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Optical
Metrology
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Measure %Transmission,
Optical Density (OD), Absorbance, and Reflectance of films,
filters, coatings, fibers, lenses and just about any optical
element
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Optical Metrology
Systems include a mini spectrometer, light source, and a metrology
accessory such as a reflectance probe or transmission fixture
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Systems available
for 190-2300nm wavelength range
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Resolutions
better than 1nm with high stability research grade optical performance
and repeatability
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Spectrometers
for Color Measurement
The most commonly used instrument for the measurement of
the optical performance of filters, films, and optical components
is a spectrometer. Easily measure %Transmission, Optical
Density (OD), Absorbance, and Reflectance of just about
any optical element for purposes of R&D, quality control,
production, or simply to better understand your system.
Using
a StellarNet fiber optic spectrometer coupled to a reflectance
probe and fiber optic light source, it is possible to measure
film thickness by detecting the sinusoidal fringe pattern
from the samples specular reflectance. Choose between various
StellarNet spectrometers to suite your Thin Film and/or
optical measurement requirement. StellarNet offers model
spectrometers that range from 190-2300nm. Dual channel configurations,
extended range detectors, or high resolution optics can
be employed to suite your optical measurement. See the StellarNet
Thin Film Companion Software Page to learn more about film
thickness measurements.
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![](colormeasure.jpg)
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A fiber
optic sample probe is powered with a fiber optic light source
SL1 tungsten krypton bulb (see other options below).
For measuring the color of solid samples, an integrating
sphere, such as the IC2, is used in place of the fiber optic
reflectance probe to improve measurement consistency. The
IC2 also acts as a cosine receptor to improve irradiance
measurements. A white reflectance standard, such as the
RS50 also listed below, is required to generate a reference
for subsequent measurement of solid samples. For more information
on color applications, refer to the section entitled
Color Measurement Systems.
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Transmission
Sample Spectra |
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![](ND-Filter-Transmission.jpg) |
![](NIR-spectrometer-Lens-filter-measurment1.jpg) |
Transmission Measurements of Neutral Density Filters. With a StellarNet
optical metrology system you will never have to guess again.
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Lens, filters, films, coatings, and plastics sometimes will have interesting
characteristic fringe patterns in the far NIR. Be sure to test your
samples!
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![](InGaAsThinFilm.jpg) |
![](Transmission-spectra-of-Sun-glasses.jpg) |
RED-Wave-NIR-InGaAs silver film for reference surface
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Transmission spectra of various sun glass brands for color and UV
blocking optical properties
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