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What is Particle Image Velocimetry
Particle Image Velocimetry (PIV) is a non-intrusive laser optical measurement technique for research and diagnostics into flow, turbulence, microfluidics, spray atomisation and combustion processes.
Application areas for PIV include:
Wind tunnel velocity experiments for testing aerodynamics of e.g. cars, train, aircrafts, buildings and other objects/structures.
Velocity measurements in water flows (e.g. research in general hydrodynamics, ship hull design, rotating machinery, pipe flows, channel flow etc.).
Spray research where there is a need to measure droplet velocities, cone angles, penetration length etc.
Environmental research (combustion research, wave dynamics, coastal engineering, tidal modelling, river hydrology etc.).
Experimental verification of CFD models
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Measurements of diameters without contact. The haloes present in a Petri dish can be sized with this device only by pushing the reset button in one edge of the spot and moving the holder to the opposite edge of the halo. The display shows the diameter with an accuracy of 0.1 mm.
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The DTS 500 positioning system complements the operation of Instrument Systems spectrometers by providing a route to full automation of measurements. The positioning system is in particular suitable for determining viewing angle dependent properties and spatial homogeneity of display, panel graphics and LED lamp modules. The DTS 500 saves valuable time by eliminating manual alignment and guarantees more exact results with improved reproducibility. Operation of the entire 5-axis system is fully integrated into the SpecWin Pro software. Measurement results can be viewed as luminance and contrast distributions in Cartesian or spherical coordinates with ISO contours lines. Data can additionally be exported in table format to Excel.
The DTS 500 is available in various configurations:
- stand alone XYZ positioning system (e.g. for testing back-lit display and control elements for the automotive and aviation industries)
- stand alone 2-axis goniometer (e.g. for measuring the spatial radiation pattern of lamp modules)
- complete 5-axis system mounted on an optical bench (e.g. for testing LCD displays and entire instrument clusters)
- optional mountings for TOP 200, LumiCam 1300 and LumiCam 4000 available
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The Power Wizard™ power meter from Synrad offers a unique solution to the measurement of laser power and serves as a service tool to ensure maximum laser performance at any time. Designed to measure power levels from 1-250W, the PW-250 provides accurate measurement of average laser power, which is displayed on an easy-to-read LCD screen.
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The QPM Family
Gentec-EO’s QPM Series is a fully automatic laser power probe that calculates laser power by measuring temperature dynamics using a microprocessor. Its measurement and acquisition technique determines the time needed to carry out a measurement. Data acquisition is triggered and stopped by detecting set heat parameter thresholds. This technique is virtually error free and allows for multiple measurements without absorber forced cooling.
Power Range
Six models cover the full-scale powers from 500 mW to 10 kW. Their innovative measurement concept cuts the time to measure and display down to ten seconds on all probe models providing:
# Excellent accuracy (± 3 to 4%)
# Repeatability (± 1 to 2%)
# High resolution
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General description :
Coherent offers the broadest line of laser power meters and laser energy meters available anywhere. In addition, as the world's leading producer of laser systems, we thoroughly understand the practical requirements and challenges of using laser measurement tools. This puts Coherent in a unique position to configure a laser measurement system that provides the right combination of performance, features and cost for your particular needs. The modularity of the Coherent system also ensures that your investment will be protected as your needs evolve or change.
Our standard product line consists of four types of meters:
- Laser Power Meters
- Laser Energy Meters
- Laser Power and Energy Meters
- OEM Power and Energy Modules
Power-only and energy-only meters offer simplicity and economy. However, certain advanced capabilities are only available in dual (power and energy) meters, so these products should be considered, even if your use is purely for a single measurement type (power or energy).
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Melles Griot offers a wide variety of power and energy meters. Our integrated, broadband power meter uses thermopile technology, has a flat response from 200 nm to 20 µm, and can measure output power from 10 µW to 2 W. Our modular power meter system is based around two control units and a plethora of calibrated, interchangeable, thermopile, semiconductor, and pyroelectric detector heads capable of measuring cw and pulsed output power ranging from a few picowatts to 50 watts.
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Features
-NIST traceable calibration
-Measures power and wavelength with ILX Power/Waveheads
-Integrating sphere-based power measurements
-Measurement heads cover a wide wavelength range from 350 to 1700nm
-Power measurement up to 10W
-Free-space and fiber measurement heads
-Easy test system integration with standard GPIB interface
The OMM-6810B is the only power meter capable of measuring the optical power and wavelength of semiconductor lasers including short wavelength lasers, high power pumps, and fiber lasers. A variety of measurement heads cover wavelength ranges from 350 to 1700nm for power only or power and wavelength measurement.
In addition to precision power and wavelength measurements, the OMM-6810B is loaded with standard features such as log/linear display modes, auto ranging, user calibration, and reference measurement capability. All of these features plus an analog output and IEEE-standard GPIB interface combine to make this instrument a cost-effective laser diode development or production test tool.
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Multichannel optical power meter with internal individual power meter modules for concurrent data acquisition with higher data acquisition rate.
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Bi-Directional Insertion Loss Test System or multi-mode or single mode with either singlemode or multimode internal source.
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The SOLO 2 is our next generation SOLO monitor; making it our most complete handheld power and energy meter. You will find all the useful functions you liked on the SOLO PE, with improved performances and speed. Take a look at the main features of the SOLO 2:
# Reads both power and energy detectors
# Fast 200 Hz data transfer rate
# Reads fast energy detectors up to 3 kHz
# Large 78 x 58 mm LCD screen with backlight
# Full statistical functions in real time
# Unequalled 225 000 points data storage
# Fast prediction algorithm for accelerated power measurements
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Fastest Monitor in our Product Range!
The S-LINK-2 is Gentec-EO’s first Multi-Channel, PC-Based, Power and Energy Monitor. Faster than any other monitor in our product range, with 10 kHz of REAL TIME data transfer for each channel, with no missing points. That’s right, you get every single pulse transferred directly into your PC, at 10 000 times per second!
Features
# 2 Channels
# Reads Pyroelectric Metallic Absorbers up to 6 kHz
# Real Time data Transfer of 10 kHz/Channel, No Missing Points or Averaging!
# Communication Through USB or Ethernet
# True measurement of RMS & PTP Stability, Repetition Rate and # of Pulses with Pyroelectric Detectors
# External Trigger
# Compact Design
# Competitive Price
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OAI's Model 306 UV Power Meter is a highly reliable direct reading Instrument designed expressly for measuring light intensity at the wafer plane of mask aligners, UV curing light sources, and any other UV light source. Special probes enable measurement of light in the visible range. Calibration accuracy is within +/- 3% and is NIST traceable. Measurement repeatability is within /- 1%. It is auto ranging from 0.1 to 1999 mw/cm2 full scale and has 1% linearity in this range. This instrument features meter to meter matchability.
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These UV power meters are designed to measure and monitor the absolute optical power (mW/cm2) in the UV to vacuum UV region. These UV meters allow accurate UV measurement and control based on NIST standards for applications such as surface reforming and UV sterilization using excimer lamps or low-pressure mercury lamps, UV curing and semiconductor photolithography. UV power meters come with 6 types of sensor heads according to the wavelength needed.
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