Dawe prisms lens, sometimes referred to as trapezoidal prisms lens, are another name for Dawe prisms. Dawe prisms can spin, invert, or backreflect an image, depending on the prism’s rotational angle and the surface the light is incident on.
A Dawe prism may spin, invert, or back-reflect an image because it is shaped like a right-angled prism with the top angle removed. One of the bevelled surfaces lets light in, which is completely mirrored on the longest bottom surface before leaving via the other bevelled surface. The image is inverted because entire reflection only happens once, changing the image’s rotational orientation.

Prisms can be affixed with glue or mechanically. There are six different ways that an object can move, including rotation around the three axes and translational motion along the three orthogonal axes. deformation of the device, etc. Prisms are typically mounted in point contact, but this is an ideal situation. In practice, this can be changed to a small face contact, a liner can be added to the mounting surface, they must be strictly coplanar, the angle must be in the right relationship, and the face contact cannot be changed to a line contact. An external load applies force to prevent the prism from detaching from the liner, and because there are numerous external forces, we must first decide what to do. We can disregard friction and the moment of tiny area contact, but we must first determine which of the several external forces is most important.

Important points to remember:

It is advised to collimate the incident beam if the incident light entering the Dawei prism is a converging beam since this will introduce image dispersion and degrade the image quality.

The transmitted beam’s polarisation state will be impacted by the phase difference between the s-wave and p-wave that results from the incident beam being fully reflected through the Optical Dawe Prism Lenses.