| CPC G02B 27/286 (2013.01) [G02B 5/3016 (2013.01); G02B 27/288 (2013.01); H04N 23/54 (2023.01); H04N 23/55 (2023.01)] | 10 Claims |
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1. An automatic polarization control device, the device comprising:
a first liquid crystal for polarizing a penetrated polarization component according to an applied voltage by rotating at a predetermined angle;
a polarization controller for controlling a voltage applied to the first liquid crystal a first polarizing filter provided at a rear of the first liquid crystal so as to fix a penetrated polarization direction and penetrating incident light polarized in the penetrated polarization direction;
an image sensor provided at a rear of the first polarizing filter and imaging the penetrated light passing through the first liquid crystal and the first polarizing filter;
a processor performing image processing for the penetrated light imaged by the image sensor;
an image storage for storing an image that is image-processed by the processor;
an image design part for designing an image processing sequence so as to acquire an optimal polarization image according to a purpose of use for the image processing and controlling the polarization controller and the processor according to the designed image processing sequence; and
an image determination part for comparing polarization images of various angles according to a design of the image design part to select the polarization images suitable for the purpose of use for the image processing, or generating an image suitable for the purpose of the image processing based on the polarization images of various angles,
wherein the image determination part generates an image suitable for the purpose of use by applying relative contributions based on polarized images of various angles,
wherein the relative contributions are calculated by making polarized light having a polarization conversion angle of β angle incident, applying a voltage V to the first liquid crystal, putting the polarizing filter in a state of penetrating vertically polarized light, measuring light intensity La with a light sensor, putting the polarizing filter in a state of penetrating horizontally polarized light, measuring light intensity Lb with the light sensor, or
the relative contributions are calculated by making horizontally polarized light incident, applying a voltage Vβ to the first liquid crystal, rotating the polarizing filter at the angle where light intensity of a light sensor is the maximum, measuring an angle from the horizontal to an angle at which the light intensity is the maximum to store as a β angle, measuring the light intensity of the light sensor at the angle where the light intensity is the maximum to store as La , rotating the polarizing filter in a state perpendicular to the angle where the light intensity is the maximum to measure the light intensity of the light sensor and store as Lb , putting the polarizing filter in a state in which the horizontally polarized light is penetrated, measuring light intensity Lb in the light sensor,
wherein, when incident light is incident to the first liquid crystal, a polarization component rotates β degrees and is emitted from the first liquid crystal according to the voltage applied to the first liquid crystal, and as emitted light passes through the first polarizing filter, only a component corresponding to the penetrated polarization direction of the first polarizing filter is emitted, so that the emitted light is imaged by the image sensor.
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