A Brief Discussion on Optical Contact Angle

1、 Overall classification of contact angle tester:
The existing contact angle meters are mainly divided into the following three categories:
1. Angle measurement instrument: This type of instrument is based on the most advanced lens cross shaped angle measurement. Specifically, when it comes to contact angle analysis methods, they will all specify that they are angle measuring instruments. (Please pay attention to the differences in English names).
2. Standard contact angle meter: This type of instrument usually uses CCD+software system. In terms of analysis methods, they are no longer limited to simple contact angle analysis stages such as high angle measurement, but are based on simple curve analysis. This type of instrument is now widely used abroad. However, it will be influenced by the theoretical assumptions of interface chemistry.
3. Contact angle meter: This type of instrument has an optical system that strives to obtain high-definition images, avoiding the influence of background noise.

2、 Selection of Optical Imaging Systems and Contact Angle Meters
The quality of the optical imaging system directly affects the contact angle software analysis. After all, no matter how advanced the computer system is, it cannot directly recognize images like humans. Therefore, the progressiveness of optical system design is all the key.
Usually, we use a lens with a certain magnification and a CCD. The specific imaging effect can only be clearly understood by looking at the actual picture. But the standard for good imaging effect can be that the image background is clear and does not affect the overall observation. The prospect has good imaging, specifically in terms of realism, which we consider to be metallic.

3、 Selection of contact angle host and contact angle meter
The host of the contact angle meter is mainly reflected in its overall stability and ease of operation. These will involve the accuracy of focusing, overall stability, compliance between host design and software design, and so on.
But more importantly, there is a more important factor in the design of the host, which is the shape of the test sample and the volume (length, width, height) of the measurable sample. Shanghai Zhongchen can customize various types of hosts. We suggest taking this factor into consideration when making a purchase, otherwise it may be discovered through testing that it cannot be completed.
Meanwhile, the design of the host will vary depending on the operation you want to complete. These must be confirmed with the manufacturer's sales engineer. But if the other party's engineer is not familiar with some key technologies of the host design, it means that he also does not understand the application of the overall contact angle meter, and you may indeed need to consider whether to purchase the instrument from them.