Wire grid polarizer test : (2) results with titling effects included : (3) results with a protective glass (blank) Jinseok Ko and Steve Scott DNB Meeting June 20, 2005 last time uwg test setup rotational polarizer detector (unpolarized) collimated LED wire grid polarizer wire side glass side ugw test setup rotational polarizer detector (unpolarized) collimated LED wire grid polarizer glass side wire side with various reference transmission axes (rta) 00 90 180 For various reference transmission axis between 0 to 180 (0 , 1 , 5 , 10 , , 89 , 90 , 91 , 170 , 180 ) now, we want to simulate the same configuration as in the vessel 5 MSE object lens wire grid polarizer with two possible directions protective glass (blank) light source (DNB line) new test setups ubwg setup rotational polarizer detector (unpolarized) collimated LED wire grid polarizer ubgw setup rotational polarizer detector (unpolarized) collimated LED wire grid polarizer protective glass (blank) uwg setup rotational polarizer detector (unpolarized) collimated LED wire grid polarizer wire side glass side ugw setup rotational polarizer detector (unpolarized) collimated LED wire grid polarizer glass side wire side vertical tilting effect +1.5 , 3.5 , 5.0 -1.5 , 3.5 , 5.0 uwg & ugw (reference cases) : shows w/g position difference ugw & ugw051p & ubgw051p : shows blank and tilting effects uwg & ubwg051p : also shows blank and tilting effects explicit tilting effect is observed in the linear behavior However, inclusion of tilting and blank effect does not explain the observation in the vessel Invessel observation 3 degrees variation The protective glass (blank) between the light source and the wire-grid polarizer does not affect the measured polarization angle much in either cases (wg or gw).. Tilting affects the linear behavior that exists in the measured polarization angle variation along the angles of incidents. Inverse-matching phenomenon (that is, uwg data more match acgw (or agw) predictions and ugw more to aw predictions) still not resolved. Even including tilting and blank effects does not explain the observation from the from the invessel polarizer test. observations next Same tests with a dichroic (plastic) polarization sheet Develop analytic predictions that include the tilting effects, the additional polarization changes due to glass substrate and/or AR coating layer air analytic predictions were as following and only involves possible changes in angles of incidents airglasscoatingaircoatingglass aircoatingairglass agcwacgw acwagw aw wire grid these predictions match with the data for parabolic coefficients but not for linear coefficients u b w g 5.1p configuration u b g w 5.1p configuration new prediction that includes the tilting effects x y z y` z` (mse_memo_49b) u b g w 5.1p configuration with new prediction The protective glass (blank) between the light source and the wire-grid polarizer does not affect the measured polarization angle much in either cases (wg or gw).. Tilting affects the linear behavior that exists in the measured polarization angle variation along the angles of incidents. New prediction with tilting effects, although not for all reference transmission axes, implies this. Inverse-matching phenomenon (that is, uwg data more match acgw (or agw) predictions and ugw more to aw predictions) still not resolved. (Most seriously,) none of the measured data (or configuration) resembles the profile from the invessel polarizer test done with the LED light source. observations next Same tests with a dichroic (plastic) polarization sheet Develop more rigorous predictions that include the additional polarization changes due to glass substrate and/or AR coating layer