Reflective camera and electronic device

1. A reflective camera, comprising:

a first mirror provided with a through hole and configured to reflect an incident light;

a second mirror arranged on a first side of the first mirror, and configured to reflect the incident light reflected by the first mirror; and

an imaging detector arranged on a second side of the first mirror, and configured to receive the incident light reflected by the second mirror through the through hole, and further to convert the incident light into an electrical signal for imaging,

wherein at least one of the first mirror or the second mirror is a mirror with a variable curvature,

wherein the first mirror or the second mirror with the variable curvature is a liquid lens, and

wherein the liquid lens comprises:

a first surface;

a second surface facing away from the first surface;

a filler arranged between the first surface and the second surface; and

a control electrode arranged to a side of the liquid lens in a direction perpendicular to an optical axis of the liquid lens, and configured to provide a pressure in a predetermined direction to the first surface and the second surface, wherein the predetermined direction is a direction oriented towards a space between the first surface and the second surface.

2. The reflective camera according to claim 1 , further comprising a transmission module,

wherein the transmission module is configured to receive the incident light reflected by the second mirror through the through hole, and further to converge the incident light to the imaging detector.

3. The reflective camera according to claim 2 , wherein the second mirror, the first mirror, the transmission module and the imaging detector are arranged coaxially.

4. The reflective camera according to claim 1 , wherein the control electrode is configured to provide the pressure in the predetermined direction to an edge part of the first surface and an edge part of the second surface of the first mirror.

5. The reflective camera according to claim 1 , wherein the mirror with the variable curvature satisfies a condition formula:

f=r/ 2,

wherein f is a focal length of the mirror with the variable curvature, r is a curvature radius of the mirror with the variable curvature; and

the reflective camera is configured to focus by changing the focal length f of the mirror with the variable curvature.

6. The reflective camera according to claim 5 , wherein the focal length f of the mirror with the variable curvature is configured to be changed by changing the curvature radius of the mirror.

7. The reflective camera according to claim 1 , wherein the second mirror is arranged on an object side of the first mirror, and the imaging detector is arranged on an image side of the first mirror.

8. The reflective camera according to claim 1 , wherein the first mirror comprises a first object-side surface and a first image-side surface facing away from each other, the second mirror comprises a second object-side surface and a second image-side surface facing away from each other, the first object-side surface is opposite to the second image-side surface, the first object-side surface is configured to reflect the incident light, and the second image-side surface is configured to reflect the incident light reflected by the first object-side surface.

9. The reflective camera according to claim 8 , wherein the first object-side surface is one of a paraboloid, a spherical surface, an ellipsoid or a hyperboloid.

10. The reflective camera according to claim 8 , wherein the second image-side surface is one of a paraboloid, a spherical surface, an ellipsoid or a hyperboloid.

11. The reflective camera according to claim 8 , wherein the first object-side surface is one of a paraboloid, a spherical surface, an ellipsoid or a hyperboloid; and

the second image-side surface is one of a paraboloid, a spherical surface, an ellipsoid or a hyperboloid.

12. The reflective camera according to claim 8 , wherein the first object-side surface is a concave surface, and the second image-side surface is a convex surface.

13. The reflective camera according to claim 2 , wherein the transmission module comprises at least one lens arranged coaxially.

14. The reflective camera according to claim 2 , further comprising an infrared optical filter arranged between the transmission module and the imaging detector, and configured to filter infrared light in an environment.

15. An electronic device, comprising:

a housing; and

a reflective camera joined with the housing, the reflective camera comprising:

a first mirror provided with a through hole and configured to reflect an incident light;

a second mirror arranged on a first side of the first mirror, and configured to reflect the incident light reflected by the first mirror; and

an imaging detector arranged on a second side of the first mirror, and configured to receive the incident light reflected by the second mirror through the through hole, and further to convert the incident light into an electrical signal for imaging,

wherein at least one of the first mirror or the second mirror is a mirror with a variable curvature,

wherein the first mirror or the second mirror with the variable curvature is a liquid lens, and

wherein the liquid lens comprises:

a first surface;

a second surface facing away from the first surface;

a filler arranged between the first surface and the second surface; and

a control electrode arranged to a side of the liquid lens in a direction perpendicular to an optical axis of the liquid lens, and configured to provide a pressure in a predetermined direction to the first surface and the second surface, wherein the predetermined direction is a direction oriented towards a space between the first surface and the second surface.

16. The electronic device according to claim 15 , wherein the housing comprises:

a main body; and

a movable bracket configured to slide into or out of the main body, the reflective camera being mounted to the movable bracket.

17. A reflective camera, comprising:

a first mirror provided with a through hole and having a concave object-side surface;

a second mirror arranged on an object side of the first mirror, and having a convex image-side surface opposite to the concave object-side surface of the first mirror; and

an imaging detector arranged on an image side of the first mirror, and configured to receive an incident light reflected by the first mirror and the second mirror via the through hole, and further to convert the incident light into an electrical signal for imaging,

wherein the reflective camera is configured to focus by changing a focal length of at least one of the first mirror and the second mirror,

wherein at least one of the first mirror or the second mirror is a mirror with a variable curvature,

wherein the first mirror or the second mirror with the variable curvature is a liquid lens,

wherein the liquid lens comprises:

a first surface;

a second surface facing away from the first surface;

a filler arranged between the first surface and the second surface; and

a control electrode arranged to a side of the liquid lens in a direction perpendicular to an optical axis of the liquid lens, and configured to provide a pressure in a predetermined direction to the first surface and the second surface, wherein the predetermined direction is a direction oriented towards a space between the first surface and the second surface.