Optical Analysis
We are experts in determining all optical characteristics of all types of glass: optical glass, technical glass, special glass, and glass ceramics. We determine the refractive index, dispersion, and transmission using various methods, including precision accuracy, to accommodate large measuring ranges and different sample geometries. We look forward to hearing about your specific requirements and the accompanying challenges.
Typical questions
Typical questions
- Determination of refractive index and dispersion
- Determination of spectral transmission
Methods in detail
Methods in detail
Refractive index and dispersion with precision accuracy (prism method)
Procedures
Calculation of spectral refractive indices from
- Measured values of the refractive angle of the prism
- Measured values of the angles of spectral minimum deviation at the prism
Applications
- Determination of the refractive index for transparent materials, which typically are in a refractive index range of 1.4 ≤ nd ≤ 2.2.
- Accuracy >4*10^-6
Refractive index and dispersion with high accuracy (V-block method)
Procedures
Light from spectral lamps is refracted at media boundaries. The spectral refractive indices are calculated from the angles of spectral light deflection.Applications
- Determination of the refractive index or dispersion of optical glass, colored glass, and glass ceramics.
- The wavelength range is between 365 nm and 1014 nm.
- Accuracy >2*10 ^-5
Refractive index and dispersion using prism coupler refractography with standard accuracy
Procedures
Optical modes are generated in the boundary area between the test specimen and the coupling prism using a laser beam. Their spectral, angle-dependent reflection is measured, and the refractive index is calculated from this.Applications
Determination of the refractive index or dispersion between 1.3 and 2.5 for
- Transparent and colored glasses
- Glass ceramics
- and polymers
in the wavelength range from 400 nm to 1550 nm
- Accuracy: >3*10-4
Determination of spectral transmittance
Procedures
Optical modes are generated in the boundary area between the test specimen and the coupling prism using a laser beam. Their spectral, angle-dependent reflection is measured, and the refractive index is calculated from this.Applications
Determination of the refractive index or dispersion between 1.3 and 2.5 for
- Transparent and colored glasses
- Glass ceramics
- and polymers
in the wavelength range from 400 nm to 1550 nm
List of our methods
Our methods of optical analysis
- Determination and application of optical properties using spectroscopy (UV to IR) for transmission, reflection, and diffuse reflection (remission), in some cases at various sample temperatures up to 700°C (accredited)
- Measurement of fluorescence properties (excitation, emission, quantum yield, and decay time), in some cases at various sample temperatures up to 500°C (accredited)
- Refractive index determination on bulk glass and coatings using prism couplers and ellipsometry for a wavelength range of 400–1600 nm (accredited)
- Performing radiation-induced changes (solarization) and identifying their causes regarding discoloration and scattering (accredited)
- Optical stress analysis of chemically and thermally tempered glass (accredited)
- Determination of the stress-optical coefficient (SOK), measurement of stress birefringence and body stress of glass (accredited)
- Special optical measurement technology according to customer requirements
Highlights
Highlights
Procedure
Our approach
Our experts at SCHOTT Analytics look forward to hearing from you. We will work with you every step of the way, from your initial inquiry to the successful resolution of your issue, no matter how challenging it may be.
Contact us
Let us know your needs using the contact form or call us directly.
Coordination of the inquiry
Our experts will work with you to develop the best solution for your needs.
Quotation
We will prepare a quotation tailored to your needs and provide you with details regarding sample selection and shipping.
Sending your samples
After placing your order, you send the samples and the necessary accompanying documentation to our laboratory.
We measure
We carry out the tests as agreed, competently and promptly.
We report
We create a detailed report of the results.
We discuss and advise
Upon request, we will discuss the results with you in detail and thus become part of your problem-solving process.
Contact
Contact our experts
Whether you want to develop innovative products or ensure compliance with regulations in regulated industries, the expertise of the accredited SCHOTT laboratory ensures your success through measurable excellence.
Dr. Axel Engel
Head of Optical Analysis