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What are Colorimeters?

11/14/2013 3:12:53 PM | by Anonymous

Colorimeters

Colorimeters are used in the colorimetry process. Colorimetry is the process of analyzing chemical substances to gather data about its concentration. The colorimetry process starts with shining a light source through the substance and then analyzing the absorption of light by the substance. This is where colorimeters are used to accomplish this task. The colorimetry process aims to find out the clarity, quality and composition of the substance.


A colorimeter is a tool that measures how much light is going through an object and how much light the object absorbs. Colorimeters are extremely sensitive to light and they measure the light source based on the three basic colors green, blue and red. This makes it similar to the human eye as the human eye also assesses colors through these 3 basic colors. During the colorimetry process, when the light is being passed through the object chances are that it will absorb the light, even though it may be a small amount. A colorimeter measures the light by taking the reflected light that bounces of the test object. Colorimeters follow beer lambert’s law which says that the amount of light absorbed by an object will be directly proportional to its concentration.


Colorimeters may come in many forms and types. Each type of colorimeter has its own purpose. One example of a colorimeter is the color densitometer. Color densitometers measures and compares the density of the three basic colors red, green and blue. Another example is the color photometer. Color photometers measure the transmission and reflection of the color of the light. Colorimeters may also use many various mechanisms to measure the absorption of light. Two of the mechanisms are the digital mechanism which is also known as laboratory mechanism and portable mechanism. Digital colorimeters are normally used in stationery situations such as in a laboratory for sampling purposes or in classrooms to teach the students. Portable colorimeters on the other hand can be easily transported to sampling locations to test the soil or water without having to collect any samples.


A colorimeter is quite simple and it works by shining a light source through the object. The more concentrated the object is, the more light it will absorb and the colorimeter measures the light that comes out of the object. The colorimeter then measures it with the original light intensity of the light source. The results are the difference between the intensity of the original light source and the intensity of the light after it has passed through the object. This process happens several times to get multiple results. The results are then put into a graph which is used to form a calibration curve. The two axis of the curve are the amount of light absorbed and the concentration of light passed through. This curve is then used as a standard to compare with other existing sources to more accurately determine the concentration of light and the absorption of light. Some colorimeters also have the function to automatically produce calibration curves for further convenience.


Colorimeters are used widely in many industries and applications. Colorimeters which are smaller in size can be used to measure the brightness and color contrast of the screens on computers or televisions. This allows the user to adjust the display settings to his or her preference. Colorimeters are also used in printing machines where it is an essential tool to manage the colors in the system. The colorimeters also check the electrical parts of the printer and quality of paper to measure the overall quality if the image and the ink.


Colorimeters are more important than people think and each type of colorimeters achieves a specific purpose. Without colorimeters we would not be able to enjoy good images on our media screens or not have good images when we print documents.

 

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