How to read microscope
The reading microscope is used to measure small distances or small changes in distance. Its construction is divided into mechanical part and optical tool part is one hundred a telephoto microscope, mounted on a sliding such as driven by a silk rod, this sliding table together with the microscope can be mounted in different directions. Can be aligned in front, up and down, left and right movement; or aligned below, left and right movement. The sliding stage is mounted on a large base. A reading microscope typically has a range of a few centimetres and a graduated value of 0.001 centimetres. The mechanical part of a common type of reading microscope is based on the principle of the spiral micrometer, a graduated disc linked to a filigree rod with a pitch of 1 mm about 100 equal compartments. It is therefore graduated to 0.001 cm. There is also a type of measuring eyepiece with a 0.01 mm scale to measure small displacements.
Steps for operating a reading microscope:
1. Set up the reading microscope properly and align it with the object to be measured;
2. Adjust the eyepiece of the microscope to clearly see the forked filament (or scale);
3. Adjust the gathering of the microscope or move the entire instrument, so that to be asked to test the object imaging is clear, and eliminate parallax, that is, when the eyes move up and down, see the fork filament and the object to be tested into the image of no relative movement between;
4. First, let the fork filament aligned to the object to be measured on a point A (or a line) A, write down the readings; rotate the silk rod, aligned with another point B, and then write down the readings, the difference between the two readings that is the distance between AB. Note that the two readings when the screw must only move in one direction to avoid pitch difference.
