Prism Introduction

     The prism is a polyhedron made of a transparent material such as glass or crystal. It is widely used in optical instruments. Prisms can be divided into several types according to their nature and use. For example, in a spectroscopic instrument, a composite lens is decomposed into a "dispersion prism" of a spectrum, and an equilateral prism is more commonly used; in an instrument such as a periscope or a binocular, the direction of light is changed, thereby adjusting the imaging position thereof. Reflective prisms, generally using right-angle prisms.

     VY Optoelectronics Co.,Ltd. offers a wide range of Optical Prisms in a variety of designs, substrates, or coating options. Designs include Right Angle, Amici, Penta, Schmidt, Wedge, Anamorphic, Equilateral, Dove, or Rhomboid prisms, in addition to Corner Cube Retroreflectors or Light Pipe Homogenizing Rods. Anti-reflection coatings include MgF2, UV-VIS, UV-AR, VIS 0°, VIS-NIR, or multiple laser line options.

      A polyhedron made of a transparent material is an important optical component. The plane from which the light is incident is called the side face, and the plane perpendicular to the side is called the main section. According to the shape of the main section, it can be divided into a triangular prism, a right-angle prism, a pentagonal prism, and so on. The main section of the prism is a triangle with two refractive surfaces, the angle between them is called the apex angle, and the plane which opposite the apex angle is the bottom surface.
     In modern life, prisms are widely used in digital equipment, science and technology, medical instruments and other fields. 
     1. Commonly used digital devices: cameras, closed circuit televisions, projectors, digital cameras, digital camcorders, CCD lenses, and various optical devices;
     2. Science and technology: telescopes, microscopes, level gauges, fingerprint readers, gun sights, solar energy converters and various measuring instruments;
     3. Medical equipment: cystoscope, gastroscope and various laser treatment equipments.

Prism Selection Guide

Equilateral Prisms - Dispersion
   1) Function: 
    ● Disperse White Light into Its Component Colors
   2) Application: 
    ● Spectroscopy
    ● Telecommunications
    ● Wavelength Separation



> Littrow Prisms - Dispersion, Deviation
   1) Function:
    ● Uncoated: Disperse White Light into Its Component Colors
    ● Coated: Deviate the Ray Path by 60°
    ● 
Image is Right-Handed
   2) 
Application:
    ● Spectroscopy (Uncoated)
    ● 
Multi-Spectral Laser System Tuning (Coated)

 

Right Angle Prisms - Deviation, Displacement
   1) Function:
   ●
Deviate the Ray Path by 90°
   ● Image is Left-Handed
   ●
Used in Combination for Image/Beam Displacement
   2) Application:
   ● Endoscopy
   ● Microscopy
   ●
Laser Alignment
   ● Medical Instrumentation

 

Penta Prisms - Deviation
   1) Function:
   ●  Deviate the Ray Path by 90°
   ●  Image is Right-Handed
   2) Application:
   ●
Visual Targeting
   Projection
   ●
Measurement
   ● Display Systems


 

> Half-Penta Prisms - Deviation
   
1) Function:
   
● Deviate the Ray Path by 45°
   
● Image is Right-Handed
   
2) Application:
   ● Pechan Erector Assemblies


 

> Amici Roof Prism - Deviation
  
1) Function:
 
● Deviate the Ray Path by 90°
  
● Image is Right-Handed
  
2) Application:
  
● Microscopes
  
● Telescope Eyepieces

> Schmidt Prisms - Deviation
   1) Function:
   
● Deviate the Ray Path by 45°
   
● Image is Right-Handed
   
2) Application:
   
● Stereo Microscopes
   
● Pechan Erector Assemblies

 

>Retroreflectors (Trihedral Prisms) - Deviation, Displacement
  
1) Function:
 
● Deviate the Ray Path by 180°
  
● Image is Left-Handed
 
● Reflects Any Beam Entering the Prism Face, Regardless of the Orientation of the Prism, Back onto Itself
  
2) Application:
  
● Interferometry
  
● Boresighting
  
● Rangefinding
  
● Laser Tracking
 
● Precision Alignment


 

> Wedge Prisms - Deviation, Rotation
   1) Function:
   
● Used Individually to Deviate a Laser Beam a Set Angle
   
● Combine Two to Create An Anamorphic Pair for Beam Shaping
   
2) Application:
   
● Beam Steering
   
● Tunable Lasers
   
● Anamorphic Imaging
   
● Forestry


 

> Rhomboid Prisms - Displacement
   
1) Function:
   
● Displace Optical Axis without Changing Handedness
   
● Direction Remains the Same (No Ray Deviation Occurs)
   
2) Application:
   
● Binoculars
   
● Rangefinders
    
● Laser Instrumentation

 

> Dove Prisms - Rotation
   
1) Function:
   
● Uncoated: Rotate an Image by Twice the Prism Rotation Angle
   
● Uncoated: Image is Left-Handed
   
● Coated: Reflect Any Beam Entering the Prism Face Back onto Itself
   
● Coated: Image is Right-Handed
   
2) Application:
   
● Interferometry
   
● Astronomy
   
● Pattern Recognition
   
● Imaging Behind Detectors or Around Corners

 

> Anamorphic Prism Pairs - Expansion
   
1) Function:
   
● Expand Incident Beam Diameter in One Dimension
   
● Ideal for Making Elliptical Beams Circular
   
2) Application:
   
● Laser Diode Beam Expanders
   
● HD Imaging Lenses


 

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