Integrating Spheres - Luminous flux measurement for LEDs and lamps
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
Model specifications
ISP 75
75 mm inner diameter
direct mounting on LED Station or on base
port for LED test sockets of the type LED-5xx und -6xx
available without port flange for use with LED sorting machines
ISP 150L
150 mm inner diameter
version mounted on base for lab use
adapter plates for LED test sockets of the type LED-5xx, 6xx and -81x
version available for use with LED handlers and waferprobers
optional auxiliary light source
ISP 250
250 mm inner diameter
CIE 127 compliant for measuring luminous flux of LEDs
75 mm Ø port for coupling from the side
adapter plates for LED test sockets of the type LED-5xx, 6xx and -81x and for TEC test adapter of the type LED-850
auxiliary light source
ISP 500
500 mm inner diameter
CIE 127 compliant for measuring luminous flux of LEDs
150 mm Ø port for coupling from the side
adapter plates for LED test sockets of the type LED-5xx, 6xx and -81x and for TEC test adapter of the type LED-850
internal lamp post for mounting test sources in the center
auxiliary light source
ISP 1000
1 m inner diameter
CIE 127 compliant for measuring luminous flux of lamps
300 mm Ø port for coupling from the side
adapter plates for LED test sockets of the type LED-5xx, 6xx and -81x and for TEC test adapter of the type LED-850
internal lamp post for mounting test sources in the center
stable mounting platform for mounting large test sources in the center
auxiliary light source
ISP 2000
1.9 m inner diameter
lamp post for measuring light sources in an upright or suspended configuration
robust and universal sample stage for all kinds of luminaires and SSL products
broad variety of standard lamp sockets for use with the internal lamp post
600 mm external measurement port for launching light radiation from outside
