Industry pain point
Surface microscopic defects affect the installation accuracy of optical components
Although granite texture is hard, but in the process of processing, its surface may still produce microscopic cracks, sand holes and other defects. These minor defects are imperceptible to the naked eye, but can have a significant impact on the installation of optical components. For example, when the high-precision optical lens is installed on the granite platform with microscopic defects, the ideal tight fit between the lens and the platform cannot be achieved, resulting in the optical center of the optical lens being offset, which affects the optical path accuracy of the entire optical detection equipment, and ultimately reduces the detection accuracy.
The release of internal stress in the material causes deformation of the platform
Although granite after a long natural aging, but in the mining, processing process, the internal stress will still change. Over time, these stresses are gradually released, which can cause deformation of the granite platform. In the optical inspection equipment with high precision requirements, even the extremely small deformation may cause the deviation of the detection optical path. For example, in precision optical detection instruments such as laser interferometers, the slight deformation of the platform will cause the displacement of the interference fringe, resulting in errors in the measurement results and seriously affecting the reliability of the detection data.
It is difficult to match the thermal expansion coefficient of optical element
Optical inspection equipment usually works in different temperature environments, at this time, the difference between the thermal expansion coefficient of granite and optical components becomes a major challenge. When the ambient temperature changes, due to the inconsistent coefficient of thermal expansion between the two, it will produce different degrees of expansion, which may cause relative displacement or stress between the optical element and the granite platform, thereby affecting the alignment accuracy and stability of the optical system. For example, in a low temperature environment, the contraction degree of granite is different from that of optical glass, which may lead to the loosening of optical components and affect the normal operation of detection equipment.
solution
High precision surface treatment process
Using advanced grinding and polishing technology, the granite surface is processed with ultra-precision. Through a number of fine grinding processes, with high-precision CNC equipment, can effectively eliminate the surface of the microscopic defects, so that the surface of the granite flatness up to nanometer level. At the same time, cutting-edge technologies such as ion beam polishing are used to further optimize the surface quality, ensure that the optical components can be accurately installed, minimize the optical path deviation caused by surface defects, and improve the overall accuracy of optical inspection equipment.
Stress relief and long-term monitoring mechanism
Before granite processing, the depth of thermal aging and vibration aging treatment to maximize the release of internal stress. After the machining is completed, the advanced stress detection technology is used to carry out comprehensive stress monitoring on the platform. At the same time, establish long-term equipment maintenance files, and regularly detect the deformation of the granite platform. Once the slight deformation caused by stress release is found, it is corrected in time through the precision adjustment process to ensure the stability of the platform during long-term use and provide a reliable foundation for the optical inspection equipment.
Thermal management and material matching optimization
In view of the difference in the coefficient of thermal expansion, on the one hand, a new thermal management system is developed to keep the temperature inside the optical detection equipment within a relatively stable range by accurately controlling it, reducing the material expansion caused by temperature changes. On the other hand, in the selection of materials, fully consider the matching of the thermal expansion coefficient of granite and optical components, select granite varieties with similar thermal expansion coefficient, and carry out the corresponding optimization design of optical components. In addition, intermediate buffer materials or flexible connection structures can also be used to alleviate the stress caused by the difference in thermal expansion between the two, to ensure that the optical system can operate stably in different temperature environments, and to improve the environmental adaptability and detection accuracy of the detection equipment.
Post time: Mar-24-2025