Adjustment of the microscope lifting structure
1. The lifting mechanism of the straight tube microscope concentrator includes: 1. celluloid washer 2. large head screw 3. eccentric toothed rod sleeve 4. toothed rod 6. lifting handwheel 7. double eye nut adjustment. When adjusting the double eye nut, insert one hand into the double eye nut on the handwheel end face with a double eye nut wrench, and insert the other hand into the large head screw slot on the other end with a screwdriver. Tighten it firmly to stop sliding.
2. The lifting mechanism of the condenser of the oblique tube microscope:
When adjusting, first use a screwdriver to retract the retaining screw in the middle of the double eye nut by 1-2 turns. The bearing washer is tightly fitted with the retaining screw, so it will also retract together and detach from the end face of the gear rod. Then, use a double eye nut wrench to screw the double eye nut into the adjustment seat. At the same time, use the other hand to rotate the handwheel for testing until the lifting mechanism is properly tightened and can stay in any position, then stop the rotation of the double eye nut. Finally, insert the retaining screw and make the bearing washer contact the gear rod. The reason why this adjustment can eliminate the fault is because the inner hole of the adjustment seat is conical. The tapered shaft sleeve has a groove in the axial direction. When the double eye nut 1 is screwed inward, the conical sleeve is pushed inward, causing the slot to become smaller and the inner hole to shrink as the conical sleeve advances, clamping the gear rod tighter and increasing the frictional resistance of gear rotation, thereby preventing automatic descent
Imaging law of convex lens in metallographic microscope:
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.
