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Laser Frequency Doubling
Laser frequency doubling describes the laser whose wavelength is lowered by fifty percent, and also the frequency is doubled by the frequency doubling crystal (LBO, BBO). After the crystal doubles the frequency of 1064nm solid light, it becomes 532 green light. Doubling condition The problem for frequency doubling is that the crystal can discover a direction to make sure that the fundamental frequency laser with frequency f1 and the frequency doubled light with frequency 2 * f1 can have the same refractive index (photon momentum conservation), to make sure that optimal gain feature can exist in the crystal size. The laser can continually convert the power from the f1 basic frequency to the 2 * f1 frequency doubled light. The principle of optical frequency doubling The principle basis for the frequency doubling of light is the nonlinear result of laser light. The laser light is so extreme that it triggers the atomic polarization of the crystalline material, that is, the separation of favorable and unfavorable charge facilities. This separation is a dynamic resonance, as well as the vibration frequency, is consistent with the frequency of the laser. The vibration amplitude is related to the intensity of the laser area. Due to the fact that the laser magnetic field strength and also polarization strength is nonlinear, for second-order nonlinearity, the polarization intensity is proportional to the square of the laser's electric area intensity E. The intensity of the fundamental frequency optical area changes, which can be seen from the trigonometric function, cosa * cosa= 0.5 *( cos2a +1). The second-order nonlinearity will produce double-frequency polarized vibration as well as zero-frequency polarized prejudice. This frequency-doubled polarization (resonance of the range between favorable and also adverse costs) will certainly create frequency-doubled light or contribute in gaining the passing frequency-doubled laser light. Frequency-doubled light problem. This makeover or enhancement of doubled-frequency light requires to fulfill two problems: (1) The basic frequency light leads the doubled frequency light by 0.75 π; (2) The phase difference area stays unmodified in the crystal activity area. The phase distinction area remains the very same, needing the product to have the very same refractive index for both frequencies. Usually, the refractive index of products boosts with light frequency. BBO crystals such as this can meet the exact same refractive index in certain instructions. The regular refractive index guarantees that the spatial coupling area with a specific size in certain instructions in the crystal is fixed and the waveform difference is steady. There is a specific deviation in practice, so the combining size is limited, which is the particular size of the laser crystal. https://www.laser-crylink.com/laser-products/nonlinear-crystal/bbo-crystal/ Classification of frequency-doubling crystals. Ammonium dihydrogen phosphate (ADP), potassium dihydrogen phosphate (KDP), potassium dihydrogen phosphate (DKDP), dihydrogen arsenate crucible (DCDA), and also various other crystals. They are a representative variety of crystals that produce dual-frequency and other nonlinear optical impacts, appropriate for use in the near-ultraviolet-visible as well as near-infrared areas, and have a big damage limit. Lithium niobate (LN), salt barium niobate, potassium niobate, α-type lithium iodate, and also various other crystals. The additional nonlinear electric polarization coefficient is huge, and the refractive index of crystals such as LN as well as BNN is sensitive to temperature, which varie from the temperature level adjustment features of the diffusion impact. People can readjust the temperature level suitably to accomplish non-critical matching. Appropriate for the noticeable light area as well as the mid-infrared area (0.4 μ-5μ). LN is prone to refractive index change and photodamage under light; the damage limit of BNN is more than that of LN, but the strong remedy area is larger, as well as the structure is easy to transform, causing inadequate optical uniformity, and also big crystals with excellent efficiency are tough to get; potassium niobate has no strong service In the melting zone, it is feasible to obtain big crystals with consistent optical residential or commercial properties; α lithium iodate is a liquid service growth crystal, which can expand big crystals with excellent optical quality, as well as the damages threshold is more than that of BNN crystals. The downside is that it has no non-critical matching capacity. Semiconductor crystals. Semiconductor crystals consist of gallium arsenide, gallium arsenide, zinc sulfide, cadmium zinc oxide, selenium, etc. Their square nonlinear electric polarization coefficients are more than those of the first 2 crystals and also appropriate for bigger infrared bands Nevertheless, except for selenium and tellurium, the majority of crystals have no dual refraction result and can not attain setting matching. Borate, barium metaborate (β-BaB2O4), lithium triborate (LiB3O5), and so on. Amongst them, Researchers efficiently created barium metaborate and also lithium triborate crystals for the first time in the 1980s. As well as had the superior benefits of big nonlinear optical coefficients as well as high laser damages limit. It is an exceptional crystal material for laser frequency conversion, which has actually created terrific consequences worldwide. Ideal for ultraviolet wavelengths, consisting of KBF, etc, even for deep ultraviolet wavelengths. The basic requirements for the amount frequency, distinction frequency, and also optical parameter oscillation effects of nonlinear optical crystals are the same as those of dual-frequency crystals.
무료 웹 데이터 스크래핑 도구 ScrapeStorm Google Sheet로 크롤링 데이터 자동 내보내기
오늘은 ScrapeStorm이라는 무료 지능형 웹 데이터 스크래핑 소프트웨어를 사용하여 웹 스크래핑 데이터를 Google Sheet으로 자동으로 내보내는 방법을 소개하겠습니다. Google Sheet는 언제 어디서나 공유될 수 있고 무료로 편집할 수 있는 온라인 표입니다. Google Sheet은 컴퓨팅 기능이 풍부하여 여러 사람이 동시에 협업하여 스프레드시트를 작성할 수 있습니다. ScrapeStorm은 무료 지능형 웹 데이터 크롤링 소프트웨어로 ScrapeStorm에서 수집된 데이터를 Google Sheet으로 자동으로 내보낼 수 있습니다. 수집 결과를 공식적으로 내보내기 전에 웹 주소를 입력하고 스크래핑 태스크를 설절하고 스크래핑해야 합니다. 이 단계는 이전 글에서 이미 상세한 조작법을 소개했으니 →(웹 스크래핑 도구 ScrapeStorm으로 상품 정보을 수집하는 방법), 여기서 더 이상 군더더기는 하지 않겠습니다. 다음은 주로 스크래핑 데이터 추출과 관련된 작업에 대해 설명하겠습니다. 1. 자동 추출 설정 스크래핑 시작할 때 바로 자동 내보내기 기능을 사용하도록 설정할 수 있습니다. 편집 인터페이스에서 스크래핑 시작 버튼을 클릭하고 팝업 알림 상자에서 자동 추출 버튼을 클릭하여 자동 내보내기 설정 인터페이스로 전환할 수 있습니다. 자동 추출 기능을 선택하고 자동 추출 만들기 버튼을 클릭하여 자동 내보내기 설정을 새로 만듭니다. 추출 만들기 버튼을 클릭하면 소프트웨어가 자동 내보내기 설정 인터페이스를 엽니다. 2. 추출 내용 설정 설정 인터페이스에서 오른쪽 프롬프트에서 Google Sheet을 찾습니다. 알림: Google Sheet을 클릭하면 Google 계정에 로그인할 페이지가 자동으로 팝업되며, 로그인이 완료되면 소프트웨어로 돌아갑니다. 설정 페이지에서 필요에 따라 내보내기 파일의 이름을 변경하고 내보내기 데이터의 수집 범위를 설정할 수 있습니다. 3. 데이터 추출 및 파일 보기 추출 내용 설정이 완료된면 자동 내보내기 자동화 버튼을 클릭합니다. 데이터 추출이 완료되면 Google Sheet에 로그인하여 내보낸 파일을 볼 수 있습니다. ScrapeStorm은 다양한 형식의 데이터 내보내기 방식을 지원하며 Google Sheet으로 내보낼 수 있을 뿐만 아니라 TXT, EXCEL, CSV 및 HTML의 파일 형식을 지원하고 데이터베이스(MySQL, MongoDB, SQL Server, PostgreSQL)에 직접 게시할 수도 있습니다. 혹시나 관련 수요가 있으시다면 본편 공유 튜토리얼을 따라 해보세요~
Jasa cargo Jakarta ke Pulau Gorom (0816267079)
Jasa cargo Jakarta ke Pulau Gorom Logistik Express merupakan perusahaan yang bergerak dibidang pengiriman barang dengan tujuan dari dan ke seluruh wilayah Indonesia. Logistik Express memiliki keunggulan pada tarif yang terjangkau serta pengiriman aman sampai alamat tujuan. Di era sekarang ini banyak dibutuhkan jasa pengiriman yang praktis dan dan efisien. Untuk itu Logistik Express hadir sebagai mitra pengiriman barang anda mulai dari paket kecil 30kg, 50kg, dan 100kg sampai hitungan tonase. Melayani pengiriman retail, LCL (Less Container Load), FCL (Full Container Load), dan sewa armada. KEUNGGULAN LAYANAN LOGISTIK EXPRESS Konsultasi online mudah via whatsapp Bisa request picked up kiriman Door to Door Service Pembayaran mudah via cash atau transfer Tarif terjangkau MACAM MACAM ARMADA PENGIRIMAN 1. Via Udara Jasa Cargo via udara banyak dipilih oleh para pengirim barang maupun penyedia jasa ekspedisi karena leadtime pengirimannya yang cepat dan efisien. Namun pengiriman via udara ini juga memiliki ongkir yang lebih mahal daripada pengiriman dengan armada via darat dan via laut. 2. Via Laut Cargo via laut ini kerap menjadi pilihan armada pengiriman barang karena jangkauannya yang luas. Armada cargo via laut ini dapat menjangkau pengiriman antar provinsi dan juga antar pulau. Jika anda menginginkan pengiriman yang aman namun tetap dengan ongkir terjangkau maka cargo via laut ini menjadi pilihan yang tepat untuk anda. 3. Via Darat Cargo via darat dengan armada kereta maupun truk cargo juga banyak dipilih oleh masyarakat yang ingin mengirimkan barang. selain ongkir yang terjangkau, cargo darat ini memudahkan para pengirim untuk melacak posisi barangnya. PEMESANAN LAYANAN CARGO LOGISTIK EXPRESS Hubungi Kami Untuk Konsultasi Dan Juga Layanan Kiriman Cargo Customer Service Yuni : 0816 2670 79 Email : yuni.logistikexpress.id@gmail.com Ekspedisi Jakarta Pulau Gorom, Seram Bagian Timur Ekspedisi Semarang Pulau Gorom, Seram Bagian Timur Ekspedisi Surabaya Pulau Gorom, Seram Bagian Timur Ekspedisi Bandung Pulau Gorom, Seram Bagian Timur Ekspedisi Tangerang Pulau Gorom, Seram Bagian Timur
Jasa Cargo Jakarta Saparua (0816267079)
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Tellurium dioxide
Tellurium dioxide (TeO2) is the strong oxide of tellurium. It happens in two various types, the yellow plagiotic mineral β-TeO2 tellurite and the synthetic colorless tetragonal (paraturite) α-TeO2. A lot of the info concerning reaction chemistry has actually been obtained in researches entailing pariturite, α-TeO2. The natural mineral of tellurium dioxide is "flavuride". Chemical formula TeO2. Molecular weight 159.60. Colorless crystal, melting point 732.6 ℃. Dicrystalline form: Tetragonal form derived from nitric acid remedy, looking like an octahedral type. Relative thickness 5.67( 15 ℃). After home heating, it turns yellow, melts into dark yellow fluid, as well as cools to acicular crystal (ordnance system) with a loved one density of 5.91( 0 ℃). Insoluble in water. Adducts as well as salts are conveniently liquified in focused strong acids; It is additionally conveniently soluble in caustic alkali solution to develop tellurite. Insoluble in ammonia. Tellurium is produced by combustion in oxygen or by response of tellurium with cold concentrated nitric acid and evaporation of the response remedy. Prep work technique: Response of essential tellurium powder with nitric acid, heating to full response of tellurium powder to quit launching nitrogen oxide, evaporative air conditioning crystallization to get alkali tellurium Te2O3( OH) NO3, as well as home heating decay of this item at 400 ~ 430 ℃. Application Tellurium dioxide powder is made use of to expand TeO2 single crystal or make acoustooptic materials. It is a conditional glass forming agent and also can be utilized as an additive in semiconductor components, conductive pastes as well as electroplating options. Commonly made use of in acoustooptic deflectors, acoustooptic modulators, acoustooptic harmonics, acoustooptic filters, tunable filters and also various other type of acoustooptic gadgets. Under the exact same aperture, the resolution can be improved by orders of magnitude. At the same time, the acousto-optic gadgets constructed from tellurium oxide have the advantages of fast feedback rate, tiny driving power, high diffraction efficiency, steady as well as trusted efficiency. Features of TeO2 crystal: ⚫High refractive index; ⚫Low noise attenuation; ⚫High quality element; ⚫Exceptional acoustic and also optical buildings; ⚫Big sound and light top quality aspect; ⚫High openness to visible light.