The CVI Laser Optics suite of optical filters includes everything you need to control the wavelength or intensity of light in your system. Drawing on a combination of color glass, metallic films, and dielectric coatings, we offer almost one thousand filters to allow you to balance price and performance within your application for a perfect fit. Our bandpass, edge, and notch filters can be used to precisely select specific wavelengths, from one to hundreds of nanometers. Our neutral density filters can attenuate a single laser wavelength, or a broad range of wavelengths uniformly.
Calibration, color-balancing filter glass, and heat-absorbing filters round out the product line. With specifications like > 93% average transmission, OD 6 out of band blocking, and high laser damage threshold, we have the right filter for your most demanding laser applications.
We offer multiple filter technologies for many of our filter types, ranging from basic performance to premium filters with superior optical performance and durability. Each technology meets a specific combination of needs for spectral profile, durability, and cost. Schott color glass filters are the most economical solution for bandpass, longpass, heat-absorbing, and neutral density filter applications, but are limited in their power handling and available spectral shapes. Metallic coatings like Iconel® offer superior attenuation with wavelength when used as neutral density filters, with intermediate power handling. Dielectric filters are used for almost every filter type, as they offer the most precise spectral control and improved power handling. We use a combination of hard, semi-hard, and soft coating techniques in the manufacture of our basic interference filter line (F), as well as for our standard longpass and shortpass filters (LWP, SWP).
The ion beam sputtering deposition used to create the Semrock filters allows us to achieve our most impressive spectral profiles. These filters possess superior transmission and durability together with exceptionally high out of band blocking that is both deep and wide. Ultrasteep edges, angle tuning, polarization control, deep notches, and passbands with guaranteed transmission are just some of the other features this technology can offer.
Working with light requires not only controlling its wavelength, but also its intensity. Our lineup of neutral density filters includes absorptive, metallic coated, and dielectric coated attenuators for use at lower power over broad wavelength ranges, and at a single high power laser wavelength. We also offer sets of spectrophotometer calibration filters with precise blocking at known wavelengths.
In addition to the incredible variety of filters available from stock, many more can be provided on a quick-turn, semi-custom basis. Custom options are available for center or edge wavelength, transmission passband, and optical blocking. Almost all of our filters can be custom-sized on quick turn to create a filter that perfectly matches your needs.