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This section provides an overview for spectrophotometers as well as their applications and principles. Also, please take a look at the list of 0 spectrophotometer manufacturers and their company rankings.
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Department of Chemistry, Graduate School of Science, Tohoku University (Master of Science)
As a display engineer, engaged in Seiko Epson Corporation, Sony Corporation, Japan Display Corporation, etc.
https://researchmap.jp/tanakachihiro
https://www.linkedin.com/in/chihiro-tanaka/
A spectrophotometer is a device that quantifies color. The human eye can also judge color, but it cannot make accurate judgments because it is a qualitative evaluation and because colors are seen differently by different people.
On the other hand, the color of a product is often one of the quality evaluation items. Therefore, spectrophotometers numerically evaluate color by quantifying brightness and the intensity of each color, such as red, blue, and green.
In addition, since the way colors appear changes depending on the way light hits an object, the distance from the light source and its intensity are also recorded when measuring with a spectrophotometer.
As the word "spectrophotometer" implies, it measures the intensity of different wavelengths of light. The device receives light that hits the surface of a sample from an external light source, such as sunlight or illumination, and outputs a result showing how the intensity and color of each wavelength appears. There are three types of spectrophotometers: 0°/45° spectrophotometers, integrating sphere spectrophotometers, and multi-angle spectrophotometers.
The 0°/45° spectrophotometer is the most common method of evaluating color when viewed from a single angle. This method is used for samples with smooth surfaces. The integrating sphere spectrophotometer collects and measures light diffused across the surface of a sample and is useful for samples with uneven surfaces or those that contain gloss. Multi-angle colorimeter is a method to evaluate color from various angles, and is used to evaluate products whose colors change depending on the angle from which they are viewed.
Spectrophotometers can also be used to calculate the conditions under which colors appear the same even under different light source conditions, making them suitable for evaluating how colors appear under various conditions.
Colorimeters, or colorimeters, are used for a variety of purposes, but here we will discuss two typical types of colorimeters: colorimeters (color difference meters) and spectrophotometers.
The L*a*b* color space (official name: CIE 1976 L*a*b*) established by the Commission Internationale de l'éclairage (CIE) is commonly used to quantify colors using colorimeters.
It is called L*a*b* (Elster-Aester-Biester) color space to distinguish it from the original Hunter Lab color space (official name: Hunter 1948 Lab), which was devised based on the human visual sense to make color differences as even as possible for human discrimination.
In L*a*b* color space, colors are represented by three axes: the L* axis for lightness, and the a* and b* axes for chromaticity (hue and saturation). Each axis is arranged as shown in Figure 1, with L* values ranging from 0 to 100, where L*=0 corresponds to the brightness of black (a state in which light is completely absorbed) and L*=100 corresponds to the brightness of white (100% reflectance) with perfect diffuse reflection. a* axis represents the red (+a*) to green (-a *) direction, while the b* axis represents the yellow (+b*) to blue (-b*) direction. In this case, in the a*b* plane, the direction from the origin to any coordinate corresponds to hue (color tone), and the distance from the origin to any coordinate corresponds to saturation (vividness). In other words, the farther outward the color is, the more vivid it is, and the farther inward the color is, the duller it is.
As mentioned above, the range of L* coordinates is defined as 0 to 100, but the range of a* and b* coordinates is not univocal. This is because the L*a*b* color space is a conversion of a master color space (such as CIE 1931 XYZ), and the values vary depending on the source color space.
In recent years, CIE DE2000, which has been improved to eliminate differences from human visual results in the CIE color space, has been introduced.
The color management method, which digitizes and manages colors by measuring spectral characteristics with high precision using spectrophotometers, expressing colors numerically using the L*a*b* color space, and using matching technology to match the color of the target product to a reference color, is becoming increasingly important in the future.
*Including some distributors, etc.
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117 products found
117 products
Konica Minolta Japan Co., Ltd.
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■All-in-one spectrophotometer CM-5 with all functions such as display and operation buttons integrated "Color" is now measured not only in automobi...
Murakami Color Technology Institute Co., Ltd.
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■Using unique technology, yellowing of the integrating sphere due to xenon lamp irradiation is drastically reduced. This is a spectrophotometer des...
F.C.R. & Bio Co., Ltd.
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■Features ・[Function] Specialized in color measurement function. ・Measurement values of L×a×b can be obtained, but color difference measurement...
X -Light
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Set the coloring standard The EXACT standard for printing companies and packaging printers is the industry -leading light -class spectroscopic met...
Yagyu Shokai Co., Ltd.
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■Features - Compatible with ISO standards M0, M1, M2, and M3. ・In addition to common measurement items, the standard can display color difference ...
Yukosha Shito Trading Co., Ltd.
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Ihara Electronics Industry Co., Ltd.
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Features ■Color graphic LCD ・Measure by displaying the approximate color of the measurement location ・Possible to visually check the location ■H...
Konica Minolta Japan Co., Ltd.
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■Summary This measuring instrument is a stationary horizontal colorimeter model with an integrating sphere D/8 type that can measure color and glos...
Pico Co., Ltd.
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Suncolor Co., Ltd.
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Murakami Color Technology Institute Co., Ltd.
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Tetsutani
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SPECTRO 2 Guide (spectroscopic colored meter / color difference) is a measuring device that has a total solution that combines a color meter, fluor...
2 models listed
X -Light
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Various tool set provides high quality data EXACT Advanced corresponds to the strict standards of the inkroom, quality control lab, printing and p...
Konica Minolta Japan Co., Ltd.
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■Summary ・This measuring instrument is a 6-angle multi-angle model spectrophotometer that exhibits outstanding power in automotive exterior measur...
Asahiko Trading Co., Ltd.
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■Summary UPRtek 2D Imaging Colorimeter is a system that measures two-dimensional images with a built-in spectral radiance meter and XYZ filter. In ...
Murakami Color Technology Institute Co., Ltd.
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■Reproducibility and instrumental error for both reflected and transmitted color measurements are among the highest in the industry. Advanced optic...
2 models listed
X -Light
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Accurately measure the color of the flexible film You can choose from two configurations for the EXACT XP spectroscopy. "Standard" or "Advanced". ...
Konica Minolta Japan Co., Ltd.
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■Shape that fits firmly in your hand By locating the center of gravity around the measuring instrument body, wobbling during measurement is suppres...
2 models listed
Asahiko Trading Co., Ltd.
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■Summary The OL750 is a highly versatile spectroradiometric measurement system that can perform various optical radiation measurements in the ultra...
Pico Co., Ltd.
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Making measurement of luminous flux (lumens) and luminous intensity (candela) of LEDs on a substrate familiar The Feasa LED Spectrometer spectrome...
Konica Minolta Japan Co., Ltd.
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■Main uses Color management of resin parts, automobile interior parts, paint, glass, etc. ■Two in One allows you to measure the color and gloss of...
Asahiko Trading Co., Ltd.
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■Summary The system is particularly suited for testing and characterizing high-resolution LCDs, mini-LEDs, OLEDs, quantum dot displays, backlights,...
X -Light
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CMYK job JIT system Looking for a device that can easily measure the concentration of the printing press? The EXACT Basic density dedicated for CM...
Asahiko Trading Co., Ltd.
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■Summary This is a spectroradiometer that specializes in a wide dynamic range from black to white. Achieves wide dynamic range measurement without ...
Konica Minolta Japan Co., Ltd.
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■Summary This measuring instrument is a stationary horizontal colorimeter model with an integrating sphere D/8 type exclusively for reflection meas...
Murakami Color Technology Institute Co., Ltd.
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■Stable monitoring for long periods of time during the color process is possible. This is a monitoring device for process control that can provide ...
Asahiko Trading Co., Ltd.
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■Summary ・This is a top model among spectroradiometers with excellent accuracy, measurement speed, and dynamic range. - Divided into visible model...
X -Light
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Are you changing the colors frequently during production? Also, is it too long for the change work or wasted the base material? The X-Rite Vericolo...
Konica Minolta Japan Co., Ltd.
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■Summary book The measuring instrument is a stationary vertical colorimeter model with an integrating sphere D/8 type that can measure color and gl...
Asahiko Trading Co., Ltd.
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■Summary - Portable measuring instrument equipped with a full-color touch panel screen, rechargeable battery, and SD card. -Weight is reduced to 1....
