Reverse telephoto lens with ultra-long rear working distance

The utility model belongs to the technical field of optical imaging, and provides a super-long rear working distance reverse telephoto lens. The lens comprises a first lens group, a diaphragm, a second lens group, a beam splitter prism and an image sensor, the lens is suitable for projection equipment, and has the characteristics of good imaging quality, low distortion, good optical performance consistency, ultra-long rear working distance and the like. The lens comprises two triplet lenses, so that the lens makes a great contribution to chromatic aberration correction of the lens, and is greatly beneficial to projection imaging. 本发明创造属于光学成像技术领域，提出一种超长后工作距离反摄远镜头。该镜头包括第一透镜群、光阑、第二透镜群、分光棱镜和图像传感器；本镜头适用于投影设备，具有成像质量好、畸变低、光学性能一致性好和超长后工作距等特点。该镜头中包含两个三胶合透镜，对镜头色差校正有很大贡献，对投影成像有极大好处。