What Are the Types of Prisms?

Feb. 05, 2021
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A prism in optics is a transparent optical element with a polished and flat surface that refracts light. The correct surface angle depends on the needs of the application. The traditional geometry is a triangular-based prism with rectangular sides. This type is usually referred to when prisms are verbally mentioned, but many optical prisms are not prisms of this shape. Any material that is transparent to wavelength can be used to make a prism, but traditionally and cosmetically it is made of glass.Next, optical prism supplier will tell you what types of prisms are available.

What are the types of prisms?

(1) Right angle prisms

A right angle prism is the simplest of all prisms and can be interchanged with a plane mirror in many cases.

A right angle prism deflects light by 90°, and the image is left-rotating with only one reflection, so the image produced by a right-angle prism is unreadable.

Right angle prisms can be used in microscopes, telescopes, endoscopes, etc.

Note: When designing an optical system, the method of unfolding each reflecting surface of the prism and finding the equivalent parallel flat plate is used so that all the effects of the prism can be taken into account, which is the concept of prism unfolding diagram.

Right Angle Prism

(2) Prism of Pro

A right-angle prism can also be used as a reflective prism, in which case it is called a prism of Pro.

Assuming that the incident light is coplanar with the normal, a Prorogram is a perfect reflector.

The Pro Prism is a special case of a constant deflection prism, with a deflection angle of 180°.

(3) Angular cone prism

A prism consisting of three mutually perpendicular reflecting surfaces is called an angular cone prism.

The angular cone prism can reflect all kinds of light reaching the prism, regardless of the prism's orientation, back.

Therefore, angular cone prisms can be used in systems that require precise alignment. Examples include the reflector for a car's red taillight, the reflector placed on the surface of the moon in 1969, etc.

(4) Amish prisms

An Amish prism is also known as a ridge prism or a right-angle ridge prism.

An Amish prism produces a readable, 90° ray deviation, right-rotating image, which replaces the oblique reflecting surface of a right-angle prism with two mutually perpendicular reflecting surfaces, forming a ridge surface.

(5) Dawei prism

The light is rotated 180° after passing through the Dawei prism.

A Dowell prism with an aluminum coating on the diagonal surface, ideal for reflection.

(6) Pentagonal prisms

Pentagonal prisms with 90° light deviation and right-handedness of the image can be used as an optical tool to define right angles.

(7)Schmidt prisms 

The Schmidt prism is suitable for creating images with a 45° optical deflection of right-handedness, similar in function to the Amish roof prism. The 45° optical deviation of Schmidt prisms makes them important for eyepiece assembly and imaging systems that require path bending. Schmidt prisms can be combined with semi-pentagonal prisms to obtain Pecan prisms.


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