Real-time polarization state and phase measurement method based on pixel polarizing film array
A polarizer array, real-time measurement technology, used in measurement devices, measurement optics, optical radiation measurement, etc., can solve the problems of inability to real-time measurement, high vibration isolation, etc., to overcome the inability to measure dynamic objects, reduce the complexity of use, and overcome Effects that require precise position matching and grayscale correction
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Embodiment 1
[0066] Embodiment 1. Real-time polarization state measurement based on pixel polarizer array
[0067] Figure 5 It is an example of the application of the pixel polarizer array to the measurement of the polarization state. The object to be photographed is a polarizer sample array composed of six square polarizers and a metal disc with a smooth surface, and the background is a rough wall. The materials of the six square polarizers are the same, and the polarizing directions are slightly different. A single image captured by the camera can be divided into four images, namely I(0), I(π / 4), I(π / 2) and I(3π / 4), so that S 0 and DoLP. S 0 Represents what a camera without an integrated pixel polarizer array would look like. DoLP is the degree of linear polarization of the image, which ranges from 0 to 1 (see Figure 5 Medium DoLP color scale), the intensity of the degree of linear polarization is represented by grayscale in the figure, and the higher the grayscale, the higher the...
Embodiment 2
[0068]Embodiment 2. Real-time measurement of phase information of parallel light based on pixel polarizer array
[0069] In this embodiment, to measure the phase of parallel light, the object to be measured is selected as a smooth plane mirror, and its normal is slightly inclined to the incident light. The optical path of this embodiment is as Figure 4 shown, and will not be repeated here.
[0070] Figure 6 It is a schematic diagram of the application of the pixel polarizer array in the embodiment to measure the phase of the plane wave by the phase shift method, Figure 6 The picture (a) is a single-frame interference image collected by a CCD integrated with a pixel polarizer array. The unit pixels of the same transmission polarization direction in the collected pictures are taken out separately, and interpolated and averaged to obtain four pictures with the same resolution. ,Such as Figure 6 Figures (b) to (e) respectively represent the images collected by the CCD when...
Embodiment 3
[0072] Embodiment 3. Real-time measurement of phase information of spherical waves based on pixel polarizer array
[0073] Similarly, the optical path of this embodiment is also as Figure 4 As shown, the difference from the previous embodiments is that the object to be measured in this embodiment is a smooth concave mirror to obtain the spherical wave phase.
[0074] Figure 7 It is a schematic diagram of the application of the pixel polarizer array in the embodiment to measure the phase of the spherical wave by the phase shift method, the Figure 7 The picture (a) is a single-frame interference image collected by a CCD integrated with a pixel polarizer array. The unit pixels of the same transmission polarization direction in the collected image are taken out separately, and interpolated and averaged to obtain four pictures with the same resolution. ,Such as Figure 7 Figures (b) to (e) respectively represent the images collected by the CCD when the transmission polarizati...
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