Long-wave uncooled double-view-field infrared lens with focal length of 15-75 mm

• Main Authors: TANG XIUE, SHI JIAOJIAO, ZHANG YANSONG, XIE ZHICHENG
• Format: Patent
• Language: Chinese; English
• Published: 02.09.2022
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

An optical system of the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged in the optical axis direction from the object side to the image side, the first lens is a meniscus lens with the positive diopter, and the convex face of the first lens faces the object side; the second lens is a biconcave lens with negative diopter; the third lens is a meniscus lens with positive diopter, and the convex surface of the third lens faces the object side; the fourth lens is a biconcave lens with negative diopter; the fifth lens is a meniscus lens with positive diopter, and the convex surface of the fifth lens faces the object side. The optical system is simple and reasonable in structural design, high in resolution ratio and large in market angle, and rapid conversion between a large view field and a small view field is achieved. 本发明涉及一种焦距15-75mm长波非制冷双视场红外镜头，所述镜头的光学系统包括从物侧至像侧沿光轴方向依次设置的第一透镜、第二透镜、第三透镜、第四透镜以及第五透镜，所述第一透镜为弯月型正屈光度透镜，凸面朝向物侧；所述第二透镜为双凹型负屈光度透镜；所