Generally, a waveplate has a bigger phase difference change by incidence angle change, so that the wavelength to be used becomes short.
In DUV and VUV region, it has very large dependence of incidence angle.
The Wide Field Angle Waveplate is a optical element which solves the above-mentioned problem.
A basic structure of the Wide Field Angle waveleplate consists of a "wavelplate" and a "compensating plate" which compensates only incidence angle dependence, as shown in a figure.
Although the "waveplate" is usually manufactured with a zero order double plate, it can be manufactured also with a multi-order waveplate.
The Wide Field angle Waveplate is assembled as one element combining the "waveplate" and the "compensating plate."
It is possible to assembly of each crystal plates by optical contact or an air-space.
When using weak intensity light, an optical contact type is recommended.
This Product is avail to ＶＩＳ～IR region light not only UV region light.
Retardation
Schematic diagram of VUV, DUV Wide Field Angle Waveplate
