Patent attributes
The invention provides a lens module. The lens module is disposed on a transmission path of a beam to expand the beam. The lens module includes a first lens assembly and a second lens assembly. The first lens assembly is disposed on the transmission path of the beam, and the first lens assembly has a first equivalent focal length. The second lens assembly is disposed on the transmission path of the beam from the first lens assembly, and the second lens assembly has a second equivalent focal length. The second equivalent focal length is greater than or equal to the first equivalent focal length. The invention also provides a projection device including the lens module. The lens module and the projection device of the invention can provide a projection image with uniform color distribution.
