Optoelectronics Information Weekly Selection (July 31-August 6, 2021)

It’s the weekend again, and August has arrived. The following is a selection of optoelectronic information for everyone, please take a look again!

【Industry News】

Nanostructures can record high-order harmonics generated by ultra-high-intensity laser pulses

According to foreign media reports, researchers at Cornell University have developed nanostructures that can convert laser pulses into higher harmonic spectrums. This is a new scientific tool for high-resolution imaging and studying physical processes on the attosecond scale. Paved the way. For a long time, the high-order harmonic spectrum has been used to combine photons in pulsed lasers into one ultrashort photon with higher energy and generate extreme ultraviolet and X-rays for various scientific purposes.

Scientists use graphene nano ink for additive manufacturing of supercapacitors

According to foreign media reports, the research team led by Suprem Das, Associate Professor of Industrial and Manufacturing Systems Engineering at Kansas State University, and Christopher Sorensen, Distinguished Professor of Physics at the University, demonstrated a potential method of manufacturing graphene-based nano-inks with flexible and printable electronics. The form of the product is added to manufacture supercapacitors. Supercapacitors are energy devices that can be quickly charged and discharged within tens of seconds. As researchers around the world study the possibility of replacing batteries with supercapacitors, the team led by Das came up with another prediction.

Researchers develop less invasive optogenetic devices to “illuminate” neuronal activity in the brain

According to foreign media New Atlas, optogenetics is a very promising technology-among other things, it may one day be used to reduce anxiety, treat addiction, and even reverse blindness. A newly developed device will soon be able to greatly reduce its invasiveness, making it more feasible.

Xi’an Opto-Mechanical Research Institute has made new progress in computational optical microscopy imaging research

The team of associate researcher Pan An, researcher Yao Baoli, and researcher Ma Caiwen of Xi’an Institute of Optics and Mechanics published an online publication titled “High-throughput fast full” on the Top Journal of Physics, “Science China-Physics Mechanics & Astronomy” (2020 IF: 5.122) -Color digital pathology based on Fourier ptychographic microscopy via color transfer” Cover Story. This is the first time that Xi’an Institute of Optics and Mechanics has published a cover paper in this journal as a leading unit, marking that my work and achievements in the field of computational optical microscopy have received the attention and recognition of colleagues at home and abroad. (Click here to view the full text)

Scientists use three ingredients to make micron-level self-powered artificial swimming devices

A new study shows that it is possible to use three components to make a self-powered swimming robot with a small body.

Researchers in this project combined oil droplets with water containing detergent-like substances and found that they could create artificial swimming devices that can swim independently and collect energy for charging. Oil droplets use temperature fluctuations in their surrounding environment to store energy and swim.

When cooled, the oil droplet releases a fine line like a tail into the environment, creating friction between the tail and the surrounding liquid, pushing the oil droplet to move. When heated, the water droplets retract their tails, return to their original state, and recharge using the heat in the environment.

Researchers use charged graphene foam as “uranium magnet” for water purification

Is there anything graphene can’t do? MIT researchers have made a reusable filter with graphene oxide foam, which attracts uranium like a magnet, effectively sucking radioactive elements out of drinking water, and found another way for this magical material. One use.

【Theoretical Dry Goods】

“Polarization beat length” in basic optics

The polarization beat length is the period of the interference effect in the birefringent medium. When two linearly polarized lights in different directions propagate in a birefringent medium, their phase changes are different. It is assumed that each polarized wave propagates along a major axis of the medium, so the polarization direction remains unchanged during the propagation process.

Mid-infrared laser light source

The mid-infrared laser light source is a light source that radiates mid-infrared light similar to a laser beam. These light sources usually include a mid-infrared laser or shorter wavelength laser and nonlinear frequency conversion devices.

The mid-infrared spectral region includes wavelengths from 3μm to 8μm. Some people think that the mid-infrared region contains shorter wavelengths, for example, starting from 2μm, which greatly broadens the mid-infrared light source. Typical applications of mid-infrared light sources include gas spectroscopy and military aircraft interference infrared tracking weapons.

This article allows you to master the main repair steps of laser cladding technology

Although the application of laser cladding technology in industry is still in the stage of growth and exploration, with the breakthrough of one by one, the current development speed is relatively rapid, and it has applications in aerospace, automobile, chemical industry, and biomedicine. Laser cladding is a kind of laser additive remanufacturing technology. There are three main forms of industrial manufacturing: additive manufacturing, equal material manufacturing, and subtractive material manufacturing.

A simple list allows you to quickly understand the miniature spectrometer

Spectroscopic instruments are the basic equipment for analyzing and measuring the composition and structure of substances using optical technology, Electronic technology and computer technology. They are widely used in environmental monitoring, industrial control, chemical analysis, food quality testing, material analysis, clinical inspection, aviation Space remote sensing and science education and other fields.

A simple list to understand the performance indicators of the spectrometer

The basis of spectroscopy measurement is to measure the correspondence between optical radiation and wavelength. Generally speaking, the direct result of spectroscopy measurement is a curve composed of many discrete points. The abscissa (X axis) of each point is the wavelength, and the ordinate (Y axis) is the intensity at this wavelength. The performance of a spectrometer can be divided into several categories. Today we bring you a simple list to understand the performance indicators of the spectrometer. I hope to help you!

【product information】

SOLIDWORKS 3D design software

SOLIDWORKS’ intuitive 3D design and product development solutions enable you to conceive, create, verify, communicate, and manage innovative ideas, as well as transform your innovative ideas into excellent product designs.

SOLIDWORKS Premium (Platinum Edition) is a comprehensive 3D design solution that adds powerful simulation, motion and design verification tools, advanced cable and pipe routing functions, and reverse engineering on the basis of SOLIDWORKS Professional (Professional Edition) Functions and many other things.

NIT uncooled mid-wave infrared detector

NIT is a company that manufactures PbSe imaging focal planes and uncooled mid-wave infrared imaging systems. Its products have high reliability, low price, small size, light weight, low power consumption, easy to design portable thermal imaging system, and fast detection rate, suitable for rapid detection.

Near-eye detection lens

Near-eye inspection lenses are needed in the production and inspection lines of AR/VR and other products. This lens is equipped with a C-mount IMX250 2/3” detector combined with a visual image discrimination system to realize automated production and quality judgment, eliminating human error.

The Links:   LQ10D36A LM150X05-B3

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