Introduction to the imaging rules of convex lenses in metallographic microscopes
In a metallographic microscope, when an object is located outside the double focal length of the lens, a reduced inverted real image is formed within the double focal length of the image and outside the focal point;
When the object is located at twice the focal length of the lens object, an inverted real image of the same size is formed at twice the focal length of the image side; This type of imaging is crucial for the optical path of metallographic microscopes.
When an object is located within twice the focal length of the lens and outside the focal point, an enlarged inverted real image is formed outside the double focal length of the image;
When the object is located at the focal point of the lens, the image cannot form an image; This is also an important factor affecting the imaging of metallographic microscopes.
When an object is located within the focal point of the lens object, there is no image formation in the image direction, and an enlarged upright virtual image is formed on the same side of the lens object further away from the object.
How to purchase a metallographic microscope
1. Imaging quality
Imaging is crucial for analyzing workpieces using a metallographic microscope, and clear images are referred to as sharp images in the field of metallography. It must meet the four basic conditions of high contrast, high brightness, good color reproduction, and high resolution. Contrast, brightness, and color reproduction are precisely the areas that users tend to overlook when selecting, blindly pursuing resolution can lead to selection failure.
2. Mechanical stability
Having good imaging quality is not enough, it should continue to maintain a high-quality state over time. We call this "mechanical stability" because metallographic microscopes are not low value consumables, and their normal service life should be over 30 years. In this regard, it is recommended that users focus on the following points: 1. Raw materials 2. Manufacturing accuracy 3. Mechanical design. For example, when using the coarse adjustment control knob of a metallographic microscope frequently, will it be very uneven and often feel heavy.
