Luminance Measurements of Displays

Microdisplay

Figure 1: Microspectrometers are used to measure the intensity of each pixel

 

 

Microdisplays

Figure 2: Typical test spectra from a display. Intensities can be directly compared between pixels.

 

 

The luminance, intensity or brightness of individual pixels and groups of pixels can be measured and compared using microspectrometers.

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Flat panel displays consist of a series of colored lighted areas arranged in a pattern and can only be readily viewed with magnifying optics.  Due to the high resolution of flat panel displays, they are manufactured with hundreds of rows of microscopic "pixels" on a surface.  Generally, these pixels are red, blue and green though pixels with other colors are also made...for example the latest four color systems also incorporate yellow pixels.

One aspect of display quality control consists of making sure that the brightness or luminance of each pixel does not vary across the entire display.  For example, all the green pixels should have the same brightness no matter where they are positioned in the display. 

Microspectrometers are able to gather relative intensity data from single pixels and from groups of pixels (if you are interested in mura).  Additionally, microspectrometers are also able to map the relative intensity variation within even a single pixel!  This leads to a new level of precision for improved displays.

The way a microspectrometer works is that spectrophotometer entrance aperture is placed over the pixel or pixels in questions.  The black square in Figure 1 is an example.  The spectra is then acquired and will look something like the three spectra in Figure 2.  Using the Lambdafire software, the intensity data is compared with measurements of other pixels to show that the brightness of each sampled area is within the manufacturing parameters.  A high resolution map of the relative intensities can then be generated.

Learn more about luminance measurements of displays below: 

What is a Microspectrometer?

Science of Microspectrometers

Lambdafire™ Analysis Software

 

 

Raman Microspectroscopy

Raman microspectroscopy is a technique that uses a specialized Raman spectrometer to measure the spectra of microscopic samples. In general terms, a Raman spectrometer is integrated with a Raman microscope. Different exciting lasers may be used to excite a microscopic sample at different wavelengths so that the Raman microspectrometer can collect and analyze the vibrational spectra. To learn more about the science of micro Raman spectroscopy, the micro Raman spectrometer instruments or how they are used, please click on the following links:

The Science of Raman Microspectroscopy

Raman Microspectrometer Design

How a Raman Microspectrometer is Used

CRAIC Apollo™ Raman Microspectrometers

 

We invite you to discover our revolutionary technologies that include a range of UV-visible-NIR microspectrophotometers, UV and NIR microscopes, micro Raman spectrometer, NIST Traceable Standards and specialized software. We further invite you to experience our exceptional service and technical support.

 

 

 

 

Minispectrophotometer

Microspectrometer

 


 

Microspectrometer

Emission Spectra Measured with a Minispectrophotometer

 

 

The minispectrophotometer measures the UV-vsibile-NIR spectra of microscopic samples.

The minispectrophotometer is designed to measure UV-visible-NIR spectra of micro samples or micro sized areas of larger objects.  There are two basic types: the fully integrated microspectrometer that has been built and optimized for microspectroscopy and the spectrometer unit designed to attach to an open photoport of an optical microscope.   Depending upon the configuration, both are capable of measuring the spectra of microscopic samples by transmission, absorbance, reflectance, fluorescence, emission and polarization microspectroscopy.   With special software, both are capable of thin film thickness measurements and colorimetry as well.

A CRAIC Technologies™ minispectrophotometer is a purpose-built system that allows you to analyze UV-visible-NIR range microspectra™ non-destructively and with no sample contact.  Capable of analyzing even sub-micron areas, they are also capable of high resolution digital imaging.  Designed for ease-of-use, they are durable instruments designed for miniature scale spectroscopy.

To learn more about minispectrophotometry and minispectrophotometers, select one of the following links: 

What is a Minispectrophotometer?

Science of Minispectrophotometry

Uses of Minispectrophotometers

20/30 PV™ Microspectrometer

 

We invite you to discover our revolutionary technologies that include a range of microspectrometers, microscope spectrometers, UV-visible-NIR microscopes, Raman microspectrometers, Traceable Standards, microspectrometry accessories and software. We further invite you to experience our exceptional service and technical support.

Minispectrometer

Microspectrometer

 


 

Microspectrometer

Emission Spectra Measured with a Microspectrometer

 

 

The minispectrometer measures the UV-vsibile-NIR spectra of microscopic samples.

The Mmnispectrometer is designed to measure UV-visible-NIR spectra of micro-miniature samples or micro-miniature areas of larger objects.  There are two basic types: the fully integrated microspectrometer that has been built and optimized for microspectroscopy and the spectrometer unit designed to attach to an open photoport of an optical microscope.   Depending upon the configuration, both are capable of measuring the spectra of microscopic samples by transmission, absorbance, reflectance, fluorescence, emission and polarization microspectroscopy.   With special software, both are capable of thin film thickness measurements and colorimetry as well.

A CRAIC Technologies™ minispectrometer is a purpose-built system that allows you to analyze UV-visible-NIR range microspectra™ non-destructively and with no sample contact.  Capable of analyzing even sub-micron areas, they are also capable of high resolution digital imaging.  Designed for ease-of-use, they are durable instruments designed for miniature scale spectroscopy.

To learn more about minispectrometry and minispectrometers, select one of the following links: 

What is a Minispectrometer?

Science of Minispectrometry

Uses of Minispectrometers

20/30 PV™ Microspectrometer

 

We invite you to discover our revolutionary technologies that include a range of microspectrometers, microscope spectrometers, UV-visible-NIR microscopes, Raman microspectrometers, Traceable Standards, microspectrometry accessories and software. We further invite you to experience our exceptional service and technical support.

Microspectrometer

Microscope Spectrometer

 


 

Micro spectrometry data

Emission Spectra Measured with a Microscope Spectrometer

 

 

The microspectrometer measures the UV-vsibile-NIR spectra of microscopic samples.

Microspectrometers are designed to measure UV-visible-NIR spectra of microscopic samples or microscopic areas of larger objects.  There are two basic types: the fully integrated microspectrophotometer (as shown) that has been built and optimized for microspectrometry.  There is also the spectrometer unit designed to attach to an open photoport of an optical microscope.   Each has its strengths and depending upon the configuration, both are capable of measuring the spectra of microscopic samples by transmission, absorbance, reflectance, fluorescence, emission and polarization spectrometry.   With special software, both are capable of thin film thickness measurements and colorimetry as well.

A CRAIC Technologies™ microscope spectrometer is a purpose-built system that allows UV-visible-NIR range micro spectrometry both non-destructively and with no sample contact.  Capable of analyzing even sub-micron areas, they are also capable of high resolution digital imaging.  Designed for ease-of-use, they are durable instruments designed for microscale spectroscopy.

To learn more about microscope spectrometers, select a link:

What is a Microspectrometer?

Science of Microspectrometry

Uses of Microspectrometers

20/30 PV™ Microspectrophotometer

CRAIC Apollo™ Raman Microspectrometer

  

 

We invite you to discover our revolutionary technologies that include a range of microscope spectrometers, microspectrometers, UV-visible-NIR microscopes, Raman microspectrometers, Traceable Standards, micro spectrometry accessories and software. We further invite you to experience our exceptional service and technical support.