All Categories
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.
Table of Contents
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.
Sort by Features
Number of Employees
Newly Established Company
Company with a History
X -Light
200+ people viewing
Last viewed: 18 hours ago
■ MA-T12, MA-T6, and MA-5 QC are the highest portable multi-angle spectrometer in the market. It has a color imaging and a multi -angle spectroscop...
Yukosha Shito Trading Co., Ltd.
50+ people viewing
Last viewed: 4 minutes ago
■What is a handy colorimeter for flexo/offset printing? Cyto flexo printing color measuring instruments make measurement and numerical control duri...
X -Light
240+ people viewing
Industry's top class non -contact type measurement function It is very important to measure industrial products such as painting, plastic, and cos...
X -Light
200+ people viewing
Last viewed: 1 day ago
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...
X -Light
260+ people viewing
Last viewed: 1 day ago
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...
Nippon Director
310+ people viewing
Last viewed: 6 hours ago
For the PF 7000 type, the wavelength range of 400 nm to 700 nm is measured at 10 nm interval output and the "paper / board paper and pulp ISO white...
Mysec Co., Ltd.
40+ people viewing
Last viewed: 3 hours ago
■CM-26dG This is an integrating sphere D/8 type portable colorimeter that achieves the highest level of instrumental error and repeatability. Simul...
Oki Riko Jizai Co., Ltd.
40+ people viewing
■Summary All-in-one spectrophotometer with all functions integrated. Compatible with Gardner-Hazen units and iodine color numbers. European Pharmac...
Tokyo Instruments, Inc
40+ people viewing
Last viewed: 21 hours ago
■Portable spectrophotometer ・Color measurement of objects, development of paints and inks, color management of food oils and fats and chemical pro...
F.C.R. & Bio Co., Ltd.
20+ people viewing
■Features ・[Function] Specialized in color measurement function. ・Measurement values of L×a×b can be obtained, but color difference measurement...
Pico Co., Ltd.
20+ people viewing
Last viewed: 3 hours ago
■Making LED inspection more familiar and reliable ・Full spectrum analysis of all visible LEDs from low brightness to high brightness. ・Can be use...
Pico Co., Ltd.
30+ people viewing
Last viewed: 6 hours ago
Making measurement of luminous flux (lumens) and luminous intensity (candela) of LEDs on a substrate familiar The Feasa LED Spectrometer spectrome...
Asahiko Trading Co., Ltd.
30+ people viewing
Last viewed: 22 hours ago
■Summary A high-precision spectroradiometer calibrated with a NIST-compliant standard light source. By combining with various accessories, it is po...
Asahiko Trading Co., Ltd.
30+ people viewing
■Summary ・MK350N Premium is a handheld spectrometer equipped with the minimum necessary functions. -Flicker can be measured in addition to the bas...
Asahiko Trading Co., Ltd.
40+ people viewing
Last viewed: 1 day ago
■Summary ・MK350S Premium is a handheld spectrometer equipped with multiple functions. - Equipped with a touch panel display and supports Japanese ...
Asahiko Trading Co., Ltd.
40+ people viewing
Last viewed: 17 hours ago
■Summary ・PG200N is a handheld spectrometer with separate receiver. ・The light receiving part and display part can be connected and separated usi...
Asahiko Trading Co., Ltd.
30+ people viewing
Last viewed: 7 hours ago
■Summary ・SpectraPen LM510 is a handheld spectroradiometer ideal for research and agricultural use. -Visible light (340-790nm) version and near-in...
Asahiko Trading Co., Ltd.
40+ people viewing
Last viewed: 10 hours ago
■Summary - Portable measuring instrument equipped with a full-color touch panel screen, rechargeable battery, and SD card. -Weight is reduced to 1....
Asahiko Trading Co., Ltd.
20+ people viewing
■Summary ・This is a top model among spectroradiometers with excellent accuracy, measurement speed, and dynamic range. - Divided into visible model...
Asahiko Trading Co., Ltd.
40+ people viewing
Last viewed: 15 hours ago
■Summary This is a spectroradiometer that specializes in a wide dynamic range from black to white. Achieves wide dynamic range measurement without ...
Asahiko Trading Co., Ltd.
30+ people viewing
Last viewed: 19 hours ago
■Summary The OL750 is a highly versatile spectroradiometric measurement system that can perform various optical radiation measurements in the ultra...
Asahiko Trading Co., Ltd.
30+ people viewing
Last viewed: 1 day ago
■Summary The system is particularly suited for testing and characterizing high-resolution LCDs, mini-LEDs, OLEDs, quantum dot displays, backlights,...
Asahiko Trading Co., Ltd.
20+ people viewing
Last viewed: 17 hours ago
■Summary UPRtek 2D Imaging Colorimeter is a system that measures two-dimensional images with a built-in spectral radiance meter and XYZ filter. In ...
Pico Co., Ltd.
20+ people viewing
Last viewed: 3 hours ago
For stable LED brightness inspection The Feasa optical head was designed to stably test the brightness of LEDs. The rugged, compact design allows ...
