Illumination system in iron and steel metallographic experiment technology

Lighting System in Metallographic Testing Technology

Metallographic experiments are one of the most important methods of material structure identification. With high resolution, it can make a detailed investigation of material structure and state. The light source for metallographic experiment is the same as with other optical techniques, its basic role is to produce illumination. We can also understand it as shining a certain direction and a certain intensity of light onto the specimen.

In order to carry out metallographic testing, a good light source is necessary: the illuminator used in metallographic experiments must have enough brightness, even and diffused illumination distribution, high color temperature and good movement.

1.Brightness

Brightness is the most important factor to consider when choosing a light source for metallographic testing. The brightness of the light source is related to the magnification used in the experiment. The greater the magnification is, the higher the brightness must be. In general, when using 50X-500X magnification, it is recommended to select illuminators with at least 2000 lux of brightness.

2.Uniformity

For the lighting system of metallographic experiments, uniformity of the illumination is very important, because the uneven light will lead to interference in the observation process, which will cause the observed images to be totally the same or difficult to interpret. The lighting system used in metallographic experiments must have excellent uniformity, generally within ±3%.

3.Color temperature

As we all know, the human eye will be influenced by the color of the illumination, and the color of the illumination will have an effect on your visual observation. Color temperature is an important part of the illuminator, it is related to the color of the light source. Metallographic experiments require the illuminator to have a color temperature of 6500-7500K; that is, a high color temperature illuminator.

4. Mechanism

Certain movements are often required in the process of metallographic testing, such as using a beam of light to move and scan the observation object. These operations can be achieved by adjusting the light sources direction, angle and so on. In order to meet the requirements of metallographic testing, it is necessary to choose an illuminator that has a reasonable movement mechanism design.

In conclusion, the light source has a very important effect in the process of metallographic testing. The illuminator needs to have good brightness, uniformity, color temperature and reasonable movement mechanism design, to meet the needs of the experiment and ensure the accuracy of the results.

Lighting System in Ferrography

Ferrography is an experimental technique commonly used in the field of metallography to analyze the composition, structure, and properties of iron and steel samples. It uses optical microscopy and digital imaging analysis to identify elements such as carbon, phosphorus, sulfur, silicon, and molybdenum. To perform a successful ferrography experiment, the experimenter needs a lighting system that is bright enough to adequately illuminate the sample being studied.

A ferrography system typically uses a fluorescent light box or a halogen light box. Fluorescent lighting is often chosen for its lower cost, lower heat output and even lighting. Halogen lighting provides improved visibility and color perception and is often chosen for higher end applications.

In addition to the lighting system, a ferrography system typically includes a digital imaging system, optical microscope, compound microscope, and a microscope illuminator. The digital imaging system captures images of the sample specimen and stores the images in a computer for later viewing. The optical microscope and compound microscope both provide magnified views of the sample specimen and can be used to analyze its composition, structure and properties. The microscope illuminator provides light to illuminated the sample specimen so that researchers can clearly identify the elements present in it.

Ferrography is a powerful tool for analyzing iron and steel samples and providing a wealth of information about their composition, structure, and properties. The use of a quality lighting system is essential for performing successful ferrography experiments. Fluorescent lighting tends to be the more cost-effective choice, while halogen lighting is often preferred for applications requiring superior visibility and color perception. Regardless of the type of lighting system chosen, the use of a digital imaging system, optical microscope, compound microscope and microscope illuminator are all essential components of a successful ferrography experiment.