Optical phase analyzing system and optical phase analyzing method

An optical phase measuring device, configured to generate an unprocessed image for phase measurement of a meta lens, comprising:

• a polarizing beam splitter group configured to linearly polarize polarized light and split the polarized light into a reference beam and a measurement beam, wherein the reference beam and the measurement beam have a polarization angle difference of 90 degrees, and the measurement beam passes through the meta lens to undergo measurement, such that a phase analysis beam is formed;
• an interfering polarizer group configured to cause the reference beam and the phase analysis beam to interfere with each other and circularly polarizing the reference beam and the phase analysis beam, such that a circularly polarized beam is formed;
• and
• a polarizing image pickup device configured to receive the circularly polarized beam to generate the unprocessed image, wherein the unprocessed image comprises a first interference image, a second interference image, a third interference image, and a fourth interference image, the first interference image, the second interference image, the third interference image, and the fourth interference image have first interference, second interference, third interference, and fourth interference respectively, and the first interference, the second interference, the third interference, and the fourth interference are different.

An optical phase analyzing method, configured for phase measurement of a meta lens, comprising:

• polarizing polarized light and splitting the polarized light into a reference beam and a measurement beam;
• causing the measurement beam to pass through the meta lens to undergo measurement, and forming a phase analysis beam;
• causing the reference beam and the phase analysis beam to interfere with each other, circularly polarizing the reference beam and the phase analysis beam, and forming a circularly polarized beam;
• receiving the circularly polarized beam, and generating an unprocessed image;
• and
• obtaining the meta lens phase according to the unprocessed image;
• wherein
• the reference beam and the measurement beam have a polarization angle difference of 90 degrees;
• and the unprocessed image comprises a first interference image, a second interference image, a third interference image, and a fourth interference image, the first interference image, the second interference image, the third interference image, and the fourth interference image have first interference, second interference, third interference, and fourth interference respectively, and the first interference, the second interference, the third interference, and the fourth interference are different.