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緑色レーザーモジュール

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緑色レーザーモジュール

NIST Study Will Help Industry Understand and Use Laser Welding

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NIST Study Will Help Industry Understand and Use Laser Welding

GAITHERSBURG, Md., May 2, 2019 — A better understanding of the interaction between laser and metal could give industry more control over laser welding, according to a three-year study in laser welding conducted by the National Institute of Standards and Technology (NIST). The data that NIST scientists collected is being used by computer modelers to improve simulations of laser welding processes, a step toward applying the results of the study to industry.

The goal of the NIST team is to build a firm foundation for a model for laser welding that will help manufacturers determine which combination of laser settings will produce the best weld for their application. The NIST researchers are measuring everything that a simulator will need to model the outcome of a weld — the amount of power that is hitting the metal, the amount of energy the metal is absorbing, and the amount of material that is evaporating from the metal as it is heated — all in real time.

Inside NIST’s laser welding booth, a high-power laser melts a piece of metal to form the letters “NIST.” Courtesy of Paul Williams/NIST.

“Our results are now mature enough to where academic researchers are starting to use our data to thoroughly test their computer models in a way that they just haven’t been able to do before, because this kind of data hasn’t been available,” said physicist Brian Simonds.

Many of the techniques the researchers are using to collect the data were created at NIST to measure novel aspects of welding. To gauge laser power during a weld, the researchers designed and built a device that uses the pressure of the laser light to measure the power of the laser. To sense the amount of light absorbed by the heated material as it undergoes changes, they surrounded the metal sample with a device called an integrating sphere, which was designed to capture all the light bouncing off the metal. Using this technique, the researchers discovered that the traditional method for making this measurement underestimates the amount of energy absorbed by the metal during a laser weld. The integrating sphere also allowed the data to be measured in real time.

The team also devised a way to measure the weld plume using laser-induced fluorescence (LIF) spectroscopy. To detect the tiny amounts of elements that evaporate out of the sample during welding, the researchers hit the plume with a second laser that targeted one kind of element at a time. The targeted element absorbed the second laser’s energy and then released it at a slightly shifted energy, producing a strong signal that is also a unique marker of that element. So far, the researchers have demonstrated that LIF can sense trace elements in the weld plume with 40,000× more sensitivity than traditional methods.

All of the experiments are being conducted with a type of stainless steel that is a NIST standard reference material. Use of a standard reference material ensures that experiments conducted anywhere in the world will have access to metal samples with a composition identical to those used by the NIST team.

The NIST researchers said that a multikilowatt laser beam can heat a smaller area of the metals being joined, creating a smaller, smoother seam than a conventional weld, and that laser welding is faster and more energy-efficient than conventional welding. Even with these and other advantages, laser welding makes up only a small fraction of overall welding efforts in the U.S. that could benefit from this technique. A better understanding of the process could make it easier for industries to consider investing in laser-welding infrastructure, the researchers said.

The NIST scientists are collaborating with institutes around the world to expand the data set. They will collaborate with the U.S. Department of Energy’s Argonne National Laboratory to take advantage of that lab’s ability to do high-speed x-ray imaging of the molten pool of metal in real time. Other collaborators include Graz University of Technology, Queen’s University, and the University of Utah.

The researchers are also broadening the scope of their work by directing their high-power laser beams onto metal powders. The powder studies could directly support the community of additive manufacturing, a market worth more than an estimated $7.3 billion in 2017.

The research was published in Applied Optics, a publication of OSA, The Optical Society (https://doi.org/10.1364/AO.58.001239); in Physical Review Applied (https://doi.org/10.1103/PhysRevApplied.10.044061); and in Procedia CIRP (https://doi.org/10.1016/j.procir.2018.08.072).

To learn more about laser welding, register for a free Photonics Media webinar, Laser Source Selection for Microwelding Applications, on June 25, 2019, 1 to 2 p.m. EDT.

#Laser Welding

Navy to Develop Laser that can Destroy Small Boats

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Navy to Develop Laser that can Destroy Small Boats

The U.S. Navy is developing a laser weapon system that can destroy small boats and hostile drones, as well as provide long-range counterintelligence and surveillance. The first system is scheduled to be installed on a guided missile destroyer sometime in 2020

The United States Navy is moving forward with a new laser weapon system that can “disable” or “destroy” small boats or hostile drones. Lockheed Martin is responsible for developing a system that can strike multiple targets at the speed of light in an ever-changing world of warfare.

The Department of Defense has awarded Lockheed Martin a $150 million contract to develop different types of laser systems that will be installed and tested on the guided-missile destroyer Arleigh Burke (DDG-51), which is the lead ship in a class of 60 destroyers.

The laser system is called a High Energy Laser and Integrated Optical-dazzler with Surveillance (HELIOS) system, which will be fixed on surface ships. Lockheed Martin vice president Michele Evans, the general manager of the company’s Integrated Warfare Systems and Sensors, said this one-of-a-kind weapon helps add another layer to the Navy’s defense capabilities.

“The HELIOS program is the first of its kind, and brings together laser weapon, long-range ISR and counter-UAS capabilities, dramatically increasing the situational awareness and layered defense options available to the U.S. Navy,” Evans said in a statement. “This is a true system of capabilities, and we’re honored the Navy trusted Lockheed Martin to be a part of fielding these robust systems to the fleet.”

The laser system will actually combine different capabilities, from destroying attack boats to conducting long-range surveillance and counterintelligence, according to Lockheed Martin’s website.

One part is a high-energy laser system that can knock out hostile drones or small boats, with the ability to disable or destroy them, using 60-150 kilowatts of steady power, according to IEEE Technology. Second, there is long-range capability for intelligence, surveillance and reconnaissance (ISR). A third portion of the weapon will be designed to counter unmanned aerial systems. This includes using sensors to confuse cameras and other optics on unmanned drones and other flying objects.

Once the Laser Weapons System (LaWS) is developed and installed on the Arleigh Burke by 2020, there will be multi-layered testing of the system, from cooling, maintenance, how much of the ship’s power it would take and how it would integrate with the rest of the ship’s weapons, whether it’s guided missiles or the Close-In Weapon System (CIWS) also known as the Phalanx — or the R2D2 to those in the fleet.

The LaWS on the Arleigh Burke is scheduled for battle testing by 2021, according to the U.S. Naval Institute.

Rear Adm. Ron Boxall said it’s imperative for the Navy to move forward with LaWS to continue leading the world in cutting-edge warfare.

“We are going to burn the boats if you will and move forward with this technology,” Boxall said in the Naval Institute report. “The problem I have today is the integration of that system into my existing combat system. If I’m going to burn the boats, I’m going to replace something I have today with that system doing that mission with these weapons. If I have this system that can kill and I have a system that can actually sense, then I have to make sure it integrates with the other things I have on my ship that can sense and kill, namely the Aegis weapon system.”

Boxall called it a “crawl, walk, run approach,” meaning to start on a simplistic level and working its way up to more sophisticated laser warfare defense.

This isn’t the Navy’s first foray into using laser systems aboard a surface ship. In 2014, the Navy implemented a 20-kilowatt system on the USS Ponce, a former amphibious port dock ship that has since been decommissioned. That system was designed to deter small boats and drones.

Laser diode

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Laser diode

Homemade Laser Maze

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Homemade Laser Maze

Here we will make a homemade laser maze. The old laser maze use several laser beam producers, and they also need a special room for lasers, like the following laser maze.

We need a laser module + several mirrors + a light sensor to make a laser maze.

The laser module is Square shape long working 5V DC powered green laser, that means it can be working for several hours. We recommend low power laser for beginners , such as 100mW.

You need a green safety goggles while working on this project.

1) Think about the beam network, that how you want the laser beam goes through the room.

2) Fix the laser module, you need to fix it tightly, as if the laser moves, the laser beam will move.

3) Fix the mirrors through the laser beams step by step.

4) Fix the light sensor at the end of the laser beam

#Laser Maze

USBの再充電可能で赤いレーザーのペン5mWの強力なビームデモンストレーションポイントマジックガイド

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USBの再充電可能で赤いレーザーのペン5mWの強力なビームデモンストレーションポイントマジックガイド

仕様書

レーザー加工システム

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レーザー加工システム

落札者の公示について（レーザー加工システム（備出５４））

１　案件名レーザー加工システム（備出５４）

２　調達物品名及び数量レーザー加工システム　一式

#レーザー加工システム

Picosecond Laser

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Picosecond Laser

News for Picosecond Laser

Gain-switched laser diode seeded TDFA with 409 W picosecond pulses and 142 W spectrally flat supercontinuum output

#Picosecond Laser

ーザー保護ゴーグル保護安全メガネOD + 4

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ーザー保護ゴーグル保護安全メガネOD + 4

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Sony 405nm 25mw brand

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Sony 405nm 25mw brand

Features

Wavelength:405nm(Typ.) Output power:20mW Threshold cument:lth=26mA(Typ) Package:5.6mm With PD

Applications

Laser module Industrial Use

Absolute Maximum Ratings

Parameter Symbol Ratings Unit Light Output Po(CW) 35 mW Reverse Voltage(LD) VR 2 V Operating Temperature Topr 0 to +75 ℃ Storage Temperature Tstg -40 to +85 ℃

Passively Q-switched lasers

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Passively Q-switched lasers

Laser diode

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Laser diode

Compact laser diode array based on epitaxially integrated AlGaAs/GaAs heterostructures

ESD power inductors such as ADAS and powertrain

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ESD power inductors such as ADAS and powertrain

11-W 2.05-µm Holmium Fiber Laser Pumped by 1.13-µm Ytterbium Fiber Laser

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11-W 2.05-µm Holmium Fiber Laser Pumped by 1.13-µm Ytterbium Fiber Laser

FemtoLaser-Second Fiber Laser-50

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FemtoLaser-Second Fiber Laser-50

FemtoLaser laser is based on all fiber femtosecond laser architecture, modular design, suitable for industrial 7×24 hours High power ultrafast fiber lasers designed and developed for production needs and cutting-edge scientific research. FemtoYL -50 can mention The total power for >50W, the minimum pulse width of 400fs, the pulse energy of >100uJ and 25kHz-5MHz spirit. Live repetition rate. It has good spot pattern and high pulse energy stability, and can be applied to micro nano machining of materials. It shows material cutting, brittle material cutting, MEMS production, integrated photonics, and many other fields.

Product application: OLED module cutting. Full screen cutting Sapphire, ceramic plate cutting Processing of composite film materials Semiconductor wafer processing Diaphragm cutting of lithium battery Diamond processing Product characteristics: Average power >50W Pulse width ~400fs-~6ps adjustable Peak power >250MW 25kHz-5000kHz adjustable Pulse energy >100 mu J High beam quality: M <1.3 Support Burst pulse train function.

femtosecond Laser Manufacturers-C

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femtosecond Laser Manufacturers-C

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