Patent ID: 11947090
Assignee: ASIA OPTICAL CO., INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A lens module, comprising:
a plurality of lenses;
an annular body; and
a reflective element;
wherein the reflective element, the lenses and the annular body are sequentially arranged along an optical axis from an object side to an image side;
wherein the reflective element is disposed between the object side and the lenses, and the reflective element comprises a reflective surface;
wherein the reflective element further comprises an incident surface and an emitting surface which are perpendicular to each other;
wherein the annular body is disposed between the object side and the lenses, between the lenses, or between the lenses and the image side;
wherein the annular body is an aperture or a light-shielding element, the light-shielding element comprises a variable hole;
wherein the lens module satisfies at least one of following conditions:

0.8<PL/EPDX<4;

0.7<PH/EPDY<3;

0.5 mm<EPA/PL<5.5 mm;

0.8<(SDY+EPDY)/PH<2;

0.5<(SDX+EPDX)/PL<2.2;

2<(SDX/SDY)+(EPDX/EPDY)+(PL/PH)<6.5;

where PL is a length of the reflective element, the reflective surface comprises a side, the length of the reflective element equals a length of the side of the reflective surface, the side of the reflective surface is perpendicular to the optical axis, EPA is an area of an entrance pupil of the lens module, PH is a height of the reflective element that equals a length of a side of the emitting surface wherein the side of the emitting surface is perpendicular to the incident surface, SDX is a maximum dimension of the variable hole measured across the optical axis, SDY is a minimum dimension of the variable hole measured across the optical axis, EPDX is a maximum dimension of the entrance pupil measured across the optical axis, and EPDY is a minimum dimension of the entrance pupil measured across the optical axis.