Compare Model Drawings, CAD & Specs Availability Price
Integrating Sphere, 3-Port, 2 in. Diameter, PTFE
1 Week
1 Week
Integrating Sphere, 3-Port, 3.3 in. Diameter, PTFE, Port Frame Reducer Included
In Stock
In Stock
Integrating Sphere, 4-Port, 5.3 in. Diameter, PTFE, Port Frame Reducer Included
In Stock
In Stock



Integrating Sphere for Diverging Beams

The 819D-SL 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-SL spheres provide 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. Please note that 819D-IS-5.3 is a four port system but comes with a port reducer at the 0-degree port and a port plug at the 180-degree port.

3-Port Integrating Sphere Applications

If only the 0° and 90° ports are required, a 3-port integrating sphere provides better integration of light input compared to a 4-port sphere. 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

PTFE Sphere Material for Demanding Applications

Hydrophobic, chemically inert and thermally stable to 350°C, Spectralon (PTFE) based integrating spheres can be used in more demanding environments, including underwater and high or low temperature processes. At the same time, reflectance exceeding 95% from 250–2500 nm, 98% from 310–2100 nm, and 99% from 400–1500 nm make them ideal for even the most demanding measurements from the ultraviolet to the near infrared.

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.