Device for changing illuminance of auto-collimation electronic theodolite in cooperation with gun calibration mirror calibration

The utility model relates to a device for changing illuminance of an auto-collimation electronic theodolite in cooperation with gun calibration mirror calibration, and belongs to the technical field of metering detection. The device comprises a light source (1), vegetable parchment (2) and a collecting lens (3), the parchment paper (2) is arranged between the collecting lens (3) and the light source (1) and is used for reducing the illuminance of the light source (1); divergent light emitted by the light source (1) is focused into linear light through the collecting lens (3) after the illuminance of the divergent light is reduced through the parchment paper (2). Comparing existing techniques, the utility model has a simple structure, easy implementation, the illuminance change of the auto-collimation electronic theodolite can be realized only by utilizing the existing auto-collimation electronic theodolite and sulfuric acid paper which is easy to purchase and low in price on the market; the auto-collimation e