Prime lens

• Main Authors: ZHAI LINYAN, CHENG JIAJIAN, LIANG WEICHAO, YING YONGMAO
• Format: Patent
• Language: Chinese; English
• Published: 20.12.2022
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention relates to a prime lens along an optical axis in a direction from an object side to an image side. The invention relates to an optical lens, which sequentially comprises a first lens (L1) with negative focal power, a second lens (L2) with negative focal power, a third lens (L3) with positive focal power, a diaphragm (STO), a fourth lens (L4) with positive focal power, a fifth lens (L5) with negative focal power, a sixth lens (L6) with positive focal power, a seventh lens (L7) with positive focal power, an eighth lens (L8) with negative focal power and a ninth lens (L9) with positive focal power. The first lens (L1) is a concave lens in a paraxial region, the second lens (L2) is a concave lens in a paraxial region, the third lens (L3) is a convex-concave lens in a paraxial region, the eighth lens (L8) is a concave-convex lens in a paraxial region, and the ninth lens (L9) is a convex-concave lens in a paraxial region. The prime lens has the performance of high resolution, low cost, miniaturization