Polarized light 3D image measuring mechanism and manufacturing method thereof

Abstract

The invention discloses a polarized light 3D image measuring mechanism and a manufacturing method thereof. The polarized light 3D image measuring mechanism comprises an image sensor, a liquid crystalbox and a polarizing film, wherein four kinds of measurement quarter-wave plates and polaroids are combined and manufactured above the image sensor at the same time to perform sensing of the light polarization state, the image sensor can simultaneously acquire and calculate four parameters S0-S3 of Stokes parameters (Stokes parameters) by acquiring a detection picture and can acquire and calculatefour parameters S0-S3 of the Stokes parameters (Stokes parameters) at the same time, wherein S0 = I (0 degree, 0 degree) + I (90 degrees, 0 degree), S1 = I (0 degree, 0 degree)-I(90 degrees, 0 degree), S2 = 2 * I (45, 0 degree)-S0, S3 = 2 * I (45 degrees, pi / 2)-S0, and the light intensity (I) and the light intensity (I) are required by the four groups of parameters and the values are functions ofa quarter-wave plate rotation angle and a polaroid rotation angle and are expressed as I (polaroid rotation angle and quarter-wave plate rotation angle). Therefore, the polarizing film does not needto be rotated in a mechanical mode in the measurement process and the phase delay of the wave plate does not need to be changed, and the same benefit of the combination of the light intensities required by the four groups of parameters S0, S1, S2 and S3 during measurement can be achieved.

Description

Technical field [0001] The present invention is a mechanism and manufacturing method for measuring polarized 3D images, especially a mechanism and manufacturing method that uses a mature panel manufacturing process to replace a complex mechanical structure design. Background technique [0002] Press, light polarization state sensing can be used in 3D sensing, material identification... and other fields; and to measure light polarization state, the conventional measurement methods are as follows figure 1 Shown: Let a light source 11 pass through the refraction or reflection of a test object 12, and then pass through a quarter wave plate 13, a polarizer 14, a light intensity sensor 15 and a voltage sensing device 16, and finally Read the voltage value. Describing the polarization state of polarized light requires four sets of light intensities, namely [S0, S1, S2, S3]. The measurement requires that the optical axes of the quarter wave plate 13 and the polarizer 14 match each other,...

AI Technical Summary

Problems solved by technology

[0003] However, during the measurement process, it is necessary to mechanically rotate the polarizer 14 and change the phase delay of the quarter-wave plate to achieve this combination, resulting in two problems for this structure: 1. It requires a larger mechanical structure

[0004] It can be seen that there are still many deficiencies in the above-mentioned commonly used items, which are not really good designers and need to be improved urgently.

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