Prisms are components with at least two polished plano surfaces separated by a wedge angle, they are essentially blocks of optical glass that are arranged to be at precisely controlled angles to each other.

Detailed Introduction

Prisms are components with at least two polished plano surfaces separated by a wedge angle, they are essentially blocks of optical glass that are arranged to be at precisely controlled angles to each other. They can be used to deflect, deviate and rotate beams of light as well as dispersing their wavelengths. Optical prisms can be found in dual channel instruments, anamorphic systems, imaging systems or any other application where beam steering and/or image manipulation is needed. There are many types of prism, each having a particular geometry to achieve the reflections necessary to perform a specific imaging task. The most important to the prism is the angular specification of prism.

ML Optic can offer the following prisms:

1.pngRight Angle Prisms
Right Angle Prisms are the most commonly used prisms to turn or deflect a light beam through 90 degree or 180 degree of angle. They are widely applied in place of mirrors which is easier to deform and more difficult to mount under external mechanical stress. They are made of optical glass of good quality with plano surfaces precisely made.
2.pngWedge Prisms
Wedge prisms are made of optical glass, which are used to deflect the line beam in optical systems. They are made in different sizes and wedge angles according to the customer’s specification. Alternative materials are also available such as fused silica which is more stable than glass with a higher coefficient of heat expansion and hardness.  
3.pngPenta- Prisms
The penta-prism is a constant deviation prism. It means that the same exact 90-degree deflection of light beam is kept regardless of the angle between these light beam and the optical axis. They are often used in range finder, surveying and alignment. Various sizes and precision of the penta prism can be made according to customers specifications
4.pngDove Prisms
The main application for dove-prism is as image rotators in a variety of optomechanical systems. As the prism is rotated, the image passing through will rotate at twice angular rate of the prism. It is very important that the incident beam is collimated. In addition the large reflecting face must be kept very clean and the prism should not be rested on this face. We supply other dove-prisms, if you have some special request, please contact an Application Engineer for further details
5.pngRhomboid Prisms
The main application for rhomboid-prism is controlling and redirecting the optical path without affecting the image orientation. They can be used to displace an optical center line for light beam folding and stereoscopic systems of different sizes. 
6.pngAmici Roof Prisms
The Amici roof prism with high quality roof surfaces deviates or deflects the image through an angle of 90 degree. This kind of roof prism is often applied in case demanding both right-angle deflection and image erection, as in some instrument viewfinders.
Amici roof prisms with roof angle tightly controlled for accurate applications are available. Special prisms of different sizes are also available on request.
7.pngCorner Cube
Corner cube retroreflector is a conical prism within which there are three internal outgoing surfaces at high precision right angles to one another. They are made to reflect back the light beam entering the prism along the original path, regardless what the orientation of the incident light may be. Therefore, it can be used for precision alignment at place where is difficult to reach, and the most popular function is used as a target in distance measuring 

High Precision Prism With Optical Bonding                             


MLOPTIC is capable to provide adhesive bonding for optical prism assembly, including optical contact and glue bonding. We have ever provided a prism assembly with 10 prisms bonded together, the total angle tolerance can be 5 seconds. The prism assemblies are widely used in laser applications. There are two types of these prisms, glass precision right angle prisms and fused silica right angle prisms.                  

Manufacturing Capability:



Common Glass (Schott, Ohara, Hoya, CDGM) and Fused Silica


up to 150mm

Angle Tolerance

±1 second

Form Error




Surface Quality


Super Finish


Glue or Optical contact