Compare Model Drawings, CAD & Specs Availability Price
Integrating Sphere, 3-Port, 4 in. Diameter, Barium Sulfate, Port Frame Reducer Included
In Stock
In Stock
Integrating Sphere, 3-Port, 6 in. Diameter, Barium Sulfate, Port Frame Reducer Included
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In Stock



Three Port Integrating Sphere for Diverging Beams

819D Series modular integrating sphere bodies feature three ports located at 0 and 90 degrees, as well as at the north pole. The baffle is located between the 0- and the 90-degree ports. Compared with Four Port 819C Series spheres, the 819D Series provides a better integration of the light input. We offer a wide variety of integrating sphere accessories that mount to the port frames, allowing the sphere to be customized for multiple applications.

Divergent Beam Integrating Sphere Applications

The 819D-IS series spheres are configured to be suitable for a divergent beam measurement.  A typical configuration has the source beam entering through the 0° port with a baffled detector mounted on the 90° port. Common applications include measuring power of divergent light sources such as laser diodes, lensed LEDs, lensed lamps and lensed fiber. For more details about these applications, please see our Integrating Sphere Fundamentals and Applications tutorial.

Divergent Light Source Power Measurement

Cost Effective Barium Sulfate Sphere Coating

Our barium sulfate integrating sphere coating has an effective range from 300 nm to 2400 nm, with reflectivity greater than 97% at 600 nm. It is a cost effective and adequate for most radiation measurement applications. The unmatched environmental stability and high-performance of the Spectralon™ based spheres are derived from their rugged monolithic thermoplastic material and are superior to coated integrating spheres. In addition, their high damage threshold surface can be cleaned with distilled water. However, since the coating is water soluble, we recommend the PTFE based spheres for a high humidity environment.

Our integrating spheres are available with PTFE (spectralon), barium sulfate (spectraflect), and diffused gold sphere materials.

Selecting an integrating sphere size

Among the factors in selecting the size of an integrating sphere is the physical limitation of the measurement setup that will be used. Generally, as the sphere diameter grows, the “integration” property of the sphere improves, the port size can be larger and higher input power can be accommodated. However, with the increasing attenuation of the setup, the throughput will be decreased.

Integrating Sphere Accessories

Newport offers accessories that are compatible with our integrating spheres to build a complete integrating sphere system. Various adapters are available to change port frame diameter, reduce an input port's clear aperture, measure fiber optic power, connect lens tubes and mount sensors. Port plugs to block an unused sphere port are also available.