a wide spectrum of optical filters

Functions of shortpass filters

• Blocks longwave light down to cut-off wavelength
• Transmits visible light (and UV)

Applications of shortpass filter

• Block unwanted heat from light source or sun
• Security
• 3D Measurement
• Combustion chamber monitoring in cement, glass or steel production

Typical specifications

• Transmission > 90 %
• Blocking ~ OD 3 
• Not sensitive to AOI

Functions of longpass filters

• Transmit longer wavelength
• Absorb shorter wavelength, e.g. Block UV + Visible light,
• Transmit IR light
• Enhance color effects of opposite color 

Applications of longpass filters 

• Food inspection
• Traffic
• 3D Measurement
• Medical 

Typical specifications

• Transmission > 90 %
• Blocking ~ OD 3

Function of narrow bandpass filters

• Block all wavelength outside a selected interval

Application of narrow bandpass filters

• Spectroscopy
• Block or Select an illumination light source (LED or Laser)
• Bioanalytics
• Traffic
• 3D Measurement
• Medical

Typical Specifications

• Transmission > 90 %
• Blocking ~ OD 3

Function of neutral density filters

• Reduction of light intensity

Application of neutral density filters

• Reduce the light intensitiy to avoid camera over exposure without affecting depth of field and diffraction limitations by not stopping down the iris    
• Bright Scenes: Combustion chamber monitoring in glass or steel production
• 3D Measurement

Typical specifications

• Low reflection
• With nearly constant absorption in VIS
• Insensitive to AOI

Function of polarizer filters

• Light is blocked if the orientation is orthogonal to the polarizer
• Reflected light is partially polarized (depending on material and reflective angle) and can be eliminated from the picture if the right orientation of polarizer is found

Application of polarizer filters

• Suppress or Reduce reflection
• Traffic
• Security
• Quality control and Inspection in Food and Beverage
• Filling and/ or packaging
• 3D Projection