The structure of the scale！

The grating is made up of two parts: the ruler grating and the raster reading head. The ruler grating is generally fixed to the machine fixture, and the grating reading head is mounted on the machine tool moving parts, indicating that the grating is mounted in the grating reading head. The figure on the right shows the structure of the scale. [1] The key part of the raster detection device is the raster reading head, which consists of light
  Grating scale source, convergence lens, indicating grating, optoelectronic components and adjustment mechanism and other components. Grating read head structure in many forms, according to the reading head structure and use of the situation is divided into direct receiver reading head (or silicon photovoltaic readings head, mirror read head, beam read head, metal grating reflective reading head).

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