Polarisator

Der Polarisator wurde heute geliefert

The polarizer was delivered today

Keine Restspannung erlaubt, d.h. keine inhomogene Materialverfärbung unter dem Polarisator erlaubt

Allows no residual voltage, i.e. no inhomogeneous material discoloration under the polarizer allows

Optische Vorrichtungen mit hochwertigem Polarisator

Optical devices comprising high performance polarizer package

Dies führt zur Erzeugung von Farbeffekten, die nur unter dem Polarisator sichtbar sind.

That leads to the production of color effects which are visible only under the polarizer.

Der Polarisator soll insbesondere dazu geeignet sein, aus einfallendem zirkular oder linear polarisierten Licht austretendes Licht mit zylindersymmetrischer Verteilung der Polarisationsvorzugsrichtungen zu erzeugen. Zur Lösung dieser Aufgabe schlägt die Erfindung einen Polarisator mit den Merkmalen von Anspruch 1 vor.

As a solution to those and other objects, the invention, according to one formulation, provides a polarizer for transforming a light beam incident along an optical axis into an exiting light beam that has a prescribed distribution of locally varying polarization states over its cross-section, the polarizer comprising the following characteristics: at least one birefringent element having a crystal axis and a finite axial thickness for generating a phase shift between mutually orthogonally polarized field components of transmitted light; the illuminated cross-section of said polarizer is subdivided into numerous zones; at least one of said zones is configured such that its transmission direction for light is inclined with respect to said crystal axis of said zone within said zone at an inclination angle greater than 0° and less than 90° and lies in a transmission plane defined by said transmission direction and said crystal axis; wherein the axial thickness of said zone and the inclination angle are adapted such that a difference in the optical path lengths of said field components within said zone corresponds to a prescribed relative retardation upon exiting said polarizer and the orientation of the transmission plane of every such zone is prealigned such that the desired, local, preferred polarization directions exist within that zone.

Gast/Wirt-Polarisator nach Anspruch 4, wobei das Flüssigkristallmaterial einen nematischen Flüssigkristall aufweist.

The guest-host polarizer of claim 4, wherein the liquid crystalline material comprises a nematic liquid crystal.

Polarisator vom Typ eines doppelbrechenden Beugungsgitters.

Birefringence diffraction grating type polarizer.

Polarisator nach Anspruch 27, worin eine Dicke mindestens einer doppelbrechenden anisotrop absorbierenden Schicht die Bedingung der Erzielung, bei Ausgang aus dem Polarisator, des lnterferenz-Minimums für eine linear polarisierte Lichtkomponente und des lnterferenz-Maximums für die andere orthogonal linear polarisierte Lichtkomponente erfüllt.

The polarizer according to claim 27, wherein a thickness of at least one birefringent anisotropically absorbing layer satisfies the condition of obtaining, at output of the polarizer, the interference minimum for one linearly-polarized light component and the interference maximum for the other orthogonal linearly-polarized light component.