Optical film refers to the coating or coating of one or more dielectric films or metal films or a combination of these two types of films on optical elements or independent substrates to change the transmission characteristics of light waves, including light transmission, Reflection, absorption, scattering, polarization, and phase change.
First, optical film materials
Optical grade polyester film is made of optical grade polyester raw material, which is produced by multilayer co-extrusion and biaxial stretching. It has excellent optical properties such as low haze and high light transmittance, high surface finish, and small thickness tolerance. The main substrate of optical film for OEM optical thin film manufacturer. Due to the high technical threshold of optical grade polyester film, it has extremely high requirements on raw resin materials and film processing equipment, and the cleanliness requirements of the processing workshop are extremely high. The existing domestic polyester film production lines cannot be produced. Polyester film has a small production capacity, and a large amount of optical-grade polyester film required for the development of the optical film industry needs to be imported from abroad.
Second, the production method of high precision optical thin film
Optical film production methods are mainly divided into dry and wet production processes. The so-called dry method is that no liquid appears in the entire processing process. For example, vacuum evaporation is in a vacuum environment. The solid raw materials are heated with electrical energy. After sublimation into gas, they are attached to the surface of a solid substrate to complete coating machining. The general method of wet coating is to mix ingredients with various functions into a liquid coating, apply it to a substrate in different processing methods, and then dry and solidify the liquid coating to make a product.
Third, optical thin film design analysis software
Even very small flaws in the optical film will cause the quality of the output beam to decline. In severe cases, the entire system will be paralyzed. Damage to the optical film will directly affect the design of the entire system and the performance of future system operations. It is very important to set the coating parameters during the coating production process for optical coating supplier.
Before the coating production, the professional optical coating analysis software Essential Macleod can be used to design the coating process, including the detailed settings of the coating machine, the material source and fixture factors, and the monitoring system. Users can also use the run-order generator to monitor and plan the coating design for a given machine configuration. TFCalc Reoptimize can be online with the coating machine to timely compensate the tolerances of the previous coating film to ensure the performance of the final finished film.
The universal tool for optical film design and analysis is TFCalc software, which can be used to design various types of film systems. Supports film construction for various film systems, and simulates various types of light, such as cone beams, random radiation beams, etc. It can analyze not only the reflectance, transmittance, absorption, and ellipsometry parameters, but also the film reflection and transmission color analysis. It integrates various analysis functions and can be used with other software such as Matlab to support Analysis of membrane performance.
TFCalc software is a leader in providing innovative methods in membrane design software. For example, TFCalc allows the refractive index of the active material to change with external influences, a feature not found in other commercial software.
High Reflective Coating
Because optical film is a highly specialized technology, for users, they prefer design software to be easy to use, especially for engineers who only use the software occasionally. TFCalc software package contains A large number of design examples provide user learning. The interface of TFCalc is very user-friendly, using standard windows and Mac programs; film design engineers use menus, dialog boxes, and windows to enter and display results. So TFCalc is already the most widely used software among optical film design engineers.