Optical Radiation Calibration
by Bob Angelo Rather than a step by step how to guide, the goal of this article is to provide a broad overview of the terms, instrumentation, applicable SI units, methods and just a few […]
optical
You never know, you know… ?
by Dan Wiswell As a collector of antique test equipment, I have visited many antique shops over the years with the hope of stumbling upon something good. A few decades ago, there were plenty of […]
DCP Test Station for UV LED Radiant Power Measurement
September 2024 – Amesbury MA USA The DCP-Differential Continuous Pulse test station includes Gigahertz-Optik’s TV-UV10 fluorescence-free Integrating Sphere Spectroradiometer, Vektrex’s pulsed SMU Source/Measure Unit with the DCP method of measurement implemented in supplied application software […]
From Pandemics to Pedicures: NIST Rebuilds World-Class UV Calibration System | NIST
NIST News, July 22, 2024 Ultraviolet (UV) light may seem like an invisible hero, quietly disinfecting our hospitals, curing our nail polish, and killing pathogens in our water. But how can we be sure it’s […]
First results from DESI make the most precise measurement of our expanding universe | University of California
April 11, 2024, Mike Peña, UC Santa Cruz We now have the largest 3-D map of our cosmos ever created, thanks to a powerful instrument mounted atop a telescope in Arizona with a robotic array […]
Researchers develop a new type of frequency comb that promises to further boost the accuracy of time keeping | NIST
March 14, 2024 Chip-based devices known as frequency combs, which measure the frequency of light waves with unparalleled precision, have revolutionized time keeping, the detection of planets outside of our solar system and high-speed optical […]
NPL makes history with first UK optical clock to contribute to determining International Atomic Time – NPL
Calculating TAI is a major resource for determining Coordinated Universal Time (UTC), the shared international reference time scale that countries worldwide use to synchronise clocks. Without UTC in place as the world’s agreed consistent time-base, […]
Gigahertz-Optik LED Calibration Standard
In photometry and colorimetry, standard CIE illuminant A tungsten-filament light sources have exclusively been used as calibration standard sources since 1932. As LEDs increasingly replace traditional lighting new means and methods of calibration are needed […]