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    QTH Light Sources

    The QTH Light Source

    The spectral distribution of a WTH lamp is close to that of a blackbody curve with a colour temperature of approximately 3000°K. QTH lamps have a useful spectral output from 300nm to 2.7µm.

    Light from QTH lamps is emitted by a heated filament. The filament is enclosed in a quartz envelope filled with gases. The spectral distribution is close to that of a blackbody curve with a colour temperature of approximately 3000°K. QTH lamps have a useful spectral output from 300nm to 2.7µm with several advantages: a smooth spectrum without lines, high output in the visible and infrared regions, high temporal and spatial stability, and inexpensive operation.

    QTH lamps are standard for photometric applications since they are much brighter than typical IR sources (SiC, ceramic, etc.) For applications where temporal stability is not critical, the high power models can be AC operated. The 120 Hz ripple of AC powered high current bulbs (> 5 A) is well under 1%. The main source of instability is line voltage variation.

    QTH Light Source

    Customizable

    All components of the system, including light source and monochromator, can be customized. Options include:

    Scientific Grade Lamp housing
    Collimated Uniform 1 Inch Diameter Output Beam
    Supports 50W-1000W Quartz Tungsten Halogen (QTH) Lamps
    Forced Air Cooled
    Available Refractive Condensing Optics Attachments
    Touchscreen Power Supply
    Vertically Mounted QTH Filament Lamp
    Side Exit Port with Back Spherical Reflector

    Optimal Configuration

    The QTH lamp is mounted in a vertical position with the exit port on the side wall. A back spherical reflector mounted on adjustable alignment pins redirects the rear illumination to the forward exit port thereby doubling the amount of light collected.

    QTH Infrared Custom Solar Simulator

    Using a QTH lamp for illuminate test areas of more than 1 meter with a one sun intensity. Learn more about our custom projects here.

    QTH on a Tunable Monochromatic Light Source

    Sciencetech also offers a tunable light source with QTH lamp, Learn more about our Tunable Light Source Models here.

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    Includes 1 inch diameter fused silica collection optics that produce a collimated beam
    Includes adapter for 100W QTH Lamp
    Housing can Support xenon, mercury, mercury-xenon arc lamps and QTH lamps.
    Includes spherical back reflector for increasing collected optical intensity
    Forced Air Cooled
    Refractive condensing optics attachments available
    Variable power supply (purchased separately) with optical feedback (option)
    Standard vertical orientation, horizontal mounting bracket for standard 3" optical height available.
    $ 2,213.00
    In stock
    Includes 1 inch diameter fused silica collection optics that produce a collimated beam
    Includes adapter for 100W QTH Lamp
    Housing can Support xenon, mercury, mercury-xenon arc lamps and QTH lamps.
    Includes spherical back reflector for increasing collected optical intensity
    Forced Air Cooled
    Refractive condensing optics attachments available
    Variable power supply (purchased separately) with optical feedback (option)
    Standard vertical orientation, horizontal mounting bracket for standard 3" optical height available.
    $ 2,213.00 2213.0 USD
    Price Valid only in North America

    Includes 1 inch diameter glass collection optics that produce a collimated beam
    Includes adapter for 250W QTH Lamp
    Housing can Support xenon, mercury, mercury-xenon arc lamps and QTH lamps.
    Includes spherical back reflector for increasing collected optical intensity
    Forced Air Cooled
    Refractive condensing optics attachments available
    Variable power supply (purchased separately) with optical feedback (option)
    Standard vertical orientation, horizontal mounting bracket for standard 3" optical height available.
    $ 2,213.00
    In stock
    Includes 1 inch diameter glass collection optics that produce a collimated beam
    Includes adapter for 250W QTH Lamp
    Housing can Support xenon, mercury, mercury-xenon arc lamps and QTH lamps.
    Includes spherical back reflector for increasing collected optical intensity
    Forced Air Cooled
    Refractive condensing optics attachments available
    Variable power supply (purchased separately) with optical feedback (option)
    Standard vertical orientation, horizontal mounting bracket for standard 3" optical height available.
    $ 2,213.00 2213.0 USD
    Price Valid only in North America

    Includes 2 inch diameter glass collection optics that produce a collimated beam
    Includes adapter for 50W QTH Lamp
    Housing can Support xenon, mercury, mercury-xenon arc lamps and QTH lamps.
    Includes spherical back reflector for increasing collected optical intensity
    Forced Air Cooled
    Refractive condensing optics attachments available
    Variable power supply (purchased separately) with optical feedback (option)
    Standard vertical orientation, horizontal mounting bracket for standard 3" optical height available.
    $ 2,593.00
    In stock
    Includes 2 inch diameter glass collection optics that produce a collimated beam
    Includes adapter for 50W QTH Lamp
    Housing can Support xenon, mercury, mercury-xenon arc lamps and QTH lamps.
    Includes spherical back reflector for increasing collected optical intensity
    Forced Air Cooled
    Refractive condensing optics attachments available
    Variable power supply (purchased separately) with optical feedback (option)
    Standard vertical orientation, horizontal mounting bracket for standard 3" optical height available.
    $ 2,593.00 2593.0 USD
    Price Valid only in North America

    Includes 2 inch diameter fused silica collection optics that produce a collimated beam
    Includes adapter for 250W QTH Lamp
    Housing can Support xenon, mercury, mercury-xenon arc lamps and QTH lamps.
    Includes spherical back reflector for increasing collected optical intensity
    Forced Air Cooled
    Refractive condensing optics attachments available
    Variable power supply (purchased separately) with optical feedback (option)
    Standard vertical orientation, horizontal mounting bracket for standard 3" optical height available.
    $ 2,655.00
    In stock
    Includes 2 inch diameter fused silica collection optics that produce a collimated beam
    Includes adapter for 250W QTH Lamp
    Housing can Support xenon, mercury, mercury-xenon arc lamps and QTH lamps.
    Includes spherical back reflector for increasing collected optical intensity
    Forced Air Cooled
    Refractive condensing optics attachments available
    Variable power supply (purchased separately) with optical feedback (option)
    Standard vertical orientation, horizontal mounting bracket for standard 3" optical height available.
    $ 2,655.00 2655.0 USD
    Price Valid only in North America

    Sciencetech’s 201-1K-QTH lamp housing allows for vertically mounted 500W-1500W DC operated Quartz Tungsten Halogen (QTH) filament lamps. Such lamps produce a large VIS-NIR output and some UV light. The spectral output is smooth and approximates a 3300K black body. Since each wattage lamp has its own socket style, a QTH lamp housing may only accommodate the selected wattage lamp once the socket style is specified. The unit is forced air-cooled with a blower at the top of the housing hat draws air from the bottom intake and expels it out the top of the housing. The lamp socket is mounted vertically on alignment pins such that the lamp’s filament can be properly centered to the housing’s back spherical reflector and front light exit port for optimum light output efficiency. The lamp house comes standard with an F/1.5 BK7 Lens to collect light from the QTH lamp.

    Please note that this product requires the bulb to be purchased separately and included in the quotation as a separate line item. Please contact your authorized Sciencetech technical sales staff member for any questions.
    $ 2,750.00
    In stock
    Sciencetech’s 201-1K-QTH lamp housing allows for vertically mounted 500W-1500W DC operated Quartz Tungsten Halogen (QTH) filament lamps. Such lamps produce a large VIS-NIR output and some UV light. The spectral output is smooth and approximates a 3300K black body. Since each wattage lamp has its own socket style, a QTH lamp housing may only accommodate the selected wattage lamp once the socket style is specified. The unit is forced air-cooled with a blower at the top of the housing hat draws air from the bottom intake and expels it out the top of the housing. The lamp socket is mounted vertically on alignment pins such that the lamp’s filament can be properly centered to the housing’s back spherical reflector and front light exit port for optimum light output efficiency. The lamp house comes standard with an F/1.5 BK7 Lens to collect light from the QTH lamp.

    Please note that this product requires the bulb to be purchased separately and included in the quotation as a separate line item. Please contact your authorized Sciencetech technical sales staff member for any questions.
    $ 2,750.00 2750.0 USD
    Price Valid only in North America

    Illuminates Fiber Bundles up to 13mm diameter
    Visible Light Fiber Illuminator with built-in IR filter
    100 W QTH lamp with integrated dichroic ellipsoidal reflector
    Dichroic cold mirror and heat dump to eliminate infrared light
    Collimating and condensing optics into a fiber
    Filter drawer for interference filters
    Regulated adjustable 100W DC power supply
    Operation at 230VAC@50Hz or 120VAC@60Hz

    $ 3,300.00
    In stock
    Illuminates Fiber Bundles up to 13mm diameter
    Visible Light Fiber Illuminator with built-in IR filter
    100 W QTH lamp with integrated dichroic ellipsoidal reflector
    Dichroic cold mirror and heat dump to eliminate infrared light
    Collimating and condensing optics into a fiber
    Filter drawer for interference filters
    Regulated adjustable 100W DC power supply
    Operation at 230VAC@50Hz or 120VAC@60Hz

    $ 3,300.00 3300.0 USD
    Price Valid only in North America
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