Globar IR Light Source
![](https://www.thorlabs.us/Images/GuideImages/13022_BenchtopGlobar_1.jpg)
- >4.5 W Power Light Source with 550 nm - 15 µm Output
- Stabilized Color Temperature and Output Power
- Long Emitter Lifespan: 5000 Hours (Average)
Controller Included
SLS303
Stabilized Globar Light Source,
550 nm - 15 µm, 4.5 W Output
SLS303B
Replacement Globar
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Key Specificationsa | |
---|---|
Item # | SLS303 |
Emitter Type | Stabilized Silicon Nitride Globar |
Wavelength Range | 550 nm - 15 µm |
Color Temperature | 1200 K |
Output Optical Power | 4.5 W |
Output Beam Diameter | 50 mm |
Output Power Stabilityb | 0.05% |
Optical Drift per Hour (Typical) | 0.01% |
Optical Power Drift per °C (Typical) | 0.2% |
Emitter Electrical Power | 70 W |
Emitter Lifespan (Average) | 5000 Hoursc |
![Filter Holder Attached to Benchtop Light Source](https://www.thorlabs.us/images/TabImages/Stabilized_HP_Lamp_LCP05A_A1–200.jpg)
Click to Enlarge
Benchtop Light Source with
60 mm Cage System and
LCP05A(/M) Filter Mount with
Color-Balancing Filter
Features
- Silicon Nitride Globar with 550 nm - 15 µm Output
- Collimated Output for Free-Space Applications
- Internally SM2-Threaded Aperture
- Four 4-40 Threaded Holes for 60 mm Cage System at Front Output
Thorlabs' SLS303 Silicon Nitride Globar Light Source provides stable, high-power IR and MIR illumination. This source features an internal feedback system to provide highly stable output power (0.05% fluctuation). Since the blackbody spectrum of this source a wide spectral range, this source is ideal for integration into optical measurement equipment, such as back illumination for a test target as part of a detector calibration system.
![](https://www.thorlabs.us/images/tabimages/Stabilized_HP_Lamp_A4-200.jpg)
Click to Enlarge
Collimated Output
Each SLS303 source includes a lens to collimate the high-power, broadband output into a Ø50 mm beam for free-space applications. For convenience, the position of the collimation lens is factory set; however, it is also user-adjustable should slight tweaks to the collimation be necessary. For additional mechanical stability, the feet are removable, allowing the source to be bolted directly to any standard imperial or metric optical table with user supplied 1/4"-20 or M6 screws, respectively. The front face features four 4-40 taps (as shown in the image above) for 60 mm cage rods, making this device compatible with Thorlabs' 60 mm cage system. Using the cage system, it is possible to incorporate various optic mounts that are centered along the optical center of the collimated beam.
A replacement Globar is available below. Please see the Globar Replacement tab for detailed instructions.
If a higher color temperature is desired, our color-balancing filters can be used to attenuate red light from a light source while passing blue light. This results in a beam with a higher color temperature and lower total power.
Item # | SLS303 |
---|---|
Emitter Type | Silicon Nitride Globar |
Wavelength Range | 550 nm - 15 µm |
Color Temperature | 1200 K |
Output Optical Power | 4.5 W |
Typical Spectral Output | 0.1 W (400 - 700 nm) 4.4 W (700 - 15 000 nm) |
Optical Power Stabilitya | 0.05% |
Optical Drift per Hour (Typical) | 0.01% |
Optical Power Drift per °C (Typical) | 0.2% |
Output Beam Diameter | 50 mm |
Emitter Electrical Power | 70 W |
Lamp Housing Dimensions (L x W x H) |
213.7 mm x 217.0 mm x 261.2 mm (8.41" x 8.54" x 10.28") |
Controller Dimensions (L x W xH) |
299.9 mm x 149.8 mm x 80.2 mm (11.81" x 5.90" x 3.16") |
Emitter Lifespan (Average) | 5000 Hoursb |
Operating Temperature | 0 °C to 35 °C |
Storage Temperature | -15 °C to 70 °C |
SLS303B Globar Specifications | |
---|---|
Wavelength Range | 550 nm - 15 µm |
Emitter Type | Silicon Nitride Globar |
Color Temperature | 1200 K |
Globar Electrical Power | 70 W |
Emitter Dimensions (Typical) | Ø4.5 mm x 17 mm |
Lifespan (Average) | 5000 Hours |
Operating Voltage | 12 V |
![Stabilized Light Source Stability](https://www.thorlabs.us/images/TabImages/SLS303_Stability_450.gif)
Click to Enlarge
The power output and temperature of an SLS303 light source were measured over 55 hours of continuous operation. The source was run for 60 minutes to warm up and stabilize before this data was taken. The temperature was held at 25 ± 2 °C.
![Stabilized Quartz-Tungsten-Halogen Light Source](https://www.thorlabs.us/images/tabimages/SLS303_Spectrum_450.gif)
Click to Enlarge
Click for Raw Data
The measured spectral power distribution for the SLS303 light source compared to a 1200 K black body. The measured data does not extend beyond 5.6 µm due to spectrometer limitations.
Globar Handling
The Globar emitter used in the SLS303 light source operates at a very high temperature. If handled incorrectly, it will become a serious hazard to users and could potentially cause severe injury. It is critical to follow safety instructions when handling it.
The guidelines below describe safe Globar emitter handling.
- Never bump, drop, apply excessive stress, or scratch the emitter.
- Always transport the emitter in the provided protective case or cover until installation.
- Save the protective case or cover and packaging materials (box) for emitters that have been used to their rated service life.
- Clean any dirt, oil, or lint away from the emitter with alcohol and a lint free cloth or tissue.
- Always wear gloves when handling the lamp; never hold the lamp by its envelope. Thorlabs offer gloves that can be used for lamp handling.
- The emitter generates very high-intensity light output; never stare directly into the lamp.
- The emitter gets very hot during operation. Always wait at least 30 minutes after operation for the lamp to cool down before handling.
- Electrostatic discharge (ESD) protection is recommended when handling the emitter.
Globar Replacement
The installation instructions and videos below detail the recommended procedure for replacing the Globar emitter in our SLS303 Globar Light Source. Do not attempt to change the emitter while the emitter or lamp housing are hot. Allow at least 30 minutes after turning the light source off before attempting to replace the emitter.
We strongly recommend wearing gloves when replacing the emitter to prevent skin oils from being deposited onto the lamp. If you suspect the emitter is dirty, carefully clean it with alcohol before connecting it to a power supply.
Please note that the Globar modules should only be handled with protective gloves.
Open the Lamp Housing
- Using a 4 mm hex key, remove the screws on the side plate. An engraving on the top of the unit indicates which side plate to remove.
Remove the Old Globar Module
- Undo the orange clips holding the Globar wires in place.
- Using a 2 mm hex key, loosen the setscrew on top of the Globar module and remove the screw on the side by turning them counterclockwise.
- Remove the old module from the socket.
Install the New Module
- Route the yellow wires and insert the new module into the socket.
- Insert the wires into their sockets and engage the orange clips.
- Insert the side screw and then retighten the top setscrew to secure the module.
- Replace the side panel and secure with the four M5 cap screws.
SLS303 Connectors
![Connector Diagram](https://www.thorlabs.us/images/TabImages/10-Pin_SLS301_Connector_D1-200.gif)
10-Pin Female Connector | |||
---|---|---|---|
Pin | Connection | Pin | Connection |
1 | Bulb Ground | 6 | Ground |
2 | Bulb +12 V | 7 | Ground |
3 | Ground | 8 | +12 V |
4 | Monitor PD Signal | 9 | Signal Ground |
5 | Signal Ground | 10 | Ground |
Analog Output, 0 to 5 V
Posted Comments: | |
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Below is a selection guide for all of our white-light, broadband, lamp-based light sources. In addition to these sources, Thorlabs also offers unmounted white-light LEDs, white-light mounted LEDs, white-light fiber-coupled LEDs, and high-powered, white-light Solis® LEDs.
Broadband Light Source Selection Guide | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Item # | (Click to Enlarge; Not to Scale) |
Emitter Type | Wavelength Range (Click for Plot) |
Output Coupling | Output Power | Lamp Electrical Power |
Color Temperature |
Lamp Lifetime |
Replacement Lamp |
|
SLS204 | ![]() |
Deuterium | 200 - 700 nm | Free Space or Fiber Coupled (SMA) |
2 mWa 0.1 mWb (Typ.) |
30 W | N/A | 2000 hc | SLS254B | |
SLS205 | ![]() |
Xenon Arc | 240 - 1200 nm | Free Space or Fiber Coupled (SMA) |
290 mWa 5 mWd (Typ.) |
75 W | 5800 Ka 5400 Kd |
2000 hc | SLS255B | |
SLS401 | ![]() |
Xenon Arc | 240 - 2400 nm | Free Spacee | >1.3 Wa | 150 W | 5800 K | 2000 hc | SLS401Bf or SLS402B |
|
SLS402 | ![]() |
Mercury-Xenon Arc | 240 - 2400 nm | Free Spacee | >1.3 Wa | 150 W | 6000 K | 2000 hc | SLS401B or SLS402Bf |
|
SLS302 | ![]() |
Quartz Tungsten-Halogen |
360 - 2500 nm | Free Spacee | >10 Wa | 150 W | 3400 K | 1000 hg | SLS301B | |
SLS201L(/M) | ![]() |
Quartz Tungsten-Halogen |
360 - 2600 nm | Free Spacee or Fiber Coupled (SMA) |
500 mWa 10 mWh |
9 W | 2796 K | 10 000 h | SLS251 | |
SLS301 | ![]() |
Quartz Tungsten-Halogen |
360 - 3800 nm | Free Spacee | >1.6 Wa | 150 W | 3400 K | 1000 hg | SLS301B | |
SLS603 | ![]() |
Xenon Arc | 380 - 780 nm | Ø3 mm Liquid Light Guide |
>7 Wh | 300 W | 6000 Ki | 1000 hc | SLS600B | |
SLS605 | ![]() |
Xenon Arc | 380 - 780 nm | Ø5 mm Liquid Light Guide |
>15 Wh | 300 W | 6000 Ki | 1000 hc | SLS600B | |
OSL2 | ![]() |
Tungsten-Halogen | 400 - 1600 nm (Typical) |
Fiber Bundle | 1.4 Wk | 150 W | 3200 K | 1000 hc | OSL2Bf, OSL2B2, or OSL2BIR |
|
OSL2IR | ![]() |
Tungsten-Halogen | 400 - 1750 nm (Typical) |
Fiber Bundle | 3.8 Wk | 150 W | 3200 K | 200 hc | OSL2B, OSL2B2, or OSL2BIRf |
|
QTH10(/M) | ![]() |
Quartz Tungsten-Halogen |
400 - 2200 nm | Free Space | 50 mW (Typ.) | 10 W | 2800 Kl (Typ.) | 2000 h | QTH10B | |
SLS203F(/M) | ![]() |
Silicon Carbide Globar | 500 nm - 9 µm | Free Spacee or Fiber Coupled (SMA) |
1.8 Wa | 24 W | 1500 K | 10 000 h | SLS253 | |
SLS303 | ![]() |
Silicon Nitride Globar | 550 nm - 15 µm | Free Space | 4.5 Wa | 70 W | 1200 K | 5000 hg | SLS303B |
![Back to Top Back to Top](https://www.thorlabs.us/images/arrow_Vert.gif)
![Globar Lamp Spectrum](https://www.thorlabs.us/images/tabimages/SLS303_Spectrum_300.gif)
Click to Enlarge
Click for Raw Data
The measured spectral power distribution for the SLS303 Light Source compared to a 1200 K black body. The measured data does not extend beyond 5.6 µm due to spectrometer limitations.
![Globar Arc Lamp Power Supply](https://www.thorlabs.us/images/tabimages/Globar_Lamp_Controller_A1-150.jpg)
Click to Enlarge
SLS303 75 W Controller
![Globar MIR Lamp](https://www.thorlabs.us/images/tabimages/Globar_Lamp_Internal_A1-150.jpg)
Click to Enlarge
The Globar module has an integrated aluminum reflector that focuses light radiated by the Globar towards the front aperture.
- Globar Source for 550 nm - 15 µm
- 4.5 W Output Power Collimated in a Ø50 mm Beam
- Low Power Fluctuations of <0.05% within 1 Hour
- Optical Drift: 0.01% per Hour / 0.2% per °C
- 60 mm Cage System Compatible
- Manual Shutter
Thorlabs' SLS303 Silicon Nitride Globar Light Source is designed to provide 4.5 W of free-space illumination over the 550 nm - 15 µm range. An internal feedback system is employed to achieve a highly stable power output (0.05% fluctuation). The high-power output is collimated into a Ø50 mm beam for free-space applications. An aluminum reflector collects light from the silicon nitride Globar element and reflects it towards the front of the housing in order to maximize the output power. The mirror alignment is factory set to maximize the output, but it can also be adjusted by the user using the three adjustment knobs on the back of the housing.
The light source is shipped with a factory-installed, uncoated zinc selenide (ZnSe) collimation lens. The lens tube of the collimation lens features internal SM2 (2.035"-40) threading for easy integration of SM2-threaded parts. Please note that the SLS303 should not be used with our liquid light guides due to the MIR radiation. A knob on the front of the lamp housing allows a manual shutter to block the output if desired. The front face of the lamp housing can also integrate a 60 mm cage system.
The included controller, pictured to the upper right, has three LED indicator lights for temperature, Globar emitter status, and lifespan. During normal operation, all three will be green. If the controller becomes overheated, the "Temperature" indicator will switch to red and the light source will be automatically shut off. The "Lamp Status" indicator will show green if the correct Globar emitter is installed in the SLS303, or red if no emitter is present or if the wrong emitter is installed. The "Lifespan" indicator shows yellow once the emitter reaches 75% of its lifespan and red once it reaches 100%.
The large box design of the lamp housing allows for the safe dissipation of thermal energy produced by the 70 W Globar. When used for an extensive amount of time, the housing can heat up to ~60 °C, so extensive contact should be avoided. Replacement Globars are sold below.
![Back to Top Back to Top](https://www.thorlabs.us/images/arrow_Vert.gif)
- Replacement Silicon Nitride Globar for SLS303 Stabilized Light Source
- Electrical Power: 70 W
- Color Temperature: 1200 K (Click for Spectrum)
The SLS303B replacement Globar module is compatible with the SLS303 stabilized light source. Please see the Globar Replacement tab for detailed instructions.
Note: We strongly recommend wearing gloves when replacing the emitters in our light sources to prevent skin oils from being deposited onto them. If you suspect the emitter is dirty, carefully clean it with alcohol before connecting it to a power supply.