High-Power IR Emitters

  • Pulsable Thermal Near-Blackbody IR Sources
  • Available with Soldered Filter Windows
  • TO-8 Can Package
  • SM1-Threaded Mounting Adapter Available


2 - 16 µm, No Window


2 - 14 µm, BaF2 Window,
Winston Cone


2 - 6 µm, Al2O3 Window

Application Idea

HPIR104 High-Power IR Emitter Mounted in the HPIRM SM1-Threaded Mounting Adapter

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HPIR10x Output Power
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The typical output power for Thorlabs' High-Power IR Emitters. Additional performance details can be found on the Graphs tab.
Key Specificationsa
Item # HPIR101 HPIR102 HPIR103 HPIR104
2 - 16 µm 2 - 6 µm 2 - 14 µm 2 - 11 µm
Window N/A Soldered
Collimator N/A N/A Winston Cone
Gas Filling N/A N2
  • Complete specifications can be found on the Specs tab.


  • Pulsable Broadband Output
  • Near-Blackbody Emittance
  • Nanostructured Radiating Element
  • Available With or Without Soldered Windows
  • TO-8 Can Package
  • Externally SM1-Threaded (1.035"-40) Mounting Adapter Available

Thorlabs' High-Power IR Emitters are pulsable, thermal blackbody sources that feature a 40 mm2 emitter area and >0.9 emissivity over a broad spectral range. Each emitter features a free-standing monolithic radiating element, which offers improved efficiency as well as better mechanical stability and shock resistance compared to wound filaments. The radiating element is made of high-melting metal with a nanostructured surface that increases the optical emissivity. To achieve maximum efficiency, each emitter also includes an integrated reflector that directs the backside emitted radiation towards the front of the housing.

The emitters are available with open housings (HPIR101) or hermetically sealed with soldered windows made from sapphire (HPIR102), barium fluoride (HPIR103), or calcium fluoride (HPIR104). Versions with soldered windows are suitable for the measurement of flammable gases. The soldered windows are leak tested and offer improved long term stability compared to conventional glued windows. All sealed IR emitters are filled with nitrogen gas; please contact Tech Support for other gas fillings. The HPIR103 and HPIR104 models feature a Winston cone collimator, narrowing the emission angle of the emitted radiation.

Click to Enlarge

HPIR102 Bulb Mounted in HSLT2 Heatsink Lens Tube
with CaF2 Plano-Convex Lens Using HPIRM Mounting Adapter

The HPIRM Mounting Adapter has external SM1 (1.035"-40) threads that enable the HPIR bulbs to be integrated into our Ø1" Lens Tube Systems and SM1-Threaded Kinematic Mounts. The bulb is held in the HPIRM mount using an SM17RR Ø17 mm Retaining Ring (included), which can be tightened using our SPW801 Adjustable Spanner Wrench. The adapter can be installed in an SM1-threaded lens tube or mount using the SPW909 or SPW801 Spanner Wrenches.

Please note that the housing of the emitter will heat up during operation. Although operation without a heatsink is possible without damaging the emitter, we recommend using a suitable heatsink like the HSLT2 passive-heat-sink lens tube in combination with the HPIRM mounting adapter for long term operation. An example is depicted to the left.

Item # HPIR101 HPIR102 HPIR103 HPIR104
Wavelength Range 2 - 16 µm 2 - 6 µm 2 - 14 µm 2 - 11 µm
Radiating Element Emissivity >0.9
Modulation Deptha 70% at 2.5 Hz
Maximum Current 660 mA
Maximum Voltage (Typical) 3.8 V
Maximum Electrical Power (DC)b 2.5 W
Electrical Resistance (Typical) 5 - 6 Ω
Radiating Element Area (Emitter Size) 40 mm2
Housing Type TO-8
Window N/A Soldered Sapphire Soldered BaF2 Soldered CaF2
Collimator N/A N/A Winston Cone
Gas Filling N/A N2
Radiating Element Temperature (Typical) 630 °C
Operating Temperature (Non-Condensing) -25 °C to 85 °C
Storage Temperature -25 °C to 85 °C
Typical Lifetime >30 000 h
  • Square Wave Signal, 50% Duty Cycle
  • Do not exceed the maximum electrical power.
 HPIR10x Spectra
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Click for Raw Data
Each spectrum above is normalized to its peak and compared to the blackbody spectrum at the equivalent temperature.

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+1 Qty Docs Part Number - Universal Price Available
HPIR101 Support Documentation
HPIR101High-Power IR Emitter, 2 - 16 µm, No Window
HPIR102 Support Documentation
HPIR102High-Power IR Emitter, 2 - 6 µm, Al2O3 Window
HPIR103 Support Documentation
HPIR103High-Power IR Emitter, 2 - 14 µm, BaF2 Window, Winston Cone Collimator
HPIR104 Support Documentation
HPIR104High-Power IR Emitter, 2 - 11 µm, CaF2 Window, Winston Cone Collimator
HPIRM Support Documentation
HPIRMSM1-Threaded Mounting Adapter for High-Power IR Emitters