A security device includes an array of lenses and a plurality of first and second segments disposed under the array of lenses. At a first viewing angle, the array of lenses presents a first image for viewing without presenting the second image for viewing, and at a second viewing angle different from the first viewing angle, the array of lenses presents for viewing the second image without presenting the first image for viewing. At least one first or second segment can include one or more microstructures or one or more nanostructures configured to produce one or more colors for the first or second image.

A method for manufacturing a synthetic image device includes providing of a focusing element array. An image layer is arranged in a vicinity of a focal distance of focusing elements of the focusing element array, whereby a synthetic image composed of enlarged portions of the image layer becomes perceivable for a viewer. The image layer includes an array of image cells, each being associated with a respective focusing element and wherein the array of image cells has a same symmetry and element distance as the focusing element array. The arranging includes creating continuous image objects within the image cells such that synthetic images to be viewed, all having contributions from one of the continuous image objects, present smooth successive non-parallax alterations upon changing a viewing direction. This creation is performed according to an array of digital image cells of a digital image layer model.

A method for manufacturing a synthetic image device includes providing of a focusing element array. An image layer is arranged in a vicinity of a focal distance of focusing elements of the focusing element array, whereby a synthetic image composed of enlarged portions of the image layer becomes perceivable for a viewer. The image layer includes an array of image cells, each being associated with a respective focusing element and wherein the array of image cells has a same symmetry and element distance as the focusing element array. The arranging includes creating continuous image objects within the image cells such that synthetic images to be viewed, all having contributions from one of the continuous image objects, present smooth successive non-parallax alterations upon changing a viewing direction. This creation is performed according to an array of digital image cells of a digital image layer model.

The present invention provides a marker capable of reducing noises other than a detection target image. The marker (100) of the present invention includes a lens main body (101) that includes multiple lens units (102) and a substrate (106). The lens units (102) are arranged successively in a planar direction. The lens main body (101) has lens portions (103) on one surface side and has multiple detectable portions (105) that can be detected from the one surface side on the other surface side. The lens main body (101) is arranged on the substrate (106). The marker (100) further includes a non-scattering layer (108) between a surface of the substrate (106) on the lens main body (101) side and a surface of the lens main body (101) on the substrate (106) side.

An image display device is capable of easily adjusting a diopter scale with respect to a virtual image. The image display device includes an image generating unit that emits image light including image information, a first optical system that forms an intermediate image by condensing the image light, a second optical system that guides a virtual image to eyes of a viewer by deflecting the light from the intermediate image, and guides the light to the eyes of the viewer by transmitting external light, and an intermediate image position changing device that adjusts a position of the virtual image in depth direction by changing a position of the intermediate image.

An image display device is capable of easily adjusting a diopter scale with respect to a virtual image. The image display device includes an image generating unit that emits image light including image information, a first optical system that forms an intermediate image by condensing the image light, a second optical system that guides a virtual image to eyes of a viewer by deflecting the light from the intermediate image, and guides the light to the eyes of the viewer by transmitting external light, and an intermediate image position changing device that adjusts a position of the virtual image in depth direction by changing a position of the intermediate image.

A multiple-image display body includes a spacer layer, a line tone barrier layer stacked on the first surface of the spacer layer, and a multiple-image formation layer stacked on the second surface of the spacer layer. The line tone barrier layer includes first regions, which transmit electromagnetic waves, and second regions, which absorb electromagnetic waves. The multiple-image formation layer includes images that are visible when observed from specific angles over the first regions of the line tone barrier. The image is formed by a contrast resulting from an area ratio of the third region, which scatters electromagnetic waves, and the fourth region, which absorbs electromagnetic waves.

A multiple-image display body includes a spacer layer, a line tone barrier layer stacked on the first surface of the spacer layer, and a multiple-image formation layer stacked on the second surface of the spacer layer. The line tone barrier layer includes first regions, which transmit electromagnetic waves, and second regions, which absorb electromagnetic waves. The multiple-image formation layer includes images that are visible when observed from specific angles over the first regions of the line tone barrier. The image is formed by a contrast resulting from an area ratio of the third region, which scatters electromagnetic waves, and the fourth region, which absorbs electromagnetic waves.

The invention provides a display system which incorporates two display devices. A first is larger than a second, but with a lower resolution. The higher resolution second display is a directional display and it has its output area within the overall output area of the first display. This system integrates a general display for long range viewing by multiple people with a short range higher resolution display for interaction with one or a small number of users.

A number of illustrative variations may include a method of relative localization via the use of simultaneous location and mapping gear sets.