claim 1 , wherein: when liquid crystal of the LCOS control chip ( 4 ) is bright, the LCOS control chip changes the S wave reflected by the contact surface of the PBS ( 3 ) to the P wave, so as to be transmitted through the contact surface of the PBS ( 3 ) and enter the imaging lens set ( 5 ).
4. The vehicle lamp system based on the PBS, as recited in claim 1 , wherein: the collimating lens set ( 2 ) consists of a negative meniscus lens and a plane convex lens, which are arranged coaxially; the negative meniscus lens is close to the light source ( 1 ), and the plane convex lens is close to the PBS ( 3 ).
5. The vehicle lamp system based on the PBS, as recited in claim 1 , wherein: the imaging lens set ( 5 ) consists of a concave lens and a plane convex lens, which are arranged coaxially; the concave lens is close to the PBS ( 3 ), and the plane convex lens is far away from the PBS ( 3 ).