Market Wire: Peripheral Vision, Inc. introduces its ISOLIGHT light metering system that improves the quality and constancy of camera test images. It is important that test charts be evenly illuminated when capturing images; uneven illumination introduces error in measurements. Today's standard approach of using a hand-held light meter presents several problems, including shadows, distortion and difficulty in adjusting lights or positioning the meter. ISOLIGHT eliminates these issues by allowing a single person to continuously measure and monitor the absolute illumination level and uniformity without an assistant, ensuring that testing is accurate and well documented.
The ISOLIGHT light metering system consists of a holder for a test chart, four light sensors positioned at the chart corners and two different displays indicating the light level at each sensor. An LCD displays the light level as measurements or as bar graphs. Multi-color LED rings around each sensor simultaneously indicate whether the illumination at each sensor is too high, too low or within acceptable tolerances. A key feature is that the chart's readout displays are visible in the test images, making it easy to verify that illumination was both at the correct level and acceptably uniform. Finally, a 100 LED chaser bar lets the user measure the image exposure time, frame rate, dropped frames and frame-rate jitter. Synchronized audio output enables testing of audio/video capture synchronization.
ISOLIGHT is colored an industry-standard 18 percent gray to prevent distorting test scene color and camera performance. It safely holds standard-sized color test charts, as well as larger and smaller charts. The device offers multiple mounting options including tripod, wall hanging, table-top use and integral magnets for mounting to light booth walls.