Patent ID: 11971603
Assignee: SINTAI OPTICAL (SHENZHEN) CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The scope as claimed in claim 1, wherein:
the eyepiece system comprises a III-1 lens, a III-2 lens, and a III-3 lens;
the III-1 lens and the III-2 lens is cemented;
the first lens group comprises a II-1-1 lens, wherein theII-1-1 lens is a plane-convex lens with positive refractive power and comprises a plane surface facing the object side and a convex surface facing the image side;
the second lens group is with positive refractive power;
the II-2-1 lens comprises a convex surface facing the object side and a concave surface facing the image side;
the II-2-2 lens comprises a convex surface facing the object side and another convex surface facing the image side;
the third lens group is with positive refractive power; and
the II-3-1 lens comprises a convex surface facing the object side.