Infrared Sources for Gas Detection and Monitoring

Corporate Headquarters of the Leister Group, Switzerland About Axetris AG Axetris AG, a company of the Leister group, is serving OEM customers with micro technology based (MEMS) infrared light sources, laser gas sensors, mass flow sensors and controllers and micro-optical components used in industrial, process control, environmental, medical automotive and telecom applications. value, consistent high product quality and outstanding customer support. OEMs rely on Axetris as a competent and sub-system partner for a wide range of high-quality off-the shelf products as well as customer specific solutions...

Infrared Source Product Range Overview Axetris IR sources are micro-machined, electrically modulated thermal infrared emitters featuring true black body radiation characteristics, low power consumption, high emissivity and a long lifetime. The patented design is based on a resistive heating element integrated onto a thin dielectric membrane which is suspended on a micro-machined silicon structure. The sources are packaged in compact TO-39 cans and are available with protective cap or with reflector. They can be fitted either with Sapphire, CaF2 or BaF2 or Germanium windows. Axetris IR sources...

IR Source Product Range Article no. Article description Package type Window type 600.347 EMIRS200_T_40 / 53_0 TO-39 with protective cap none 600.451 EMIRS200_R_60 / 55_0 TO-39 with reflector none 600.411 EMIRS200_R_60 / 55_S TO-39 with reflector Sapphire 601.479 EMIRS200_R_60 / 55_BaF2 TO-39 with reflector BaF2 601.615 EMIRS200_R_60 / 55_CaF2 TO-39 with reflector CaF2 601.928 EMIRS200_R_60 / 55_GeART90 TO-39 with reflector Germanium AR coated Custom Custom Custom IR Source Product photo The IR source is available with other specific reflectors and a range of window materials shown on page 7....

Benefits True black body radiation (wavelength from 2 µm to 16 µm) Emission Spectrum vs. Wavelength Measured emission spectrum Black-body radiation Relative Emission 600 mW 550 °C 450 mW 456 °C 350 mW 366 °C 2 4 6 8 10 12 14 16 Wavelength [µm] Microscopic image of the MEMS chip packaged on a TO39 header (left). Temperature distribution of the heated membrane (right side). High emissivity A unique thin film process creates a pure black body structure with emissivity close to 1. Emissivity Emissivity vs. Wavelength Wavelength [µm] Black dendritic surface structure. Fast electrical modulation and...

High electrical input power to optical output efficiency The IR source has excellent electrical to optical conversion efficiency. Reasons are on one hand the black surface which guarantees maximized emissivity and on the other hand optimized heat flux. Membrane temperature vs. electrical power 750 650 T [ºC] 550 450 peak membrane temperature 350 250 recommended limit 150 50 300 400 500 600 700 800 P [mW] Efficiency optimization by heat flux simulation. Reliability of the MEMS structure The semiconductor MEMS manufacturing technology guarantees highly reliable quality of the IR sources. Adding...

Benefits of windows • • • • Spectral lowpass filter complements detector filter Eliminates background signal and improves S/N ratio Protection of the IR source in harsh environments No parasitic influence of the sample gas (for tightly sealed windows) Window Spectral Transmission 100 90 % Transmission 80 70 60 50 40 CaF 2 BaF 2 Sapphire GeART90 30 20 10 0 2 3 4 5 6 7 8 9 10 11 12 13 14 Wavelength [µm] IR source with reflector and window. Transmission curves for the different window types * Germanium anti-reflective coated with an average transmission above 90 %. Application Specific Design Options...

Infrared sources F60 / 11.2008 / 09.2012/Art. Nr. 602.286 www.axetris.com Contact Headquarters: Axetris AG, Switzerland Schwarzenbergstrasse 10 CH-6056 Kaegiswil Switzerland phone: +41 41 662 76 76 fax: +41 41 662 75 25 [email protected] www.axetris.com USA: Leister Technologies LLC 1275 Hamilton Parkway Itasca, IL 60143 United States phone: +1 630 760 1000 fax: +1 630 760 1001 [email protected] www.axetris.com Swiss Made Quality. Axetris is an ISO 9001 certified enterprise. China: Leister Technologies Ltd. Building 11, 155 Yuanke Road Xinzhuang Industry Park Shanghai 201109 PR China phone:...