Illumination Techniques Commonly Used in Metallographic Microscopy
1. Direct lighting: The light is directly directed at the object to obtain a clear image. This type of light is very effective when we need to get high contrast objects. But when we use it to shine on bright or reflective objects, it will cause specular reflections.
2. Dark Field: Light is projected onto the surface at an angle, and the result is oblique astigmatism that travels to the camera, creating bright spots on a dark background or field of view. With this lighting method, if there is no color difference on the surface of the object, nothing can be seen through the visual system. Both observation methods are usually equipped in metallographic microscopes.
3. Backside illumination: Light from the back of the object with a uniform field of view, and the side profile of the object can be seen through the camera. Backside illumination is often used to measure the size and orientation of objects.
4. Diffuse lighting: reflective lighting, providing a non-directional, soft light like harsh shadows, which is most suitable for highly reflective objects. Because of this lighting effect we liken this light to a peaceful, non-directional light on an overcast day.
5. Coaxial lighting: The coaxial light forms a uniform surface light source emitted in the vertical direction, and through a semi-transparent mirror with a 45-degree angle, the light source illuminates the surface of the object in a vertical downward manner. This type of light source is especially helpful for inspecting highly reflective planar objects.
Application fields:
Auto parts, hydraulic lubrication, bearings, engines, steam turbines, aviation, semiconductors, data storage, medical equipment, communications, precision instruments, wear monitoring of large industrial and mining equipment and other industries.
System overview Process design, more intuitive operation
1. The simple interface brings you a smooth operation experience
2. Conform to ISO16232, VDA19, ISO4406, ISO4407 standards, support user-defined standard ISO 16232 measurement parameters - caliper diameter definition: the long distance between two parallel circumscribed straight lines of particles.
3. Background calibration
Since the unevenness of the illumination source may lead to dark circles around the image, affecting the overall image quality, the background calibration function can effectively avoid this problem.
4. Automatic photo taking, image stitching
The scanning process is automatically photographed and saved, and the progress is visible in real time; the photo information is stored in the database for easy query. Provide field of view picture browsing and checking function.
5. Statistics, modification, and diversified result display
The system automatically identifies particles, automatically counts particle parameters, automatically analyzes particle types, and supports modification of particles. A variety of result display tools are provided.
6. Automatic identification of metal particles, non-metal particles, fibers
The system automatically identifies particles, and can simultaneously check out non-metallic particles, metal particles, and fibers. Three types of particles are checked and classified. It supports setting the qualified intervals of various particles. Supports customizing the distinguishing settings of the three particles.
