US Patent 7570442 Lens module and method for assembling same

A lens module includes: a lens barrel, a first lens, a second lens and a transparent adhesive layer. The first and second lenses are received in the lens barrel, and a clear aperture of the first lens is equal to and in alignment with that of the second lens. The transparent adhesive layer is applied between the first and second lenses in a manner such that the transparent adhesive layer spaces and joins the first and second lenses. A method for assembling the lens module is also provided.