Optical system including lenses and prism for telephoto cameras

A device, comprising:

• one or more cameras;
• and
• one or more processors configured to process image signals generated from the one or more cameras,
• wherein at least one of the one or more cameras includes:
• a plurality of lenses;
• an image sensor;
• and
• a prism configured to:
• transmit light passing through the plurality of lenses through a first surface into the prism, wherein the first surface provides an initial transmission surface of the prism to receive the light passing through the plurality of lenses from a subject to be imaged at the image sensor;
• reflect, at a second surface of the prism, at least some of the light passing through the first surface of the prism, wherein an angle between the first surface and the second surface of the prism is in a range between 25 and 35 degrees;
• reflect, at the first surface of the prism, at least some of the light reflected from the second surface of the prism;
• reflect, at a third surface of the prism, at least some of the light reflected from the first surface of the prism;
• and
• reflect, at a fourth surface of the prism, at least some of the light reflected from the third surface of the prism to pass through the third surface out of the prism to the image sensor, such that at least some of the light transmitted through the first surface and reflected within the prism at the second surface, the first surface, the third surface, and the fourth surface reaches the image sensor to image the subject.

An optical system, comprising:

• a plurality of lenses;
• and
• a prism having at least four surfaces, wherein the prism is configured to:
• transmit light passing through the plurality of lenses through a first surface into the prism, wherein the first surface provides an initial transmission surface of the prism to receive the light passing through the plurality of lenses from a subject to be imaged at an image plane;
• reflect, at a second surface of the prism, at least some of the light passing through the first surface of the prism, wherein an angle between the first surface and the second surface of the prism is in a range between 25 and 35 degrees;
• reflect, at the first surface of the prism, at least some of the light reflected from the second surface of the prism;
• reflect, at a third surface of the prism, at least some of the light reflected from the first surface of the prism;
• and
• reflect, at a fourth surface of the prism, at least some of the light reflected from the third surface of the prism to pass through the third surface out of the prism to an image plane, such that at least some of the light transmitted through the first surface and reflected within the prism at the second surface, the first surface, the third surface, and the fourth surface reaches the image plane to image the subject.