Optical filters picture
Home / Products / Optical Filters

Optical Filters and Coated Filters

Overview about our optical filter components

Optical filters are used in optical systems to block, transmit, reflect or to filter out a specific wavelength range from a light source or a laser. This kind of optics are either dichroic, bandpass, longpass or shortpass thin film coatings, which mostly are designed and optimized for a limited range of incidence angles and wavelengths. Or they can be based on absorptive colored filter glasses, that have well-defined optical characteristics and which, to a large extent, operate independently from the incidence angle. Optical filters are used for machine vision, for lighting applications, in astronomy, in optical sensor systems, for scientific and research applications like fluorescence spectroscopy and fluorescence microscopy, for laser systems as well as for photography and CCD-camera chip adjustment. Please follow the links below for details and filter specifications:


Cemented filters that create a bandpass filter combinationnullspacerCoated filters


Optical Glass Filters made of original SCHOTT filter materials

More than 100 different high quality SCHOTT filter materials from stock, which represent an industry standard since many years. Our huge program of colored optical SCHOTT-filters includes shortpass-, longpass-, bandpass-, optical density-, conversion- and color filters for a wide field of application. All these filter materials are ground, polished and shaped to the desired form, dimension and thickness. The filters offer a high optical quality, so that even demanding optical applications can be based on these interesting materials. Optically cemented filter combinations that open up the possibility of filters with special characteristics even at smaller quantities and filter-sets are possible on demand. view more...


Neutral Density Filters, Grey Filters, OD-Filters

Our neutral density filters are made of SCHOTT NG 1, NG 3, NG 4, NG 9, NG 10, NG 11 or NG 12 material which are actually part of the color filter program from SCHOTT. Due to their unique properties, we think this filter category has deserved an own page in our website. The filters offer a well-defined and to a large extend color-neutral and uniform attenuation of light, achieved by absorption. The optical transmittance is adjusted by choosing the appropriate material and by polishing the filter materials to a specific thickness. view more...


Heat Reflection Filters (Heat Reflecting Hot Mirrors) SIR Series

The SIR is a coated, dichroic filter with a 100 % dielectric coating construction. The filters let the visible pass and reflect the near infrared band up to approximately 1100 nm very efficiently. They are frequently used to remove heat from lighting systems. But also eye-tracking applications and CCD-camera filters have succesfully been based on our SIR material. The rugged filter design allows the use at high operating temperatures. view more...


Heat Reflecting Filters with extended blocking range, SIR-IR Series

The SIR-IR works based on the the same principle as the SIR. But it offers a more broad-band infrared blocking range. At the same time the visible transmission and blocking aren't as efficient as they are for the SIR. So, the SIR-IR design presents the best possible compromise in regards to optical transmission and broadband heat blocking that can be achieved based on a dielectric coating. view more...


Cold Light Filters, (infrared transmitting mirrors), SHD-Series

The SHD is a dielectric, dichroic lighting filter coating with a high reflection for visible light and a high transmission up to 2500 nm. It is used to filter out a cold light beam by reflecting it by 45° and by transmitting the heat at 0° incidence. In some instances the mirror can be used as a laser beam combiner or as an economically priced high reflection laser mirror. view more...


Heat-Absorbing Filters KG1-KG5

KG heat-absorbing filters are made of SCHOTT-KG raw materials. The filter materials absorb infrared radiation (heat) and allow visible light to pass. Some KG-filters works as bandpasses, because they block deep UV-light. In contrary to dielectric coated components, heat-absorbing filters are designed to warm up during operation. They absorb the thermal energy which then can be removed from a system by cooling the filter itself. view more...



You are searching for optical filters not listed here or you need engineering support?

To request a custom filter coating or a cemented filter combination, please use our coating request form.
If you are in search of engineering support or additional information, please do not hesitate to contact us by e-mail.