Patent ID: 11971603
Assignee: ASIA OPTICAL CO., INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. The scope as claimed in claim 13, wherein the objective lens system further comprises a I-3 lens and a I-4 lens, wherein:
the I-2 lens further comprises a plane surface facing the image side;
the I-3 lens is a plane-concave lens with negative refractive power and comprises a concave surface facing the object side and a plane surface facing the image side;
the I-4 lens is a plane-convex lens with positive refractive power and comprises a convex surface facing the object side and a plane surface facing the image side;
the I-3 lens and the I-4 lens are disposed between the I-2 lens and the relay lens system, and
the I-3 lens and the I-4 lens are arranged in order from the object side to the image side along the optical axis.