Going Beyond Traditional Light Meters to Provide Full Spectral Analysis

Now available from Ocean Optics is a light-measurement system for spectroradiometric analysis of LEDs, lamps, flat panel displays and other radiant sources, as well as solar radiation. With its small footprint, powerful microprocessor and low-power display, the new Jaz-ULM-200 is a convenient, versatile alternative to standard light meters and radiometers. Jaz is family of stackable components that share common electronics and
communications and are configurable for a variety of applications. Included in the Jaz-ULM-200 stack is a CCD-array spectrometer that can be optimised for a variety of radiometric measurements and a microprocessor with onboard display.

Jaz provides functionality not found in traditional light meters, allowing users to capture, process and store full spectra without the need for a PC. With only three pushes of a button, the system’s irradiance-measurement software, which is stored on an SD card, collects full spectral irradiance information from the selected light source. This data can then be post-processed to give the intensity parameter of choice, including W/cm2, lumens, lux, PAR (photosynthetically active radiation) or any other light intensity parameter. The system’s three-button wizard simplifies operation so that even non-spectroscopy experts are able to perform fast and accurate measurements.

In addition to the Jaz-ULM-200’s spectrometer and microprocessor, it includes an Ethernet module to store data via an SD card slot and allows users to connect to the Jaz unit via the Internet. The internet capability enables remote measurements such as solar irradiance and the creation of networked sensing modules. Also included are a rechargeable lithium-ion battery module (with SD card slot) for portability and a special mounting fixture for orienting the Jaz stack horizontally to facilitate hands-free operation. Additional system components include a direct-attach cosine corrector for collecting radiation within a 180-degree Field of View, a carrying case with shoulder strap and a rugged Pelican case for storing all related gear. Software includes the Jaz system software and JAZ-A-IRRAD, an irradiance-measurement application that comes on an SD card.