Semrock offers the most spectrally sophisticated optical filters on the market to drive significant improvements for our customers and their applications, such as faster measurement times, reduced downtime, repeatable manufacturing, and lower optical component count. Semrock was founded in 2000 based on a critical breakthrough in ion-beam sputtering technology that allowed the use of hard dielectric coatings on a single glass substrate. Since that time, more than half a million thin-film interference filters have been sold and we remain at the forefront for optical filter technology for biotechnology and analytical instrumentation applications.