Phosphorescence of Safety Chemicals
Authorities today face an evolving landscape of safety challenges. Ocean Optics teams with officials to deliver fast, accurate detection solutions for safety and security. In this demo, we use our super-fast Ocean FX spectrometer and high-power LED light sources with controller to measure both steady-state and time-resolved photoluminescence of phosphors. These materials are important for life-saving uses including safety markings in buildings and on highways.
Hardware used in the phosphorescence demo includes LSM-405A, LSM-365A, LDC-1, QR400-7-VIS-NIR, OCEAN-FX-XR1 and a STAGE, or a fixture accessory for securing the probe above the sample.
What is phosphorescence?
Phosphorescence is a type of photoluminescence in which a substance's glow is triggered by light. Phosphorescence is similar to fluorescence, except that phosphorescent light can re-emit light for more extended periods of time.
Examples of phosphorescent materials include wristwatch and clock dials, paint, glow-in-the-dark toys and stickers that glow after being charged with a bright light. Typically, the glow fades out in small increments, sometimes up to a few hours or within a few minutes in a dark room. Using the photoluminescence of phosphors, you can have a clearly marked exit sign that can last for long periods of time even though there is no power, which is critical to saving lives.
ASTM standards require equipment that can measure photoluminescence in both a steady-state and a time-resolved manner.
Benefits of our super-fast Ocean FX spectrometer and high-power LED light sources with controller
In addition to the safety and egress lighting applications for these phosphorescent compounds, there are new biomedical applications for these compounds. The speed and versatility of our light sources and spectrometers offer reliable solutions for safety and security.
Timestamps:
[0:14] High-speed phosphorescence characterization using high broadband speed spectral devices
[0:55] Various inorganic powders with rare earth elements in high-speed, microsecond-level acquisitions
[1:16] Materials used include our super-fast Ocean FX spectrometer and high-power LED light sources with controller
[2:36] Taking a look at the software and seeing a clear, strong emission around 560 nanometers
[3:00] Alter the wavelength by changing a simple plug on the LED module
[4:30] What are time-resolved measurements?
[5:20] How we change the waveforms, frequencies and duty cycles, and what that looks like in the software
[6:35] Looking at a square wave at 20% using a 365 nanometer LED
[8:17] Burst Mode acquires spectral data at super-fast rates
[10:12] A square waveform with 20 Hz frequency and 50% duty cycle is useful for measuring decay
[11:13] What happens when we hit the start button on the sine wave
[11:54] A sine waveform with 20 Hz frequency is suitable for measuring phase shift
[12:55] Quantify the phosphorescence of the featured compounds, whether you're looking at decay time using a square wave or phase shift using a sine wave
Learn More:
https://www.oceanoptics.com/spectrome...
Contact us: https://www.oceanoptics.com/contact-u...
Subscribe to our YouTube channel for more spectral knowledge: / @oceanoptics
Follow Ocean Optics on social media:
Facebook: / askoceanoptics
LinkedIn: / ocean-optics
Instagram: / ask_oceanoptics