Optical Materials
  1. Home
  2. Products & Support
  3. Optical Materials
  4. Lineup
  5. Analysis & Measurement

Analysis & Measurement

With almost 100 years working in the field of optics, Nikon has acquired and developed industry leading metrology capabilities that allow for complete characterization of key optical and material properties. Our key capabilities include internal material characteristics from refractive index homogeneity and birefringence to chemical and physical property evaluation. We also provide high-resolution reflectance/transmittance measurements as well as a variety of other services to meet our customers' unique requirements.
Please contact our sales office for a complete list of measurement services available.

Transmittance

Characteristics

  • Ability to measure a wide range of wavelengths (120 nm to 6000 nm)
  • Double Beam (~ 3300 nm) Spectrophotometer optical system to reduce measurement variations using our proprietary adjustment techniques
  • Nikon's precision cleaning processes eliminate the influence of organic contamination, resulting in high-accuracy transmittance measurements
  • Available measurements include fixed-point absolute measurement, wavelength scanning measurement and mapping measurement

Wavelength reproducibility

±0.025 nm@UV~VIS (190 ~ 900 nm)
±0.1 nm@NIR (900 ~ 6000 nm)

Measurement samples:

Transparent glass, crystal, resin, liquid

Measurement example

Internal transmittance chart

Sample: Calcium fluoride
Thickness: 10 mm

Transmittance map on sample

Sample: Synthetic silica glass
Measurement wavelength: 193 nm

Back to top

Birefringence

Characteristics

  • High-accuracy in-plane distribution of birefringence measurements
  • Ability to determine the direction of the fast axis

Repeatability

≦ 0.1 nm

Measurement samples:

Transparent glass, crystal, resin

Measurement example

Birefringence map (birefringence amount)
Sample: Synthetic silica glass
Measurement wavelength: 193 nm

Birefringence map
(birefringence amount and fast axis direction)
Sample: Synthetic silica glass
Measurement wavelength: 193 nm
  • *Line length: Birefringence amount
  • *Line direction: Fast axis direction
Back to top

Refractive index homogeneity

Characteristics

  • Measurement of large glass material of Φ650 mm using our proprietary technologies is also available
  • Simultaneous front and back surface measurement of refractive index homogeneity and surface shape using the FT-PSI method
  • High-accuracy measurement can be achieved by optimizing the measurement surface of the sample with Nikon's precision polishing process

RMS reproducibility

< 0.1 nm

Measurement samples

Transparent glass, crystal

Measurement example

Homogeneity (3D map)

Homogeneity (Cross-section map)

Sample: Synthetic silica glass
Δn=1.9 ppm(PV)
Φ350 mm example

Back to top

Analysis and Measurement Services

Item Wavelength range, condition, usage, equipment
Refractive index Standard wavelength: C, d, F, g
Wavelength: 185 ~ 1013 nm
Temperature coefficients of refractive index Wavelength: i, g, F, F', e, d, C', C, r
Temperature: -70 ~ 90 °C
Refractive index homogeneity Wavelength: 193 nm, 633 nm
Transmittance Wavelength: 120 ~ 6000 nm
i-line solarization Super-high-pressure mercury lamp
Laser durability ArF excimer laser
Reflectance Wavelength: 240 ~ 2600 nm
Birefringence Crossed Nicols method
Standard measurement (accuracy: 1 nm/cm)
Precise measurement (accuracy: 0.1 nm/cm)
Birefringence distribution (wavelength: 157 nm, 193 nm, 248 nm, 633 nm)
Photoelastic constant Wavelength: 157 nm, 193 nm, 248 nm, 633 nm
Density JOGIS 05
Fluorescence Wavelength: 220 ~ 730 nm
Crystal orientation Calcium fluoride, Quartz, Sapphire, Magnesium fluoride, etc.
Internal quality JOGIS 11, 12, 13
Raman spectroscopy Hydrogen concentration, OH concentration, Fictive temperature
(silica glass evaluation)
Focal length Standard wavelength: C, d, e
Photomicroscopy Light microscope (maximum 50 magnifications)
Thermal properties Linear expansion coefficient (room temperature ~ 1500 °C)
Transformation temperature, Yield point
Thermogravimetric/Differential thermal analysis
(room temperature ~ 1450 °C)
DSC (room temperature ~ 1500 °C)
Mechanical properties Young's modulus, Shear modulus, Poisson's ratio
Knoop hardness, Vickers hardness
Abrasion (JOGIS 10)
Chemical properties Climate resistance, Water resistance, Acid resistance, Alkali resistance
  • *Samples may need to be processed depending on measurements. Please contact us to learn more about prices and lead times.
  • *Please contact us about other measurement conditions and analysis of results.

Please see our brochure for more details