Abstract:
A method for production of the identification medium is provided, in which a counterfeit product having similar appearance as that of an authentic one can be easily detected and in which the code can be read with high accuracy. The method for production of an identification medium, contains a forming step in which a code printed pattern 107 is formed by printing; and a joining step in which the code printed pattern 107 and a cholesteric liquid crystal layer 102 are joined; wherein the identification medium comprises, in order, seen from an observing side: a cholesteric liquid crystal layer 102, in which a hologram is processed and right circularly polarized light is reflected; a circularly polarizing filter layer 106 having a structure formed by laminating a »/4 plate and a linearly polarizing filter from the observing side, in which left circularly polarized light selectively penetrates toward the cholesteric liquid crystal layer 102 when natural light enters from the opposite side to the cholesteric liquid crystal layer side 102; and a code printed pattern 107, in which a two-dimensional codes is formed.
Abstract:
A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. A cholesteric liquid crystal layer 302, having a fine asperity for forming a hologram, is formed on a transparent first substrate 301. A print layer 305 composed of a black ink is formed on a transparent second substrate 304. The substrates are affixed to each other via a bond layer 308, so that a discrimination medium 310 is obtained. In the discrimination medium 310, the display content obtained by the print layer is changed, so that the display content for discrimination can be changed at low cost.
Abstract:
An identification medium is to be observed via a linearly polarizing filter and includes a first liquid crystal layer that changes the wavelength of light according to the rotational angle of the linearly polarizing filter, a cholesteric liquid crystal layer, and a light absorbing layer that is provided below the cholesteric liquid crystal layer.
Abstract:
A transparent plastic container which is transparent, allows good design and can housed for an anticounterfeit system that determines authenticity by visual check with the use of polarization property. A transparent plastic sheet of a polystyrene-based resin having a total light transmission of 85% or higher and a haze of 7% or less is subjected to vacuum, pneumatic or vacuum/pneumatic forming at a sheet temperature ranging from a glass transition temperature plus 50 degrees C. to a glass transition temperature plus 130 degrees C., thereby obtaining a transparent plastic container having a planar portion with a strain amount of 150 nm or less.
Abstract:
A method for production of the identification medium is provided, in which a counterfeit product having similar appearance as that of an authentic one can be easily detected and in which the code can be read with high accuracy. The method for production of an identification medium, contains a forming step in which a code printed pattern 107 is formed by printing; and a joining step in which the code printed pattern 107 and a cholesteric liquid crystal layer 102 are joined; wherein the identification medium comprises, in order, seen from an observing side: a cholesteric liquid crystal layer 102, in which a hologram is processed and right circularly polarized light is reflected; a circularly polarizing filter layer 106 having a structure formed by laminating a λ/4 plate and a linearly polarizing filter from the observing side, in which left circularly polarized light selectively penetrates toward the cholesteric liquid crystal layer 102 when natural light enters from the opposite side to the cholesteric liquid crystal layer side 102; and a code printed pattern 107, in which a two-dimensional codes is formed.
Abstract:
A technique detects counterfeit products having appearances similar to authentic products with high accuracy. A cholesteric liquid crystal layer 102 in which hologram is processed (103) and circularly polarized light of primary rotating direction having specific central wavelength can be selectively reflected and a code forming layer in which code printed pattern 107 that is an objective of reading is formed, are arranged in this order seen from a side from which reading is performed. The hologram image that inhibits reading of information of the code while an optical reading device reads it together with the code, and it is formed by the hologram processing 103.
Abstract:
An identification medium (101) having a multilayer structure of a cloth (102), an ordinary print layer (103) of black ordinary ink, and an identification print layer (104) of ink containing cholesteric liquid crystal. Print display utilizing the optical characteristics of the cholesteric liquid crystal can be carried out by forming a predetermined character print by the identification print layer (104). By making the ordinary print layer (103) function as a flattering layer, irregularities on the surface of the cloth (102) are moderated and optical characteristics of the identification print layer (104) can be emerged effectively. Since the identification medium (101) can be composed as the substrate of the cloth (102), design of articles such as clothing or small wares is not damaged and uncomfortable feeling does not occur.
Abstract:
A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. A cholesteric liquid crystal layer 302, having a fine asperity for forming a hologram, is formed on a transparent first substrate 301. A print layer 305 composed of a black ink is formed on a transparent second substrate 304. The substrates are affixed to each other via a bond layer 308, so that a discrimination medium 310 is obtained. In the discrimination medium 310, the display content obtained by the print layer is changed, so that the display content for discrimination can be changed at low cost.