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Tracie
Sandefur
I am reaching out to inquire about the engineering services your company provides. I would appreciate it if you could share more information regarding your offerings, availability, and pricing. Kindly respond to this inquiry via email at your earliest convenience.
1
Dale
Burow
Hello I have filled out this for a week ago an have not heard back. 1) 76.2mm +/- 0.4mm X 76.2mm +/- 0.4mm X 1.25mm +/- 0.05mm OHARA Quartz (SK-1300) Best possible quality and flatness. 100 to 200. 2) 101.6mm +/- 0.4mm X 101.6mm +/- 0.4mm X 1.25mm +/- 0.05mm OHARA Quartz (SK-1300) Best possible quality and flatness. 100 to 200 3) 126.6mm +/- 0.4mm X 126.6mm +/- 0.4mm X 1.25mm +/- 0.05mm OHARA Quartz (SK-1300) Best possible quality and flatness. 100 to 200 Can you offer these items or a optical house that can provide the goods?
1
Brandonsaf
Brandonsaf
Многие владельцы недвижимости имеют дело с вызовом локализации квалифицированного исполнителя для капитального ремонта. Чтобы получить доступ к проверенным специалистам, следует обращаться к slon5.at, что гарантирует комплексную верификацию компаний. Это — единственный путь защитить инвестиции в безопасности.
1
Jeriscook
Jeriscook
Планируете строительство или ремонт? Мы подготовим точный прайс лист на строительные работы с указанием всех услуг. Расценка на строительные работы формируется на основе объёма задач и используемых материалов. Благодаря прозрачной смете легко рассчитать стоимость строительных работ и спланировать бюджет. Опытная команда выполняет работы качественно и в срок. Свяжитесь с нами, чтобы получить подробный расчёт и консультацию.
1
Katia
Pershin
Hello! I am looking to have custom optical glass panels fabricated and wanted to inquire whether this is feasible. Material: K9 crystal glass or N-BK7 or K7 or any equivalent that is clear and can create prism effect Thickness: approximately 1/4"–3/8" (preferably thicker) Size: 36" × 60" Finish: clear, polished surfaces (front-facing display use) The panel will be mounted in front of a fine art print as a protective and optical display layer. I will likely need multiple panels if the initial prototype works well. Could you please let me know: • Whether a panel of this size is feasible in K9 / BK7 or equivalent or better glass • Approximate pricing for one panel and for small production quantities • Lead time • Any recommendations regarding thickness or fabrication considerations Thank you very much for your time. I appreciate any guidance you can provide. Kind regards, Katia
Jeff
Klem
Katelyn, if you receive this test form submission, please let me know. Thanks, Jeff
1
JemfreVom
JemfreVom
Woke up to descry all the analyse bags shredded on the kitchen floor. The sparse capacity figured finished the youngster lock. How do I gull a cat? https://novabb.ru/ I trouble fortress-level custody
1
Mohsen
Sadeqi
Hi, I am researcher working at NTNU university in Norwary. We require some of your LICGC Ag-01 membrane for our experiments. The ideal size for us is either 25.4 mm SQ x 150 um or 19 mm SQ x 150 um thick. Would you please guide us in term of price and how we can proceed? Regards, Mohsen Sadeqi-Moqadam Researcher at Depatment of Material Science and Engineering at NTNU
1
Dale
Burow
Looking for a source for photo mask grade substrates. 1) 76.2mm +/- 0.4mm X 76.2mm +/- 0.4mm X 1.25mm +/- 0.05mm OHARA Quartz. 2)101.6mm +/- 0.4mm X 101.6mm +/- 0.4mm X 1.25mm +/- 0.05mm OHARA Quartz. 3) 126.6mm +/- 0.4mm X 126.6mm +/- 0.4mm X 1.25mm +/- 0.05mm OHARA Quartz (SK-1300) or other Best possible quality and flatness. One or two hundred for each size.
1
Mojdeh
Nikpour
Hi, Could you send me the quote for three pieces of the SP-01 membrane (25.4 mm SQ x 150 um thick)? Thanks, Mojdeh
Yingxin
Tang
Hi!This is Yingxin Tang from Rice University, our lab is interested in the Lithium-Ion Conducting Glass-Ceramics (LICGC™) powder, could you please provide me with a quote of this product? Maybe we want to purchase 50-100g of it. And I will use the credit card from our university to place the order, please make sure the quote is tax-exempt. Thank you!
1
Dilruba
Popy
Product: Glass Wafer Carriers, Double Sided Precision Polished Substrates. Hi, We need flat clear glass substrates for wafer polishing. Substrate diameter should be 3 inches and thickness is 4 mm. Can you please send me quote for 1piece and 20 pieces? If you have different types, like quartz, pyrex, optical glasses, please send quotes for all types. Thanks Regards, D. Popy
Mojdeh
Nikpour
Hi, Our team has ordered membranes from you previously, and I have a few follow-up questions regarding your current options: 1. Is the AG-01 model still in production? If so, could you provide its standard dimensions? 2. What is the pricing for custom sizes and thicknesses? For example, what would be the cost for an SP-01 at 23.0 mm DIA x 180 μm thick? 3. Which of your membranes offers the best performance for water impermeability? Thank you for your help! Best, Mojdeh
Madelaine
Dolich
I would like to get a description of membrane sizes of the SP01 membranes offered, and price options.
ANTONIO
BISCEGLIA
I'm interested to buy a mirror for telescope Ritchey Chretien diameter 800 mm F6
1
Ashwani
Kaul
Radiation Hardened Glass Wafer , Equivalent to BK718 Daimeter : 100mm +/- 1mm Both side Polished wavelength Range : 400 - 850 nm Surface Quality : 40- 20 (Scratch and Dig)
Jessica Snyder
Jessica Snyder
Hi there, I'm Jessica, your Account Success Manager on the account. I've created a personalized welcome page for your business that outlines how our secondary customer financing program helps contractors approve more home improvement projects - with absolutely no per-loan fees, extra work, or risk to your business. Here are 5 reasons contractors choose this program: 1- No merchant financing fees - avoid the 5-15% charged by traditional programs 2- FICO approvals as low as 500 - a backup option for homeowners who don't qualify through primary lenders 3- No switching required - works alongside your current financing options 4- No added work for your team - no training or process changes 5- Zero risk to your business - no recourse, no liability Feel free to view your business's custom financing welcome page here: Ohara corporation Custom Welcome Page hrdealerfinancing.com/?a=Ohara-corporation Happy to walk you through it once you’ve had a chance to review. Best, Jessica Snyder  HelloRates Customer Financing  Partner Success Team  Trusted by 13,000+ Contractors for Their Prime & Subprime Customers 12
1
Jeffrey
Kowalski
Hello, For your lithium ion conducting ceramics, what is the area and thickness that you are able to produce (interest in thin with a larger area)? Also, do you sell sodium ion conducting ceramics as well? Thank you for any information you can provide. Jeff Kowalski
1
Margherita
Murrone
To whom it may concern. Warm Greetings! We are requiring your services for a Custom SK-1310 Model, Fused Silica, you can review the attached spec details already provided. I kindly ask that you confirm this email by stating what the procedures are for working with us. I appreciate your time and look forward to hearing from you.
1
Nikita
Lipov
Dear Sir or Madam, My name is Nikita Lipov and I represent Pythagoras International Supply Co., Ltd. We are currently sourcing ultra-low thermal expansion glass substrates for precision optical mirrors used in a temperature-stabilized optical system. Due to procurement constraints in this project, Corning ULE glass cannot be used, therefore we are evaluating alternative materials with equivalent thermo-mechanical performance. We would like to ask whether your materials could meet the following specifications. Mirror substrate material requirements: Material type Ultra-low thermal expansion glass Thermal expansion requirements • Zero crossing temperature of the coefficient of thermal expansion (CTE): within 5°C – 35°C (required) • Average CTE in the range 5°C – 35°C: from −31 × 10⁻⁹ (1/°C) to +31 × 10⁻⁹ (1/°C) Material quality requirements • Maximum inclusion diameter: ≤ 3 mm • Average inclusion density: ≤ 0.015 per cm³ • Inhomogeneity (variation) of CTE: ≤ 11 × 10⁻⁹ (1/°C) We would appreciate your technical clarification on the following points: 1. Do you manufacture materials that can meet the above CTE and homogeneity requirements within the specified temperature range? 2. If so, which material grade (for example Zerodur, ClearCeram or other variants) would be recommended for this application? 3. If finished mirror substrates are not supplied directly, could you recommend qualified optical manufacturers capable of producing custom mirrors from your material? These mirrors will be used in a high-stability optical system where thermal expansion stability and material homogeneity are critical parameters. If possible, we would also appreciate receiving relevant technical documentation or material datasheets. Thank you in advance for your assistance. Best regards, Nikita Lipov Pythagoras International Supply Co., Ltd.
Michele
Signer
Can you please provide me the MSDS of S-BAM21. Thank you
udaykumar
R
​​Dear Sir We are looking for 3 pieces, 220 mm in diameter and 20 mm thick meeting below specifications. Max temperature: Ambient temp. Max pressure: 1 bar. Media: Air. MOC of glass: Fussed Silica. Application: Laser transmission. (500mJ energy) ​Kindly send me your best offer with the data sheet at your earliest convenience.
1
Venus
Phelan
Hi I have tried DMing you on Instagram but haven't received a response. I would be grateful if you could put me in touch with the right person who handles marketing/influencers at oharacorp.com I have some influencers interested in promoting oharacorp.com on a gifted basis. Please could you also copy in our influencer relationship manager, Steven at info@mayfairpug.online Many thanks Venus Phelan mayfairpug.online
1
Steven
Woelfle
Please remove my name from your mailing list. Thank you.
Benniemor
Benniemor
1
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