The Application of XD Laser Interferometer in Measurement and Testing Industry

Laser Interferometer and metrological detection
With the rapid development of computer and electronic technology, the CNC machine tool industry has also made great progress, and the measurement and detection requirements are becoming more and more efficient and refined. So how to evaluate the quality of CNC machine tools, the accuracy level has become an important factor. Laser interferometer is an efficient and accurate detection equipment for CNC machine tools, CMMs, length measuring machines, etc.
The laser interferometer uses the He-Ne laser as the carrier and uses the Michelson interferometer system to measure the general length of displacement. It is recognized as a high-precision and high-sensitivity measuring instrument so far, and is widely used in high-end manufacturing fields. The use of laser interferometer avoids the disadvantages of traditional manual detection, such as low efficiency, poor accuracy, and interference by human factors. It is efficient, fast and convenient. Especially in the field of measurement and detection, it has become extremely efficient and irreplaceable equipment.
In this case, we will introduce the application characteristics and advantages of API XD Laser series laser interferometer in the fields of coordinate, displacement sensor and length measuring machine.
1. Measurement of three-coordinate indication error by laser interferometer

With the update and development of CMM technology, the traditional measurement and detection methods have been unable to meet the detection requirements of large CMMs. When the physical standard can not meet the measurement requirements, the laser interferometer is used to detect the position indication error. So as to reduce the system error and ensure the stable operation of CMM and the accuracy and reliability of measurement data.

2. Displacement sensor detection
The application of laser interferometer to detect the positioning sensor has become a major development trend, which is characterized by high measurement accuracy, fast response speed and easy digital measurement. Generally, a precision guide rail is designed, and the reflector and the measured sensor are placed together for synchronous detection, so as to form a comparison: that is, the automatic detection system of the displacement sensor is tested and compared with the positioning of the laser interferometer, and the reciprocating test results are obtained.
3. Verification of length measuring machine
As the main equipment in the measuring and testing room, the length measuring machine has high frequency of use and strong versatility, and needs to be tested regularly.
The indication error of the traditional micrometer scale of the length measuring machine is verified with a large number of third-class blocks and segmented special measuring tools. This method has high environmental requirements, and the calibration method is cumbersome. How to accurately calibrate the indication error of the micrometer scale of the length measuring machine is an inevitable problem in the verification of the length measuring machine.
It is fast and accurate to calibrate the indication error of the decimeter scale of the length measuring machine with a laser interferometer, which can effectively eliminate the influence of instrument temperature and ambient temperature on the verification results.
Application characteristics of PI brand XD Laser Interferometer
API brand XD Laser series laser interferometer is divided into 1D/3D/5D/6D models according to different needs of users.
·1D model can be measured once: positioning accuracy, repeated positioning accuracy, reverse clearance;
·3D model can be measured at one time: positioning accuracy, repeated positioning accuracy, reverse clearance, straightness of guide rail in horizontal direction, straightness of guide rail in vertical direction, and perpendicularity between two axes (pentaprism attachment is required);
·Model 5D can be measured at one time: positioning accuracy, repeated positioning accuracy, reverse clearance, straightness of guide rail in horizontal direction, straightness of vertical direction, perpendicularity between two axes (pentaprism attachment is required), pitch angle and yaw angle;
·The 6D model can be measured at one time: positioning accuracy, repeated positioning accuracy, reverse clearance, guide rail horizontal straightness, vertical straightness, perpendicularity between two axes (pentaprism attachment required), pitch angle, yaw angle, and rolling angle.

According to the accuracy grade, it is divided into precision type and standard type.
·Precision: 0.2 μ m;
·Standard precision: 0.5 μ m.

The XD Laser interferometer is simple in structure and easy for users to master; One dimming can measure multiple parameters, reducing the workload of users to frequently change the mirror group and adjust the light; All parameters are generated by primary measurement, with good data base and high consistency. Data reliability is guaranteed during secondary development; No tripod is needed to effectively avoid the impact of external vibration sources on measurement, and it is convenient to carry.
The API brand XD Laser interferometer is widely used in machine tool manufacturing, aerospace, military equipment, measurement and detection, university scientific research, vocational Training, medical equipment, 3C manufacturing and other fields, and has been recognized and praised by the majority of users.