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Home  -  Optical Filters

Optical Filters

Following is a short review of Optical filters specifications to assist you in formulating requirements for your particular application. 


Center wavelength
Center wavelength (CWL) is the arithmetic mean of the pass band expressed in nanometers. For example, a HeNe Laser would have a center wavelength of 632.8nm.

Center Wavelength tolerance: ± FWHM 


Percent Transmission 
Percent transmission is the amount of power received by the detector compared to the total power received. Or Percentage of light pass in particular Wavelength 

Bandpass 
It is the width of the pass band, measured in nm, at the half-power points of the pass band. It is often expressed as Full Width at Half maximum (FWHM). Tolerance: ±20% of FWHM. Bandpass shape It can vary from triangular to nearly square. The number of cavities in a filter describes the overall spectral shape. 

Out-of-band rejection
out-of-band rejection (Blocking), is the amount of the energy , outside the filter pass band, transmitted through the filter. it is often expressed as an absolute level. For example 10-4 , means transmission outside the pass band is 0.01% , Unit: Optical Density (O.D.). 

Filter Dimension
Filter dimension are specified in inches or millimeter along with tolerance. Surface Quality: 80-50 scratch-dig.

Please Give Following information while sending the Order or Enquiry :

Center Wavelength: ?
FWHM : ? 
Percent Transmission :?
Size: in Diameter :?
Thickness:?

OPTICA ' s filter are designed for operation at 23 degrees Celsius, these filters can be used throughout the temperature range of -50 to +100 degrees Celsius as long as thermal shock is avoided.

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Discover the Products in Optical Filters

Find all the product specification in downloadable PDF Format for easy reference.

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Optical Filters -

  • Colour Glass Filters
    Color Glass Filters
    Color Glass Filters
  • DSC 4295 1
    Interference Filters
    Interference Filters
  • Cold Mirror Graph
    Cold Mirror (Heat Transmission Filter)
    Cold Mirror (Heat Transmission Filter)
  • Dichroic Filters
    Dichroic Filters
    Dichroic Filters
  • UV Transmission Filters
    UV Transmission Filter
    UV Transmission Filter
  • IR Cut Filter
    IR Cut-Off Filter (Dichroic)
    IR Cut-Off Filter (Dichroic)

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Optics & Allied Engg. Pvt. Ltd.

#9Q, 1st Phase, Jigani Link Road,  Bommasandra Industrial Area,
 Bangalore-560099, Karnataka, India,
Phone: +91-80-4113 4421
Cell Ph: +91-9886711327
www.opticsindia.com  www.opticaindia.com 
CIN: U33203KA1997PTC022830 

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