One of the most important tests in light measurement is the assessment of the total radiant power or luminous flux of light sources using integrating spheres. An integrating sphere’s inside surface 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.
A complete series of integrating spheres has been developed by Instrument Systems and is available in a wide range of sizes to provide functionality for a broad spectrum of applications. The maximum dimension of the light source to be measured provides the deciding factor in choosing the appropriate integrating sphere. Larger sources require the use of larger integrating spheres in order to keep measurement errors to a minimum.
Instrument Systems integrating spheres all have a side entrance port for determining luminous flux in the 2π configuration (i.e. for determining emission into the forward hemisphere only). With larger integrating spheres, the test object can be mounted in the center, permitting measurements in the 4π configuration (i.e. for determining emission in all directions).
Click here for the Integrating Spheres Brochure.
|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 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|
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