Integrating Spheres ISP 75 / 250 / 500 / 1000

Assessment of the total radiant power or luminous flux of light sources using integrating spheres is one of the most important tests in light measurement. The inside surface of an integrating sphere is coated with a diffusely reflecting material which guarantees complete integration and homogenization of the emitted radiation. The integrated light is then measured at the detector port.

Instrument Systems has developed a complete series of integrating spheres, available in a wide range of sizes and providing functionality for a broad spectrum of applications. A deciding factor in choosing the appropriate integrating sphere is the maximum dimension of the light source to be measured. Larger sources require the use of larger integrating spheres in order to keep measurement errors to a minimum.

All integrating spheres have a side entrance port for determining luminous flux in the 2π configuration (i.e. for determining emission into the forward hemisphere only). With the larger integrating spheres, the test object can also be mounted in the center, thus permitting measurements in the 4π configuration (i.e. for determining emission in all directions).

Model Overview:

Model Diameter Entrance port on side Internal lamp post Features Application
ISP 75 75 mm yes no can be coupled to LED Station; version available for use with LED Tester only compatible with standard single LEDs
ISP 150L 150 mm yes no for lab and production applications; version available for use with LED handlers and waferprobers; 2π measurements for all single and high power LEDs
ISP 250 250 mm yes no CIE 127 compliant for 2π measurements for all single and high power LEDs as well as small LED modules
ISP 500 500 mm yes yes CIE 127 compliant for 2π and 4π measurements compatible with all LEDs, mid-sized modules and small lamps
ISP 1000 1000  mm yes yes lamp post for both standing and hanging arrangements;
stable mounting platform for large test sources
compatible with all high power LEDs, large modules and lamps
ISP 2000 1900 mm yes yes lamp post for both standing and hanging arrangements;
stable mounting platform for large test sources
compatible with all kind of lamps, luminaires and SSL products
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