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This section provides an overview for laser doppler speedometers as well as their applications and principles. Also, please take a look at the list of 15 laser doppler speedometer manufacturers and their company rankings. Here are the top-ranked laser doppler speedometer companies as of December, 2024: 1.RPMC Lasers, Inc., 2.ELOVIS GmbH, 3.Ono Sokki.
Table of Contents
Laser Doppler Speedometer is a device that measures the velocity of an object using the Doppler effect of laser light. A laser beam is shined onto the object to be measured, and the velocity of the moving or rotating object is measured. Advantages of Laser Doppler Speedometers include high resolution and the ability to detect the direction of rotation, such as reverse rotation.
Laser Doppler Speedometers are also called Laser Doppler Velocimeters when the object being measured is a gas or liquid. Laser Doppler Speedometers measure flow velocity by shining a laser beam on tiny droplets of water or other substances mixed into the gas or fluid flow.
Laser Doppler Speedometers are used to measure the speed of moving objects such as belts, and rotating objects such as rolls, motors, and gears. They are also used to detect the opening and closing of elevators. Objects to be measured include paper, building materials, aluminum foil, cables, cheese (food), steel plates, and many others.
Applications of laser Doppler anemometers range from basic fluid dynamics research to industrial measurements of flow around objects such as aircraft, ships, and automobiles. Examples include wind experiments to analyze the aerodynamic characteristics of vehicles and aircraft, and the analysis of the flow of fuel, air mixtures, and exhaust gases in engines.
Both Laser Doppler Speedometers and velocimeters utilize the Doppler effect. The Doppler effect is a phenomenon in which the frequency of a wave is shifted when the source of the wave, such as sound or light, and the device that observes or detects the wave, or both, are moving. A familiar example in our daily lives is the phenomenon in which the sirens of ambulances and fire trucks are heard with a sudden change in sound when they pass in front of our eyes.
The principle of Laser Doppler Speedometer is that when light is irradiated onto a moving object, the frequency of the reflected light is shifted, and this reflected light is detected and used to determine the speed of the object. Since the shifted frequency is smaller than the light and difficult to detect, the original light source is superimposed on the reflected light.
Other devices for measuring the velocity of fluids include pitot-static pressure tubes and hot-wire anemometers. Compared to these devices, Laser Doppler Speedometers are superior because they do not require calibration, can make non-contact measurements, and can also measure reverse flow.
Laser light has some advantageous features for detecting the Doppler effect. Laser is an acronym for Light Amplification by Stimulated Emission of Radiation. Translated into Japanese, it stands for Light Amplification by Stimulated Emission of Radiation. Laser light has four characteristics not found in ordinary light such as sunlight.
First, it is highly directional. High directivity means that light travels straight in one direction.
Second, it has good coherence. Coherence means that the phases of light are regularly aligned.
The third characteristic is that the wavelength range is very narrow and monochromatic light can be obtained. Finally, it has excellent convergence. Good convergence means that it is easy to focus light to a single point using a lens. When we collect sunlight with an insect-eye lens, paper and other objects burn, but because sunlight has a variety of wavelengths, not all the light is actually concentrated at a single point, even when we think we have focused the light. This is because there is a focusing error called aberration. However, laser light has excellent convergence properties that make it easy to focus light to a single point using a lens.
Laser Doppler Speedometers that measure the velocity of gases and liquids require the inclusion of tiny tracer particles such as water droplets, silicone oil, or titanium dioxide in the flow. To measure the velocity of the flow, a laser beam is shone onto these tracer particles, and the scattered light emitted by the particles is detected to determine the velocity of the tracer particles. Therefore, it is important that the tracer particles follow the flow sufficiently.
*Including some distributors, etc.
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RPMC Lasers, Inc. is an OEM laser supplier founded in 1996 and based in Missouri, USA. The company offers various laser technology products for the photonics industry. These products include fiber or solid-state optical laser amplifiers, wide wavelength laser diodes, and pulsed lasers. It also offers related accessories such as thin disc mount modules and heatsinks, as well as product customization for customers with unique project specifications. The company's products support client manufacturers in the medical, defense and research sectors.
Ono Sokki Co. Ltd., founded in 1954 and based in Yokohama, Japan, is a manufacturer, distributor, and supplier of electronic measuring instruments and control systems. Its products include sound level meters, vibration meters, and FFT analyzers, utilized in research and development, quality control, and by production line engineers, particularly in the automotive industry. The company was the first to be designated by the government as a producer of sound level meters in Japan and also obtained ISO 14001 certification in 1997.
Delta S.A.S., established in 1954 and headquartered in Entzheim, France, is a manufacturer of a wide range of sensors and measuring systems. Some of the products it stocks include laser measuring sensors, hot metal detectors, and stereoscopic width gauges used in various applications like processing lines, hot rolling mills, and continuous casters. The company has been in the steel mill environment for over 70 years and has sold over 40,000 sensors worldwide in more than 70 countries. It is ISO 9001 certified and uses several technologies, including infrared scanning, laser triangulation, and image processing.
Kanomax USA, Inc. (KMUS) is an American manufacturer of air quality monitoring and testing instrumentation established in 2006 as a subsidiary of Kanomax Japan Inc., which was founded in 1951. The company produces sound and vibration meters, indoor air quality (IAQ) monitors, airflow testing equipment, and particle counters for use in HVAC validation or environment testing. They also offer after-sales services including calibration and repair for customers in need of technical support. KMUS serves clients in various industries including the HVAC, construction, medical, and industrial manufacturing sectors.
Business Communications LLC., established in 1976 and headquartered in Dubai, UAE, is a manufacturer of business supplies and equipment area. The company offers the following products and services, including thermal fingerprint development, IR fluorescent fingerprint powders, handheld/portable XRF spectrometry, and S1 titan. It also offers Tracer 5 series, autoclaves, pressure vessels and reactors, and vacuum Furnace. Its product can be used for several chemical reactions and other applications like hydrogenation, catalyst screening, polymerization, and corrosion testing. The company has achieved ISO 9001:2015. It serves industries such as government, food and pharma industries, healthcare, renewable, and more.
Wavelength Opto-Electronic Pte Ltd, founded in the UK, is a supplier of integrated measurement systems for diagnostics and research into fluid mechanics, and solid mechanics. The company offers a diverse array of measurement systems, including high-speed cameras, sensors, data acquisition units, and software solutions, designed for advanced diagnostics and research, and a wide selection of components, such as optical sensors, pressure transducers, force sensors, more, tailored to meet the unique needs of various applications.
DANTEC DYNAMICS A/S, founded in the United States in 2000, is a supplier of test equipment and components. The company offers a diverse array of test equipment, including measuring instruments, test meters, analyzers, and more, designed for accurate data collection and analysis and a wide selection of components, such as sensors, transducers, connectors, and cables, tailored to meet the unique needs of various applications. It also provides engineering services for product development and custom test solutions.
NKT Photonics A/S, established in 2005 and headquartered in Massachusetts, United States, is a supplier of fiber lasers and photonic crystal fibers. The company offers a range of products, including single-frequency fiber lasers, femtosecond lasers, and hollow-core photonic crystal fibers. It also offers optical fibers and modules, including photonic crystal fibers and gain modules. Its fiber lasers have power and beam quality due to the heat dissipation enabled by the fiber's design. The company has a certified quality management system that is certified by the ISO 9001 standard. Its main markets are the Medical, Industrial, Aerospace, Quantum, and Nanotechnology sectors.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | RPMC Lasers, Inc. |
17.0%
|
| 2 | ELOVIS GmbH |
8.5%
|
| 3 | Ono Sokki |
7.8%
|
| 4 | Business Communications LLC |
7.2%
|
| 5 | Kanomax Corporation |
7.2%
|
| 6 | DELTA SAS |
5.9%
|
| 7 | Velocitek |
5.9%
|
| 8 | CN Rood |
5.9%
|
| 9 | Microvec Pte Ltd |
5.9%
|
| 10 | MPH Industries |
5.2%
|
Derivation Method
The ranking is calculated based on the click share within the laser doppler speedometer page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
2 | 25.0% |
|
Singapore
|
2 | 25.0% |
|
Japan
|
1 | 12.5% |
Germany
|
1 | 12.5% |
China
|
1 | 12.5% |
|
Denmark
|
1 | 12.5% |
9 products are listed.
Nihonkai Keisoku Tokki Co., Ltd.
30+ people viewing
Features ◼︎Non-contact measurement Since there is no physical effect on the measured object, it is possible to measure delicate materials and high-...
Nisshinbo Micro Devices Inc.
50+ people viewing
Last viewed: 10 hours ago
■Features ・Moving object detection using 24GHz microwave Doppler ・Antenna ~ Signal processing all-in-one ・Equipped with the optimal algorithm fo...
Nisshinbo Micro Devices Inc.
40+ people viewing
■Features ・Moving object detection using 24GHz microwave Doppler ・Equipped with MMIC with transmitter and receiver integrated into one chip ・Pat...
Nisshinbo Micro Devices Inc.
80+ people viewing
■Features ・Distance/angle/state detection sensor using 60GHz band millimeter waves ・World's smallest class ultra-compact module (10 × 13.4 × 1.2 ...
Nisshinbo Micro Devices Inc.
40+ people viewing
■Features ・24GHz band microwave distance measurement sensor ・Measurement distance of 20m for pedestrians ・Antenna ~ Signal processing all-in-one...
Nisshinbo Micro Devices Inc.
30+ people viewing
Last viewed: 16 hours ago
■Features ・24GHz band microwave distance measurement sensor ・30m range distance/speed measurement module ・3 modes can be selected: FMCW/Doppler/...
Nisshinbo Micro Devices Inc.
80+ people viewing
Last viewed: 3 hours ago
Features ■Standalone NJR4267 evaluation ・NJR4267 can be easily installed directly (no soldering required) ・Power to NJR4267 can be supplied from ...
Mysec Co., Ltd.
40+ people viewing
Measures the speed and length of conveyed objects without contact. ■Features Since it is non-contact, compared to contact type rotary encoders, th...
Tokyo Instruments, Inc
30+ people viewing
■Summary VeloreX PDV™ is a device for measuring continuous velocity-time profiles of fast moving objects. The product can also be used to measure v...
