Solutions & Capabilities

Airborne Calibration

Airborne Calibration

The need for precise radiometric solutions for aerial reconnaissance and imaging is steadily increasing with the advent of Unmanned Aerial Vehicles (UAVs) and more detailed image requirements in a variety of challenging tactical environments. Science has also taken to the air with hyperspectral, LIDAR and spectral sensing applications that require accurate calibration and portability to remote locations. Labsphere can create a variety of field-based solutions for real-time calibration:

  • Custom onboard solutions for real-time radiometric verification in aircraft
  • Large, weather resistant targets used at-site for ground truth measurements
  • Mobile sphere system solutions that sit in the hangar ready to deploy for fast calibration and certification needs

Ambient Contrast Testing

Ambient Contrast Testing

Sources of luminance and radiance designed to uniformly illuminate for displays and video screens for testing ambient contrast to determine visibility of the display image under varying illumination conditions.


Ambient Light Sensor Calibration

Ambient Light Sensor Calibration

Ambient light sensors are designed to detect brightness in the same way as human eyes do. They are used wherever the settings in a system have to be adjusted to the ambient conditions as perceived by humans. Smart sensors can predict the indoor or outdoor lighting condition and make the appropriate corrections. This requires a smart calibration source. Labsphere has a selection of broadband and tunable spectral light sources to characterize the spectral response of these sensors.


Automotive Light Source Calibration

Automotive Light Source Calibration

For applications requiring the total output and color of the automotive lamp an integrating sphere spectrometer is used. The lamp under test is placed in the center of an integrating sphere spectrometer which collects the total spectral output of the lamp. The reading from the detection system is compared to a similar reading obtained from a calibrated reference standard lamp of known output, commonly referred to as the “comparison method”. The results of this comparison determine the measurement of the flux output of the unknown lamp. Labsphere’s Illumia® line of integrating sphere spectrophotometers are ideal for testing total spectral flux of interior and exterior automotive lamps.

Automotive lamps also require the measuring and reporting of the directionality of the emitted light. For this characterization Labsphere’s Type A and Benchtop goniophotometers are excellent for directionality control and test. 


Automotive Sensor Calibration

Automotive Sensor Calibration

Not knowing what equipment and processes are needed to complete your automotive sensor projects can be daunting. We can assist you with identifying the tools you need to design and qualify your products to global industry and regulatory standards. We engineer repeatable, durable targets to characterize and calibrate LIDAR sensors over a broad range of ambient conditions. Our tunable LED sources provide a wide variety of spectra from one source to baseline your sensors quickly and accurately in both R&D and Production environments.


Color Calibration of Sensors

Color Calibration of Sensors

Calibrate imaging colorimeters, cameras, ambient light sensors and spectroradiometers for color accuracy and recognitions with broad band and tunable solid state uniform light source reference standards.


Color Measurement of Light Source

Color Measurement of Light Source

For accurate measurement of LEDs, LED modules, light engines, lamps and luminaires color performance Labsphere offers a variety of total spectral distribution and spatial measurement systems for full characterization. 


Efficiency of Lamps and Luminaires

Efficiency of Lamps and Luminaires

Qualify lamps and luminaires for Energy Efficiency to global standards with Labsphere’s renowned total spectral flux measurements systems and standards.


Fiber Optic Illuminator Measurement

Fiber Optic Illuminator Measurement

Manufacturers, distributors and users of boroscopes, endoscopes, and similar systems require precise calibration and/or characterization of the fiber-optic-based illuminator systems used with these devices. Measurements are performed by directing the light from the fiber illuminator or light guide into an integrating sphere, which collects the total flux from the source, and, by a process of multiple reflections, transfers a representative portion of this flux to a detection system. Typical quantity of interest is luminous flux expressed in lumens.


Flashlight Measurement

Flashlight Measurement

The American National Standards Institute (ANSI) has specified a standard for flashlight performance, ANSI/NEMA FL-1:2009. The standard was developed by the Flashlight Standards Committee of the National Electrical Manufacturers Association (NEMA), and was convened by a committee of flashlight manufacturers.

The purpose of the standard is to allow consumers to make valid comparisons of light brands and models and to eliminate exaggerated light performance by quoting “emitter lumens” or “out-the-front lumens”. The tests can be performed by the manufacturer or an independent lab.

ANSI/NEMA FL-1 specifies flashlights for the following parameters: Light Output, Runtime, Peak Beam Intensity, Beam Distance, Water Resistance, and Impact Resistance.


Flat Fielding/PRNU

Flat Fielding/PRNU

Characterization of pixel-to-pixel, or sensor, or imager non-uniformity in response by exposure to a known uniform (flat) field of light with Labsphere’s expansive line of broadband and tunable light sources.


Fluorescence (Phosphor) Materials

Fluorescence (Phosphor) Materials

Doping Labsphere Spectralon®, a stable non-fluorescing substrate material with stable inorganic phosphors with known stimulus bands and stokes emission bands to create a machinable fluorescent material for instrument performance validation.


Ground Truth

Ground Truth

Validate airborne or space-borne optical measurements with traceable measurements on designated ground diffuse reflectance targets.


Ground-Based Imager & Sensor Testing

Ground-Based Imager & Sensor Testing

Solutions for ground-based testing are driven by the needs and testing of today’s cutting edge satellites, terrestrial and airborne imaging systems.

Incredible dynamic range, solar spectrums, precision multi-band and spectral monitoring and most of all unprecedented levels of low uncertainty are the hallmark of the science and military remote sensing programs today.

Whether you are trying to understand weather and climate changes, investigating hyperspectral applications or have specific tactical requirements, Labsphere can build a test system that will suit your needs. Solutions are available for a huge range of aperture sizes: from 25mm to 2m.


Hyperspectral Calibration

Hyperspectral Calibration

One of the most dynamic changes to the remote sensing market is the innovation of hyperspectral imagers. These challenging devices combine a conventional 2D image with a third dimension containing spectral or band information to create a “hyper-cube”. Calibration also gets a third dimension of complexity in dealing with simultaneous imaging issues, broadband scenes, spectral registration and stray light (in and out of band) considerations.

Labsphere can create complete, absolute calibration systems that combine broad spectrums, mono- chromatic or line sources, and high dynamic ranges to meet the requirements of this new and rapidly evolving technology.


Illuminance Measurements

Illuminance Measurements

Measurement of visible light striking a designated surface or theoretical plane in space.  Typically involved cosine receivers and photopic sensor or spectrometer.


Image Sensor Calibration

Image Sensor Calibration

Comprehensive tunable and broadband uniform light source standards for the characterization and calibration of consumer and industry imaging products.


Intensity Measurement

Intensity Measurement

Characterize the temporal and spatial intensity distribution of LEDs, lamps and luminaires for general and automotive lighting with a diverse selection of robust and accurate goniophotometers, goniospectrometers and Tristimulus system.


Lamp/Luminaire Measurement

Lamp/Luminaire Measurement

Total spectral flux, luminous flux, color and thermal characterization of LEDs, lamps and luminaires with integrating sphere spectrometers from 0.25m to 3m systems and standards. Contact us to learn which system is right for you.


Laser Measurement

Laser Measurement

Labsphere’s laser power measurements systems assures an accurate and reproducible method of determining the total power from a collimated or divergent lasers and laser diodes insensitive to the laser alignment. 


Laser Pump Chambers

Laser Pump Chambers

A Spectralon® reflector surrounding the laser rod serves again to improve the pumping efficiency by reflecting pump radiation that is not absorbed by the laser rod on its first pass.  Benefits to using Spectralon versus other material options include: 1) easily machined rapid prototype if Spectralon design guidelines are followed, 2) extremely uniform pumping which results in an optimum beam profile,  and 3) exceptionally long life time. 


LED Measurement

LED Measurement

Typical quantities for LED characteristics include luminous flux, luminous intensity, x, y, dominate wavelength, peak wavelength, FWHM and for white LEDs, CRI and spatial distribution with sensitivity to temperature, current and voltage. Ask us about our lab and production solutions.


Light Sensor Calibration and Characterization

Light Sensor Calibration and Characterization

Light sensors are characterized for their linearity, quantum efficiency, spectral responsivity and uniformity in response. Labsphere offers a broad selection of test equipment for the R&D and production. 


Linearity/Dynamic Range (Sensor)

Linearity/Dynamic Range (Sensor)

Testing a device using a known (calibrated) uniform light source that can translate from very low to very high levels and determine the saturation and signal to noise of the camera and the linearity & dynamic response of the camera over that range of light. Labsphere offers specific lines of calibration sources and targets for linearity testing.


LM-82 Lamps and Luminaire Elevated Temperature Tests

LM-82 Lamps and Luminaire Elevated Temperature Tests

Ask us about our thermally controlled integrating sphere spectrometer options and Integral® software for testing to IES LM-82 guidelines. 


Luminance Contrast

Luminance Contrast

Testing of displays and video screens for emission of visible light vs reflected ambient light. This is done to determine visibility of the display image and requires a uniform source of irradiance on the display. Labsphere’s uniform source spheres and systems can be configured to meet your display test needs.


Luminance Meter Calibration

Luminance Meter Calibration

Usually measured with an imaging photometer know as a luminance meter or spectroradiometer. To calibrate these instruments an accurate source of luminance is required. Labsphere offers both source and target based solutions NMI traceable luminance calibrations.


Optical Power (watts)

Optical Power (watts)

Measurement of optical energy.  Typically done with an integrating sphere to remove angular and area factors.  Labsphere laser power and spectral light measurement systems assure an accurate and reproducible method of determining the total power from a collimated or omnidirectional source.


Proximity Sensor Test

Proximity Sensor Test

A proximity sensor is a device which detects objects when they get within a certain distance from the sensor. The proximity sensor will then usually send a signal to an electronic circuit (proximity switch) to perform a simple action, such as opening a door, turning on a light, sounding an alarm for industrial safety, or deactivate embedded programs like that of a smart phone. To calibrate the sensitivity of an optical proximity sensor to the objective a target of similar diffuser reflectance is required. 


Quantum Efficiency (Phosphor)

Quantum Efficiency (Phosphor)

Measurement of the quantity and wavelengths of emitted photons from a phosphor or fluorescing material as a function of a known amount of stimulating photons at known wavelengths. Labsphere offers spheres, components and application specific solutions for QE testing. Contact us for assistance with choosing the right equipment for your Phosphor QE testing.


Quantum Efficiency (Sensor)

Quantum Efficiency (Sensor)

Characterizing imaging and flat panel arrays of CMOS, CCD and photo sensors for quantum efficiency and spectral responsivity requires absolute values of known irradiance or radiance in defined wavelength bandpasses over the sensitivity range of the sensors under test. Contact us about our turn key lab systems and tunable source product systems for QE and spectral responsivity.


Quantum Efficiency (Sensor)

Reflectance Factor

Reflectance of a surface in a given optical geometry as referenced to a perfect Lambertian diffuser. Labsphere offers an assortment of near Lambertian, diffuse reflectance standards, targets, materials and coatings.


Source Sensor Compensation

Source Sensor Compensation

To optimize an image instrument's sensors to the illumination source and target of known reflectance is used to adjust the light source output to optimize the sensor's exposure for the given application. The ideal reflector is diffuse, similar in reflectance levels to the samples to be tested, repeatable, reproducible and durable. Labsphere offers diffuse reflectance coatings and materials that are ideal for this application.


Spatial Distribution of Sources

Spatial Distribution of Sources

Characterize the temporal and spatial intensity distribution of LEDs, lamps and luminaires for general and automotive lighting with a diverse selection of robust and accurate goniophotometers, goniospectrometers and Tristimulus system.


Spatial Mapping of Integrating Sphere Photometers

Spatial Mapping of Integrating Sphere Photometers

The mapping of an integrating sphere against a highly collimated source as a function of 2pi or 4pi steradians.  Basically a point-by-point measurement of a laser at each square centimeter of a sphere to determine the angular/spatial response of the sphere surface so it may be corrected from a total flux measurement.  Also known as a SRDF, Spherical Response Distribution Function. Contact us for options for mapping your sphere. 


Spectral Radiance

Spectral Radiance

Spectral radiance and radiance are key radiometric values used to calibrate the spectral response of spectroradiometers, multispectral and hyperspectral imagers. Labsphere is the world leader in uniform spectral radiance calibration systems. Contact us for more on our standard and application specific solutions.


Spectral Responsivity

Spectral Responsivity

Characterizing imaging and flat panel arrays of CMOS, CCD and photo sensors for quantum efficiency and spectral responsivity requires absolute values of known irradiance or radiance in defined wavelength bandpasses over the sensitivity range of the sensors under test. Contact us about our turn key lab systems and tunable source product systems for QE and spectral responsivity.


Spectroradiometer Calibration

Spectroradiometer Calibration

Spectral radiance and radiance are key radiometric values used to calibrate the spectral response of spectroradiometers, multispectral and hyperspectral imagers. Labsphere is the world leader in uniform spectral radiance calibration systems. Contact us for more on our standard and application specific solutions.


Temporal / Stability

Temporal / Stability

Temporal stability is just one feature built into Labsphere’s metrology systems to monitor the light source stability with time. Contact us for details.


Time Of Flight

Time Of Flight

Describes a variety of methods that measure the time that it takes for a light wave to travel a distance through a medium. This measurement can be used for a time standard or track objects and even the topology of an object. To calibrate these time of flight instruments diffuse targets of varying reflectance levels and shapes are required. Labsphere’s Permaflect and Spectralon® are ideal for these applications. Contact us for more information.


Total Spectral and Luminous Flux Measurement

Total Spectral and Luminous Flux Measurement

Total spectral flux, luminous flux, color and thermal characterization of LEDs, lamps and luminaires with integrating sphere spectrometers from 0.25m to 3m systems and standards. Contact us to learn which system is right for you.


Transmittance

Transmittance

Labsphere offers a variety of reflectance and transmittance solutions in one. Standard and Custom. Contact us for assistance on choosing the right components or system for you. 


Uniform Spectral Radiance

Uniform Spectral Radiance

See Spectral Radiance.  A uniform light source with a calibrated or known spectral radiance such as an integrating sphere or a Lambertian target and light source.


UV LED Flux Measurement

UV LED Flux Measurement

Peak wavelength, bandpass, to power, efficiency and stability are just a few characteristics that describe the performance of UVA, UVB and UVC LEDs and LED modules. Contacts us about our standard and measurement solutions for R7D and productions


UV SPF/UPF Testing

UV SPF/UPF Testing

Integrating sphere systems can be used to measure the ultraviolet transmittance of sunscreen samples to determine the various protection factors (SPF) or UV protection factor (UPF) of the sample.

Many new in-vitro methods for testing sunscreen protection factors are now being embraced by the industry including COLIPA, Boots Star and the FDA. Many of these new methods involve not only testing the Sun Protection Factor (SPF) of a sunscreen, but also the UVA/UVB ray protection of the product.

For textile and fabric industries, the demand for accurate measurement of UPF is setting the pace for new global standards.

Labsphere works closely with industry leaders to develop products that allow for the fast, easy and correct preparation and in-vitro measurement of sunscreen products.


Vacuum & Thermal Vacuum

Vacuum & Thermal Vacuum

For space systems that means leaving the ambient realm for the most aggressive environment we know: the vacuum and temperature ranges of space.

Labsphere specializes in creating optical uniform sources in vacuum environments. Our materials, spheres, light sources and detectors can be designed for vacuum compatibility and stable, traceable radiometric performance.

Contact us for vacuum systems and material solutions.


Veiling Glare Measurement

Veiling Glare Measurement

The image plane of an optical or imaging system normally receives not only the image forming radiation, but also stray light which can reduce image contrast. This unwanted radiation is referred to as veiling glare. The veiling glare of lens on its own can be considerably different from the veiling glare of a lens system and camera body combination. In the latter case, reflection of part of the image-forming radiation from the image sensor in combination with further reflections and scatter from the lens system and camera body contribute significantly to the veiling glare.

One method of measuring veiling glare is termed integral method. With the integral method, the target object is a small black area surrounded by an extended uniform source. The veiling glare index is specified as the ratio of the irradiance in the image of the black area to the irradiance in the image of the extended source. In general, the integral method is applicable to systems where the scene will normally be of roughly uniform radiance, for example a landscape imaged in overcast conditions or with the sun behind the camera or lens system.