A wide angle lens includes a first lens group and a second lens group. The first lens group includes a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The second lens group includes a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, a sixth lens having a negative refractive power, and a seventh lens having a positive refractive power. The wide angle lens satisfies the following relationship: H2/G2R2<1.8, wherein H2 is a diameter of the image side surface of the first lens, and G2R2 is a curvature radius of the image side surface of the first lens.
WIDE ANGLE LENS, IMAGING DEVICE, AND UNMANNED AERIAL VEHICLE
2019-11-28
Patent
Electronic Resource
English
IPC: | G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B64C AEROPLANES , Flugzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen |
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