Integrating Spheres

With over 40 years of experience in designing integrating spheres, Gamma Scientific has the expertise to build custom integrating spheres and sphere systems to meet your testing requirements.

Gamma Scientific integrating spheres are available in a wide range of sizes from 25mm to 3m in diameter. Multi-purpose integrating spheres provide maximum flexibility and are custom built to meet your exact testing requirements. Light measurement spheres for LED testing are optimized for capturing total flux measurements of LEDs, lamps and luminaires.

Choose from our proprietary polytetrafluoroethylene (PTFE), a specially formulated barium-sulfate or gold coating. The PTFE coating gives > 99% reflectance over the UV/VIS/NIR region, and is almost perfectly Lambertian.

Gamma Scientific instrument calibration is performed in our accredited laboratory using NIST-traceable standards by our staff of experienced scientists and engineers.

Our spheres are available in sizes ranging from 25 mm to 3 m in diameter, with designs optimized for a variety of applications.

When combined with a RadOMA spectroradiometer, our integrating spheres create complete testing solutions for any light measurement application. Gamma Scientific spectroradiometer systems rapidly capture complete spectral measurements with high sensitivity, superior color, linearity and amplitude accuracy. RadOMA spectroradiometers from Gamma Scientific come with a NIST-traceable factory calibration and can be self calibrated by the end user. Unique configurations are optimized for LED testing, display measurement and ANVIS testing of cockpit displays. Custom spectroradiometer solutions are designed for integration into production lines and R&D testing environments.

All Gamma Scientific instruments are distinguished by their value, providing unmatched quality at competitive prices.


Light Measurement Sphere Specifications

Model Diameter Coating Internal Baffles
GS-IS1 1 inch / 25 mm PTFE or Barium Sulfate No
GS-IS1.5 1.5 inch / 38 mm PTFE or Barium Sulfate No
GS-IS4 4 inch / 100 mm PTFE or Barium Sulfate Yes
GS-IS6 6 inch / 150 mm PTFE or Barium Sulfate Yes
GS-IS8 8 inch / 150 mm PTFE or Barium Sulfate Yes
GS-IS12 12 inch / 300 mm Barium Sulfate Yes
GS-IS12-TLS-H 12 inch / 300 mm Barium Sulfate Yes
GS-IS20 20 inch / 500 mm Barium Sulfate Yes
GS-IS40 40 inch / 1000 mm Barium Sulfate Yes
GS-IS60 60 inch / 1500 mm Barium Sulfate Yes
GS-IS80 80 inch / 2000 mm Barium Sulfate Yes

Standard Port Locations

2 Port 0° and North Pole or 0° and 90°
3 Port 0°, 90° and North Pole
4 Port 0°, 90°, 270° and North Pole
5 Port 0°, 90°, 180°, 270° and North Pole

Multi-Purpose Integrating Spheres

Multi-Purpose Integrating Spheres from Gamma Scientific have been designed to provide maximum flexibility for a wide range of testing applications. With multi-purpose integrating spheres we can quickly build a custom sphere to meet your exact test requirements.

Get started by choosing your required interior diameter size, reflectance coating material and port configuration. We will then custom build the integrating sphere based on your specific requirements. This ensures that you receive a sphere which is optimized for your exact test and measurement needs.

Multi-Purpose Integrating Sphere Specifications

Model Number Diameter(in) Coating Entrance
90° North Pole 180°
GS-IS-010-MP-3P-B 1 Barium Sulfate 0.25 0.25 0.25
GS-IS-010-MP-3P-T 1 Teflon(PTFE) 0.25 0.25 0.25
GS-IS-010-MP-3P-G 1 Gold 0.25 0.25 0.25
GS-IS-010-MP-4P-B 1 Barium Sulfate 0.25 0.25 0.25 0.25
GS-IS-010-MP-4P-T 1 Teflon (PTFE) 0.25 0.25 0.25 0.25
GS-IS-010-MP-4P-G 1 Gold 0.25 0.25 0.25 0.25
GS-IS-020-MP-3P-B 2 Barium Sulfate 1.00 0.50 0.50
GS-IS-020-MP-3P-T 2 Teflon(PTFE) 1.00 0.50 0.50
GS-IS-020-MP-3P-G 2 Gold 1.00 0.50 0.50
GS-IS-020-MP-4P-B 2 Barium Sulfate 1.00 0.50 0.50 0.50
GS-IS-020-MP-4P-T 2 Teflon(PTFE) 1.00 0.50 0.50 0.50
GS-IS-020-MP-4P-G 2 Gold 1.00 0.50 0.50 0.50
GS-IS-040-MP-3P-B 4 Barium Sulfate 1.50 1.00 1.00
GS-IS-040-MP-3P-T 4 Teflon(PTFE) 1.50 1.00 1.00
GS-IS-040-MP-3P-G 4 Gold 1.50 1.00 1.00
GS-IS-040-MP-4P-B 4 Barium Sulfate 1.50 1.00 1.00 1.00
GS-IS-040-MP-4P-T 4 Teflon(PTFE) 1.50 1.00 1.00 1.00
GS-IS-040-MP-4P-G 4 Gold 1.50 1.00 1.00 1.00
GS-IS-060-MP-3P-B 6 Barium Sulfate 2.50 1.00 1.00
GS-IS-060-MP-3P-T 6 Teflon(PTFE) 2.50 1.00 1.00
GS-IS-060-MP-3P-G 6 Gold 2.50 1.00 1.00
GS-IS-060-MP-4P-B 6 Barium Sulfate 2.50 1.00 1.00 1.00
GS-IS-060-MP-4P-T 6 Teflon(PTFE) 2.50 1.00 1.00 1.00
GS-IS-060-MP-4P-G 6 Gold 2.50 1.00 1.00 1.00

Gamma Scientific Optical Integrating Tube

Gamma Scientific’s new optical integrating tube is an affordable alternative for testing your T8 and T12 lamps. The integrating tube can test lamps up to four feet in length, and adjusts to accommodate shorter lamps.

Our proprietary technology ensures that measurements are as accurate as those from a 2 meter integrating sphere, at less than half the price. The table top integrating tube is portable and occupies a much smaller footprint than a 2m integrating sphere.

Spectral Sphere Systems

New Spectral Sphere Systems from Gamma Scientific combine our integrating spheres and RadOMA Spectroradiometers to produce highly repeatable measurements of total luminous flux and total spectral flux. Spectral Sphere Systems are uniquely designed for easy integration with your production lines or as turnkey LED test systems for RnD and QA applications.

Integrating Sphere Technology and Applications

The integrating sphere is a fundamental optical technology, commonly used in photometry and radiometry, for applications including the test and measurement of light sources (lamps, LEDs, lasers, fiber-optic illuminators), sensors (focal-plane arrays, spectrometers, and camera systems), and material properties (reflectance and transmittance).

In the most general terms, an integrating sphere consists of a spherical shell, with a diffuse white (and therefore highly reflective) optical coating on its inside surface. Ports or apertures in the sphere wall admit or release light, which undergoes multiple diffuse reflections within the sphere cavity. Such reflection serves to spatially homogenize the light passing through the sphere, attenuating the optical signal significantly in the process. Typically, one or more baffles within the sphere cavity are positioned strategically to shield system components from undesired direct illumination, thereby enhancing sphere performance.

Though specific attributes vary with application, an integrating sphere is generally used to perform the following functions

  • Collection of light – from some type of source
  • Spatial averaging (homogenization)
  • Illumination – of some type of sensor or specimen

Key Design Specifications

  • Sphere diameter
  • Number of ports
  • Port dimensions and location
  • Baffle position(s) and function(s)
  • Mechanical interfaces: Port adaptors, mounting fixtures, etc.

Key Performance Specifications

  • Spectral reflectance of coating
  • Thermal and environmental stability of coating
  • Uniformity/Homogeneity
  • Attenuation or efficiency

Selecting a Sphere Solution

Some of our most popular integrating spheres and sphere-based systems are listed by application below. A complete list of standard spheres is presented in the attached sphere selection chart; the attached system selection chart presents a complete list of standard sphere-based system configurations.

RadOMA-LED-F Spectroradiometer System – for led test and measurement, with Model IS12 integrating sphere; measures spectral flux and more.

uRAD-FL Laser Power Meter – for laser power measurement, with Model 2500L integrating sphere; silicon sensor; measures power in units of watts (W).

uRAD-FO Optical Power Meter – for fiber-optic testing, with a Model 2500FO integrating sphere; silicon sensor; measures radiant flux (watts).

We have also created integrating sphere selection charts that provide an overview of the standard integrating sphere components used to assemble these systems, and a preliminary guide to combining spheres with sensors and other components to create a complete, application-specific measurement system.