More reliable monochromatic stereoscopic image projector

Displaying system including means for generating stereoscopic images of a preset object, a device for displaying said stereoscopic images including a stereoscopic image projector and a semi-transparent screen and a pair of stereoscopic glasses, the means for generating stereoscopic images, the displaying device, the semi-transparent screen and the pair of stereoscopic glasses being arranged so that the stereoscopic image of the preset object appears, through the stereoscopic glasses, at a preset distance from the semi-transparent screen, wherein

• the stereoscopic image projector comprises a monochromatic stereoscopic image projector including a first light source, a second light source, a first imager and a second imager, the radiation of the two light sources having the same spectral distribution centred on a central wavelength, the first imager and the second imager being connected to a generator of stereoscopic image pairs, each pair comprising what is called a “left” image and what is called a “right” image;
• wherein:
• the image projector includes a dichroic separating filter that transmits the portion of the spectrum emitted by the light sources below the central wavelength and that reflects the portion of the spectrum emitted by the light sources above the central wavelength, or vice versa;
• the first light source and the second light source are arranged symmetrically on either side of the dichroic separating filter and are arranged so as to illuminate the first and the second imager;
• the image projector operates cyclically, each cycle including two alternations,
• in the first alternation, the image generator emits a first pair of stereoscopic images including a first left image and a first right image, the first left image being displayed by the first display and the first right image being displayed by the second display, the first light source is activated and the second light source is turned off,
• in the second alternation, the image generator emits a second pair of stereoscopic images including a second left image and a second right image, the second left image being displayed by the second display and the second right image being displayed by the first display, the first light source is turned off and the second light source is activated,
• the pair of glasses includes a first filter placed in front of the right eye and a second filter placed in front of the left eye, the first filter transmitting all of the spectrum except for the portion of the spectrum emitted by the light sources below the central wave wavelength and the second filter transmitting all of the spectrum except for the portion of the spectrum emitted by the light sources above the central wave wavelength.