Large-target-surface low-temperature lens and imaging method thereof

• Main Authors: CHEN QIUPING, KANG ZHEKAI, TANG XIUE, XIE LIHONG, ZHANG QINGSU
• Format: Patent
• Language: Chinese; English
• Published: 21.10.2022
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention relates to a large-target-surface low-temperature lens, which comprises a front group cylinder part A, a focusing part B and a rear group part C, a front lens set D is installed in the front set cylinder part A, a focusing lens set E is installed in the focusing part B, and a rear lens set F is installed in the rear set part C. The front lens set D comprises a positive crescent lens D1, a first gluing set and a second gluing set which are sequentially arranged in the light incidence direction. The focusing lens group E comprises a biconvex lens E1, a biconvex lens E2 and a third gluing group which are sequentially arranged along the incident direction of the light, and the rear lens group F comprises a fourth gluing group and a negative meniscus lens F3 which are sequentially arranged along the incident direction of the light. According to the lens, the structural design and the mechanical enhancement mode are used, the internal lens is effectively protected from being damaged by severe environm