Folded lens system

A folded lens system comprising:

• a lens module comprising a plurality of lenses;
• an image sensor having an imaging plane;
• and
• a first reflection module disposed between the lens module and the image sensor and configured to change a path of light passing through the lens module a plurality of times,
• wherein the light passing through the lens module is subjected to three total internal reflections and two reflections by the first reflection module,
• wherein the first reflection module comprises a first surface, a second surface, a third surface, a fourth surface, a fifth surface and a sixth surface,
• wherein the first surface is disposed closest to the lens module, and the sixth surface is disposed closest to the image sensor,
• wherein an angle between the first surface and the second surface, an angle between the second surface and the third surface, and an angle between the fourth surface and the sixth surface are acute angles,
• wherein an angle between the fifth surface and the sixth surface is an obtuse angle,
• wherein the light passing through the lens module is refracted while passing through the first surface and is incident on the second surface, and an incident angle of the light incident on the second surface is greater than a critical angle,
• wherein the light totally reflected from the second surface is incident on the third surface, and an incident angle of the light incident on the third surface is less than a critical angle,
• wherein the light reflected from the third surface is incident on the first surface, and an incident angle of the light incident on the first surface is greater than a critical angle,
• wherein the light totally reflected from the first surface passes through the second surface and the fourth surface, is refracted and is incident on the fifth surface, and an incident angle of the light incident on the fifth surface is less than a critical angle,
• wherein the light reflected from the fifth surface is incident on the fourth surface, and an incident angle of the light incident on the fourth surface is greater than a critical angle, and
• wherein the light totally reflected from the fourth surface passes through the sixth surface, is refracted, and is incident on the image sensor.