Patent ID: 7796329

Claim:
A sighting device for coupling a sight mark into a viewing beam path, the sighting device comprising: an optical component defining a region at least partially transmissive for a viewing beam traveling along said viewing beam path; a source for providing said sight mark as a sight mark beam; said optical component having a first optical coupling element coupling said sight mark into said optical component; said optical component having a second optical coupling element configured as a diffractive structure and being disposed in said region of said viewing beam path for coupling said sight mark out of said optical component and into said viewing beam path; said optical component being totally reflective for guiding said sight mark beam in the interior of said optical component; said source being configured as a light source or an image source; said first optical coupling element being configured as a diffractive structure or a mirror; a collimator lens disposed between said source and said first optical coupling element; a pupil plane being disposed between said optical component and said collimator lens; and, a diffractive sinusoidal structure disposed in said pupil plane and said diffractive sinusoidal structure having a sinusoidally-shaped surface structure applied thereto in order to make possible at least a first order diffraction and a minus first order diffraction in addition to a zero order diffraction for generating three dot-shaped sight marks.