Apparatus and method for estimating a phase retarder and method of manufacturing the phase retarder using the same

A method for estimating a phase retarder by using an apparatus for estimating a phase retarder, which is equipped with a polarization element, a polarization image acquisition module having a plurality of polarized pixels, and a processor, the method comprising:

• outputting, by the polarization element, an incident light as a linear polarization and making the linear polarization incident onto a phase retarder to be tested;
• receiving, by the polarization image acquisition module, an emitting light, which is output from the phase retarder on which the linear polarization is incident, in a plurality of polarized pixels and obtaining a polarization image of the phase retarder based on the emitting light that is modulated in the polarized pixels;
• and
• evaluating, by the processor, quality of the phase retarder based on uniformity of a brightness value between polarized pixels of the polarization image, wherein the polarized pixels modulate the emitting light based on a plurality of transmission angles and detect the modulated emitting light.

A method for manufacturing a phase retarder by using an apparatus for estimating a phase retarder, which is equipped with a polarization element, a polarization image acquisition module having a plurality of polarized pixels, and a processor, the method comprising:

• outputting, by the polarization element, an incident light as a linear polarization and making the linear polarization incident onto a phase retarder sample;
• receiving, by the polarization image acquisition module, an emitting light, which is output from the phase retarder sample on which the linear polarization is incident, in a plurality of polarized pixels and obtaining a polarization image of the phase retarder sample based on the emitting light that is modulated in the polarized pixels;
• evaluating, by the processor, quality of the phase retarder sample based on uniformity of a brightness value between polarized pixels of the polarization image;
• transmitting, by the processor, a fair quality message to a phase retarder manufacturing device in response to the phase retarder sample being evaluated to have fair quality, in order to apply a manufacturing processing condition of the sample in the phase retarder manufacturing device;
• and
• transmitting, by the processor, a poor quality message to the phase retarder manufacturing device in response to the phase retarder sample being evaluated to have poor quality, in order to modify the manufacturing processing condition of the sample in the phase retarder manufacturing device,
• wherein the polarized pixels modulate the emitting light based on a plurality of transmission angles and detect the modulated emitting light.