| 摘要 |
A polarizing arrangement comprises a first linear polarizer having a first extinction axis. The polarization contrast ratio of the first polarizer is dependent on the angle a light beam incident on the polarizer makes with the extinction axis, polarization being most efficient when the light beam is orthogonal to the first extinction axis. In order to improve the polarization contrast ratio, for light beams traveling in directions which make an angle with the first extinction axis of the first polarizer the polarizing arrangement comprises a second polarizer having a second extinction axis. The first and second polarizer are arranged relative to one another such that, in operation, a light beam traversing the first polarizer in a direction orthogonal to the first extinction axis traverses the second polarizer in a direction coincident with the second extinction axis. The second polarizer has a similar angular-dependent polarization contrast ratio which due the specific arrangement of the first extinction axis with respect to the second extinction axis compensates the reduction of polarization contrast ratio for the first polarizer for light beams which make an angle with the first extinction axis.
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