Field-of-view controlling arrangements

A field-of-view controlling arrangement made up of a single lenticular sheet made up of polyhedral lenticular structures having at least two sets of parallel planar surfaces that intersect to define portions of the lenticular structures, and additional surfaces not included in said two sets of parallel planar surfaces,

• wherein at least portions of each said surface in said sets of intersecting parallel planar surfaces are arranged to attenuate light transmitted through the sheet,
• wherein said additional surfaces are transparent, and
• wherein said light-attenuating portions of said at least one if said surfaces in said sets of intersecting parallel planar surfaces thereby defines a privacy zone for images transmitted through the sheet.

A field-of-view controlling arrangement made up of a single lenticular sheet made up of frustoconical lenticular structures having a curved surface and additional surfaces not included in a set of said curved surfaces,

• wherein at least portions of each said curved surface in said set of curved surfaces s arranged to attenuate light transmitted through the sheet,
• wherein said additional surfaces are transparent, and
• wherein said light-attenuating portions of said curved surfaces thereby define a 360° privacy zone for images transmitted through the sheet.

A field-of-view controlling arrangement, comprising:

• a microprism or lenticular sheet including a diffusing agent in at least a portion of the sheet, and surfaces arranged so that light transmitted through the sheet along selected optical paths is attenuated before exiting the sheet through a first set of surfaces while light transmitted along other optical paths is relatively unattenuated before exiting the sheet through a second set of surfaces oriented at a nonzero angle relative to each of the surfaces in the first set of surfaces, thereby achieving a field-of-view controlling arrangement that restricts viewing of an image from more than one side of the potential field-of-view.

A field-of-view controlling arrangement as claimed in claim 33, wherein surfaces in said first set of surfaces define spaced-apart grooves on opposite sides of a microprism or lenticular sheet, and wherein surfaces in said second set of surfaces extend between said grooves.

A field-of-view controlling arrangement, comprising a transparent sheet having a plurality of spaced apart grooves on at least one side of the sheet, wherein each surface of each of said grooves is arranged to attenuate light to thereby define privacy zones on at least two sides of a field-of-view for images transmitted through the sheet.

A field-of-view controlling arrangement suitable for use as a window covering, comprising:

• a microprism or lenticular sheet including surfaces arranged so that light transmitted through the sheet along selected optical paths is attenuated before exiting the sheet through a first set of surfaces while light transmitted along other optical paths is relatively unattenuated before exiting the sheet through a second set of surfaces oriented at a nonzero angle relative to each of the surfaces in first set of surfaces,
• wherein sad second set of surfaces is arranged to expand a scene visible through the window.