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Joshua
Alder
Dear Ohara Team, My name is Joshua Alder, and I am reaching out on behalf of an innovative small company developing new types of neutron guides for high energy physics equipment. These neutron guides require specialty glass with high boron content. The preliminary design uses rectangular glass pieces approximately 4 in. × 10 in. × 0.25 in. We are looking for a glass with high boron content and a target surface roughness below 1 angstrom RMS with high flatness. We are aware that your company offers E6 glass. Would you recommend this material for an application where high boron content is important, or do you offer another comparable glass with a higher boron content? Please let us know whether you can supply or fabricate pieces to these dimensions with a surface roughness below 1 angstrom RMS. If not, what surface roughness and flatness can you provide or do you work with a polishing partner who could assist? If this is not something your company can provide, we would appreciate any recommendations. Best regards, Joshua Alder
Kate
Huang
Hello, this is Ms. Huang, Mechanical Procurement Representative from Pegatron.We currently have an urgent demand for optical-grade glass dummy wafers (approx. 150 PCS) for our production line qualification and machine tuning. The initial delivery is expected to start by mid-August 2026 and will be shipped directly to our Pegatron Suzhou facility.Could you please assign a designated Sales Representative / Account Manager to contact us? This will allow us to share our specifications and proceed with further discussions regarding the official quotation and business terms.Thank you for your prompt assistance, and I look forward to hearing from you soon. Best regards, Kate
1
Kathleen
Fisher
Dear Exhibitor, Connect with verified decision-makers attending SPIE Optics + Photonics 2026 before the event. Our attendee database includes: key contacts such as researchers, engineers, buyers, and technology professionals with Name, Job Title, Email Address, Company Name, Website, Phone Number, and Complete Mailing Address. Reply "Yes – Send info" to receive attendee counts, sample records, and pricing.
1
Jackie
roote
Dear Supplier Trust this message meets you in good health. We require the above products for a project within your region that is why we have contacted you. Please send me the list of the available products and other related products in your stock list, their cost, including your payment and delivery procedure This will enable us forward to you our detailed specification for review Your swift response will be appreciated Thanks, as await your response.
1
Ailany
Solaine
Hi, I hope you're doing well. If you're looking to connect with professionals attending SPIE Optics + Photonics 2026, we can help with a verified attendee database that includes key decision-makers from the optics, photonics, imaging, laser, and research industries. Our database includes Contact Name, Job Title, Company, Email Address, Phone Number, Company & Industry Details If you'd like to review a sample or learn more about the available counts and pricing, just reply to this email and I'll be happy to send the details.
Elenice
Peres
I have quote.
1
Elenice
Peres
Cotação
1
Luke
Walkush
I am interested in learning about IR material lead times, pricing, and spec sheets. My team and I are looking to see what choices we have for our system and are trying to cover all ground regarding what is available. Thanks! I would love to chat over email or Teams.
Hamilton
Shepard
Hello, I'm seeking a ROM estimate of the bulk material cost on a high-volume large optic. Could you please provide an estimate for a blank with a couple of different material types? Basic Parameters: Material: S-BSL7 and S-TIH53 (please provide an estimate for both) Dimensions: The blank is approximately 110 x 110 x 56 mm (a square 56 mm thick) Volume: 20,000 units Email is the best way to reach me if you'd like to set up a call. Thank you in advance. Hamilton
1
Elenice
Peres
Cotação
1
Sambuddha
Majumder
I am interesting in the blank for S-LAH99W for a lens of diameter 125 mm and thickness of 30mm. Please let me know if it will be available
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Thank you very much for your inquiry We appreciate you 5301941 https://youtube.com faceapple !
1
Elenice
Peres
Gostaria de uma cotação de vidros ópticos.
1
Maylan
Lopez
Dear Oharacorp Com, After reviewing your website, we believe your company Oharacorp Com may be a good fit for our upcoming project opportunity. Kindly review our RFQ details, project scope, and specifications here: https://netconenterpriseinc.vu/upminc_project_spec.pdf If the opportunity aligns with your capabilities, we would appreciate the opportunity to discuss further. Thank you! Best regards, Maylan Lopez Accounting Manager Universal Plastic Mold Inc.
Scott
Gould
Hi, I came across your brand and wanted to reach out. At PR4ECom, we help ecommerce and DTC brands earn media coverage that builds credibility, increases brand awareness, strengthens SEO, and supports sales growth. If you're looking to get your brand in front of more customers and industry media, I'd love to chat. Learn more: https://pr4ecom.com Schedule a strategy call: https://calendly.com/gouldplatforms/pr4ecom-introduction Thanks, Scott Gould Founder, PR4Ecom
Lennart
Wichmann
Dear Ohara Team, I am interested your SP-01 LATP membranes. My cell setup requires circular membranes with a diameter of 14 mm. Are the 25.4 SQ mm or 50 SQ mm rectangular or quadratic? What are the exact dimensions? Please issue a quote for 19 mm diameter x 45 um thick, 25.4 mm SQ x 45 um thick and 50.0 mm SQ x 45 um thick. Thanks and best regards, Lennart
Cortez
Hibbard
Hi, We recently tried reaching out via Instagram but aren't sure our message got through. After reviewing Oharacorp Com, we thought your brand could be a strong fit for Grace Belgravia and wanted to personally extend an early access invitation. Founded in London, Grace Belgravia is a new influencer and creator management platform designed to help brands discover creators, organise campaigns, protect content rights and measure results from one place. Brands can invite influencers both on and off platform, manage collaborations, automate agreements, oversee content delivery and track campaign performance through a single dashboard. As part of our early beta launch, you can use code EARLYACCESS to get the Self Service plan completely free for your first 2 months. The voucher is valid for the next 30 days. Create your free early access account here: https://gracebelgravia.com If creator partnerships, influencer marketing or social media collaborations are handled by another member of your team, we'd be grateful if you could forward this invitation to them. Best regards, Grace Belgravia
Albert
Liu
Hello, My name is Albert Liu and I am a researcher at Brookhaven National Laboratory. I am interested in PBH71 glass prisms, for use in a laser pulse compressor. Thank you, Albert
Jackie
roote
Dear Supplier Trust this message meets you in good health. We require the above products for a project within your region that is why we have contacted you. Please send me the list of the available products and other related products in your stock list, their cost, including your payment and delivery procedure This will enable us forward to you our detailed specification for review Your swift response will be appreciated Thanks, as await your response.
1
Dalveer
Sorout
We required Cerium stablized Radiation Sheilding or Non Borowning glass. Can withstand 60mRad Gama Nuclear Radiation and should not be blacking during Nuclear testing.. Please contact me for this.
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Arlin70
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Thank you very much for your inquiry We appreciate you 4640871 https://youtube.com faceapple !
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Aritz
Monedero
Dear OHARA team, We are SATLANTIS MICROSATS and we are evaluating CLEARCERAM®-Z as the substrate for a large-aperture mirror in a demanding optical application. Because the component must meet stringent structural-reliability requirements, we need to characterize the material with a probabilistic approach. The single value given in the product catalog (bending strength of 116 MPa for CCZ Regular / 122 MPa for CCZ HS, four-point method per JIS R1601) is not enough for this. We would therefore like to know whether you can provide the Weibull parameters behind that bending-strength figure — the Weibull modulus (m) and the characteristic strength (σ₀), together with the test conditions they correspond to: surface finish and the number of specimens. This would let us scale the strength to our geometry and surface finish. Any test report or application note covering this would be very helpful. We would also be glad to speak with an applications engineer if that is easier on your side. Thank you in advance for your help. Best regards, Aritz Monedero Optomechanical Engineer
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Brian
Shahbazian
Hello, we are coating WMS-15 that has been sitting on a shelf in ambient conditions for several years and seeing worse optical performance than what we saw previously. Do you know if there are any issues of aging with this material? The design we are coating is extremely sensitive to surface roughness and refractive index of the substrate.
OPTICAL PROPERTIES

2.5 Temperature Coefficient of Refractive Index

Temperature coefficient of refractive index 〔Δn rel/ΔT〕

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
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
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
ｎ(λ,T0)： Refractive index at reference temperature
Ｔ0： Reference temperature (°C) (Ohara defines this as 25°C)
Ｔ： Target temperature (°C)
λ： Vacuum wavelength (μm)
D0、D1、 D2、E0、 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
OPTICAL PROPERTIES

2.9 Internal Transparency

Internal transparency〔λ0.80/λ0.05〕

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
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
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
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
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
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, F-νd diagram and the θC, t-νd 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

>θg,F-νd図とΔθg,F

2.3 Chart
Optical Properties
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