Quartz Tungsten Halogen (QTH) lamps are popular for applications where a high stability, high color temperature, visible to near-infrared light source is needed without the sharp spectral lines or ultraviolet wavelength emissions that arc lamps typically exhibit. These open air mounted light sources are a convenient and cost effective calibrated solution to use as a NIST traceable standard for your laboratory needs.
| Compare | Model | Drawings, CAD & Specs | Availability | Price | |||
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QTH Light Source, 200 W, Open Air Mount, NIST traceable, 300-2400 nm
$9,215
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63976-200QC-OA QTH Light Source, 200 W, Open Air Mount, NIST traceable, 300-2400 nm | $9,215 |
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63976-45QC-OA QTH Light Source, 45 W, Open Air Mount, NIST traceable, 300-2400 nm | $8,990 |
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QTH Light Source, 1000 W, Open Air Mount, NIST traceable, 250-2400 nm
$10,750
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63978-1000QC-OA QTH Light Source, 1000 W, Open Air Mount, NIST traceable, 250-2400 nm | $10,750 |
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QTH lamps of 45 W, 200 W, and 1000 W input power are available as standalone lamps or complete light source kits for turnkey operation. The 45 W QTH lamp option outputs light from 300 to 2400 nm. The 200 W and 1000 W QTH lamp options output light from 250 to 2500 nm. A lamp should be chosen based on the wavelength and irradiance requirements of the application or system. Output irradiance of the lamp must be intense enough to produce a good signal to noise ratio without saturating a photodetector or other components in the system.
In order to achieve the certificate performance measured during operation, a highly regulated power supply capable of outputting constant current with minimum ripple is required. The OPS-Q Series Power Supplies meet that requirement. The appropriate power supply is included with all light source kits or available for separate purchase. In addition to operating a QTH lamp with minimal light ripple, external control via RS-232 or USB, external shutter control, and timer control features are among the additional benefits to using this power supply. Our calibrated QTH light kits are ideal for radiometric measurements whenever highly stable light output is needed.
The appropriate rod mount is included with each QTH light source kit. Rod mounts are open-air holders that provide a low cost alternative to lamp housings. Additional benefits when using a rod mount include the ability to place the lamp closer to the sample or desired area of illumination and the option of mounting the lamp horizontally or vertically. Users that need to collimate and focus the light output of the QTH lamp can select the appropriate lens setup from Newport's line of lenses.
For lamps with NIST traceable calibration, irradiance measurements are taken in a specially equipped calibration laboratory. When receiving a calibrated lamp, there is some uncertainty in calibration dependent on wavelength and lamp structure. A small, but additional uncertainty is introduced as a NIST calibrated lamp is used to calibrate a previously uncalibrated lamp. These uncertainties are listed in the certificate of calibration.
It is recommended that a calibrated QTH lamp be replaced after 100 hours of use to maintain the certifiate uncertainty values. While the operational lifetime will well exceed this value, expect an approximate 1-2% increase in these uncertainties for every additional 50 hours of operation, up to 250 hours. Contact Newport Sales for more information.
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