Our IR Filters are deposited by sputtering, using our ‘Rockard’ © technology, traditionally thermal evaporation has been used for IR filters. Our technology ensures the following:

  • Highly durable coatings suitable for the toughest environments.
  • Extremely low temperature shift.
  • Reduced passband ripple for an even response.
  • High blocking efficiency to increase signal to noise ratio.

A brief overview of IR Filter deposition technology is outlined below. Sputter deposition has a process energy approximately 3x that of thermal evaporation, this is responsible for the densely packed structure. This structure leads to superior environmental properties as outlined above.

Look out for the Rockard Logo on products featuring our specialist technology.