Optical arrangements for head mounted displays

A system for channeling a displayed image, said system comprising:

• a display that projects an image along an optical path;
• a lens that focuses the image;
• a splitter in proximity to the a focal point of said image for creating a plurality of display sub-images, each said sub-image following one of a plurality of optical sub-paths;
• eye-optics placed along said at least one optical sub-path;
• and
• means for forming a real-image arranged along said at least one optical sub-paths, arranged between said splitter and said eye-optics, and wherein a movement of said forming means maintains a constant length for said optical sub-path.

A method of maintaining a constant optical path length, said method comprising:

• generating a sub-image that follows an optical path through eye-optics to an eye of a user;
• arranging an optical element along said optical path before said eye-optics;
• and
• linking a movement of said optical element with a movement of said eye-optics, wherein said optical element movement counteracts said eye-optics movement thereby maintaining said constant length of said optical path.

A head mounted display, said display comprising:

• a first optical path;
• a first diffuser placed in said first optical path forming a first real image;
• a first eye-optics transmitting said first real image to a first eye of a user;
• a first optical element placed in said first optical path reflecting said first real image into said first eye-optics;
• and
• first gearing means for linking movement of said first optical element and said first eye-optics;
• wherein said linked movements accommodate an interpupilar distance of a user while maintaining a constant length for said first optical path.