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Quartz Tungsten-Halogen Lamp
Connects to Included
SM2T2 Lens Tube Coupler
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.
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Schematic of QTH10(/M) Lamp
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.
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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.
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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.
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.