BAO RESEARCH

In the next two chapters, we will discuss the relationship among the uniformity of the thickness distribution, the thickness control error and the structure of the coating machine.

This article will analyze the control and application of system errors through two cases. The first case is fabrication of broadband AR coatings based on Kaufman source, and the second case is the fundamental frequency AR coatings commonly used in laser systems. In each case, the film thickness error will be analyzed step by step based on the example spectrum, and the design method to improve the sensitivity of the film system will be exemplified based on the systematic error obtained by the analysis.

The 5um long pass filter is one of the core components of the infrared temperature sensor. This article will describe the design and fabrication of this infrared filter, providing an integrated solution from selection of substrate materials, film materials, to film system design, coating process and equipment configuration.

In the previous chapter, common errors of coatings were explained. Mastering the errors can be used to estimate the effect that thin film design can achieve in actual production. Anti-reflection film is an important part of any optical device, which accounts for more than 50% of the optical film market. This chapter mainly describes how to estimate the spectral characteristics of the AR coating that can be achieved by the film material combination.

With the same spectral requirements, we can often get multiple design solutions, but how to choose the most suitable solution? Pratically, the actual prepared spectrum often deviates from the design. Therefore, it is very important to evaluate the manufacturability of the designed spectrum, by analyzing the thickness error based on the equipment and process.

Following last chapter, this chapter introduces the AF film applied on mobile phone camera lens and its compositions, working principle and manufacturing process.

This chapter briefly introduces various indexes, measurement methods and corelation of coating processes for mobile phone lens coating.

This chapter mainly introduces the typical optimization calculation methods of film design software TFCalc and Macleod, which may help improve the understanding and use of thin film optimization calculations by understanding the different mathematical calculation methods behind these functions.

This Chapter will firstly introduce the working principle of a Fourier transform spectrometer, and then describes some of the key factors affecting measurement performance, along with answers to some common questions.

As mentioned in the previous chapter, no matter what method is used to calculate the optical constants of the thin film or simulate the inversion spectrum, the most fundamental material that affects the solution of the error is the accuracy of the spectral data. To understand the principle and source of measurement error of different