Products, Materials + Tools | Jul 22, 2010

New integrating Sphere for Testing High-Power LED Modules and SSL Light Sources

The ISP 1000 Integrating Sphere from Instrument Systems is the latest development by the leading global manufacturer of LED Test & Measurement systems. - In parallel Instrument Systems announced an improved telescopic optical probe for display measurement.

The ISP 1000 has been specially designed with a diameter of one meter for precise measurement of the total radiant power and luminous flux of lamps. It is particularly suitable for larger and more powerful LED modules with applications in solid-state lighting.

Test samples can be placed inside the integrating sphere on a height-adjustable sample stage or in a lamp post with suspended or upright configuration. These setups enable the total luminous flux to be determined in 4π. Alternatively, the light radiation can also be launched from outside through a side port, allowing the heat dissipated from large high-power LED modules to be kept out of the sphere. This is why launching light from the side is ideal for testing light engines with applications in solid-state lighting if they have a forward radiation pattern.

Advanced design and low measurement uncertainty are integral to the ISP 1000. It’s innovative design reduces the effect of compromising influences caused by baffles and ports to a minimum and thereby permits more accurate measuring results than previous designs.

In addition Instrument Systems announced an improved telescopic optical probe for display measurement

The new TOP 200 Telescopic Optical Probe from Instrument Systems has now been launched on the market. In combination with a spectrometer, the TOP 200 permits precise measurements of radiance and luminance, as well as chromaticity of displays, panel graphics and other light sources. The core of the innovations compared with the previous model is a Pritchard style optical design with integrated view-finder camera and an aperture mirror angled at just 15°. This setup p rovides a perfectly round and sharp measuring spot for maximum accuracy. The internal camera allows the field of view to be visualized at the PC. It thereby facilitates exact positioning of the TOP 200 and focusing on the defined measuring spot.

A series of easily interchangeable lenses and software-controlled apertures accommodate a large range of distances and measuring-spot sizes. The smallest measuring spot can be achieved with the high-resolution objective lens HRL-90 and is only 75 μm in diameter.

The light radiation is guided to the spectrometer along a multimode fiber. The patented mode mixer from Instrument Systems delivers uniform light transmission in the fiber and thereby facilitates reproducible measuring results, even if the position of the fiber is changed. The measuring error is below 1% compared with an error of up to 20% without mode mixer.

About Instrument Systems:
Instrument Systems is one of the leading manufacturers for LED and display measurement systems based on spectroradiometers. The company delivers a comprehensive range of light measuring products for industrial and research applications. These include highperformance array and scanning spectrometers as well as imaging photometers and colorimeters. All instruments provide accurate and reliable results as per CIE recommendations. The company was founded in 1986 and is based in Munich, Germany. Instrument Systems provides support for the global customer base with backup from a comprehensive network of representatives.