Quartz Tungsten-Halogen Lamp


  • Broadband Emission from Visible to NIR
  • SM2-Threaded Housing for Compatibility with Ø2" Lens Tubes
  • Post Mountable for Quick and Simple Integration

QTH10

QTH10B

Replacement Bulb

Connects to Included
Power Supply

Application Idea

SM2T2 Lens Tube Coupler
Attaching QTH10 Lamp to
LCFW5 Filter Wheel

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Features

  • Broadband Emission from 400 to 2200 nm
  • Internal SM2 (2.035"-40) Threads Compatible with Our Ø2" Lens Tubes
  • Bottom-Located 8-32 (M4) Tap for Ø1/2" Post Mounting
  • Adjustable Bulb Position for Optimizing Illumination Conditions
  • Includes Condenser Lens, SM2-Threaded End Cap, and Universal Power Supply
  • Replacement Bulbs Available

Thorlabs' Quartz Tungsten-Halogen Lamp is a versatile general-purpose light source for alignment, testing, and illumination needs. Packaged in a compact Ø2.20" (Ø55.9 mm) housing with a built-in heat sink, it contains internal SM2 (2.035"-40) threading on both sides for direct compatibility with our Ø2" lens tube accessories, as well as an 8-32 (M4) tap for use with our Ø1/2" posts.

With broadband emission in the visible and NIR spectral ranges, this incoherent light source is ideal for aligning a wide range of setups without introducing laser light. It can also be used in combination with a CCD Spectrometer to characterize lenses, filters, or other optical elements.

This white-light lamp ships ready for use with two externally SM2-threaded end caps and a condenser lens (Item # ACL5040U) that has been mounted in an internally-threaded SM2 housing using an SM2RR retaining ring. The front cap is knurled for easy removal by hand, while the back cap can be removed with a SPW909 or SPW801 spanner wrench (not included). A setscrew that accepts a 0.05" hex key (included) is exposed when the rear cap is removed, allowing the bulb's receptacle to be adjusted to maximize imaging quality and light collection without having to remove the condenser lens or other attached optics. The receptacle's vertical adjustment range is 0.15" (3.8 mm). To power the bulb, a universal power supply (90 - 264 VAC) with plugs for all regions is included. Replacement bulbs (Item # QTH10B) are available below.

Please note that the lamp should not be operated without the rear end cap and condenser lens, as the bulb's surface will be hot to the touch. After warming up, the heat sink will reach a temperature of 50 °C.

If your application would benefit from stabilized output power or a stabilized spectrum, we also offer a Benchtop Quartz Tungsten-Halogen Source as well as Compact Fiber-Coupled Broadband Light Sources. If a higher color temperature is desired, our color-balancing filters can be used to attenuate red light from the QTH10(/M) light source while passing blue light. This results in a beam with a higher color temperature and lower total power.

Specifications
Optical Output Powera 50 mW (Typical)
Bulb Type Quartz Tungsten-Halogen Bulbb
Color Temperature 2800 K (Typical)c
Lifetime 2000 Hours
Bulb Voltage 12 VDC
Bulb Power 10 W
Bulb Socket G4 2-Pin Baseb
Included Power Supply Input: 90 - 264 VAC, 50 - 60 Hz
Output: 12 VDC
Output Connector: 2.1 mm ID x 5.5 mm OD x 9.5 mm Long (Female)
  • Measured by focusing the output beam after the ACL5040U condenser lens onto a thermal power sensor with a Ø2", 90° protected silver off-axis parabolic mirror (6" reflected focal length).
  • We strongly recommend wearing gloves (such as our latex or cotton gloves) when replacing the bulb in order to prevent skin oils from being deposited on the glass. If you suspect the bulb is dirty, carefully clean it with alcohol before connecting to power.
  • Color temperature will vary from unit to unit.
Drawing of Lamp
Click for Details

Schematic of QTH10(/M) Lamp

Posted Comments:
Jeremy Hieulle  (posted 2022-10-11 15:10:25.9)
Dear staff of the ThorLabs, I am a researcher at the University of Luxembourg, We recently purchased the QTH10 halogen lamp, which we are currently using for light-induced material degradation study. We would be very grateful if it would be possible for you to provide us with the emission spectrum of this halogen lamp. This information would help us a lot in the analysis of our experimental data. Best regards, Jeremy Hieulle
jdelia  (posted 2023-07-19 09:29:20.0)
Thank you for contacting Thorlabs. You can request the spectrum for this light source by reaching out to your local tech support department. We have also reached out to you directly with the relevant graph.
Dilham Wahyudi  (posted 2022-06-23 18:40:39.5)
excuse me, may i know how long these QTH10/M lamp can operate continuous? because i would use this for image acquistion. thanks. hope to get the answer as soon as possible
jdelia  (posted 2022-06-24 10:54:58.0)
Thank you for contacting Thorlabs. We specify a lifetime of 2000 hours for this lamp.
JP Westenskow  (posted 2022-02-17 18:41:30.347)
Can you please send me the spectral output of the QTH10 - Thanks!
jgreschler  (posted 2022-02-18 11:35:37.0)
Thank you for reaching out to Thorlabs. Additional data can be requested by contacting techsupport@thorlabs.com. I have reached out to you directly with the graph.
Gemma Piquero  (posted 2021-09-13 06:02:41.993)
Good morning. Could you please provide me with the intensity vs. wavelength curve in this source? Thanking in advance. Best regards, Gemma
YLohia  (posted 2021-09-14 03:43:55.0)
Hello, thank you for contacting Thorlabs. The emission spectrum can be requested by emailing techsupport@thorlabs.com. The spectrum should resemble that of a black body due to it being a Quartz Tungsten-Halogen source. I will reach out to you directly with preliminary testing done on a QTH10 lamp.
Elsayed Zahran  (posted 2021-03-05 18:13:48.18)
Hello, I have the QTH10 as part of the Solarlab XM system. Can it be controlled by the DC2100? How can I install it into the ThorLabs optical bench? Thanks, Elsayed
YLohia  (posted 2021-03-12 04:02:45.0)
Hello, the QTH10 is not intended to be controlled via the DC2100. Please use the included 12 VDC power adapter for this lamp. You can mount the QTH10 on a standard optical breadboard with 1/4"-20 tapped holes using a 1/2" post holder (for eg, PH2), 1/2" post (for eg, TR2), SM2T2 (SM2 coupler), and LMR2 mount.
Serdar Okuyucu  (posted 2021-02-03 20:53:31.42)
Hello, I have the QTH10/M lamp which I would like to use for the calibration of a device response. Could you please provide the emission spectra of the QTH10/M? Thank you.
YLohia  (posted 2021-02-03 04:36:19.0)
Hello, thank you for contacting Thorlabs. The emission spectrum can be requested by emailing techsupport@thorlabs.com. The spectrum should resemble that of a black body due to it being a Quartz Tungsten-Halogen source. I will reach out to you directly with preliminary testing done on a QTH10 lamp.
user  (posted 2020-06-18 14:04:22.933)
Hello, Could you please provide me the emission spectra of the QTH10? Thank you
YLohia  (posted 2020-06-22 09:50:48.0)
Hello, thank you for contacting Thorlabs. We will reach out to you directly with this information.
Brian Wood  (posted 2020-05-08 15:21:55.193)
Hello, Can you provide me with the emission spectra of the QTH10 product? Also, can the installed lens be swapped for another one? Thank You
YLohia  (posted 2020-05-12 09:19:04.0)
Hello, thank you for contacting Thorlabs. The spectrum should resemble that of a black body due to it being a Quartz Tungsten-Halogen source. I will reach out to you directly with preliminary testing done on a QTH10 lamp. The included lens (ACL5040U) is mounted in an SM2 lens tube and is secured using the SM2RR retaining ring. This can be removed using the appropriate spanner wrench and replaced with another 2" OD optic.
Anjana Heva  (posted 2020-02-27 09:01:13.387)
Hello, I am looking for the emission spectrum of your quartz tungsten halogen lamp (QTH10) Thank you, Anjana Heva
llamb  (posted 2020-02-27 01:55:09.0)
Hello Anjana, I will reach out to you directly with this information.
JuanCarlos Martinez-Anton  (posted 2020-02-10 10:01:01.683)
I need to know if the QTH lamps have no UV-filter as typically found for illumination purposes. Although not high, I need the small UV portion spectrum and therefore a clean quartz envelope (without UV-filter) Can you help to solve this doubt? thanks!
llamb  (posted 2020-02-10 04:56:06.0)
Thank you for your feedback. The QTH10(/M) lamps do not feature any UV filters, just an uncoated B270 aspheric condenser lens, for which you can find a sample transmission spectrum here: https://www.thorlabs.com/images/TabImages/Uncoated_B270_Transmission_780.gif.
user  (posted 2020-02-07 04:21:03.613)
Dear Thorlabs team, I'm looking for the emission spectrum, could you provide me with such an information, please? thank you, regards, Anna
YLohia  (posted 2020-02-07 11:40:23.0)
Hello Anna, I have reached out to you with this information.
user  (posted 2019-05-07 06:04:17.817)
Hi, I am interested in your QTH10/M Quartz Tungsten-halogen Lamp so I can calibrate a spectrofluorometer. However, to do this I will need the bulbs original emission spectrum/Power irradiance spectrum, can you please provide this? Cheers, Callum J
YLohia  (posted 2019-05-07 11:27:40.0)
Hello Callum, I have reached out to you directly with this information.
josh josh  (posted 2019-04-24 05:46:22.857)
Buechtemann mentioned "The spectrum supplied via graph and Excel sheet has its maximum at 621 nm". However, I cannot seem to find a spectrum of this Quartz Tungsten-Halogen Lamp on the website.
YLohia  (posted 2019-04-24 09:37:52.0)
Hello, due to the previous feedback, we noticed a discrepancy between the expected spectrum and the spectrum we had on the website. We have removed that plot until we have completed further testing across various batches.
buechtemann  (posted 2018-04-09 11:36:21.217)
The Specs indicate a color temperature of 2800 K. This number implies a maximum . of the spectral radiance at app. 1000nm. On the other hand: The spectrum supplied via graph and Excel sheet has its maximum at 621 nm. This implies a color temperature of 4666 K. This is a vast dicrepancy. Please explain
llamb  (posted 2018-07-10 09:07:02.0)
Thank you for your feedback and for pointing out this discrepancy. We are looking to update the expected Spectrum after additional testing, as the current plot of the spectrum does not match the bulb's specs. The spectrum should resemble that of a black body due to it being a Quartz Tungsten-Halogen source. I will reach out to you directly with preliminary testing done on a QTH10 lamp.
user  (posted 2018-02-13 18:57:48.7)
Is there a switch on this lamp to turn it on/off or do you just unplug/plug the connector in to turn it off/on?
tfrisch  (posted 2018-03-22 02:53:00.0)
Hello, thank you for contacting Thorlabs. This lamp is controlled just by connecting it to its power supply.
sareggeti  (posted 2018-02-06 13:35:59.6)
Can this product be used as a blackbody calibration source as a 2800K temperature blackbody? Wavelengths of interest are 550nm and 650nm. With the stabilized tungsten light source (SLS201L), a plot of spectral power distribution compared to a true blackbody is provided. Is this data available for the QTH10 light source? Thanks for your help.
tfrisch  (posted 2018-03-22 02:44:28.0)
Hello, thank you for contacting Thorlabs. QTH10 does not have a feedback loop in order o stabilize the output, so if you need a blackbody source for calibration, it will not be suitable. Whether it would be suitable as an approximation would depend entirely on the tolerances of your application, but we would not be able to guarantee it against any NIST-traceable or similar standard. I will reach out to you directly to discuss your application.
daniel.o-connor  (posted 2017-12-05 13:52:19.2)
The manual safety section states the following: "Always wear eye protection when working with the lamp." Can you recommend what we should use for eye protection with this product?
nbayconich  (posted 2017-12-28 04:43:32.0)
Thank you for your feedback. For liability reasons, please verify all laser goggle selections with your local laser safety office who would have access to the complete specs of this light source and how it will be used in your application. IR blocking glasses will be most suitable for this type of light source. I will reach out to you directly about your application.
bekker  (posted 2016-02-18 15:55:50.837)
Dear Thorlabs, how reliable is the provided spectrum? I'm considering to use the lamp as an intensity calibration source for a CCD. The absolute amount of light power is not so interesting for me, the relative power versus wavelength should be known with a few percent precision though.
besembeson  (posted 2016-03-09 01:51:09.0)
Response from Bweh at Thorlabs USA: This can be used for such an application. I will follow-up with you regarding the percentage fluctuations of the relative intensity with wavelength. However, it seems to me your application might benefit from a broadband stabilized source instead like the ones at the following link: http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_ID=7269
napoleondor  (posted 2015-12-17 18:17:46.66)
Hello, I want to exact a connector type. I'd read in specification about strange inner diameter: "Output Connector: 1 mm ID x 5.5 mm OD x 9.5 mm Long (Female)". It seems that an inner diameter (1 mm) of this connector not corresponding picture of QTH10/M. What inner diameter is correct? Nikolay Brysin
besembeson  (posted 2015-12-21 03:06:02.0)
Response from Bweh at Thorlabs USA: Thanks for pointing that out. The power supply connector barrel plug is actually 2.1mm ID x 5.5mm OD x 9.5mm Long (female). We are going to correct this on our website please.

Below is a selection guide for all of our white-light, broadband light sources (or lamps). 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 Bulb
Electrical
Power
Color
Temperature
Bulb
Lifetime
Replacement
Bulb
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
OSL2 Quartz
Tungsten-Halogen
400 - 1600 nm
(Typical)
Fiber Bundle 1.4 Wi 150 W 3200 K 1000 hc OSL2Bf,
OSL2B2,
or OSL2BIR
OSL2IR Quartz
Tungsten-Halogen
400 - 1750 nm
(Typical)
Fiber Bundle 3.8 Wi 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 Kj (Typ.) 2000 h QTH10B
SLS202L(/M) Tungsten 450 nm - 5.5 µm Free Spacee or
Fiber Coupled (SMA)
700 mWa
1.5 mWk
7.2 W 1900 K 10 000 h SLS252
SLS203L(/M) Silicon Carbide Globar 500 nm - 9 µm Free Space >1.5 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
  • Free-space optical power measured without adapters at the beginning of bulb lifetime.
  • Measured with Thorlabs' M114L01 solarization-resistant patch cable at beginning of bulb lifetime.
  • Operation time before the maximum optical output power of the bulb reaches 50% of its original output.
  • Measured with Thorlabs' M111L01 solarization-resistant patch cable at beginning of bulb lifetime.
  • Adapters are available separately to couple the free-space output into liquid light guides (LLGs).
  • This bulb is identical to the original bulb that comes with the light source.
  • Operation time before the controller cannot stabilize the output power of the bulb.
  • Fiber-coupled optical power, measured with included fiber patch cable at beginning of bulb lifetime.
  • Power at Fiber Tip at Maximum Bulb Intensity
  • Color temperature will vary from unit to unit.
  • Measured with Thorlabs' MZ41L1 ZrF4 mid-IR patch cable at the beginning of bulb lifetime.
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Quartz Tungsten-Halogen Lamp

Beam Profile of Lamp Output
Click to Enlarge

These photos were taken by orienting a gray piece of cardboard perpendicular (left) and parallel (right) to the beam. Note that the beam characteristics shown here are typical and will vary from unit to unit.

Click to Enlarge

Power Supply and Adapters Included

The QTH10(/M) Quartz Tungsten-Halogen Lamp offers broadband emission (400 - 2200 nm) with a typical optical output power of 50 mW. The included universal power supply comes with common international plug adapters and accepts 90 - 264 VAC, 50 - 60 Hz input voltages.

This lamp is not intended for use in household illumination applications.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
QTH10 Support Documentation
QTH10Customer Inspired! Quartz Tungsten-Halogen Lamp, 8-32 Tap
$196.00
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+1 Qty Docs Part Number - Metric Price Available
QTH10/M Support Documentation
QTH10/MCustomer Inspired! Quartz Tungsten-Halogen Lamp, M4 Tap
$196.00
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Replacement Bulb

The QTH10B is a replacement light bulb for the QTH10(/M) Quartz Tungsten-Halogen Lamp. Please see Section 3.4 of the QTH10(/M) instruction manual for installation instructions. For the best imaging quality, the filament should be oriented perpendicular to the optical axis. We strongly recommend the use of gloves (such as latex or cotton gloves) when replacing the bulb in order to prevent skin oils from being deposited on the glass.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
QTH10B Support Documentation
QTH10BReplacement Bulb for QTH10 and QTH10/M
$11.89
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Last Edited: Nov 21, 2013 Author: Dan Daranciang