Abstract A pyroelectric element comprising a polymer film which can be converted into pyroelectric substance, the polymer film having a pyroelectric distribution along its surface. The process of producing such a film comprising: POLING DESIRED LOCAL PORTIONS OF THE FILM WHILE VARYING EITHER THE TEMPERATURE AND/OR THE ELECTRIC POTENTIAL OF LOCALIZED AREAS OF THE FILM; A FURTHER PROCESS OF PRODUCING SUCH A PYROELECTRIC ELEMENT WHEREIN A DEFINITE PYROELECTRICITY IS PROVIDED TO THE SURFACE OF THE POLYMER FILM AND THEN A NON-UNIFORM DISTRIBUTION OF PYROELECTRICITY IS PROVIDED BY LOCALLY REDUCING OR ELIMINATING THE PYROELECTRICITY; A PROCESS OF STORING AND REPRODUCING SIGNALS IN SUCH A PYROELECTRIC ELEMENT COMPRISING: STORING POLARIZATION SIGNALS OF DIFFERENT PYROELECTRICITIES IN DIFFERENT PORTIONS OF SUCH AN ELEMENT, AND THEN DELIVERING THE SIGNALS AS A POLARIZATION CHANGE DUE TO A TEMPERATURE CHANGE.
A pyroelectric element comprising a polymer film which can be converted into a pyroelectric substance selected from the group consisting of homopolymers of vinylidene fluoride, vinyl flouride and vinyl chloride; copolymers thereof with monomers copolymerizable therewith; mixtures of said homopolymers and said copolymers; and mixtures of said homopolymers or said copolymers with other polymers; said polymer film having a distribution of pyroelectricity along the surface of said polymer film.
Claim 2
Dependent Claim
69 words
A pyroelectric element comprising a polymer film which can be converted into a pyroelectric substance selected from the group consisting of homopolymers of vinylidene fluoride, vinyl flouride and vinyl chloride; copolymers thereof with monomers copolymerizable therewith; mixtures of said homopolymers and said copolymers; and mixtures of said homopolymers or said copolymers with other polymers; said polymer film having a distribution of pyroelectricity along the surface of said polymer film.
Claim 3
Dependent Claim
23 words
The pyroelectric element as claimed in claim 1 wherein said polymer film is a film of a homopolymer or copolymer of vinylidene fluoride.
Claim 4
Dependent Claim
38 words
The pyroelectric element as claimed in claim 1 wherein said polymer film is composed of a member selected from the group consisting of homopolymers of vinylidene fluoride, copolymers thereof with monomers copolymerizable therewith, polyvinyl chloride and polyvinyl fluoride.
Claim 5
Dependent Claim
34 words
The pyroelectric element as claimed in claim 2 wherein said copolymer is a copolymer of vinylidene fluoride with a monomer copolymerizable therewith selected from the group consisting of vinyl fluoride, trifluoroethylene, chlorotrifluoroethylene and tetrafluoroethylene.
Claim 6
Dependent Claim
18 words
The pyroelectric element as claimed in claim 2 wherein said copolymer contains more than 70 percent vinylidene fluoride.