Folded stereoscope

DETAILED DESCRIPTION What is claimed is: 1.
A folded stereoscope which comprises a relatively rigid sheet generally in the form of a rectangle provided with a cut away portion cut from one side edge of the rectangle, the sheet comprising an upper flap portion provided with two apertures spaced at a distance substantially equal to the distance between human eyes, each of said apertures being provided with a removable lens, a first lower flap portion connected to said flap portion through a first fold line and a second lower flap portion connected to said first lower flap portion through a second fold line and separated from said upper flap portion by said cut away portion.
2.
A folded stereoscope as defined in claim 1 wherein said sheet further includes a top flap portion connected to said upper flap portion through a third fold line, said top flap portion being provided with a cut-out adapted to frictionally and resiliently clamp the edge of said second lower flap portion in the assembled state.
3.
A folded stereoscope as defined in claim 1 wherein said cut away portion includes a central enlarged portion adapted to accommodate the viewer nose.
4.
A folded stereoscope as defined in claim 1 wherein said first lower flap portion includes a fourth fold line extending laterally from the bottom edge of said cut away portion toward one side edge of the sheet.
5.
A folded stereoscope as defined in claim 1 wherein said aperture is shaped to allow the lens to laterally move within the aperture 6.
A folded stereoscope which comprises a first sheet provided with two apertures spaced from each other at a distance substantially equal to the distance between human eyes, each of said apertures being provided with a removable lens, a second sheet folded from said first sheet at substantially right angles at a first fold line, a third sheet folded from said second sheet at substantially right angles at a second fold line and perpendicular to said first sheet and a fourth sheet folded from said first sheet at substantially right angles at a third fold line and parallel to said second sheet, said fourth sheet being provided with a cut-out for frictionally and resiliently clamping the edge of said third sheet