Method for simultaneously measuring reflectance, transmittance, scattering loss and absorption loss of high reflection/high transmission optical element

Abstract

The invention relates to a method for simultaneously measuring the reflection, transmission, scattering and absorption of a high reflection / high transmission optical element. The method is based on the optical cavity ring-down technology, and includes the steps of firstly, measuring the ring-down time [tau]0 of an initial optical resonant cavity, then adding a high reflection / high transmission optical element to be measured, measuring the ring-down time [tau]1 of a test optical resonant cavity, and obtaining the reflectance / transmittance of the high reflection / high transmission optical element through calculation; simultaneously measuring ratios of a transmission / reflection light intensity signal and a scattering light intensity signal of the high reflection / high transmission optical element to a transmitted light intensity signal of an output cavity mirror, and obtaining the transmittance / reflectance and scattering loss of the optical element through calibration; and solving for the absorption loss of the optical element with the reflectance, transmittance and scattering loss. The measuring method can not only measure the reflectance, transmittance, scattering loss and absorption loss of the high reflection / high transmission optical element, but also enable high definition two-dimensional imaging of the distribution thereof.

Description

technical field [0001] The invention relates to the technical field for measuring the optical characteristics of high reflection / high transmission optical elements, in particular to a method based on optical cavity ring-down technology capable of measuring the reflectivity, transmittance, scattering loss and absorption loss of high reflection / optical elements Methods. Background technique [0002] High reflection / high transmission optical elements are widely used in high energy laser, gravitational wave detection, laser gyroscope and other technical fields. It is especially important to accurately measure the optical properties of highly reflective and highly transmissive components. [0003] The reflectivity measurement of highly reflective optical components is mainly based on optical cavity ring-down technology (Li Bincheng, Gong Yuan; Review of optical cavity ring-down high reflectivity measurement, "Laser and Optoelectronics Progress", 2010,47:021203). The invention p...

AI Technical Summary

Problems solved by technology

Using different devices to measure the single-point reflectance, transmittance and scattering loss of high reflection / high transmission optical components cannot guarantee that the test is at the same position and the components are in the same state, and the device is complicated, cumbersome and time-consuming laborious

At present, there is no measurement method that can simultaneously measure the reflectance, transmittance, scattering loss and absorption loss of high reflection / high transmission optical elements. Efficiency, scattering loss and absorption loss, and it is necessary to meet the measurement method of two-dimensional scanning imaging

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