ZOOM LENS

PROBLEM TO BE SOLVED: To provide a zoom lens that reduces production cost. SOLUTION: The zoom lens includes a first lens group with a negative refractive power and a second lens group with a positive refractive power. The second lens group is disposed between the first lens group and an image side,...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: CHOU YU-HUNG, TSENG CHIEN-HSIUNG, KO INGO
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a zoom lens that reduces production cost. SOLUTION: The zoom lens includes a first lens group with a negative refractive power and a second lens group with a positive refractive power. The second lens group is disposed between the first lens group and an image side, and the first lens group and the second lens group moves between an object side and the image side. In addition, the first lens group includes a first lens with a negative refractive power, and the first lens is a meniscus lens with a convex surface facing the object side and has an Abbe number larger than 50. Further, a focal length of the zoom lens is F, a focal length of the first lens group is F1, and a curvature of a surface facing the second lens group of the first lens is R2, and then F, F1 and R2 satisfies -0.6