Projection apparatus and interface apparatus

An interface apparatus comprising:

• a projection apparatus including a light source that emits laser beams of a plurality of colors collimated by a plurality of collimating lenses corresponding to each of the laser beams of the plurality of colors, a light modulator that has a phase-modulation-type modulation element including a display surface which includes a plurality of display regions allocated to each color of the laser beams of the plurality of colors emitted from the light source and modulates each of the laser beams of the plurality of colors on each of the plurality of display regions allocated to each color, a light remover that removes unnecessary components, which are generated by the modulation of laser beams of other colors mixed in the plurality of display regions allocated to the laser beams of the plurality of colors, from each of the laser beams of the plurality of colors modulated by the light modulator using wavelength selection;
• and a projector that projects light from which the unnecessary components have been removed by the light remover,
• a camera that captures a region including an image projected by the projection apparatus;
• and
• a controller configured to include a memory and a central processing unit, the controller providing image information corresponding to an operation performed for the image in the region captured by the camera to the projection apparatus and controlling the projection apparatus such that the image information is projected, wherein
• the light source emits each of the laser beams of the plurality of colors to each of the plurality of display regions allocated to each color,
• the light modulator modulates each of the laser beams of the plurality of colors on each of the plurality of display regions allocated to each color, and
• the light remover is arranged between the light modulator and the projector, and removes the unnecessary components protruded from each of the plurality of display regions to adjacent display regions.