ʻO ka pali neʻe, kahi i kapa ʻia ʻo ia he retarder phase, kahi ʻano hana e hoʻololi ai i ke kūlana polarization o ke kukui ma ka hana ʻana i kahi ala ʻokoʻa optical (a i ʻole ke ʻano neʻe) i waena o ʻelua mau pālua polarization ʻelua. Ke kū ka mālamalama a me ka hanana a me nā ʻano like ʻole o ka ʻenehana, ʻokoʻa ka ʻōkuhi o ke ala, a he laina polarized light, elliptically polarized light, ka ʻāpana polarized light, a me nā mea'ē aʻe ma kekahi mau wa gelombang, e ʻike ʻia ka ʻokoʻa e ke anuanu o ka papa kii.

Kūkā ʻia nā papa pelekane me nā mea birefringent me ka mānoanoa pololei e like me ka quartz, calcite a mika paha, kona kūlike axical i ka wafer. Hoʻokumu ʻia nā papa pālua (e pili ana i ka pahu λ / 2 a me plates / 4 nalu.) E paʻa ana i ka lewa mokulele e hiki ai i ko lākou hoʻohana no nā noi mana kiʻekiʻe me nā pōkoki hōʻino ma luna o 10 J / cm² no nā pulima 20 ns ma 1064 nm.

Half (λ / 2) Pōhaku Wave

Ma hope o ka hoʻolilo ʻana i ka pā o ka pahu λ / 2, ke aniani la ka lula polarzed a i ka lula, akā naʻe, aia ka ʻokoʻa (2θ) ma waena o ka piʻi o ka lulu hoʻohui a me ka lele ʻana o ka lele o ka hanana i hoʻomālamalama ʻia. Inā θ = 45 °, p perp pulu ka pulu uila o ka puka i waho e p to ana me ka p ation pulu uila o ka hanana, ʻo ia ka when = 45 °, hiki i ka nalu hawewe λ / 2 ke loli i ka moku polarization ma 90 °.

Quarter (λ / 4) Pahu Wave

I ka manawa o ke kihi ma waena o ka lulu ʻana o ka uwila hōʻaii i ka pōʻai polarized a me ke kiko o ka optical o ka pā i ka pahu θ = 45 °, hele ka mālamalama ma waena o ka pahu plate / 4 a me ka lula. Inā ʻaʻole, ma hope o ke kahe ʻana i ka pā pahu λ / 4, he kukui polarized e hiki ke polarized linearly. I like ka hopena o ka pulu λ / 4 me ka pulu λ / 2 ke hiki i ka kukui ke hele i ʻelua.

Nā Pāʻani WISOPTIC - Nā Pihi Wave