The following are in thermal IR emitters emitters (in contrast to diode lasers) understood.
The offer by LASER COMPONENTS comprises reflector of manufacturers CAL Sensors and Intex. All the IR emitters are in TO-supplied housing. IR - emitters are here by user often in competition with special very cheap micro-bulbs. Up to a wavelength of about 4.5 microns special lamps often provide a fairly good level of radiation at higher wavelengths is the use of IR emitters mandatory. It may, however, for 2 reasons even below 4.5 microns to make sense to specific IR emitter should be addressed: To have an IR emitter mechanically robust, and, secondly, there are models that allow electric pulses are very good (sometimes up to 100 Hz).
Emitter of CAL-sensor
The emitters of CAL-sensor (CAL-source) are based on metal alloys. These are either a spiral (SA Series) DC version for unpulsed operation or as a metal ribbon (SVF series, design for pulsed operation), one pair of parabolic mirrors as standard. Used will be a robust and widely proven technology, are possible when no further improvements. The maximum temperature is 730 ° C.
SPF Series
The SPF series of CAL has been introduced to achieve higher speed. A modulation level of 50% is achieved in the new design at about 180 Hz. The lamp with the maximum temperature of 1000 K are available in TO-5 package with an integrated reflector and sapphire windows.
SF Series
The SF series was cheaper than blackbody emitters for applications in the NIR and IR developed area. An ultrathin Metallfolienfilament with an emissivity of 0.88 provides a radiation, which comes close to that of a black body.
Emitter by Intex
The IR emitter by Intex are based on the other hand, relatively modern technologies. It is structured around micromechanically hotplates. On a one carbon-silica nanocomposite membrane (amorphous diamond) as a resistance material is deposited, which has a very low temperature coefficient of resistance, and high emissivity. Special advantages: Due to the short thermal Zeitkostante can be reached at 100 Hz modulation frequency is still a modulation depth of 50%. Because of the constant resistance is observed no Einschaltstromimpuls. The radiator is location and dimensionally stable. At the maximum temperature of 750 ° C (10 Hz, 50% duty cycle) a lifespan of 10,000 hours at 600 ° C. for about 25,000 hours. The core competence of Intex is the special carbon coating. The developers certainly still see room for improvement on maximum temperature and lamp life.
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