Abstract: A display device is disclosed which comprisees a plurality of positive lenses disposed in a concavely curved lens array as seen by an observer and a plurality of substantially concavely curved pictures respectively associated with the lenses. Each of the pictures is disposed behind the respective lens and is located substantially at or within the focal length of the respective lens. The pictures each comprise a plurality of picture elements such that, when the lens array is viewed from different angles by an observer, the observer is able to perceive a composite image formed from magnified images of the picture elements of different ones of the pictures.

Abstract: There is disclosed a unique tamperproof security card comprised of a transparent upper layer having narrow parallel lenses on the outer surface, and an image containing substrate, said two layers forming a lenticular system by which images on the substrate are selectively visible depending upon the angle from which the card is viewed. By incorporating into a selectively visible image the information necessary to verify the identify of the cardholder, e.g. the cardholder's photograph or signature, the card may be rendered substantially tamperproof.

Abstract: The present invention relates to stereophotography for a cylindrical all around stereophotograph, lenticular cylindrical continuous photography, and associated apparatus. A new type of cylindrical negative film stand is to be used in connection with a new lenticular image formation continuous displacement photographing method. A stereophotograph on which a stereo-image may be sighted at any angle of the object being photographed is obtainable. The method is also capable of use to record a change in scenery on a negative film during a time duration.

Abstract: A lenticular screen display designed for viewing in sunlight which comprises an array of parallel, horizontally arranged cylindrical lenticules with a sequence of animated images on a section located in the top portion of the focal plane of the lenticules, and means for preventing the sun's rays from focusing on the focal plane of the lenticules so as to prevent burning the image bearing sections. The means for preventing the sun's rays from focusing on the image bearing section can be diffusers or reflectors located in the lenticule at the appropriate position. Another means is to alter the focal length of the lower portion of the lenticules so it is either less or greater than the focal length of the top portion. A further means is to make the top portion of the front surface of the lenticule flat.

Abstract: An improved roadway sign comprising a light retroreflective indicia region and colored retroreflective background region is provided. The retroreflective properties of the regions are selected such that the ratio of the retroreflective brightness of the indicia to that of the background is substantially larger at observation locations within the legibility zone for the sign, than the ratio is at observation locations outside the legibility zone. The sign is conspicuous by virtue of the bright retroreflection and distinctive color of the background outside the legibility zone, yet is legible because of the increased contrast ratio of the indicia to the background in the legibility zone.

Abstract: The light incident upon a lenticular parallax panoramagram variable aspect display is imaged upon the object field and then distributed in part across portions of the object field outside the images. Adjustment is made for the rate at which the display changes as a function both of the rate of movement of the viewer past the display, and of the instantaneous absolute angular position of the viewer with respect thereto. Adjustments can also be made for parallax, lens circular aberration at off-center viewing angles, differential thermal expansions within the sign, and display changes due to changes in ambient conditions. Each lens element is preferably provided with its own exclusive object field.

Abstract: The present invention relates to a novel and unique activated work such as a child's book or a greeting card having at least two turnable pages in juxtaposed relationship and which is formed having a portion thereof that is essentially invisible in a first state but visible in a second state. Electrical signals are coupled to the second portion for selectively and reversibly changing the second portion from the invisible to the visible state when the pages are moved from their juxtaposed relationship.

Abstract: A picture display panel is provided having an envelope with internal reinforcement partitions formed onto a display window. The display window is provided with substantially V-shaped grooves on the outside opposite to contact surfaces with the reinforcement partitions. The reinforcement partitions thus become substantially invisible from the outside. The outermost edges of these V-shaped grooves are preferably rounded, and the picture display window surface between juxtaposed grooves may be convexly curved into cylindrical lenses to make the reinforcement partitions even more invisible.

Abstract: The light incident upon a lenticular parallax panoramagram variable aspect display is imaged upon the object field and then distributed in part across portions of the object field outside the images. Adjustment is made for the rate at which the display changes as a function both of the rate of movement of the viewer past the display, and of the instantaneous absolute angular position of the viewer with respect thereto. Adjustments can also be made for parallax, lens circular aberration at off-center viewing angles, differential thermal expansions within the sign, and display changes due to changes in ambient conditions. Each lens element is preferably provided with its own exclusive object field.

Abstract: A lenticular device is disclosed having a lens array with one or more lenticular convex ridges joined by cusped or concave valleys forming lens elements on one of its surfaces. In addition, the lenticular array is uniformly separated from a message transmitting surface by an air space directly related to a field of view of no more than 30.degree. determined by the converging light rays at the focal point. The carrier sheet or message is a plurality of messages resolved from a series of linear segments in the form of binary lineations placed in focus relative to the lens array. By establishing a proportional relationship between lens aperture and focal length, the rate of message change is predetermined for any prescribed viewing situation. Surface interference caused by reflection, chromatic diffraction, and other light loss is controlled by the relationship of optical design, and optical quality, coupled with other structural elements.

Abstract: A verification device has a transparent sheet including parallel rows of lenticules and rows of colored lines in registration therewith. Verification is accomplished by observing optical effects presented by patterns of irregularly positioned rows of lenticules and corresponding colored lines viewed against a surrounding background area of regularly positioned rows of lenticules and corresponding colored lines.

Abstract: A unit (10) for disinfecting contact lenses includes a housing, heating means (20) arranged to heat a contact lens case (21) and the contact lenses therein and means (30) for indicating the temperature condition (HOT or COLD) of the lens case. The temperature indicating means includes a viewing window (17) formed in the housing, a prismatic lens (38) within the housing and behind the viewing window, and pivotally mounted indicia (39) behind the prismatic lens that indicates if the lens case is cool enough to handle following the disinfecting heating cycle.

Abstract: A supporting frame with a handle has a transparent supporting plate mounted therein. The plate supports a thin transparency over the exposed surface of the plate. The transparency has a multiplicity of demagnifying fresnel lenses formed therein in abutting relation and in vertical and horizontal rows. The lens areas are rectangular in outline with very fine and closely spaced concentric light refracting grooves formed in one surface of the transparency and extending to the edges of the several areas. The frame has retaining shoulders therearound for removably holding one of several different opaque silhouette cards of different household furnishing articles, which are provided, along one edge of the frame.

Abstract: Display apparatus including a display surface containing advertising and/or other informative or decorative matter and having at least portions thereof slotted or transparent. Diffraction grating means are positioned to the rearward side of the display surface and means are provided for illuminating the diffraction grating in order to create a color spectrum effect which is projected through the aforesaid transparent openings or slots, creating a highly aesthetically-pleasing effect, the distribution of the colors being changed with changes in position of the viewer. The openings may preferably be in the form of symbol or a composite thereof. The opaque regions of the display surface may, in one preferred embodiment, be reflective.