Imaging lens and signal projection lamp using same

• Main Authors: QI GAOJIN, XIONG YANJIAN, ZHANG HAISHENG, SONG JIAN
• Format: Patent
• Language: Chinese; English
• Published: 09.06.2023
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS

The invention discloses an imaging lens and a signal projection lamp using the same. The imaging lens comprises an aperture diaphragm, a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along an optical axis from an image side to an object side, wherein the first lens, the fourth lens and the fifth lens all have positive focal power; the second lens and the third lens have negative focal power. The production cost can be reduced, the color difference in the using process can be reduced, and the light source utilization rate can be increased. 本发明公开了一种成像镜头及使用其的信号投影灯，包括：沿光轴由像侧到物侧方向依次设有的孔径光阑、第一透镜、第二透镜、第三透镜、第四透镜和第五透镜；其中所述第一透镜、第四透镜和第五透镜均具有正光焦度；所述第二透镜和第三透镜均具有负光焦度。本发明可以兼顾降低生产成本和兼顾降低使用过程中的色差和提高光源利用率。