Lens apparatus for projection

Abstract

A lens apparatus for projection includes a plurality of lenses on an optical axis. A shading plate 11 for covering the peripheral portion of the lens to block off light entering the peripheral portion is provided as a single member on the optical axis with the lenses to omit an inking process. In addition, the shading plate 11 is integrally provided with a contrast compensating plate 13 for compensating a projected image, so that it is not required to provide any portions for supporting the contrast compensating plate 13. Moreover, a shading wall 23 for blocking off light leaking out of the peripheral portion of the lens is provided on the peripheral portion of the shading plate 11. Thus, it is possible to provide a lens apparatus for projection, which has a simple structure and which can be easily assembled to reduce the producing costs.

Dependencies are inferred from the claim text.