#850nm

[f1mike28]

AMG G63 4x4² „Nuthin but a G thang“.

The AMG G63 4x4² brings driving performance to the segment of unadulterated off-road vehicles in unexpected form.

The AMG 4.0-litre V8 biturbo engine generates 430KW (585HP) in this model, and delivers a maximum torque of 850Nm. This is available across a wide rev range between 2.500 and 3.500 rpm, and provides a sense of effortless superiority. It absolves a sprint from zero to 100 km/h in 5 seconds.

The two turbochargers are not positioned on the outside of the cylinder banks, but inside the cylinder „V“. Advantages: a compact engine design, spontaneous response of the turbochargers and low exhaust emissions thanks to optimal airflow to the near-engine catalysts. The eight-cylinder delivers its power with muscular torque in all engine speed ranges, combined with maximum efficiency for low fuel consumption and emission figures.

Two twin scroll turbochargers are used for optimal response.

The housing is divided into two parallel flow channels. Combined with two separate exhaust ducts in the exhaust manifold, this makes it possible to control the exhaust gases on the turbine wheel separately. The exhaust gas from the first and fourth cylinders of the cylinder bank is fed into one duct, that from the second and third cylinders to the other duct.

The aim is to prevent the individual cylinders from having mutually adverse effects on the gas cycle. This reduces the exhaust gas back pressure and improves gas exchange. The results are increased output, more torque at low revs and very fast response times.

Mercedes-AMG One man, one engine Handcrafted by Michael Kübler @f1mike28 in Germany Affalterbach. Driving Performance is our Passion!

Mercedes-AMG the Performance and Sports Car Brand from Mercedes-Benz. Mercedes-AMG Handcrafted by Racers.

[otamarek]

Lamborghini Urus 4.0V8 478kW 650Ps 850Nm 305km/h

[daphnedauphinoise]

I want to try red light therapy so badly!! Please share with us your experience when u try it and if u have any recs, I'd appreciate it a lot ❤️

I will give you an update in like 12 weeks time ( I have put it in my calender)

What I want to make crystal clear is that red light therapy should not be expensive. Its coloured light, albeit at a specific wavelength but coloured light nonetheless. When you look to buy red light products or any light therapy, you have to make sure you get the correct one wavelength. For red light, its 630nm to 700/850nm. The papers I have read seem to hinder between 700-850 so the one I got is closer to 630.

Like I said, there is no reason to be forking out hundreds to thousands of pounds for this. Literal chicken light works as well.

D x

[suntelecomcn]

Closer Look at 400G QSFP-DD Optical Transceiver Module

Recent years have seen the evolution towards the 5G, Internet of Things  (IoT), and cloud computing, increasing pressure on data centers to ramp up both network capacity to 400G and driving providers to search for new solutions to achieve their 400G Data Center Interconnects (DCIs). 400G QSFP-DD optical transceiver module is becoming one of the most popular cutting-edge 400G DCI solutions. This article will provide a basic understanding of QSFP-DD optical transceiver modules.

What is the QSFP-DD Optical Transceiver Module?

Quad small form-factor pluggable-double density (QSFP-DD) is designed with eight lanes that operate at up to 25 Gbps via NRZ modulation or 50 Gbps via PAM4 modulation. It supports data rates of 200 Gbps or 400 Gbps and doubles the density. QSFP-DD is backward compatible with current 40G and 100G QSFPs. It is compliant with IEEE802.3bs and QSFP-DD MSA standards. QSFP-DD is available in single-mode (SM) and multi-mode (MM) fiber optic cables and includes digital diagnostics monitoring (DDM) to monitor parameters such as power, temperature, and voltage.

Types of 400G QSFP-DD Optical Transceiver Module

400G SR8 QSFP-DD 

400G SR8 QSFP-DD optical transceiver module is suitable for short-distance interconnection or multi-channel data communication. The transmission rate is up to 425Gbps, and the central wavelength is 850nm. The transmission distance is up to 70m or 100m through multi-mode OM3 and OM4 fiber.

400G DR4 QSFP-DD

400G DR4 QSFP-DD optical transceiver module achieves the transmission over single-mode fiber (SMF) with an MPO-12 connector. It supports a max transmission distance of 500m on SMF.

400G FR4 QSFP-DD

400G FR4 QSFP-DD optical transceiver module supports link lengths of up to 2km SMF with a duplex LC connector. It uses wavelength division multiplexing(CWDM ) technology, eight channels of 53Gbps PAM4 signals on the electrical side, and four channels of 106Gbps PAM4 signals on the optical side, which is twice the rate of the electrical side.

400G LR4 QSFP-DD

400G LR4 QSFP-DD optical transceiver module is designed with a built-in Gearbox chip that multiplexes the two channels' electrical input data into a single-channel outputs signal and then modulates it to the optical receiver end. The digital signal processor (DSP) basis gearbox converts eight channels of 25GBaud PAM4 signals into four channels of 50GBaud (PAM4) over an SMF cable with duplex LC connectors. It supports a transmission distance of up to 10km.

400G LR8 QSFP-DD

The 400GBASE-LR8 optical transceiver module supports link lengths of up to 10km over a standard pair of G.652 SMF with duplex LC connectors.

 400G ER8 QSFP-DD

The 400G ER8 QSFP-DD optical transceiver module supports link lengths of up to 40km over a standard pair of G.652 SMF with duplex LC connectors.

400G ER4 QSFP-DD

400G ER4 QSFP-DD optical transceiver module supports link lengths of up to 40km over a standard pair of G.652 SMF with duplex LC connectors. It has only four wavelengths for 4 LAN WDM channels 1295.56/1300.05/1304.58/1309.14nm.

Advantages of 400G QSFP-DD Optical Transceiver Module

Backward compatibility: Allowing the QSFP-DD to support existing QSFP modules (QSFP+, QSFP28, QSFP56, etc.). It provides flexibility for end-users and system designers.

 Adopting the 2x1 stacked integrated cage/connector to support the one-high cage connector and two-high stack cage connector system.

SMT connector and 1xN cage design: Enable thermal support of at least 12W per module. The higher thermal reduces the requirement for heat dissipation capabilities of transceivers, thus reducing some unnecessary costs.

ASIC design: Supporting multiple interface rates and fully backward compatible with QSFP+ and QSFP28 modules, thus reducing port and equipment deployment costs.

Applications

400G QSFP-DD optical transceiver module is used in 400G Ethernet, data centers, telecommunications networks, cloud networks, Infiniband interconnects, high-performance computing networks, 5G, 4K video, IoT, etc.

Conclusion

400G QSFP-DD optical transceiver module offers high speed, performance, scalability, and low power in 400G Ethernet. Sun Telecom specializes in providing one-stop total fiber optic solutions for all fiber optic application industries worldwide. Contact us if any needs.

[thethingything]

so Lucy remembered that as a teenager we really wanted to try near infrared photography, and we finally got some filters and stuff for it.

we're going to get a full spectrum converted camera eventually but in the meantime these were taken with an 850nm filter over our phone camera

and then this one where we played around more with the post-processing on it

we also have a few taken with a 590nm filter but we're figuring out what to do with those

[skopjemusic]

Whitby & Scarborough- Infrared 850nm By Skopta Photography #infrared850nm #infrared #infraredphotography #creativeir #infraredworld #whitby #bnw #infraredphoto #irphotography #scarborough #landscape #infrarouge #infrarosso #infraredlandscape #infrarot #lifepixel #flir #infraredcamera #thermalimaging #infraredsauna #landscapephotography #creativeinfrared #bhfyp #yorkshire

[hausofasseveration]

VEVOR Red Light Therapy Pad - 120PCS 3-Chip LEDs, 660nm & 850nm Dual Wavelengths for Pain Relief, Skin Health & Wound Healing - 16.1 x 7.9 Inch

VEVOR Red Light Therapy Pad Experience a new level of wellness with the VEVOR Red Light Therapy Pad, designed to provide effective and convenient therapy for back, shoulder, and neck pain relief. Featuring 120 high-performance 3-chip LEDs, this red light therapy pad offers dual wavelengths (660nm & 850nm) for a multitude of health benefits, including improved skin health and wound healing. Key…

[secondhand81625099]

It's Day 3 of RECOIL's 12 Days of Christmas Giveaways! Enter to Win a Wraith Mini 4-32x32 Digital Riflescope from Sightmark and RECOIL! https://wn.nr/XS7EhNv Hey Friends! It's Day 3 of RECOIL's 12 Days of Christmas Giveaways! Enter to Win a Wraith Mini 4-32x32 Digital Riflescope from Sightmark and RECOIL! If you refer friends you get more chances to win :) https://wn.nr/XS7EhNv

[moko1590m]

2024年11月27日 07時00分 ロボットや自動運転車が周囲を把握するためのツール「LiDAR」の仕組みとは？

Source: Waymo

周囲の状況を把握するために役立つスキャンシステム「LiDAR」は、周囲の状況に応じた処理が必要となる自動運転技術を始め、自律型ロボットや周囲をスキャンする3Dアプリなどさまざまな分野に使用されています。そんなLiDARの仕組みがどうなっているのかについて、エンジニアリングが専門のヴィクラム・セカール氏が解説しました。

A Short Introduction to Automotive Lidar Technology https://www.viksnewsletter.com/p/short-intro-to-automotive-lidar

LiDARはLight Detection And Ranging(光検出と測距)の略で、赤外線レーザー光を使って離れた物体までの距離を測定する方法です。この技術は新しいものではなく、長年にわたり植生研究や都市地形、隠された遺跡、建築物、拡張現実の画像化など多岐にわたり使われてきました。

LiDARが特に優れているのは、既存のレーダー技術よりもはるかに優れた高解���度の画像を生成できる点です。LiDARとレーダーは基本的に似たような動作をしますが、レーダーがマイクロ波(波長1cm～1m)を使用するのに対し、LiDARはレーザー光(波長380nm～750nm)を使用するという違いがあります。

LiDARは主に電磁スペクトルの赤外線領域を使用し、905nm(近赤外線)または1550nm(短波赤外線)のいずれかの波長で動作するよう設計されています。どちらを使うかはレーザー光源の出力強度や検出器の感度、同じスペクトル内の自然光や人工光源からの干渉によって決まります。特に太陽光の干渉が強いとされています。

905nmの波長は網膜に吸収されやすく、長時間の照射で損傷を引き起こすという懸念があるため、安全性には厳格な基準が設けられています。こうした波長は太陽光や車のヘッドランプなどと干渉する可能性が高いのですが、とはいえ短い波長ほど一般的に光検出器の感度が高く、光源はより強力で安価なものが使用できるため、905nm帯が好まれる傾向にあります。例えばOusterという企業は湿った環境下での視認性を向上させる特許を取得しており、太陽光の干渉が強いにもかかわらず、850nmを採用したLiDARを開発しています。

一方で1550nmの波長はいくつかの問題を軽減します。太陽放射からの干渉が少なく、この波長は角膜までしか透過しないため目を傷つける可能性が低いとされています。これはつまり、より長い時間、より大きなパワーを使用できることを意味し、より長い範囲で検出することも可能にします。波長1550nmの欠点は、水蒸気による吸収が高いため、湿った環境での使用が難しいことです。

Source: Waymo

LiDARの性能は光源に加えて検出器の精度にも左右されます。

最も一般的に使用される検出器は「アバランシェフォトダイオード(APD)」というものです。APDはシリコン、ゲルマニウム、インジウム・ガリウム・ヒ素といった素材で作られることが多く、素材ごとに波長に対する応答が異なります。例えばシリコン製のAPDは近赤外線によく反応し、安価に製造できるという特徴があり、インジウム・ガリウム・ヒ素製は短波赤外線によく反応する一方で高価です。

LiDARを使った物体距離の検出は測距(レンジング)と呼ばれ、よく使われる2つのアプローチがあります。

1つ目は「直接飛行時間法(dToF)」と呼ばれる手法で、コウモリのエコーロケーションと同じように、信号を発射してから反射した信号が返ってくるまでの時間を測定する方法です。測定可能な最大距離は送信パワーや検出器の感度によって決まりますが、市販のdToFシステムの最大測定範囲はおおよそ100～200メートルです。一般的に、ほとんどのLiDARシステムはこのdToFを採用しています。

2つ目が「周波数変調連続波(FMCW)」です。これは送信する信号の周波数を変調する方法で、同じく信号を送信し、反射した信号を検出するところまではdToFと同じですが、時間ではなく信号の周波数差を検出して距離を測定するというものです。

FMCWを採用したLiDARシステムは、変調するための周波数可変レーザー光源と、送受信信号から情報を抽出するための追加電子回路が必要なため、実装が複雑という欠点があります。しかし、発信する信号の周波数を好きに変えることができるため、別のLiDARシステムからの干渉が少ないというメリットや、dToFに比べてレーザーの最大パワーが低く、特に905nmでは人の目を保護するというメリットがあります。

実際に自動運転車に搭載されるLiDARシステムの1つが、「メカニカル・ライダーシステム」と呼ばれるものです。これは、赤外線レーザーをモーターに搭載し、センサーを回転させることで水平方向に360度の視野を確保し、死角をなくして周囲の状況をスキャンするというもの。Google傘下の自動運転タクシー「Waymo」がこれを採用していますが、モーターを作るのに精密部品が必要で、繰り返し回転させることによる摩耗や損傷の影響を受けるため、高価だという欠点があります。

もう1つ、「MEMSミラー・ライダー」というシステムがあります。これは小さな鏡にレーザー光を反射させて周囲の状況をスキャンするもので、メカニカル・ライダーシステムより低コストで実装できるのが特徴です。

LiDARは高レベルの自動運転に有効な技術であることが証明されており、WaymoとCruiseの自動運転タクシーで使用されていますが、両社が採用するメカニカル・ライダーシステムには数千ドル(数十万円)の費用がかかるため、コストを引き下げようとする試みが少なくとも140社を超えるスタートアップにより行われているとのことです。

この記事のタイトルとURLをコピーする

・関連記事 Google発の自動運転車メーカー・Waymoがコスト削減しながらより高性能に仕上がった第6世代「Waymo Driver」を発表 - GIGAZINE

自動運転車の実現で大きな位置を占める「LIDAR」が抱えている問題とは - GIGAZINE

独自AIやLiDARセンサー搭載で軽快な動作が可能なヒューマノイド型ロボット「Unitree G1」が発売される、価格は250万円から - GIGAZINE

死体が埋められた場所をLIDARで検出する技術が登場、殺人事件の捜査への活用が期待される - GIGAZINE

マヤ文明の古代都市遺跡がLiDAR調査で見つかる、きっかけは「Google検索の16ページ目ぐらいで偶然データを発見」したこと - GIGAZINE

・関連コンテンツ

自動運転車やロボットを劇的に進歩させるセンシング技術「LIDAR(ライダー)」��極小チップ化に成功

自動運転車の実現で大きな位置を占める「LIDAR」が抱えている問題とは

自動運転を実現するGoogleの自動運転車の外界認識センサーはこんなにある

自動運転車は滑りやすい雪道を安全に運転できるのか？

5年以内に暗闇でも見えるようになる赤外線メガネが実現するかもしれない

光ファイバーより高速な「WiFiber」の速度は1Gbpsから10Gbps

空も飛ぶことができる陸空両用自動車

自動運転車に不可欠のLIDARシステムを1チップ化しコストの99％を削減できるStrobeをGMが買収

(ロボットや自動運転車が周囲を把握するためのツール「LiDAR」の仕組みとは？ - GIGAZINEから)

[breovietnam]

✨ Regenerate Healthy Hair From the Root With Breo Scalp 3 Scalp Massage Comb ✨ Are you worried about dry, brittle hair, or dandruff? Let the 𝐁𝐫𝐞𝐨 𝐒𝐜𝐚𝐥𝐩 𝟑 scalp massage comb help you regain healthy hair and a clean scalp! 🪞 850nm infrared light technology: Adjusts the oil and water balance on the scalp, nourishes strong hair from the root. 🪞 3 flexible massage modes: Refreshing: Relaxing and refreshing every day. Alert: Brings a feeling of alertness and freshness. Helps sleep: Soothes, helps you sleep deeply. 🪞 IPX7 waterproof: Safe to use in humid environments, easy to clean. Experience Breo Scalp 3 now to feel the difference! A sophisticated product, dedicated to those who love natural, classy hair care.

[f1mike28]

AMG G63 4x4² „Nuthin but a G thang“.

The AMG G63 4x4² brings driving performance to the segment of unadulterated off-road vehicles in unexpected form.

The AMG 4.0-litre V8 biturbo engine generates 430KW (585HP) in this model, and delivers a maximum torque of 850Nm. This is available across a wide rev range between 2.500 and 3.500 rpm, and provides a sense of effortless superiority. It absolves a sprint from zero to 100 km/h in 5 seconds.

The two turbochargers are not positioned on the outside of the cylinder banks, but inside the cylinder „V“. Advantages: a compact engine design, spontaneous response of the turbochargers and low exhaust emissions thanks to optimal airflow to the near-engine catalysts. The eight-cylinder delivers its power with muscular torque in all engine speed ranges, combined with maximum efficiency for low fuel consumption and emission figures.

Two twin scroll turbochargers are used for optimal response.

The housing is divided into two parallel flow channels. Combined with two separate exhaust ducts in the exhaust manifold, this makes it possible to control the exhaust gases on the turbine wheel separately. The exhaust gas from the first and fourth cylinders of the cylinder bank is fed into one duct, that from the second and third cylinders to the other duct.

The aim is to prevent the individual cylinders from having mutually adverse effects on the gas cycle. This reduces the exhaust gas back pressure and improves gas exchange. The results are increased output, more torque at low revs and very fast response times.

Mercedes-AMG One man, one engine Handcrafted by Michael Kübler @f1mike28 in Germany Affalterbach. Driving Performance is our Passion!

Mercedes-AMG the Performance and Sports Car Brand from Mercedes-Benz. Mercedes-AMG Handcrafted by Racers.

[otamarek]

Lamborghini Urus 4.0V8 478kW 650Ps 850Nm 305km/h

[dklasercomponents]

Precision Engineering with 780nm Optical Isolator

The 780nm Optical Isolator minimizes back reflections and improves signal integrity in optical systems. Ideal for sensitive applications, it ensures stable and high-quality performance, meeting the demands of advanced photonics and laser systems. Contact DK Photonics who is a leadig company of these products.

To know more:

[garybrower]

The Best Red Light Therapy: A Comprehensive Guide

Red light therapy (RLT) has gained significant attention in recent years for its potential health benefits, ranging from skin rejuvenation to pain relief. Utilizing specific wavelengths of light, this non-invasive treatment has become a popular option for individuals seeking to improve their overall well-being. In this article, we will explore the best red light therapy options available, their benefits, and how to choose the right one for your needs.

What is Red Light Therapy?

Red light therapy involves exposing the skin to low levels of red or near-infrared light. The primary wavelengths used in RLT typically range from 600 to 900 nanometers. These wavelengths penetrate the skin and stimulate cellular processes, promoting healing, reducing inflammation, and enhancing overall skin health.

Benefits of Red Light Therapy

Skin Rejuvenation: RLT is known for its ability to reduce wrinkles, fine lines, and sun damage. It stimulates collagen production, which can lead to firmer and more youthful-looking skin.

Wound Healing: Studies have shown that red light therapy can accelerate the healing of wounds, cuts, and surgical scars by promoting cell regeneration and reducing inflammation.

Pain Relief: Many users report significant reductions in chronic pain and inflammation, making RLT a promising treatment option for conditions like arthritis, tendonitis, and back pain.

Improved Hair Growth: Some research indicates that red light therapy may help stimulate hair growth in individuals with androgenetic alopecia (male or female pattern baldness).

Enhanced Muscle Recovery: Athletes often use RLT to reduce muscle soreness and improve recovery times after intense workouts.

The Best Red Light Therapy Devices

When it comes to selecting a red light therapy device, several options cater to different needs and preferences. Here are some of the best red light therapy devices currently available:

Joovv Solo 3.0

Type: Full-Body Panel

Wavelengths: 660nm (red) and 850nm (near-infrared)

Features: Modular design for easy setup, customizable treatment times, and a large treatment area. Joovv devices are known for their high-quality construction and effectiveness.

Mito Red Light MitoPRO 300

Type: Full-Body Panel

Wavelengths: 630nm, 660nm, and 850nm

Features: Compact design with a powerful output, offering multiple wavelengths for versatile treatment. It also has a smart control panel for easy operation.

Red Light Man Mini

Type: Handheld Device

Wavelengths: 660nm and 850nm

Features: Portable and easy to use, making it ideal for targeted treatments on smaller areas of the body, such as joints or specific skin concerns.

Sunlighten mPulse Conquer

Type: Infrared Sauna

Wavelengths: 600nm to 950nm

Features: Combines sauna benefits with red light therapy for a holistic treatment experience. It allows for deep tissue penetration while providing relaxation benefits.

LightStim for Wrinkles

Type: Handheld Device

Wavelengths: 600nm to 900nm

Features: Designed specifically for facial rejuvenation, this device uses multiwave technology to stimulate collagen and elastin production effectively.

How to Choose the Right Red Light Therapy Device

When selecting a red light therapy device, consider the following factors:

Treatment Area: Determine whether you need a full-body panel or a handheld device for targeted treatment.

Wavelengths: Look for devices that offer both red and near-infrared wavelengths, as they provide complementary benefits.

Quality and Construction: Invest in a reputable brand known for high-quality manufacturing and effective results.

Portability: If you plan to use RLT on the go, consider a lightweight, portable option.

User Reviews: Research

[robikhan]

Transmits over multimode (OM3 or OM4) at 850nm

qsfp45