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

Claim 6:
7. 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 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:

0.2<SDX/STD<2;

0<SDY/STD<1.2;

0.2<EPDX/STD<2.1;

0<EPDY/STD<1.5;

0.7 mm<EPA/STD<10 mm;

0.5 mm<EPA/PL<5.5 mm;

0<SDX/EPDX<1.6;

0.5<SDY/EPDY<2.3;

1 mm<SA/STD<9 mm;

0.4<SA/EPA<2.4;

where 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, STD is a diameter of the aperture, EPDX is a maximum dimension of an entrance pupil measured across the optical axis, EPDY is a minimum dimension of the entrance pupil measured across the optical axis, 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, SA is an area of the variable hole of the light-shielding element, and EPA is an area of the entrance pupil of the lens module.