An imaging device, including an optical channel, a lens at a distal end of the optical channel, a differentiating element in the optical channel receiving light from the lens and differentiating the light into different wavelengths, a first sensor at a proximal end of the optical channel, a second sensor at the proximal end of the optical channel, the second sensor oriented substantially perpendicular to the first sensor, and a selection element between the first and second sensors receiving the differentiated light from the differentiating element via the optical channel and transmitting a first portion of the differentiated light to the first sensor and a second portion of the differentiated light to the second sensor.
