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Click here to download emission spectrum data

Features

• Output Spectrum: 400 - 700 nm
• Broadband Light Source Coupled to a Liquid Light Guide (LLG)
  • HPLS243 Includes 3 mm Core Diameter, 1.2 m (4') Long LLG (LLG0338-4)
  • HPLS245 Includes 5 mm Core Diameter, 1.2 m (4') Long LLG (LLG0538-4)
• Color Rendering Index (CRI): 94*
• Dimming Range: 30 - 100%
• Five Times Longer Lifetime than Conventional Xenon Lamps (>10,000 Hours**)
• USB 2.0 Connection and Control Software Included
• Power Supply is Included

Thorlabs' high-power, solid-state, plasma light sources (LIFI®) combine the best features of solid-stage electronics and full spectrum plasma emitters. These light sources use a dielectric resonant cavity to efficiently couple power from a solid-state power amplifier through a high-intensity discharge vessel and into the included Liquid Light Guide. The results are a long life (>10,000 hours**, or five times longer than a conventional arc lamp) and a complete color spectrum, making this source ideal for applications such as endoscopy, microscopy, and other medical lighting and inspection applications. This unit also offers many additional features including a USB 2.0 control interface and intensity dimming.

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The compact design of the HPLS200 series incorporates a plasma lamp, lamp assembly, and universal (85 - 264 VAC) power supply in one enclosure. The display, controls, and power switch are located on the front of the unit. Lamp ON and intensity can be controlled from the front panel, as well as with the control software. The USB interface, AC cord, and liquid light guide (LLG) mount are located in the rear of the unit. This long-lived plasma lamp is not replaceable by the user; please contact Tech Support for a replacement quote.

The output port of these solid state plasma light sources is equipped with a mount that accepts the included Thorlabs' Ø3 mm or Ø5 mm LLG. The light source design enables airflow and monitoring of the LLG tip temperature, which prevents overheating. To further protect the LLG, a hot mirror is placed just before the LLG tip. A safety system prevents lamp operation if an LLG is not attached.

For applications that would benefit from a free-space output, Thorlabs offers LIFI-based plasma lamps with free-space emission.

A new version of the firmware for the HPLS light sources is available for download. Please see the Software Downloads tab for details.

*Prior to LLG
**The lifetime of >10,000 hours is rated as the time when intensity reaches 50% of the original output.

Emission Spectrum

Click here to download emission spectrum data

Short-Term Intensity Stability Plot

Spectral Stability

These curves were obtained by subtracting a starting reference spectrum from the light source spectra measured at various times after startup. To view a stability curve for a specific time, click on the corresponding line in the legend below.

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Line*	Elapsed Time
	0.25 hr
	0.5 hr
	0.75 hr
	1 hr
	2 hrs
	3 hrs
	4 hrs
	5 hrs
	24 hrs

*Select line to see individual stability curve

At the heart of LIFI® is the bulb sub-assembly where a sealed bulb is embedded in a dielectric material. This design is more reliable than conventional light sources that insert degradable electrodes into the bulb. The dielectric material serves two purposes: first as a waveguide for the RF energy transmitted by the RF Power Amplifier Circuit and second as an electric field concentrator that focuses energy in the bulb. The energy from the electric field rapidly heats the material in the bulb to a plasma state that emits light of high intensity and full spectrum. The LIFI light source provides a lifetime in excess of 10,000 hours, which is ten times that of a conventional Xenon bulb.

**The lifetime of >10,000 hours is rated as the time when the intensity reaches 50% of the original output.