Projection camera lens

Abstract

The embodiment of the invention relates to the technical field of optics, and discloses a projection camera lens. The projection camera lens comprises a DMD chip, an equivalent prism, a galvanometer,a first refraction lens group, a diaphragm and a second refraction lens group in sequential arrangement, wherein the first refraction lens group comprises a first lens, a triple glued lens and a fifth lens in sequential arrangement; the triple glued lens comprises a second lens, a third lens and a fourth lens; and the fourth lens is an aspherical lens. The triple glued lens can realize good correction capability on spherical aberration, chromatic aberration and secondary spectrum, so that the definition of a projection image emitted from the projection camera lens is high; and the size of theprojection camera lens is small.

Description

technical field [0001] Embodiments of the present invention relate to the field of optical technologies, and in particular to a projection lens. Background technique [0002] With the development of projection technology, the requirements for the definition of projected images are getting higher and higher. In order to realize 4K projection, the current more economical way is to use 0.33 DMD chip, which has 1.05 million micromirrors and can project 1368x768 pixels, and then add a vibrating mirror between the DMD chip and the prism, and through the periodic vibration of the vibrating mirror, the number of pixels can be visually increased to achieve 4K resolution projection imaging. [0003] In the process of implementing the embodiments of the present invention, the inventors have found that there are at least the following problems in the above related technologies: when adding a vibrating mirror between the DMD chip and the prism, the back focus of the projection lens needs...

AI Technical Summary

Problems solved by technology

[0003] In the process of implementing the embodiments of the present invention, the inventors have found that there are at least the following problems in the above related technologies: when adding a vibrating mirror between the DMD chip and the prism, the back focus of the projection lens needs to reserve a space for the vibrating mirror. The back focus distance will be greatly increased, and the projection lens will be larger

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