A method for measuring optical constants of glass
An optical constant and glass technology, applied in the measurement of phase influence characteristics, color/spectral characteristics, etc., can solve the problems of complicated operation of test instruments and inaccurate measurement results, and avoid instrument operation and data processing process, accurate optical constants , Reduce the effect of equipment purchase
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Embodiment 1
[0064] This embodiment provides a method for measuring optical constants, the specific process is as follows image 3 As shown, it includes the following steps:
[0065] 1. Measure the transmission spectrum of the glass sample in a predetermined wavelength range.
[0066] This step mainly uses a spectrophotometer to measure the transmission spectrum (light transmittance) of the glass sample in the 300-2500 nm band.
[0067] In order to distinguish it from the later calculated transmission spectrum, the transmission spectrum in this step is recorded as the measured transmission spectrum.
[0068] 2. Establish a composite oscillator model; the composite oscillator model shows the relationship between the dielectric constant of the glass sample material and the wavelength.
[0069] In this step, the composite oscillator model (with the Gaussian oscillator and polar oscillator as the core) embodies the dielectric constant properties of the glass material. The essence of the com...
Embodiment 2
[0113] The optical constants of two batches of architectural float glass samples were measured by the method in Example 1, and comparative analysis was carried out to illustrate the significance of the method for measuring and analyzing glass optical constants provided by Example 1 of the present invention in actual production . The glass samples used in this example had a thickness of 5.86 mm.
[0114] Figure 6 It is the measured transmission spectrum data obtained by measuring two batches of glass samples (the sample numbers are glass A and glass B) using a spectrophotometer.
[0115] The glass sample A and glass sample B are searched for the optimal value of the genetic algorithm, and the same oscillator model parameter settings and genetic algorithm parameters are used for measurement and analysis. Among them, the parameters of the genetic algorithm are set as follows: the population size is 35 individuals, the genetic iteration is 40 times, the number of elites is 8, t...
Embodiment 3
[0123] Utilize the two batches of glass that embodiment 2 analyzes as substrate, adopt the coated product of identical coating process condition to produce, product glass surface reflection spectrum is as follows Figure 14 , it can be seen from the figure that the difference in the optical constants of the glass leads to the difference in the optical properties of the final coating product between the two. Therefore, the analysis and determination of the optical constant of the glass substrate is the basis for carrying out the design of the film system and controlling the consistent performance of the corresponding coating product batches ; Combined with the schematic diagram of light wave propagation shown in Figure 1, due to the high extinction coefficient of the glass B sample in the near-infrared band, resulting in more light absorption in the process of multiple reflections, the light intensity of R2, R3, etc. is reduced, so that the glass surface reflection in the The ne...
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