fsdfasdf
fsdfasdf
fsdfasdf
fsdfasdf
fsdfasdf

your-first-name
your-last-name
your-message
receive-ohara
Dave
Corkum
Can someone provide the material properties for various glasses (S-LAL18, S-NBH51, ...) that relate to the depth of a strain field due to a surface stress. I imagine they are the strain tensor coefficients.
Chen
Ma
I read about the SK-1310 fused silica substrate, which show good transmission in NIR range, therefor I want to ask if the product is available in German and which size and shape of the products I could buy? Thank you in advance for your help. Best regards,
Arthur
JEZEQUEL
Dear Sirs, I’m looking for Quartz glasklar (JGS2) 180mm mirrors. Is this something you can provide? If yes, I will send you our requirements to get a quote from you. Best regards, Arthur
Jasmine
Andersen
Hello, I'm a postdoc at the University of Colorado Boulder and got your contacts from a colleague here. I'm urgently in the market for -SCHOTT SF57 -H-ZF52GT -or equivalent glass rods (n=1.86). I am using them to stretch optical pulses at 515-560nm from ~300 fs to a few picoseconds. I need: -65 cm total of glass -preferably in 1" diameter (rectangular glass would be just fine as it doesn't need to be cylindrical) -10-30 cm long segments  -high substrate-surface flatness values to ensure minimal light distortions/scattering from the rod ends -AR coating in the visible is ideal, but if it is much more expensive, no coatings would be just fine.  I would like to know what your company might be able to offer along these lines, if anything, and what pricing and lead times would look like for the options that you have. Thanks for your help! Sincerely, Jasmine Andersen, PhD She/her/hers Research Associate | Optics and Photonics Research Group Electrical, Computer, and Energy Engineering | University of Colorado Boulder
Ron
Hunter
CMC manufactures Head Up Displays. Some of our lenses are currently made from Ohara material S-LAH55V which is apparently no longer available. Our vendor is recommending S-LAH55VS as the replacement. I have reviewed the data sheets that I found online and compared the old to the new, but I am a Mechanical Engineer with no real material experience with optical materials. These two materials look very similar, but I am wondering if Ohara is considering these materials equivalent. If not, generically speaking what effects would changing from the old to the new create? I have to get back to the vendor ASAP so any help in this area would be greatly appreciated. Thank you. Ron Hunter
Laura Pérez-Martín
Laura Pérez-Martín
[Drones2026] Sponsorship Opportunity – Drones 2026 Conference (Barcelona, 11–13 Nov 2026) I hope this message finds you well. My name is Laura Pérez Martín, and I am part of MDPI’s Conference Team. I am writing to invite your organization to become a sponsor of Drones 2026: Mapping the Knowledge, which will take place on 11–13 November 2026 in Barcelona, Spain. https://sciforum.net/event/Drones2026 This conference aims to bring together researchers, industry professionals, and experts from around the world to share the latest advancements, exchange ideas, and foster collaborations in the field of the design, development, and application of drone technologies. Sponsorship offers excellent visibility within a highly specialized academic community, as well as valuable networking opportunities. We would especially welcome the opportunity for your team to join us onsite and showcase your company’s products directly to the many academics and researchers attending the conference. Please find the sponsorship brochure attached. If you would like to explore this opportunity further, feel free to contact us at drones2026@mdpi.com. Thank you very much for your time and consideration. Kind regards, Dr. Laura Pérez-Martín Conference Coordinator MDPI E-Mail: laura.perez@mdpi.com
1
PostilHasty
PostilHasty
Шукав собі новий комплект постільної білизни і натрапив на [url=https://kupiti-postil.com.ua/]kupiti-postil.com.ua[/url]. Взяв собі комплект із сатину – спати дуже комфортно. Ось вирішив поділитися, що там є. Які товари є в наявності: - Бязь, сатинова тканина, перкальна тканина, натуральний льон, щільний поплін, вдосконалений ранфорс - Полуторні, двоспальні комплекти, великі євро та сімеl
1
Nilesh
Wadibhasme
We are a leading solar cell manufacturer in India with a total production capacity of 11 GW. As part of a new R&D initiative, we are currently exploring cerium-doped borosilicate glass specifically designed for space applications. Our focus is on materials/glass that offer enhanced radiation shielding properties, excellent optical stability, and durability under extreme environmental conditions.
1
LanceLer
LanceLer
Отдельной категорией услуг является ремонт однокомнатной квартиры, который в Москве часто выбирают как для личного проживания, ремонт дома цена так и для сдачи в аренду, поэтому здесь ключевыми факторами выступают эргономика и визуальное увеличение пространства, дизайнерский ремонт новостройки а цена такого ремонта под ключ обычно рассчитывается комплексно. Параллельно с городским жильем высок спрос на ремонт домов, стоимость которого складывается из фасадных работ, кровельных систем, инженерной инфраструктуры и внутренней отделки, что требует от подрядчика расширенной лицензии и опыта загородного строительства. дизайнерский ремонт новостройки Чтобы заказать ремонт квартиры в новостройке или на вторичном рынке, ремонт трехкомнатной квартиры стоит довериться специалистам, знакомым с технологиями усадки и особенностями черновой отделки застройщика, ведь в Москве жилье часто сдается с полной или предчистовой подготовкой. Достаточно связаться с компанией, предоставляющей полный цикл услуг: от бесплатного замера до финальной уборки, чтобы гарантировать, что ремонт квартир в Подмосковье или в пределах МКАД будет выполнен с соблюдением единых стандартов качества, а клиент получит готовое жилье, полностью соответствующее его ожиданиям. https://designapartment.ru/dizajnerskij-remont/odnokomnatnoj-kvartiry/ ремонт частного дома москва
1
SIRI KEERTHANA
ATMAKURI
Please quote for the following : Sl. No Item Description Quantity 1. Optical Grade Materials 1 Set Technical Specification Optical Grade Materials, SI. No Component / Material Dimension Refractive Index (with tolerance) dn/dT (Equal to or less than) Abbe number (with tolerance) Homogeneity Grade Quantity Diameter (mm) Thickness (mm) 1. Zns 45 20 2.2523 (+0.0005) @3.9 µm +43x10-6/K NA +2x10-5 Optical grade 5 No’s 2. Zns 25 5 2.2523 (+0.0005) @3.9 µm +43x10-6/K NA +2x10-5 Optical grade 20 No’s 3. Silicon 40 20 3.4258 (+0.0005) @3.9 µm 160x10-6/K NA +2x10-5 Optical grade 10 No’s 4. Silicon 40 10 3.4258 (+0.0005) @3.9 µm 160x10-6/K NA +2x10-5 Optical grade 10 No’s 5. Silicon 30 20 3.4258 (+0.0005) @3.9 µm 160x10-6/K NA +2x10-5 Optical grade 10 No’s 6. Silicon 25 15 3.4258 (+0.0005) @3.9 µm 160x10-6/K NA +2x10-5 Optical grade 10 No’s 7. Silicon 25 5 3.4258 (+0.0005) @3.9 µm 160x10-6/K NA +2x10-5 Optical grade 50 No’s 8. NFK-5 25 5 1.4891 (+0.0005) @546nm -1.4x10-6/K 70.23 (0.5%) +2x10-5 Optical grade 5 No’s 9. NFK-5 35 20 1.4891 (+0.0005) @546nm -1.4x10-6/K 70.23 (0.5%) +2x10-5 Optical grade 5 No’s 10. NFK-5 40 15 1.4891 (+0.0005) @546nm -1.4x10-6/K 70.23 (0.5%) +2x10-5 Optical grade 20 No’s 11. CaF2 Size 40x55 10 1.4285 (+0.0005) @1.06µm -10.6x10-6/K NA +2x10-5 Optical grade 5 No’s 12. CaF2 38 10 1.4285 (+0.0005) @1.06µm -10.6x10-6/K NA +2x10-5 Optical grade 5 No’s 13. CaF2 25 5 1.4285 (+0.0005) @1.06µm -10.6x10-6/K NA +2x10-5 Optical grade 30 No’s 14. SSK-5 40 15 1.6615 (+0.0005) @546nm 2.2 x10-6/K 50.59 (0.5%) +2x10-5 Optical grade 5 No’s 15. SSK-5 25 5 1.6615 (+0.0005) @546nm 2.2 x10-6/K 50.59 (0.5%) +2x10-5 Optical grade 30 No’s 16. NLAF-2 30 20 1,74479 (+0.0005) @546nm -0.1 x10-6/K 44.5 (0.5%) +2x10-5 Optical grade 5 No’s 17. NLAF-2 30 15 1,74479 (+0.0005) @546nm -0.1 x10-6/K 44.5 (0.5%) +2x10-5 Optical grade 5 No’s 18. NLAF-2 40 12 1,74479 (+0.0005) @546nm -0.1 x10-6/K 44.5 (0.5%) +2x10-5 Optical grade 5 No’s 19. NLAF-2 25 5 1,74479 (+0.0005) @546nm -0.1
1
Claudia Rose
Rose
Hi, I hope you are doing well. Ceramics manufacturers serve a wide range of industries, including construction, automotive, aerospace, electronics, healthcare, and energy. Reaching the right companies and decision-makers across these sectors is essential for business growth and strategic partnerships. We support this with a highly targeted B2B database tailored specifically for the ceramics manufacturing ecosystem. Our data coverage includes: • Ceramics manufacturers (advanced, industrial, and traditional) • End-use industries such as Construction, Automotive, Aerospace, Electronics, Healthcare, Energy, Defense, Marine, Oil & gas, Industrial machinery, Consumer goods, Telecommunications, Environmental services & more! Key roles available: Procurement & Sourcing Heads, Supply Chain & Operations Leaders, Plant & Manufacturing Heads, R&D and Product Development Leaders, Business Development & Commercial Heads & other decision makers. This enables you to identify the right partners, strengthen your supply chain, and expand into new markets with relevant contacts. If you can share your target requirements (such as geography, sectors, employee size, or job titles), I will tailor the data accordingly and share a few relevant samples for your review at no cost. Looking forward to your requirements. Best regards, Claudia Rose
1
Donaldvar
Donaldvar
Hey Cricket Fan! The wait is over. Tomorrow, the biggest cricketing spectacle on the planet returns – IPL 2026. Get ready for high-octane sixes, stunning catches, and unforgettable drama. But this time, you’re not just a spectator. Cheer for your favorite team and win alongside them on our platform. Every boundary your team hits, every wicket they take—brings you closer to amazing rewards. It’s simple: the more passion you show, the bigger your victory. What’s waiting for you? Live score updates & insights. Exclusive contests for the real fans. Win prizes as your team dominates the pitch. Log in, pick your side, and let’s make this season yours. The game starts tomorrow. Be there! JOIN THE ACTION NOW
1
WETZEL
Guillaume
Dear Sir, We are urgently looking for optical grade germanium blanks and are wondering if OHARA can supply this type of material of non Chineese origin (our project is being delayed because of export licence from China taking more time than usual). If this is from your capabilities, could you contact me by e-mail for detailed specifications ? Thanks in advance for your feedback and help Best regards Guillaume Wetzel CTO
Amit
Gatir
拝啓 ご挨拶申し上げます。 インドのRCMPAポリッシングテクノロジーズのアミット・ガティールと申します。 近年の日中貿易関係の変化に伴い、日本のガラスメーカーにとって、中国以外の安定した酸化セリウムガラス研磨粉の供給源を確保することがますます重要になっています。多くの日本企業が、長期的な信頼性と依存度低減のために、供給源の多様化に積極的に取り組んでいます。 弊社は以前貴社にご連絡を差し上げたことがあり、この度改めてご連絡を差し上げる絶好の機会だと考えております。RCMPAはここ数年、特に日本市場で求められる高純度・高効率研磨材の生産技術と製品性能を大幅に向上させてきました。 RCMPAについて 酸化セリウムガラス研磨粉の製造メーカー 自動車用ガラス、光学用途、ディスプレイガラス、精密研磨向けの特殊グレードを提供 長年にわたり日本への供給実績あり 中国以外の信頼できるサプライチェーンにより、安定性と一貫性を確保 お客様の技術要件に基づいた研磨特性のカスタマイズが可能 最新の研磨粉グレードをご紹介し、お客様の現在および将来のニーズにどのように対応できるかについてご相談させていただければ幸いです。 この件についてさらに詳しくお話しするため、適切な技術/研究開発/調達担当者をご紹介いただけますでしょうか。 よろしくお願いいたします。ご連絡をお待ちしております。 敬具 アミット・ガティール RCMPA Polishing Technologies Pvt. Ltd. メールアドレス:bdminternational@rcmpa.com 携帯電話番号:+91 9167835927
1
MartaNup
MartaNup
1
Matt
Kyrish
Hello, I am interested in a glass that has low transmission in the visible (about 5% at 450nm, 530nm, and 630nm) and very high transmission in the NIR (as close to 100% as possible at 850nm). From reviewing your catalog, I understand this may need to be a custom material. Would like to chat further.
Ceally
Smith
To whom it may concern, I’m wanting to get in touch with whoever is in charge of hiring? I have submitted my application on indeed for the “Director of People & Culture” position. I would like to follow up on the status of my application, if someone could kindly reach out I would greatly appreciate that. I have also attached my resume and LORs for efficient review. Respectfully - Ceally Smith 816-722-0203 GrowWithCeally.com ———————————— CeallySmith@gmail.com
Oran
Conneely
Hi there, Is the S-TIM22 (NR) radiation resistant and is it still possible to purchase? Kind regards Oran
1
XRumer23viany
XRumer23viany
Completely free Telegram bot for creating gifts, paid access. Super promote your channels! Netxmix offers for you this all-in-one TG bot: First of all Make presents You can make custom present, like special access, information, photos, clips, images, coupons, discount coupons, promo discounts, special codes, and so on, plus custom condition to get the freebie. Specifically, the condition for receiving present will be joining your channels you set at setup + a certain amount of visits to your promo link using the bot. Now you’re able to access the free option for creating gifts; though, to activate it, you need to include some channels among your channel subscription. Please visit our bot t.me/netxmixbot press "start" and tap "Create Free Gift". Secondly Set up paid memberships in TG channels and groups It’s possible to make premium access in your channels and groups using this bot. Payments will be auto-processed and processed crypto. To create a paid membership, just open @netxmixbot https://t.me/netxmixbot click "Start" then profile then your channels – add. With Netxmix you’ll find tons of gifts people have already created, all you can claim completely free. Simply click "Free Gifts" menu in our bot. Join us t.me/netxmixbot No-cost updated billions of GPT, streaming, Google accounts, Gdrive, gaming, gaming, private networks, Discord, Telegram, cloud, etc data in our TG bot. To get DBs please open this link or enter /start in bot, select Free Gifts in bot menu, select type ulp-databases, net-archives, ncloud-archives after that click to database. 262M fresh data from cryptocurrency activity: https://t.me/netxmixbot?start=gift_1 Billions of ULP updated data in finance, news sites, software users: t.me/netxmixbot?start=gift_4 Many other databases inside, just follow @netxmixbot and got updated databases every day: @netxmixbot
1
Carolynrex
Carolynrex
Want the girl you've wanted your whole life? Make her your own and fuck her however you want! Try it right now!
1
zhuobin
wu
Could you please provide us with detailed information and a quotation for this product? We are interested in purchasing it for research purposes.
1
Ceally
Smith
I have submitted my resume and would like to know who I may contact in discussing employment opportunities with the company?
Ruben
Rosales
Hello, Is Evolvoptic/ADVANCED GLASS INDUSTRIES an authorized distributor?
zhuobin
wu
could you give us the product detail and quotation about this product?
1
David
Tomasella
To whom it may concern, I am David Tomasella, sales engineer for dB Electronic Instruments. One of our customer from the National Research Council has opened a tender procedure in which there are some of your products with products from other our suppliers. Is it possible to have a quote for the following item? OHARA SK1300 Window, High Transmission @ 2065nm, 10-5 scratch and dig Quantity: 4 pieces Feel free to contact me for further information. Thanks a lot, Have a nice day, Kind regards
OPTICAL PROPERTIES

2.5 Temperature Coefficient of Refractive Index

Temperature coefficient of refractive index 〔Δn relT

The refractive index of glass changes with temperature. The amount of change in the refractive index due to temperature changes is expressed as the temperature coefficient of the refractive index, and is defined by Δn / ΔT from the curve showing the relationship between the glass temperature and the refractive index. Δn / ΔT changes depending on the measurement wavelength and temperature range, so the Abbe number also changes with temperature.
There are two ways of showing the temperature coefficient of refractive index; one is the relative coefficient, Δnrel/ΔT (10-6 K-1) measured in dry air (101.3 kPa) at same temperature as the glass, and the other is the absolute coefficient ,Δnabs/ΔT (10-6 K-1) measured under vacuum.

The temperature coefficient of refractive index of each glass type is measured as Δnabs/ΔT according to ISO 6760-1 and from this value the Δnrel/ΔT value normally used in optical design is calculated. The relationship between Δn abs/ΔT and Δn rel/ΔT is given by the following formula.

Formula for temperature coefficient of refractive index of glass

n :Refractive index of glass sample (in air, 25 ° C)

OPTICAL PROPERTIES

2.7 Internal Transmittance

Internal transmittance 〔 τi(10 mm)〕

“Internal transmittance” refers to the spectral transmittance of the glass itself, not including reflection losses at the optical glass-air interface; it indicates the transparency of the glass. Most optical glasses absorb a substantial amount of light in the near-ultraviolet region. For some glasses, especially those with a high refractive index, this absorption range also extends into the visible range. This absorption is not only caused by the composition of the glass; it is also affected by impurities in the glass, and varies slightly from melt to melt.

The spectral transmittance (including reflection loss) is measured based on the JOGIS-17 standard at wavelengths from 280 nm to 2400 nm in a pair of glass samples with different distances through which transmitted light passes. Then, the internal transmittance 〔τ<sub>i</sub>(10 mm)〕 at a glass sample thickness of 10 mm is calculated from the measurement data.

OPTICAL PROPERTIES

2.10 CCI (Color Contribution Index)

CCI

CCI (Color Contribution Index) is an index for predicting how much the color of a photograph taken using a certain lens system changes compared to the original color, due to the spectral characteristics of the lens. It is indicated by a set of 3 numbers for blue (B) / green (G) / red (R). Ohara uses this index to predict how much the color will change as a single glass element. For the measurement method, refer to JIS B 7097 “How to express the color characteristics of a photographic lens by the ISO color characteristic index (ISO / CCI)”. The numbers shown are calculated using the sum of the values of the internal transmittance of the glass sample every 10 nm and the average color film weighted spectral sensitivity, described in JIS. For example, B / G / R of 0/3/5, is shown in Fig. 4 in trilinear coordinates.

CCIE
OPTICAL PROPERTIES

2.2 Dispersion and Abbe Number

Dispersion and Abbe Number

Dispersion refers to the phenomenon arising from a variation in the refractive index depending on the wavelength. Here, nF-nC and nF’-nC’are displayed as the main dispersion. The Abbe number is an index of the magnitude of the variance and is also called the inverse dispersion rate. The larger the variance, the smaller the Abbe number.

Abbe Numbers Calcuation

The glass type data sheet indicates the dispersion, calculated from the refractive index to six decimal places . Abbe number is indicated to two decimal places, this is the result of the calculation from nd to six decimal places and the principal dispersion to six decimal places .

Two decimal places: This is the result of calculation from nd to six decimal places (with seven effective digits) and the principal dispersion to six decimal places (with four or more effective digits).

OPTICAL PROPERTIES

2.6 Relational Constant for Temperature Coefficient of the Refractive Index

Relational constant for temperature coefficient of the refractive index

The temperature coefficient of the absolute refractive index of glass for wavelengths not listed in the data sheet can be calculated as a function of wavelength and temperature. Ohara uses the following equation.

Equation for Temperature Coefficient of absolute refractive index of glass
(λ,T0) Refractive index at reference temperature
0 Reference temperature (°C) (Ohara defines this as 25°C)
T: Target temperature (°C)
λ: Vacuum wavelength (μm)
D0D1 D2E0 E1、λTK Constant (listed in the data sheet)

To determine the temperature coefficient of the relative refractive index, refer to the equation given in the previous section, “Temperature coefficient of the refractive index”.

OPTICAL PROPERTIES

2.1 Refractive Index

Refractive Index

When light enters the glass, it slows down inversely proportional to the refractive index compared to in a vacuum or in air. The refractive index of optical glass is usually expressed as the speed ratio of light in the air to themedium (glass sample).

The refractive index is measured by sending a predetermined wavelength of light into the sample and measuring theminimum deviation angle of the emitted light bent by refraction, according to JIS B 7071-1. For the 20 spectral lines shown in the table below, numerical values are shown to five decimal places. The refractive indices (principal refractive indices) for d-line (587.56 nm) and e-line (546.07 nm) are also shown to six decimal places.

Spectral Line Symbol t
Light Source Hg Hg Hg Hg Hg
Wavelength (nm) 2325.42 1970.09 1529.58 1128.64 1013.98
Spectral Line Symbol s A′ r C C′
Light Source Cs K He H Cd
Wavelength (nm) 852.11 768.19 706.52 656.27 643.85
Spectral Line Symbol He-Ne D d e F
Light Source レーザー Na He Hg H
Wavelength (nm) 632.8 589.29 587.56 546.07 486.13
Spectral Line Symbol F′ He-Cd g h i
Light Source Cd レーザー Hg Hg Hg
Wavelength (nm) 479.99 441.57 435.835 404.656 365.015
OPTICAL PROPERTIES

2.4 Disperson Formula Constant

The refractive index for wavelengths not listed in the data sheet can be calculated using the dispersion formula. The Sellmeier equation is used as a practical dispersion formula, as detailed below.

Sellmeier Equation
n : Refractive index to be calculated
λ : Arbitrary wavelength (μm)
A1、A2、A3、B1、B2、B3 Constant (listed in the data sheet)

Using this dispersion formula and the constants for each glass type, the refractive index of any wavelength in the standard measurement wavelength range (365 to 2325 nm) can be calculated with a calculation accuracy of ±5×10<sup>-6</sup>. However, for glass types for which the refractive indices for the entire standard measurement wavelength range are not listed in the data sheet, the applicable wavelength range of the dispersion formula is limited to the refractive index range listed in the data sheet.

OPTICAL PROPERTIES

2.8 Coloring

Coloring

Coloring refers to the degree of coloration of the optical glass and is determined by measuring the spectral transmittance, including reflection losses, for a glass sample with a thickness of 10 mm, according to JOGIS-02. From the spectral transmittance curve (Fig. 3), the wavelengths showing the transmittance of 80% and 5%, respectively, are rounded and displayed in 5 nm units. We use this rounding method: the range 0 nm to 2 nm counts as 0 nm, the range 3 nm to 7 nm counts as 5 nm, the range 8 nm to 10 nm counts as 10 nm . For example, if the wavelength with 80% transmittance is 403 nm and the wavelength with 5% transmittance is 357 nm, the coloring is shown as 405/355.

Optical Glass Coloring

For glass types with a high refractive index, nd ≥ 1.84, the reflection loss is large, so the wavelength showing transmittance of 70 % is used, instead of 80 %, and the value is shown in paranethesis. For example, (415).

OPTICAL PROPERTIES

2.9 Internal Transparency

Internal transparency〔λ0.800.05

As a simplified indicator of coloring, the wavelength values in nm at which
the internal transmittance of a 10 mm thick glass sample is 0.80 and 0.05
are indicated.

OPTICAL PROPERTIES

2.3 Partial dispersion ratio and anomalous dispersion

Partial dispersion ratio 〔θx, y〕 and anomalous dispersion 〔Δθx, y
Anomalous dispersion refers to how far away a glass is from the trend line between the partial dispersion ratio θx, y = (nx-ny) / (nF-nC) for wavelengths x and y and the Abbe number νd. In optical design, glass with anomalous dispersion is required to enable color correction of the secondary spectrum.
Therefore, we have released the θg, Fd diagram and the θC, td diagram as means to show the relationship between θx, y and νd of each glass type. In order to numerically express the anomalous dispersibility, 511605 (NSL 7) and 620363 (PBM 2) are used as reference glasses, and the straight line connecting these two glass types is considered the “normal” line. The difference between the “normal” line and the vertical coordinates θx, y of each glass type is calculated as anomalous dispersion Δθx, y (Fig. 2). In this catalog, the partial dispersion ratio is θg, F and θC, t, and the anomalous dispersion is Δθg, F and ΔθC, t.

Although NSL 7 and PBM 2 are not currently produced by Ohara, the conventional NSL 7 and PBM 2 values ​​(Table 2) are used as the reference values.

Reference Values

θc,t
θC,A'
θg,d
θg,F
θi,g
vd
NSL 7
0.8305
0.3492
1.2391
0.5436
1.2185
60.49
PBM 2
0.7168
0.3198
1.2894
0.5828
1.4214
36.26

g,Fd図とΔθg,F

2.3 Chart