PROJECTION DEVICE AND METHOD FOR OPERATING A PROJECTION DEVICE

摘要

A projection device may include at least one first laser device and one second laser device, which is arranged opposite the first laser device. A prism is arranged between the two laser devices, wherein a polarization-dependent mirror device is arranged in the prism in such a manner that the beam of the first laser device is reflected in a direction that extends opposite the direction in which the beam of the second laser device is reflected. The polarization of the beam of the second laser device is then rotated, and the beam is deflected back to the polarization-dependent mirror device. The beam of the second laser device now passes through the mirror device without reflection due to the change in the polarization of the beam of the second laser device, such that two superposed laser beams of different polarization are available at the output of the projection device.

主权项

1. A projection device comprising:
at least one first laser device for emitting a first radiation having a first direction of polarization; and at least one second laser device for emitting a second radiation having the first direction of polarization; wherein the first laser device and the second laser device are arranged opposite one another, wherein the projection device further comprises: a prism arranged between the first laser device and the second laser device and having a first boundary surface facing the first laser device and a second boundary surface facing the second laser device, wherein at least one polarization-dependent mirror device is arranged in the prism and is designed in such a way that radiation having the first direction of polarization (s; p) is reflected after impinging on the polarization-dependent mirror device, wherein the polarization-dependent mirror device is arranged between the first laser device and the second laser device in such a way that the first radiation and the second radiation run oppositely to one another after reflection at the polarization-dependent mirror device; at least one polarization modification device wherein the polarization modification device is designed to modify the direction of polarization of radiation in such a way that it passes through the polarization-dependent mirror device without reflection; and at least one further mirror device; wherein the polarization modification device and the further mirror device are arranged in the beam path of the second radiation after a first and before a second impingement on the polarization-dependent mirror device, wherein the first boundary surface of the prism forms a predefinable angle not equal to 90° with the optical axis of the first laser device and the second boundary surface of the prism runs parallel to the first boundary surface.