Reading Methods of a Reading Microscope
A reading microscope is used to measure small distances or changes in small distances. Its structure is divided into mechanical and optical parts. It consists of a hundred telephoto microscopes, which are mounted on a sliding platform driven by a screw. This sliding platform, together with the microscope, can be installed in different directions. Can move forward, up and down, left and right; Or align downwards and move left and right. The sliding table is installed on a large base. (Figure 1-13) The range of a reading microscope is generally a few centimeters, with a division value of 0.001 centimeters. The mechanical part of a common reading microscope is manufactured based on the principle of a spiral micrometer, with a scale disk linked to a threaded rod with a pitch of 1 millimeter and divided into 100 equal grids. Therefore, its
The division value is 0.001 centimeters. Another type is to use a measuring eyepiece with a 0.01mm ruler to measure small displacements.
Operation steps of reading microscope:
1. Install the reading microscope appropriately and align it with the object to be measured;
2. Adjust the eyepiece of the microscope to clearly see the crosshair (or ruler);
3. Adjust the concentration of the microscope or move the entire instrument to make the image of the test object clear and eliminate parallax, that is, when the eyes move up and down, there is no relative movement between the image formed by the crosshair and the test object;
4. First align the fork wire with a point (or line) A on the object to be tested, and record the reading; Rotate the screw and align it with point B, then record the reading. The difference between the two readings is the distance between AB. Note that the screw must only move in one direction during two readings to avoid pitch differences.
