Patent ID: 11947092
Assignee: SINTAI OPTICAL (SHENZHEN) CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. The lens assembly as claimed in claim 1, wherein:
the second lens group comprises a variable stop; and
the lens assembly satisfies at least one of following conditions:

−12 mm<A−B<16 mm;

0.2<AB<10;

0.5<C/A<3;

2<TTL/A<11

wherein A is an interval from a second side surface of the lens closest to the second side in the first lens group to the variable stop along the axis, B is an interval from the variable stop to a first side surface of the lens closest to the first side in the fourth lens group along the axis, C is an interval from a first side surface of the lens closest to the first side in the fifth lens group to an image plane along the axis, and TTL is an interval from a first side surface of the lens closest to the first side along the axis in the first lens group to an image plane along the axis.