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Application Specific:

Transmission Range:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Rejection Range:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Thickness:

Diameter:

Optical Density:

Transmission (%):

(%)

Filter Surface Quality:

Help with Circular Variable Filters specifications:

Application Specific
          Filter Application refers to the desired wavelength range for the lens. This wavelength range is mostly dependent upon the filter material.
   Your choices are...         
   Infrared (IR)       IR filters are designed for use in the 750 nm to 2500 nm wavelength range. 
   Visible (VIS)       VIS filters are designed for use in the 380 nm to 750 nm wavelength range. 
   Ultra-Violet (UV)       UV filters are designed for use in the 4 nm to 380 nm wavelength range. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Transmission Range:       The area of the spectrum where the filter transmits. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
   Rejection Range:       The area of the spectrum where the filter does not transmit. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
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Filter Geometry
   Thickness:       The thickness of the filter. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Diameter:       If the filter is circular, the diameter. If the filter is square, the length of a side. If the filter is rectangular, the length of its largest side. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Optical Density
   Optical Density:       Optical density is defined as the logarithm to the base ten of the ratio of the power of the incident beam to that of the exiting beam. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Transmission (%)
   Transmission (%):       As a beam of light passes through an absorbing medium, the amount of light absorbed is proportional to the intensity of incident light times absorption coefficient. Consequently the intensity of an incident beam drops exponentially as it passes through the absorber. The transmitted intensity, divided by the incident intensity, times 100, is the transmission %. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Filter Surface Quality
          Surface quality of the filter glass.
   Your choices are...         
   10-5 Scratch / Dig       A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 10 / 5 indicates the average diameter of the digs to be .05 mm and the average length of a scratch is .10 mm. 
   20-10 Scratch / Dig       A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 20 / 10 indicates the average diameter of the digs to be .10 mm and the average length of a scratch is .20 mm. 
   40-20 Scratch / Dig       A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 40 / 20 indicates the average diameter of the digs to be .20 mm and the average length of a scratch is .40 mm. 
   60-40 Scratch / Dig       A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 60 / 40 indicates the average diameter of the digs to be .40 mm and the average length of a scratch is .60 mm. 
   80-50 Scratch / Dig       A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 80 / 50 indicates the average diameter of the digs to be .50 mm and the average length of a scratch is .80 mm. 
   Other       Any other scratch / dig surface quality rating. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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