Projection optical core, projection system, and related device

A projection system, comprising:

• a light source;
• a projection optical core engine configured to receive the input light beam from the light source;
• a lens configured to receive the imaging light beam from the projection optical core engine, and perform projection imaging on the imaging light beam;
• and
• wherein:
• the projection optical core engine comprises an optical splitting assembly, a reflector group, and an image modulation module, wherein the optical splitting assembly comprises a first dichroic mirror and a second dichroic mirror, and the first dichroic mirror intersects with the second dichroic mirror;
• the optical splitting assembly is configured to split an input light beam to obtain a projection light beam, and transmit the projection light beam to the reflector group, and the projection light beam comprises a blue light beam, a green light beam, and a red light beam;
• the reflector group is configured to reflect the projection light beam to the image modulation module, the optical splitting assembly intersects with a reference plane, there is a first angle between a transmission direction of the input light beam and the reference plane, there is a second angle between the reference plane and a transmission direction of the projection light beam emerging from the reflector group, and an absolute value of the first angle is less than an absolute value of the second angle;
• and
• the image modulation module is configured to modulate the projection light beam to obtain an imaging light beam, and the imaging light beam is used for projection imaging.

A head-up display system, comprising:

• an optical deflection module;
• and
• a projection system, wherein:
• the projection system is configured to transmit the imaging light beam to the optical deflection module;
• the optical deflection module is configured to transmit the amplified imaging light beam to a windshield, and the imaging light beam forms a virtual image through the windshield;
• the projection system comprises a light source, a lens, and a projection optical core engine;
• the projection optical core engine is configured to receive the input light beam from the light source;
• and
• the lens is configured to:
• receive the imaging light beam from the projection optical core engine, and perform projection imaging on the imaging light beam;
• wherein the projection optical core engine comprises an optical splitting assembly, a reflector group, and an image modulation module, wherein the optical splitting assembly comprises a first dichroic mirror and a second dichroic mirror, and the first dichroic mirror intersects with the second dichroic mirror;
• the optical splitting assembly is configured to:
• split an input light beam to obtain a projection light beam, and transmit the projection light beam to the reflector group, and the projection light beam comprises a blue light beam, a green light beam, and a red light beam;
• the reflector group is configured to reflect the projection light beam to the image modulation module, the optical splitting assembly intersects with a reference plane, there is a first angle between a transmission direction of the input light beam and the reference plane, there is a second angle between the reference plane and a transmission direction of the projection light beam emerging from the reflector group, and an absolute value of the first angle is less than an absolute value of the second angle;
• and
• the image modulation module is configured to modulate the projection light beam to obtain an imaging light beam, and the imaging light beam is used for projection imaging.