Integrating Spheres for Measuring Divergent Light

Integrating spheres are used especially for measuring divergent light sources such as LEDs. The light is introduced through the input port, then reflected many times by the highly reflective interior of the sphere until it illuminates the inner surface uniformly. A detector samples a small fraction of this light to measure the total power input. Ophir integrating spheres have a highly reflective diffuse white coating for measurements independent of beam size, position and divergence. There are several sphere sizes, apertures and wavelength regions available. The large IS6 series has 2 configurations for measuring divergent or parallel beams (see diagram).

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See also our High Speed, Multifunctional Integrating Spheres which enable simultaneous measurement of multiple laser parameters including: power, pulse characteristics & spectrum.

Learn more on Integrating Sphere Fundamentals and Applications and on the New Innovations for Integrating Spheres

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IS1.5-VIS-FPD-800
P/N 7Z02491
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Detector TypeSi:calib & Si:fast

Spectral Range400-1100nm

Power Range400nW-4W

Input Port ApertureØ20mm

Maximum Beam Divergence±60 deg

Fiber Optic PortSMA connector, maximum NA 0.44

Dimensions67 L x 52 W x 61 D (mm)
The IS1.5-VIS-FPD-800 provides multiple measurement capabilities in a single integrating sphere device: a) a precision photodiode for calibrated average power measurement, b) a fast photodiode for pulse shape characterization on an oscilloscope and c) an SMA fiber optic adapter for easy connection to a spectrometer. The IS1.5-VIS-FPD-800 has a small internal diameter of 1.5 inch (38mm), to minimize the pulse stretching effect inherent to integrating spheres, giving it a time constant of 0.7ns. Together with its fast silicon photodiode, the IS1.5-VIS-FPD-800 provides a pulse rise time of 0.8ns and a fall time of 2.8ns.
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IS1.5-IRG-FPD-800
P/N 7Z02493
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Detector TypeInGaAs & Fast InGaAs

Spectral Range940-1640nm

Power Range600nW-3W

Input Port ApertureØ20mm

Maximum Beam Divergence±50 deg

Fiber Optic PortSMA connector, maximum NA 0.44

Dimensions67 L x 52 W x 61 D (mm)
The IS1.5-IRG-FPD-800 provides multiple measurement capabilities in a single integrating sphere device: a) a precision photodiode for calibrated average power measurement, b) a fast photodiode for pulse shape characterization on an oscilloscope and a built in SMA fiber adapter, and c) an SMA fiber optic adapter for easy connection to a spectrometer. The IS1.5-IRG-FPD-800 has a small internal diameter of 1.5 inch (38mm), to minimize the pulse stretching effect inherent to integrating spheres, giving it a time constant of 0.7ns. Together with its fast InGaAs photodiode, the IS1.5-IRG-FPD-800 provides a pulse rise time of 0.8ns and a fall time of 5ns.
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IS-1-2W
P/N 7Z02484
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ApertureØ5mm

Spectral Range220-1100nm

Power Range500nW-2W

DimensionsØ50W x 38 D (mm)
The IS-1-2W is a calibrated 1” internal diameter integrating sphere photodiode laser measurement sensor. It is used for measuring divergent beams up to +/-50 degrees, especially from fibers. It has a 5mm aperture and can measure from 500nW to 2W. It covers the spectral range from 0.22 to 1.1µm. The sensor comes with a 1.5 meter cable for connecting to a meter or PC interface.
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3A-IS
P/N 7Z02404
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ApertureØ12mm

Spectral Range350-1100nm

Power Range1µW-3W

Dimensions68 L x 95 W x 46 D (mm)
The 3A-IS is an integrating sphere photodiode laser measurement sensor for divergent beams up to +/-40 degrees. It has a 12mm aperture and can measure from 1µW to 3W. It covers the spectral range from 0.35 to 1.1µm. The sensor comes with a 1.5 meter cable for connecting to a meter or PC interface.
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3A-IS-IRG
P/N 7Z02403
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ApertureØ12mm

Spectral Range800-1700nm

Power Range1µW-3W

Dimensions68 L x 95 W x 46 D (mm)
The 3A-IS-IRG is an integrating sphere InGaAs photodiode laser measurement sensor for divergent beams up to +/-40 degrees. It has a 12mm aperture and can measure from 1µW to 3W. It covers the spectral range from 0.8 to 1.7µm. The sensor comes with a 1.5 meter cable for connecting to a meter or PC interface.
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IS6-C (for collimated beams)
P/N 7Z02474
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ApertureØ25mm

Spectral Range200-2200nm

Power RangeN.A.

DimensionsØ154 (mm)
The IS6-C is a 6” integrating sphere (5.3” inside) for use with collimated (C) beams. It has no detectors, where the detection configuration for the IS6-C is done by the user. It can also be used as a uniform light source.
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IS6-D (for divergent beams)
P/N 7Z02487
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ApertureØ63.5mm

Spectral Range200-2200nm

Power RangeN.A.

DimensionsØ154 (mm)
The IS6-D is a 6” integrating sphere (5.3” inside) for use with divergent (D) beams. It has no detectors, where the detection configuration for the IS6-D is done by the user. It can also be used as a uniform light source.
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IS6-C-VIS (for collimated beams)
P/N 7Z02470
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ApertureØ25mm

Spectral Range400-1100nm

Power Range20μW-30W

DimensionsØ154 (mm)
The IS6-C-VIS is a 6” integrating spheres (5.3” inside) with a Silicon detector for use with collimated (C) beams. The IS6-C-VIS comes with a VIS detector, is calibrated from 400 to 1100nm and can measure up to 30W.
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IS6-C-UV (for collimated beams)
P/N 7Z02472
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ApertureØ25mm

Spectral Range200-1100nm

Power Range300nW-1W

DimensionsØ154 (mm)
The IS6-C-UV is a 6” integrating spheres (5.3” inside) with a Silicon detector for use with collimated (C) beams. The IS6-C-UV comes with a UV detector, is calibrated from 200 to 1100nm and can measure up to 1W.
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IS6-C-UV-2.5"(for collimated beams)
P/N 7Z02485
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ApertureØ63.5mm

Spectral Range200-1100nm

Power Range300nW-2W

DimensionsØ154 (mm)
The IS6-C-UV-2.5" is a 6” integrating spheres (5.3” inside) with a Silicon detector for use with large collimated (C) beams. The IS6-C-UV-2.5" comes with a UV detector, is calibrated from 200 to 1100nm and can measure up to 2W.
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IS6-C-IR (for collimated beams)
P/N 7Z02476
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ApertureØ25mm

Spectral Range700-1800nm

Power Range20μW-30W

DimensionsØ154 (mm)
The IS6-C-IR is a 6” integrating spheres (5.3” inside) with a Germanium detector for use with collimated (C) beams. The IS6-C-IR comes with a IR detector, is calibrated from 700 to 1800nm and can measure up to 30W.
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IS6-D-VIS (for divergent beams)
P/N 7Z02488
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ApertureØ26mm

Spectral Range400-1100nm

Power Range20μW-30W

DimensionsØ154 (mm)
The IS6-D-VIS is a 6” integrating spheres (5.3” inside) with a Silicon detector for use with divergent (D) beams. The IS6-D-VIS comes with a VIS detector, is calibrated from 400 to 1100nm and can measure up to 30W.
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IS6-D-UV (for divergent beams)
P/N 7Z02489
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ApertureØ26mm

Spectral Range200-1100nm

Power Range300nW-1W

DimensionsØ154 (mm)
The IS6-D-UV is a 6” integrating spheres (5.3” inside) with a Silicon detector for use with divergent (D) beams. The IS6-D-UV comes with a UV detector, is calibrated from 200 to 1100nm and can measure up to 1W.
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IS6-D-IR (for divergent beams)
P/N 7Z02490
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ApertureØ26mm

Spectral Range700-1800nm

Power Range20μW-30W

DimensionsØ154 (mm)
The IS6-D-IR is a 6” integrating spheres (5.3” inside) with a Germanium detector for use with divergent (D) beams. The IS6-D-IR comes with a IR detector, is calibrated from 700 to 1800nm and can measure up to 30W.
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IS6-D-IR-170 (for divergent beams)
P/N 7Z02486
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ApertureØ8mm

Spectral Range700-1800nm

Power Range20μW-30W

DimensionsØ154 (mm)
The IS6-D-IR-170 is a 6” integrating spheres (5.3” inside) with a Germanium detector for use with highly divergent (D) beams up to 170°. The IS6-D-IR-170 comes with a IR detector, is calibrated from 700 to 1800nm and can measure up to 30W.
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