Projection lens and projection device

A projection device comprising an illumination system, at least one light valve, and a projection lens, wherein

• the illumination system is configured to provide an illumination beam;
• the at least one light valve is disposed on a transmission path of the illumination beam to convert the illumination beam into an image beam;
• and
• the projection lens is disposed on a transmission path of the image beam, and the projection lens comprises a first optical lens assembly and a second optical lens assembly, wherein
• the first optical lens assembly is configured to transmit the image beam to the second optical lens assembly;
• and
• the second optical lens assembly is configured to project out the image beam from the projection lens, the second optical lens assembly comprises a first reflective element, a second reflective element, and an optical member, the optical member is disposed between the first reflective element and the second reflective element, and the optical member comprises a translucent region and a reflective region, wherein
• the first reflective element is configured to reflect the image beam from the first optical lens assembly and transmit to the translucent region;
• the translucent region is configured to allow the image beam from the first reflective element to pass through and transmit to the second reflective element;
• the second reflective element is configured to reflect the image beam from the translucent region and transmit to the reflective region;
• and
• the reflective region is configured to reflect the image beam from the second reflective element.