CN101454729B

CN101454729B - Hologram and corresponding process

Info

Publication number: CN101454729B
Application number: CN2007800196265A
Authority: CN
Inventors: 山内豪; 渡部壮周; 熊泽诚子
Original assignee: Dai Nippon Printing Co Ltd
Current assignee: Dai Nippon Printing Co Ltd
Priority date: 2006-06-02
Filing date: 2007-01-10
Publication date: 2012-07-25
Anticipated expiration: 2027-01-10
Also published as: WO2007141922A1; CN101454729A; CN101957586B; CN101957586A

Abstract

A security hologram and its photographing method are provided with properties of a reproduced image with the sufficient feeling of three-dimensional shape in its longitudinal and lateral directions, difficulty in forging and easy identification of a forged article. The hologram is made of a reflective and volume type hologram (H2), wherein an object image (P) and micro-reflective images (F, Q') of a light source at least either in front of the images or behind them are reproducibly recorded and a relative position of the object image (P) and the micro-reflective images (F, Q') of the light source is variably observed as an observation position (E) is moved along a surface of the hologram.

Description

Hologram and method for imaging thereof

Technical field

The present invention relates to hologram (hologram) and method for imaging thereof, particularly relate to and be difficult to forge and be judged as easily the safe of counterfeit with hologram and method for imaging thereof.

Background technology

About hologram, from its Graphics Design property, as security purposes that can visual judgement, its market also just is unfolded.The hologram that occupies more than half market is the hologram of embossing type, design can visual judgement various designs.But this embossing hologram also can simpler production in recent years, so antifalsification reduces.

But, the hologram of embossing type only can get into the parallax of a certain direction (especially horizontal), so be the relief technique of expression that only can obtain a direction.As the hologram that resists mutually with the embossing hologram, develop the hologram of volume type, in recent years, this volume hologram just is unfolded as the market of security purposes.In length and breadth to all showing relief volume hologram, by with the differential true and false that causes of the design of in the past embossing type hologram judge become essential.In volume hologram; Under the situation that common model is photographed; Can be produced on vertical and horizontal and all have relief photograph, vertically and transversely all have three-dimensional situation but also have because of three-dimensional degree, light source, the design of being taken the photograph body can't easily identify.

In the past, the Micropicture that under common state, can't discern is carried out the volume hologram of the false proof usefulness of stereo recording, for example in patent documentation 1, be disclosed, but still not talkatively as stated can easily obtain having enough relief photograph.

Patent documentation 1: japanese kokai publication hei 11-24538 communique

Summary of the invention

The invention that the present invention accomplishes in view of technological in the past this situation just; Its purpose is, provide a kind of reproduced image on two directions in length and breadth, to have enough stereoscopic sensations and the safety of judgement that is difficult to forge, can easily carries out counterfeit with hologram and method for imaging thereof.

The hologram of the present invention of realizing above-mentioned purpose is made up of reflection-type and volume hologram; Write down shot object image and in the small reflection image of at least one side's at its place ahead or rear light source with the mode that can reproduce; The observation place is moved along hologram page, and the relative position of above-mentioned thus shot object image and above-mentioned small reflection image changes and is observed.

At this moment, above-mentioned shot object image preferably is made up of the picture of part distortion.At this moment, for example above-mentioned shot object image is to be made up of character and graphic, can be that its part of the whole is made up of the character and graphic that is out of shape.In addition, can be that the above-mentioned strained character and graphic part of above-mentioned shot object image and contrast of the character and graphic part that not having beyond it is out of shape take place to reverse and constitute.

In addition, above-mentioned small reflection image is recorded in the place ahead of above-mentioned shot object image and the both sides at rear with the mode that can reproduce, and the small reflection image in above-mentioned the place ahead and the small reflection image at above-mentioned rear can be the reflection image to same light source.

In addition, above-mentioned small reflection image is recorded in the place ahead of above-mentioned shot object image and the both sides at rear with the mode that can reproduce, and preferably its at least one side is more than 1/2nd of diameter of above-mentioned shot object image with respect to the relative position variable quantity of above-mentioned shot object image.

The method for imaging of hologram of the present invention; It is characterized in that; Taken the photograph the hologram record side configuration refractive index body of body; Make and incide the hologram recording material of being taken the photograph the hologram record side configuration of body above-mentioned from above-mentioned first object light of being taken the photograph body and second object light that is described below through above-mentioned refractive index body; Make simultaneously with reference to light and incide above-mentioned hologram recording material and interfere and carry out record, described second object is only by refraction takes place and being constituted by at least one side of the light of the face of the emitting side of above-mentioned refractive index body reflection from the above-mentioned refractive index body of hologram record side direction irradiating illumination light and by the light of the face of the light incident side of above-mentioned refractive index body reflection with at the face of the light incident side of above-mentioned refractive index body.

The method for imaging of another kind of hologram of the present invention; It is characterized in that; Taken the photograph the hologram record side configuration Transflective face of body; Make through above-mentioned Transflective face incide the hologram recording material of being taken the photograph the hologram record side configuration of body above-mentioned from above-mentioned first object light of being taken the photograph body with from the above-mentioned Transflective face of hologram record side direction irradiating illumination light and by second object light of above-mentioned Transflective face reflection, make simultaneously with reference to light and incide above-mentioned hologram recording material and interfere and carry out record.

To sum up, can make the above-mentioned illumination light that shines above-mentioned refractive index body or above-mentioned Transflective face from the hologram record side see through above-mentioned hologram recording material, shine from the front of above-mentioned hologram recording material.

Optically focused is taking place in the above-mentioned illumination light that at this moment, preferably shines above-mentioned refractive index body or above-mentioned Transflective face from the hologram record side near seeing through the position of above-mentioned hologram recording material.

In addition, at least one side of the face of the face of the light incident side of above-mentioned refractive index body or emitting side preferably is made up of curved surface or flexure plane beyond the plane.

At this moment; Above-mentioned refractive index body is that the face by light incident side is that convex surface and emitting side are that the protruding straight and even lens on plane constitute, and will be made as θ with respect to the incident angle of above-mentioned hologram recording material at the reflected light of the illumination light of the outer circumference end reflection of the convex surface of the light incident side of above-mentioned protruding straight and even lens ₁, will be made as θ by the reflected light of the outer circumference end on the plane of emitting side reflection with respect to the incident angle of above-mentioned hologram recording material by refraction in the convex surface illumination light of the light incident side of above-mentioned protruding straight and even lens ₂, will be made as L from above-mentioned hologram recording material to the distance of being taken the photograph body, the size of above-mentioned hologram recording material is made as H, the diameter of above-mentioned protruding straight and even lens is made as R, at this moment, according to satisfied

tan ^-1{(H-2R)/4L}≦θ ₁≦tan ^-1{(2H-R)/2L}

…(1)

tan ^-1{(H+2R)/4L}≦θ ₂≦tan ^-1{(2H+R)/2L}

…(2)

At least one side's mode dispose the line item of going forward side by side.

In addition, above-mentioned Transflective face preferably is made up of plane, curved surface, flexure plane arbitrarily or the face that scatters.

In addition; Through from making above-mentionedly with reference to light incident with above-mentioned first object light and the identical side of above-mentioned second object light, write down first hologram, make and reproduce illumination light and incide above-mentioned first hologram; Make it that diffraction light take place; Make other incide at the volume hologram recording materials of the position configuration of above-mentioned diffraction light incident and it is interfered from opposition side simultaneously, write down second hologram, can obtain hologram of the present invention thus with reference to light.

The method for imaging that the present invention includes through above hologram writes down the hologram that forms.

In hologram of the present invention; Write down shot object image and in the small reflection image of at least one side's at its place ahead or rear light source with the mode that can reproduce; The observation place is moved along hologram page; Relative position between shot object image and the small reflection image changes and is observed thus, so, owing to stereoscopic sensation and the relative position, moving direction, the quantity that simultaneously mirror small reflection image in hologram of the deformation extent of being taken the photograph body in being also included within is forged the difficulty more that becomes; On the other hand, can judge easily that this hologram is really or forges.

Description of drawings

Fig. 1 is the light path figure of an example of method for imaging that is used for explaining the method for imaging phase one of hologram of the present invention.

Fig. 2 is the figure that is used to explain the object picture that with the first object illumination light and the illumination of the second object illumination light time, produces.

Fig. 3 is the figure of the configuration of the expression reflection hologram that is used to write down subordinate phase.

Fig. 4 is used to explain the figure from the reproduced image of second hologram.

Fig. 5 is used for the example of comment figure and the figure of its variation and their deformation image.

The figure of the angular range of outermost light Fig. 6 reflected light that to be expression advance according to the mode of dispersing from the divergence point O ' when photographing with corresponding first hologram of Fig. 1.

The figure of the angular range of outermost light Fig. 7 reflected light that to be expression advance according to the mode of dispersing from the divergence point F when photographing with corresponding first hologram of Fig. 1.

Fig. 8 is the figure that is illustrated in the transparent refractive index body of the former configuration of being taken the photograph body.

Fig. 9 is the figure of the half-mirror (half mirror) that is illustrated in the former configuration of being taken the photograph body.

Among the figure:

1 ... First hologram recording material

2 ... Taken the photograph body

3 ... Lens

4 ... Diffuser plate

5 ... The first object illumination light

6 ... Mask

7 ... Opening

8 ... See through the light of opening

9 ... The second object illumination light

10 ... Positive lens

11 ... First object light

12 ... Second object light

12 ₁Reflected light

12 ₁₀ Reflected light 12 ₁In outermost light

12 ₁₂Reflected light

12 ₂₀ Reflected light 12 ₂In outermost light

13 ... With reference to light

21 ... Second hologram recording material

22 ... Reproduce illumination light

23 ... Diffraction light

24 ... With reference to light

25 ... Reproduce illumination light

31 ... The convex surface of the recording materials side of lens (fronts of lens)

32 ... The plane of the object side of lens (back of lens)

H1 ... First hologram

H2 ... The reflection hologram of subordinate phase (second hologram)

P ... Taken the photograph the virtual image (deformation image, reproduced image) of body

O ' ... Divergence point (reproduced image)

F ... Focal point (reproduced image)

F ' ... Focal point

E ... Observer's eyes

Embodiment

Below, with reference to accompanying drawing hologram of the present invention and its method for imaging are described.

At first, according to photography hologram of the present invention is described in proper order.Hologram of the present invention divides two stages to take.

Fig. 1 is the light path figure of an example that is used to explain the method for imaging of its phase one.With respect to photopolymer first hologram recording materials such as (photo polymer), taken the photograph body 2 towards the transmission-type of a side (right side of figure) configuration plane shape.The example of being taken the photograph body 2 is of the back.In addition, taken the photograph the recording materials 1 side configuration lens 3 of body 2.In this example, lens 3 are positive lenss of plano-convex, make its planar side and are taken the photograph body 2 and connect airtight or separate some distances and dispose.In addition, connected airtight configuration diffuser plate 4 what take the photograph body 2 with lens 3 opposite sides.In addition; When these diffuser plate 4 sides are taken the photograph body 2 and are thrown light on 5 pairs of transmission-types of the first object illumination light; See through transmission-type and taken the photograph the diffusion light of body 2 and form the virtual image of being taken the photograph body 2 through the lens 3 that are configured in its front, first object light 11 of advancing with the mode of coming out from this virtual image incides a side of first hologram recording material 1.

On the other hand; With respect to first hologram recording material, have the mask 6 of minute opening 7 towards opposite side (left side of figure) configuration, when from its with the roughly front of recording materials 1 opposition side when the positive lens 10 usefulness second object illumination light 9 is thrown light on; In a single day optically focused take place in the light 8 that sees through the opening 7 of mask 6; See through near this focal point, dispose recording materials 1, this becomes diverging light and incides lens 3, by the part of backside reflection (Fresnel reflection) illumination light on the surface and the plane of its convex surface; Become second object light 12, incide a side of first hologram recording material 1.

In addition; From making with reference to light 13 and first object light 11, second object light 12 oblique incidence and interfering simultaneously the same side mutually with the light incident side of this first object light 11, second object light 12; Develop, thus the record first hologram H1 in first hologram recording material 1.

To describing through such picture that writes down among the hologram H1 that is configured in.Fig. 2 is the figure that is used to explain the object picture that when throwing light on as stated with the first object illumination light 5 and the second object illumination light 9, produces; The transmission-type that sees through the plane is taken the photograph the diffusion light scioptics 3 of body 2; Observe from recording materials 1 side thus, the quilt that has formed convex-shaped is taken the photograph the virtual image P of body 2.First object light 11 of Fig. 1 incides on first hologram recording material 1 as the light that comes out from this virtual image P.

In addition, in case see through the convex surface 31 that light 8 that opening 7 optically focused of mask 6 disperse subsequently incides recording materials 1 side of lens 3, Fresnel reflection takes place in its part.Its reflected light 12 ₁The light of dispersing as the some O ' from the behind of convex surface 31 incides on first hologram recording material 1.

And then; The part of light 8 that has seen through the convex surface 31 of lens 3 reflects at its face 31; Mode with at other F ' optically focused of the behind of convex surface 31 is advanced, but the quilt that incides lens 3 takes the photograph 32 backs, plane of body 2 sides and reflects, advances to the some F as recording materials 1 side of the lens 3 of the picture of putting F '; After a F, as the light of dispersing from this F 12 ₂, incide first hologram recording material 1.

The reflected light 12 that advances with the mode of dispersing from this O ' ₁With the reflected light of dispersing from a F 12 ₂Become second object light 12 of Fig. 1, incide on first hologram recording material 1.

Can know from above explanation, in hologram H1 with reference to light 13 interference and by the object picture of holographic recording, take the photograph the virtual image P of the scioptics 3 of body 2, the divergence point O ' of its behind and the divergence point F of its front side for the quilt of Fig. 2.

So, use the first hologram H1 of record in first hologram recording material 1 as stated, the reflection hologram H2 of record subordinate phase.Configuration for this reason is shown in Fig. 3.The first hologram H1 (1) of the configuration shooting that utilizes Fig. 1 is configured in the position of Fig. 1; When making light incident side with reference to the light 13 opposite side of the reproduction illumination light 22 of advancing with reference to light 13 opposite directions from the time when photographing incide the back side of the first hologram H1 (1) with record with this; At this moment; Through diffraction light 23 to its place ahead; Refraction and the focal point F that is formed by plane 32 reflections of back take place and the reproduction real image (such reproduced image is also used identical symbol P, F, O ' expression) of the divergence point O ' that formed by convex surface 31 reflections in virtual image P, the convex surface 31 in the front of lens 3 of being taken the photograph body 2, are reproduced under the situation of the spatial configuration when holding the record.Near these reproduced images (in Fig. 3; Taken the photograph body 2 virtual image P near); Second hologram recording material 21 that configuration is made up of photopolymer equal-volume type hologram recording material; This makes with reference to light 24 from a side simultaneously incident opposite with the light incident side of diffraction light 23 and make and interfere, and develops, thus the record second hologram H2 in second hologram recording material 21.This second hologram H2 becomes safety of the present invention and uses hologram.Perhaps, this second hologram H2 of holographic copy and make it have same characteristic obtains safety of the present invention thus and uses hologram.Wherein, this hologram is a reflection hologram.

Fig. 4 is used to explain the figure from the reproduced image of the second hologram H2 that so obtains; When the reproduction illumination light 25 of advancing on the opposite direction that makes when photographing with reference to light 24 with this from when inciding the second hologram H2 (21) with reference to the opposite side of the light incident side of light 24; Taken the photograph the deformation image P based on lens 3 of

body

2,31 refraction takes place and 32 be reflected and the some F that forms, be reflected in the front 31 of lens 3 and the some O ' that forms in the back in the front of lens 3; Spatial configuration when holding the record; Under this state, reproduced as the real image or the virtual image (in the drawings, be real image as P with some F, some O ' is the virtual image).Therefore; If make observer's eye E be positioned at the light incident side that reproduces illumination light 25; Then be observed under these deformation images P, some F, the stereoscopic configurations of some O ' when record, but, can not notice a F and some O ' for common observer; Only see that perhaps the picture of light source is mirrored on every side, do not worry especially.

Relative therewith; Deformation image P is taken the photograph body 2 for example not during the character and graphic shown in Fig. 5 (a) at transmission-type; Through the lens of positive multiplying power (power) 3 years are placed on it,, only be to carry the part that is equipped with lens 3 to become strained character and graphic shown in Fig. 5 (b) as image plane; This becomes convex surface and constitutes as P in the eye E side, so in two directions in length and breadth enough stereoscopic sensations are arranged all.

In addition, these are arranged and are reproduced at depth direction shown in Figure 4 as F, P, O ', so if the deformation image P that takes the photograph body 2 with the quilt of centre is a benchmark; When the eye E that makes the observer, moves downwards as F when relatively moving to top (on arrow is expressed as in Fig. 2), move to the top as O '; On the contrary; When the eye E that makes the observer downwards (in Fig. 2 arrow be expressed as down) when relatively moving, move to the top as F, move downwards as O '.

Therefore, the stereoscopic sensation in being also included within according to the deformation extent of the character and graphic of shot object image P, mirror picture F, the relative position of O ', the moving direction of hologram simultaneously, can judge easily that this hologram is true or false.

Then, in Fig. 4, the picture O ' when research makes observer's eye E relatively move with respect to the second hologram H2 but and the range of observation of picture F and with respect to the moving range of picture O ' and the picture F of deformation image P.

To be expression at the convex surface 31 of lens 3 reflected light 12 of reflection takes place Fig. 6 according to what the mode of dispersing from the divergence point O ' when photographing with the corresponding first hologram H1 of Fig. 1 was advanced ₁In outermost light 12 ₁₀The figure of angular range, mainly the setting of the radius-of-curvature through convex surface 31 will be set minimum θ for respect to the ranges of incidence angles of first hologram recording material 1 _1minTo θ _1maxScope., when will being made as L, the size of first hologram recording material 1 is made as H here, when the diameter of lens 3 is made as R, when will be at the reflected light 12 of the outer circumference end reflection of the convex surface 31 of lens 3 from first hologram recording material 1 to the distance of being taken the photograph body 2 ₁₀Incident angle with respect to first hologram recording material 1 is made as θ ₁The time, with θ _1minAnd θ _1maxBe set as as follows,

θ _1min＝tan ^-1{(H-2R)/4L}

θ＝ _1maxtan ^-1{(2H-R)/2L}

In order to satisfy

θ _1min≦θ ₁≦θ _1max

Promptly

tan ^-1{(H-2R)/4L}≦θ ₁≦tan ^-1{(2H-R)/2L}

…(1)

The reflected light 12 of reflection will take place in the outer circumference end of the convex surface 31 of lens 3 ₁₀Incident angle with respect to first hologram recording material 1 is made as θ ₁, thus, the identification that moves of the picture O ' in the second hologram H2 that finally obtains is guaranteed.That is θ, ₁Lower limit θ _1minAs shown in Figure 4; Be meant when the eye E that makes the observer relatively moves up or down; The picture O ' that relatively moves to equidirectional with respect to the deformation image P that is taken the photograph body 2 but the range of observation center that is limited at the original first hologram H1 (1) of distance be the scope of ± H/4, if reach the boundary ± H/4 beyond this, then reach the periphery of deformation image P as O '; If observer's eye E is outwards moved from this boundary, then will cannot see the earliest as O '.In addition, θ ₁Upper limit θ _1maxBe meant in the eye E that makes the observer equally and move up or down; When arriving the periphery of the first original hologram H1 (1); The position of picture O ' arrives apart from 1/2 position roughly, the center of deformation image P; If observer's eye E is outwards moved from the periphery of the first original hologram H1 (1), in the second hologram H2, does not write down reflected light 12 the earliest ₁So picture O ' becomes and cannot see.

So, θ ₁At θ _1min≦ θ ₁≦ θ _1maxLower limit near, relatively move in the scope of deformation image P as O ', but the center that the observed moving range of observer's eye E is defined as the original first hologram H1 (1) of distance is for about ± H/4.In addition; Above that near the limit; The observed moving range of observer's eye E becomes in the scope of the first original hologram H1 (1), but the relative shifting range of picture O ' is defined as apart from roughly 1/2 the scope for its diameter of the center of deformation image P, and relative moving speed is slack-off.

Certainly, if according to reflected light 12 ₁₀Incide the mode of the outer circumference end of first hologram recording material 1, set for

θ ₁＝tan ^-1{(H-R)/2L}

Then relatively move in the scope of deformation image P as O ', and the observed moving range of observer's eye E becomes in the scope of the first original hologram H1 (1), it is best that identification becomes.

Fig. 7 be convex surface 31 that expression is advanced according to the mode of dispersing from the divergence point F when photographing with the corresponding first hologram H1 of Fig. 1 at lens 3 refraction takes place and on the plane 32 reflection takes place reflected light 12 ₂In outermost light 12 ₂₀The figure of angular range, mainly the setting of the refractive index of radius-of-curvature through convex surface 31 and lens 3 will be set minimum θ for respect to the ranges of incidence angles of first hologram recording material 1 _2minTo maximum θ _2maxScope.The same with the situation of Fig. 6, L, H, R are defined, when will be at the reflected light 12 of the outer circumference end reflection of the convex surface 32 of lens 3 ₂₀Incident angle with respect to first hologram recording material 1 is made as θ ₂The time, be set as as follows,

θ _2min＝tan ^-1{(H+2R)/4L}

θ _2max＝tan ^-1{(2H+R)/2L}

In order to satisfy

θ _2min≦θ ₂≦θ2 _max

Promptly

tan ^-1{(H+2R)/4L}≦θ ₂≦tan ^-1{(2H+R)/2L}

…(2)

Will be at the reflected light 12 that refraction takes place the convex surface of lens 3 31 and reflection takes place for 32 outer circumference end on the plane ₁₂Incident angle with respect to first hologram recording material 1 is made as θ ₂, thus, the identification that moves as F in the second hologram H2 that finally obtains is guaranteed.That is, the same with the situation of Fig. 6, θ ₂Lower limit θ _2minAs shown in Figure 4; Be meant when the eye E that makes the observer relatively moves up or down; But the center that is limited at the original first hologram H1 (1) of distance with respect to the range of observation as F that the deformation image P that is taken the photograph body 2 relatively moves round about if reach the boundary ± H/4 beyond this, then reaches the periphery of deformation image P for the scope of ± H/4 as F; If observer's eye E is outwards moved from this boundary, then will cannot see the earliest as F.In addition, θ ₂Upper limit θ _2maxBe meant in the eye E that makes the observer equally and move up or down; When arriving the periphery of the first original hologram H1 (1); The position of picture F arrives apart from 1/2 position roughly, the center of deformation image P; If observer's eye E is outwards moved from the periphery of the first original hologram H1 (1), in the second hologram H2, does not write down reflected light 12 the earliest ₂So, become as F and cannot see.

So, θ ₂At θ _2min≦ θ ₂≦ θ _2maxLower limit near, relatively move in the scope of deformation image P as F, but the center that the observed moving range of observer's eye E is defined as the original first hologram H1 (1) of distance is for about ± H/4.In addition; Above that near the limit; The observed moving range of observer's eye E becomes in the scope of the first original hologram H1 (1), but is defined as apart from roughly 1/2 the scope for its diameter of the center of deformation image P as the relative shifting range of F, and relative moving speed is slack-off.

Certainly, in this case, if according to reflected light 12 ₂₀Incide the mode of the outer circumference end of first hologram recording material 1, set for

θ ₂＝tan ^-1{(H+R)/2L}

Then relatively move in the scope of deformation image P as F, and the observed moving range of observer's eye E becomes in the scope of the first original hologram H1 (1), it is best that identification becomes.

Wherein, hologram H2 of the present invention is the hologram of volume type and reflection-type, so when the reproduction (observation) of reality, even if do not use reproduction illumination light 25 as shown in Figure 4, also can use the white light under the common environment to reproduce fully.

But; When transmission-type is taken the photograph body 2 for example for the character and graphic shown in Fig. 5 (a),, given the distortion shown in Fig. 5 (b) if in advance this transmission-type takes the photograph body 2 in order further to stress the deformation extent of deformation image P; Then the deformation image P that is out of shape of scioptics 3 is shown in Fig. 5 (c); The distortion of carrying the part be equipped with lens 3 further stressed, this becomes convex surface and constitute as P in the eye E side, so in two directions in length and breadth more significantly stereoscopic sensation is arranged all.

In addition, as the character and graphic of being taken the photograph body 2, like illustration among Fig. 5 (d) with the corresponding quilt of Fig. 5 (b) is taken the photograph body 2; To be made as erect image by the part of lens 3 distortion, will be made as the negative-appearing image of inverted contrast without the part of lens 3, thus; The deformation image P that scioptics 3 are out of shape also year is equipped with the contrast of the part of lens 3 and reverses as Fig. 5 (e) shown in, the performance of reproduced image is horn of plenty more, simultaneously; When scheming for this, distortion is further stressed, so forge the difficulty more that becomes.

In addition, when the shooting of the first hologram H1, make by the transparent body of subject image distortion, shown in Fig. 8 (a), be not limited to plano-convex lens (lens 3 of Fig. 1), can use various refractive index bodies as being configured in recording materials 1 side of being taken the photograph body 2.It is illustrated in Fig. 8 (a)～(f).Fig. 8 (b) is to use the situation of the biconvex lens of positive multiplying power, and Fig. 8 (c) is the situation of the plano-concave lens of negative multiplying power, and Fig. 8 (d) is to use the situation of the biconcave lens of negative multiplying power.And then, shown in Fig. 8 (e), can be the refractive index body that a side or both sides have arbitrary surface (being wavy curved surface among the figure), in addition, shown in Fig. 8 (f), also can be the refractive index body that a side or both sides have flexure plane (jagged flexure plane among the figure).They are the illustrations that are configured in the transparent refractive index body of the front of being taken the photograph body 2, can be other shapes.

So diversified refractive index body is configured in the front of being taken the photograph body 2, hologram of the present invention is taken, the distortion of shot object image P becomes colourful thus, the relief performance more horn of plenty that becomes, and its forgery simultaneously becomes more difficult.And, also become more rich and varied with the picture F, the relative position of the corresponding picture of O ', moving direction, the quantity that mirror simultaneously in the hologram, forge and become more difficult, on the other hand, can judge easily that this hologram is true or false.

And then; When the shooting of the first hologram H1; As the transparent body that is configured in recording materials 1 side of being taken the photograph body 2; Except the refractive index body as shown in Figure 8 of front and back with partial reflection, can also with the half-mirror (Transflective face) of being taken the photograph various shapes of body 2 separate configuration.Under the situation of using such half-mirror; Can't produce by the distortion of subject image; But also can become more rich and varied with the picture F, the relative position of the corresponding picture of O ', moving direction, the quantity that mirror simultaneously in the hologram; It is more difficult that forgery becomes, and on the other hand, can judge easily that this hologram is true or false.The example of such half-mirror is shown in Fig. 9 (a)～(e).Fig. 9 (a) is the half-mirror and the situation of being taken the photograph body 2 configured in parallel with simple plane; Fig. 9 (b) is the situation that the half-mirror of the convex mirror of negative multiplying power is configured in the place ahead of being taken the photograph body 2; Fig. 9 (c) be half-mirror with the plane with respect to the situation of being taken the photograph body 2 oblique configurations, Fig. 9 (d) is configured in the half-mirror of arbitrary surface (being wavy curved surface among the figure) situation in the place ahead of being taken the photograph body 2.And then, shown in Fig. 8 (e), be configured in the situation in the place ahead of being taken the photograph body 2 for half-mirror with the partial reflection zone of scattering.They are the illustrations that are configured in the half-mirror of the front of being taken the photograph body 2, can be other shapes.Wherein, about the reflectivity of half-mirror (Transflective face) and the ratio of transmissivity, can set arbitrarily as required.

More than, be that the basis is illustrated hologram of the present invention and its method for imaging with embodiment, but the present invention is not limited to these embodiment, can carry out various distortion.

Claims

1. a hologram is characterized in that,

Constitute by reflection-type and volume hologram; Write down shot object image and form with the mode that can reproduce in the small reflection image of at least one side's at its place ahead or rear light source; Through the observation place is moved along hologram page, the relative position between said shot object image and the said small reflection image changes and is observed.

2. hologram as claimed in claim 1 is characterized in that,

Said shot object image is made up of the picture of part distortion.

3. hologram as claimed in claim 2 is characterized in that,

Said shot object image is made up of character and graphic, and its part of the whole is made up of the character and graphic of distortion.

4. hologram as claimed in claim 3 is characterized in that,

The said strained character and graphic part of said shot object image is reversed with the contrast of the character and graphic part that does not have distortion beyond it.

5. like any described hologram in the claim 1～4, it is characterized in that,

Said small reflection image is recorded in the place ahead of said shot object image and the both sides at rear with the mode that can reproduce, and the small reflection image in said the place ahead and the small reflection image at said rear are the reflection image to same light source.

6. hologram as claimed in claim 5 is characterized in that,

Said small reflection image is recorded in the place ahead of said shot object image and the both sides at rear with the mode that can reproduce, and its at least one side is more than 1/2nd of diameter of said shot object image with respect to the relative position variable quantity of said shot object image.