Ariel | Laser Thermal Power Sensors | Power Sensors - Ophir
Ariel | Laser Thermal Power Sensors | Power Sensors - Ophir
Ariel | Laser Thermal Power Sensors | Power Sensors - Ophir

Ariel

7Z02798
 
描述: 
  • 测量值可达 8.000W
  • 小巧独立,内置显示屏、电池和蓝牙通信
  • 不采用水冷
  • 防尘、防溅
  • 包括用于高功率密度光束的可拆卸漫射器
  • 波长:440-550nm、900-1100nm、2.94μm、10.6μm
  • 14KJ的高热容量,可进行不间断连续测量
  • 仅需3秒即可显示测量值
  • 电池寿命长:超过15小时
  • 两种测量模式:短曝光“脉冲电源”和连续测量
  • 支持电脑和安卓应用

在在“脉冲供电”模式下,Ariel通过测量短时间暴露于此功率的能量,从而测量不超过8kW的高功率工业激光器。将激光器设定为可输送0.05至几秒的脉冲。然后Ariel会测量激光脉冲的能量和持续时间,并计算功率。在连续模式下,Ariel可持续20秒测量不超过500W的功率,或持续测量不超过30W的功率。Ariel是狭小空间的理想之选,如增材制造室,以及生产过程质量控制和研发。

Specification

  • LP2
  • Ø32mm
  • 440-550nm, 900-1100nm, 2.94μm, 10.6μm
  • 200mW-8kW
  • Up to 2.4kJ
  • LP2 absorber: 4% (<2200 nm), 10% (2940 nm), 25% (10.6 µm); With window: 5%; With Diffuser: 25%
  • 70 L x 70 W x 80 D (mm)
  • N.A.
  • N.A.
  • 3 s
  • N.A.
  • N.A.
  • 8kW
  • N.A.
  • CE, UKCA, China RoHS
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FAQ

When an accuracy spec is given, what exactly is meant?

The Ophir specification on accuracy is in general 2 sigma standard deviation. This means, for instance, that if we list the accuracy as +/-3%, this means that 95% of the sensors will be within this accuracy and 99% will be within +/-4%. For further information on accuracy see https://www.ophiropt.com/laser-measurement-instruments/laser-power-energy-meters/tutorial/calibration-procedure and https://www.ophiropt.com/laser--measurement/knowledge-center?search=calibration&=SEARCH

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How do you calculate the power and energy density of a laser beam?

If the power is P and the diameter of the beam is D then the power density is P /(.785 * D2) . If it is a pulsed laser and the energy is E, the repetition rate is R and the diameter is D then the power density is E*R/(.785 * D2), The energy density is E/(.785 * D2). The sensor finder will automatically calculate the power and energy density.

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Does the damage threshold depend on power level?

The damage threshold of thermal sensors does depend on the power level and not only the power density because the sensor disc itself gets hotter at high powers. For instance, the damage threshold of the Ophir broadband coating may be 50KW/cm2 at 10 Watts but only 10KW/cm2 at 300W. The Ophir specifications for damage threshold are always given for the highest power of use of a particular sensor, something which is not done by most other manufacturers. This should be taken into account when comparing specifications. The Sensor Finder takes the power level into consideration when calculating damage threshold.

 Watch the 'FAQ: Does damage threshold depend on power level?' video

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Do I need to recalibrate my instrument? How often must it be recalibrated?

Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.

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Can a laser measurement depend on the distance from the laser to the sensor?

In theory, if a beam is completely parallel and fits within the aperture of a sensor, then it should make no difference at all what the distance is; it will be the same number of photons (ignoring absorption by the air, which is negligible except in the UV below 250nm). If, nevertheless, you do see such a distance dependence, there could be one of the following effects happening:

  • If you are using a thermal type power sensor, you might actually be measuring heat from the laser itself; when very close to the laser, the thermal sensor might be “feeling” the laser’s own heat. That would not, however, continue to have an effect at more than a few cm distance unless the light source is weak and the heat source is strong.
  • Beam geometry – The beam may not be parallel and may be diverging. Often, the lower intensity wings of the beam have greater divergence rate than the main portion of the beam. These may be missing the sensor's aperture as the distance increases. To check that you'd need to use a profiler, or perhaps a BeamTrack PPS (Power/Position/Size) sensor.
  • If you are measuring pulse energies with a diffuser-based pyroelectric sensor: Some users find that when they start with the sensor right up close to the laser and move it away, the readings drop sharply (typically by some 6%) over the first few cm. This is likely caused by multiple reflections between the diffuser and the laser device, which at the closest distance might be causing an incorrectly high reading. You should back off from the source by at least some 5cm, more if the beam is not too divergent.

Needless to say, it’s also important to be sure to have a steady setup; a sensor held by hand could easily be moved around involuntarily, which could cause partial or complete missing of the sensor’s aperture at increasing distance, particularly for an invisible beam.

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How do I set the Ariel to the 8KW range? I only see ranges up to 500W, but the specification says it can measure up to 8KW.

The Ariel has 2 power measurement modes: CW and Short Exposure.

  • In CW mode, it can measure from 200mW up to 500W (up to 30W continuously, and up to 500W intermittently – up to 20 seconds at a time for 500W). The power ranges available in this mode are 500W/ 80W/ 8W.
  • In Short Exposure mode, it can measure up to 8KW, from a short exposure to the high power (typically about 0.3 seconds for the maximum 8KW). The power ranges available in this mode are 8kW/ 800W/ 80W/ 8W. The Ariel does not need water cooling – and is therefore as small as it is - because it is exposed to the very high power beams for only these short “pulses”.

Detailed instructions for how to use the Ariel can be found in a video on our website.

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  • StarLab

    The StarLab application together with an Ophir meter turns your PC or laptop into a full-fledged laser power/energy meter. Supports most Ophir laser power/energy sensors. Up to 8 sensors can be displayed at once on one PC. By using the Ophir COM Object, you can control the device from your own application. Supports the Ariel, Centauri, StarBright, StarLite, Juno, Juno+, Nova II, Vega, Pulsar-1/2/4, Quasar, EA-1 and Ariel devices.

  • StarViewer - Ariel
    StarViewer turns your Android based smartphone into a portable Ophir laser power/energy measurement monitor. It works with Ariel, Juno and Quasar interfaces.
  • Firmware - Ariel

    Embedded Software for Ariel

    Latest Ariel firmware (version 1.29)

    Use StarLab to upgrade the firmware of your device. Press Here for step-by-step instructions.

Videos

Ariel, Ultra-Compact "All in One" sensor for measuring high power industrial lasers up to 8KW. Ariel, Ultra-Compact "All in One" sensor for measuring high power industrial lasers up to 8KW.
FAQ: Thermal Sensors for Measuring Low, Medium & High Laser Powers FAQ: Thermal Sensors for Measuring Low, Medium & High Laser Powers FAQ: Thermal Sensors for Measuring Low, Medium & High Laser Powers

In this short “Basics” video we review the use – and selection - of thermal sensors for measuring low, medium and high laser powers.

Measuring Very High Power Laser Beams: Challenges and Solutions Measuring Very High Power Laser Beams: Challenges and Solutions Measuring Very High Power Laser Beams: Challenges and Solutions

Laser beams with powers of many tens of kilowatts are becoming more and more common in today's applications. This video will discuss the technical challenges in measuring such lasers, and will show you a range of solutions now available

Designed for OEM and end-user applications in closed and confined spaces, such as additive manufacturing, metal cutting, and welding, the Ariel power meter is a robust, battery-powered device that requires no water or fan cooling and is small enough to fit in the palm of your hand. The system measures laser powers from 200mW to 8KW, and at a wide range of wavelengths, including 440-550nm green and blue lasers, increasingly popular in copper welding.

Tutorials

Tutorials and Articles

Laser Power Sensors introduction

As described in the general introduction, the thermopile sensor has a series of bimetallic junctions. A temperature difference between any two junctions causes a voltage to be formed between the two junctions. Since the junctions are in series and the «hot» junctions are always on the inner, hotter side, and the «cold» junctions are on the outer, cooler side, radial heat flow on the disc causes a voltage proportional to the power input. Laser power impinges on the center of the thermopile sensor disk (on the reverse side of the thermopile), flows radially and is cooled on the periphery. The array of thermocouples measures the temperature gradient, which is proportional to the incident or absorbed power. In principle, the reading is not dependent on the ambient temperature since only the temperature difference affects the voltage generated and the voltage difference depends only on the heat flow, not on the ambient temperature.

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Common Reasons for Thermal Sensor Damage or Out of Tolerance Conditions

This document was created to assist our valued customers in the proper care and maintenance of Ophir thermal laser power sensors. The following information is for reference only. If you have any reason to believe that the sensor is no longer performing within the original specifications,we always recommend that you send it in for repair and/or recalibration by our trained technicians to bring the unit back to the proper NIST traceable standards. We believe that Ophir thermal sensors can be used for many years without any repairs when used with the proper laser optical setup. We hope that this document will enable you to also enjoy the long life and reliable results for which Ophir-Spiricon is known.

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How to Properly Select a Laser Power or Energy Sensor

The selection of a sensor to accurately measure the power of a laser or energy of a pulsed laser can seem like a simple and easy procedure. However, many times the selection process is limited to choosing a sensor that only meets the range of power or energy to be measured, leaving out several other essential criteria of the laser specifications; that without their consideration, can allow the wrong sensor to be selected, the laser to be measured inaccurately and likely to cause the sensor to fail prematurely.

Watch Our Laser Measurement Video

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Calibration Accuracy of Ophir’s High Power Sensors

An explanation of how we do this is provided below (A). In addition, a recent check of Ophir’s 5000W head by PTB in Germany shows excellent agreement between our calibration and their standards. The details of the correspondence between our sensor and their standard at powers up to 1400W is included here (B).

A. High Power Measurement Calibration Method and Estimated Accuracy of Models 5000W and 10K-W

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How Much of the Power Sensor Aperture Can My Laser Fill Up?

The entire aperture senses power, so you can use the whole head. That said, a beam in the inner 50% of the surface area (about 70% of the diameter) is specified by Ophir to be uniform within +/-2%. The sensitivity around the edges might be a little less, but generally the sensitivity doesn’t vary by more than +/-2% over the entire aperture.

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Effect of Ambient Conditions on Laser Measurements

We are often asked about the specified ranges of various ambient conditions (temperature, humidity, etc.) for Ophir instruments. In this article we will clarify the effects of these conditions on laser measurements, so you’ll be able to use your Ophir laser measurement instrument effectively.

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How to Use Water Cooled Ophir Sensors

Ophir water cooled sensors are designed to measure high powers in a relatively compact package. In order for the sensor to operate properly, the water flow rate, temperature and temperature stability have to be in the right range. For best performance of the sensor, the water flow rate should be the recommended rate. If the user system is not able to reach the recommended rate, then the minimum rate can be used and the sensor will meet spec but there may be some degradation of response time and linearity... 阅读更多...

Ophir Power/Energy Meter Calibration Procedure and Traceability/Error Analysis

This document discusses the interpretation and basis for stated measurement accuracy of Ophir Laser Power/Energy meters.
1. General Discussion
2. Combination of Errors and Total Error
3. Analysis of Power and Energy Calibration Errors
4. Detailed Analysis of Power and Energy Calibration Errors

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Laser Measurements in Materials Processing: How and When They Absolutely, Positively Must Be Made

19th century British physicist and engineer William Thomson, 1st Baron Kelvin, was the first to say, “If you can’t measure it, you can’t improve it.” When applying this principle to improving laser-based processes, there are a variety of parameters that must be measured. Given the continuously rising power of laser systems in material processing, the requirements for measurement systems are more challenging than ever. Which technologies are available to measure high-power lasers? How often should they be measured? What measurements should be tracked? When this data is collected, what should be done with it? 阅读更多...

How do I know what range, or scale, to set my power/energy meter to? And what happens if I go over range?

Each given range represents one level of gain of an internal amplifier. The electronics, as always, have a limited Dynamic Range. If the measured signal is too low, in other words near the bottom of the range, then it may be lost in the noise and the reading will be inaccurate and noisy. If it’s too high – there may be saturation issues. To give an instrument a usefully wide dynamic range, multiple scales or ranges are used. Switching from range to range can be automatic (“Autorange”), or manual. Autoranging simply starts automatically at the least sensitive range and works its way down the ranges, sampling the signal as it goes, till it finds a range at which the signal is properly detected. Note, by the way, that only in POWER mode is Autoranging available. If we are working in Single Shot Energy mode, there is no Autoranging – simply because when we are measuring a single pulse, the instrument has no opportunity to work its way down the ranges as in Power mode.

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Types of power / Energy Laser Sensors General Introduction

Power and Single Shot Energy Sensors
Ophir provides two types of power sensors: Photodiode sensors and Thermal sensors. Photodiode sensors are used for low powers from picowatts up to hundreds of milliwatts and as high as 3W. Thermal sensors are for use from fractions of a milliwatt up to thousands of watts.
Thermal sensors can also measure single shot energy at pulse rates not exceeding one pulse every ~5s.

Repetitive Pulse Energy Sensors
For higher pulse rates, Ophir has pyroelectric energy sensors able to measure pulse rates up to tens of KHz. These are described in the energy sensor section, section 1.3.

 阅读更多...

5 Situations Where Laser Performance Measurement is Necessary

Measuring the performance of a laser has possible for a number of years and is accomplished with a variety of techniques. These electronic laser measurement solutions give the laser user more relevant, time-based data that shows trends in laser performance rather than single data points. While these solutions have provided laser users with the ability to present data in a simple and easy to understand manner, the application of the data still seems to be unclear to many laser users. 阅读更多...

Accessories

Customers that purchase the above items also consider the following items. Ophir-Spiricon meters and sensors include a standard manufacturers warranty for one year. Add a one year Extended Warranty to your meter or sensor, which includes one recalibration.
  • USB Cable for Ariel

    7E11206

    USB-A to USB-C cable (1 unit supplied with Ariel)

  • USB Power Supply

    7E05088

    Power Supply AC/DC 5V 2.1A with USB-A socket (1 unit supplied with Ariel)