Low Temperature Shift IR Bandpass Filters

Source: Deposition Sciences, Inc. (DSI)

Low Temperature Shift IR Bandpass Filters

Low Temperature Shift Infrared (IR) Bandpass Filters from Deposition Sciences, Inc. (DSI), manufacturer of highly durable thin film optical coatings, are ideal for critical applications that require minimal fluctuation in center wavelength (CWL). Infrared coatings experience a shift in spectral placement with changes in temperature but DSI’s “Low Temperature Shift” IR coatings shift approximately half the amount of “Standard” IR coatings. Filter characteristics, such as bandwidth, center wavelength, slopes, blocking level, and more, can be customized depending upon application requirements. The new infrared coatings are ideal in environments where it is impractical to actively heat or cool to maintain temperature stability, for example analytical instruments used for anesthesia monitoring, gas-sensing, and chemical analysis.

Standard Infrared coatings experience a shift in spectral placement with changes in temperature, for example, a relative center wavelength (CWL) shift of 100 ppm / ˚C is common for narrow bandpass (NBP) filters in the 3 to 18μm wavelength region.

Cutting the spectral shift due to center wavelength nearly in half, DSI’s Low Temperature Shift IR Bandpass Filters are ideal for use in instruments employing analytical techniques that cannot tolerate fluctuations in CWL, but are used in environments where active heating or cooling to maintain temperature stability is not practical. Examples include:

• Anesthesia Monitoring

• Gas Sensing

• Chemical Analysis

About Deposition Sciences, Inc. (DSI)
Deposition Sciences, Inc. (DSI) For over 25 years, Deposition Sciences has produced the most durable optical thin film filter coatings in the industry.  DSI’s coating capability ranges from the ultraviolet (UV), through the visible and includes near-infrared (NIR), midwave-infrared (MWIR) and out to the longwave-infrared (LWIR).  At the heart of these capabilities is DSI’s patented MicroDyn reactive sputtering technology enabling superior multilayer thin film coatings for optics and other thin film technologies. For more information, visit