Research On Rapid Detection Methods Of Optical Component Defects

Surface defects of optical components are one of the most important factors affecting their appearance and quality,and defects can have a huge impact on the operation of optical components and even the entire optical system.In order to ensure the normal use of optical components and the stable operation of optical systems,it is important to detect surface defects of optical components quickly and accurately.To address the problems of slow detection speed,low efficiency and high cost of optical component surface defects detection,a rapid detection method based on the principle of polarization scattering is cited,and two rapid optical component surface defects detection devices are designed,namely a reflective detection system and a transmissive detection system.The feasibility and accuracy of the inspection method is verified through simulation and experimentation to achieve fast and efficient classification of a large number of optical components to meet the initial classification of a large number of optical components and optical lenses produced by a company.Based on the designed inspection system,the FRED optical simulation software is applied to build a simulation system for optical component surface defect detection,and the models of light source,deflector,polarizing beam splitter,deflector and experimental sample are established in turn.The energy of the scattered light from the defect is calculated,and the correspondence between the simulation data and the defect is analyzed.Through the simulation of the reflective and transmissive detection systems,it is confirmed that the scattered light energy detected by the receiver gradually increases with the increase of the normal deviation angle in the effective range of the system model,which is in line with the linear relationship between the detected data value and the increase of the severity of the defect.Then,based on the relevant principles and simulation model,a reflective experimental testing device is built using a polarizing plate and polarizing beam splitter,a He-Ne laser,a photodetector and a data measurement module.Taking a mobile phone lens as an example,the defective condition of the lens is detected in a reflective inspection device,and the energy level of the scattered light intensity of the defect is measured,and a database of the scattered light intensity of the defect is established.The lenses were then classified into qualified,critical and unqualified products by combining the known fault determination criteria with the voltage threshold of the mobile phone lens qualification criteria.The scattered light intensity obtained from the inspection of 130 mobile phone lenses corresponded to the defective condition of the lenses.The experimental results show that the rapid detection of surface defects of optical components based on polarization scattering characteristics can achieve rapid assessment and determination of the surface quality of mobile phone lenses,proving the feasibility of this detection method,which can be applied to the detection of surface defects of optical components and the rapid classification of optical components in enterprises,achieving a single component testing time of less than 0.5s,meeting the requirements of enterprises for efficient inspection of large quantities of optical components and optical lenses.