CN101520637A - Computer generated hologram with parallax in one direction and a variable spatial frequency in another direction - Google Patents
Computer generated hologram with parallax in one direction and a variable spatial frequency in another direction Download PDFInfo
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- CN101520637A CN101520637A CN 200910118725 CN200910118725A CN101520637A CN 101520637 A CN101520637 A CN 101520637A CN 200910118725 CN200910118725 CN 200910118725 CN 200910118725 A CN200910118725 A CN 200910118725A CN 101520637 A CN101520637 A CN 101520637A
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Abstract
The invention provides a fabrication process for a computer-generated hologram 1 wherein amplitude information and phase information are recorded on a given recording surface by means of computation by a computer. The computer-generated hologram 1 is characterized by having a first direction X and a second direction Y orthogonal to the first direction X, and parallax in the first direction X alone. The hologram 1 comprises unit areas B1, B2, B3 to Bm to BM, each one having a given width in the second direction Y. In each unit area B1, B2, B3 to Bm to BM, there is a diffraction pattern having a spatial frequency Cm1, Cm2, Cm3 to Cmt to CmT that varies in the second direction.
Description
Technical field
The present invention relates to the method for making of computer-generated hologram and computer-generated hologram and the computer-generated hologram of making by this method.
Background technology
Always, knownly on bank note or credit card etc., hologram is set for false proof.As this hologram, have by computed computing on the record surface of regulation, to form the computer-generated hologram (CGH) (with reference to patent documentation 1) that interference fringe is made.
2001-No. 013858 communique of [patent documentation 1] Japanese Patent Application Publication
No. 3810917 communiques of [patent documentation 2] Jap.P.
2000-No. 214750 communiques of [patent documentation 3] Japanese Patent Application Publication
2002-No. 72837 communiques of [patent documentation 4] Japanese Patent Application Publication
2005-No. 215570 communiques of [patent documentation 5] Japanese Patent Application Publication
2004-No. 309709 communiques of [patent documentation 6] Japanese Patent Application Publication
2004-No. 264839 communiques of [patent documentation 7] Japanese Patent Application Publication
[non-patent literature 1] A.W.Lohmann and D.P Paris: " Binary FraunhoferHolograms, Generated by Computer ", Appl.Opt., 6,10, pp.1739-1748 (Oct.1967)
[non-patent literature 2] Wai Hon Lee: " Sampled Fourier Transform HologramGenerated by Computer " .Appl.Opt., 9,3, pp.639-643 (Mar.1970)
But, the computer-generated hologram of above-mentioned patent documentation 1, though calculated load is little, the ken is narrow longitudinally.For example, Figure 17 and Figure 18 are the figure of expression prior art.Figure 17 is illustrated in the outboard profile under the situation of shining the regeneration illumination light 102a that constitutes with monochromatic light on the computer-generated hologram 101.As shown in figure 17, the diffraction light 103 that takes place from the unit area of epimere is not to the direction diffraction of viewpoint E.Therefore can not observe the reproduced picture of the epimere part of computer-generated hologram 101 in the position of viewpoint E, the ken can not be expanded longitudinally.In addition, Figure 18 represents to the situation of computer-generated hologram 101 irradiations with the regeneration illumination light 102b of white light formation.As shown in figure 18, though the regeneration illumination light 102b that irradiation constitutes with white light, the constituent parts zone is only visible monochromatic.For example in the diffraction light 103 that the unit area from epimere takes place,, be the blue composition B in the white light 102b of incident towards the light of the direction of viewpoint E.Therefore, in the position of viewpoint E, the reproduced picture of the epimere part of computer-generated hologram 101 is observed to blue B.In addition, middle body is observed to green G, and hypomere partly is observed to red R (not shown).
Have again, disclose in the patent documentation 2 and passed through to use the light source of pointolite conduct, thereby have the technology of the ken of above-below direction (vertically) from the object light of original image.In patent documentation 2 disclosed technology, object light becomes the spherical wave of the pointolite expansion from the original image, the ken expansion of above-below direction.But, because on above-below direction the posting field of restriction hologram record face, so according to the depth position of object and the ken of above-below direction changes.
Summary of the invention
The present invention is the invention of making in view of the such problem of prior art, its objective is method for making that the good computer-generated hologram of a kind of easy observation and security is provided and the computer-generated hologram of making by this method.
The method of making computer-generated hologram of the present invention for achieving the above object, it is the method for making that on the record surface of regulation, writes down the computer-generated hologram of amplitude information and phase information formation by computed computing, it is characterized in that, described computer-generated hologram, have: first direction, with with the second direction of described first direction quadrature, have: the parallax on described first direction only, have: the constituent parts zone that on described second direction, has Rack, in described constituent parts zone, be produced on frequency different diffraction pattern in space on the described second direction.
In addition, it is characterized in that the different spatial frequency on second direction of described diffraction pattern gradually changes from a direction the opposing party in described unit area.
In addition, it is characterized in that the object light that use is expanded at described first direction, expanded in described second direction from the position different with described pointolite from the pointolite that is set on the record object is carried out record.
In addition, it is characterized in that, the object light of fixed width is expanded, had in described second direction to use from being set in the line source that writes down on the object at described first direction, and use and to carry out record, describedly focus on reference to light position to the regulation of each decision of described unit area on described second direction with reference to light.
In addition, it is characterized in that described diffraction pattern is made of interference fringe.
In addition, it is characterized in that described diffraction pattern is made of the figure of phase modulation and amplitude.
And then, it is characterized in that computer-generated hologram is made by the method for making of described computer-generated hologram.
In addition, computer-generated hologram of the present invention for achieving the above object, it is the computer-generated hologram that on the record surface of regulation, writes down amplitude information and phase information formation by computed computing, it is characterized in that, have: first direction and with the second direction of described first direction quadrature, have: the parallax on described first direction only, have: the constituent parts zone that on described second direction, has Rack, in described constituent parts zone, have: the different diffraction pattern of space frequency on described second direction.
In addition, it is characterised in that, states the different spatial frequency on second direction of diffraction pattern, gradually changes from a direction the opposing party in described unit area.
According to the present invention, by with only have parallax at first direction, the different mode of spatial frequency of diffraction pattern of second direction in the unit area is made computer-generated hologram, the diffusion angle of the second direction of change diffraction light therefore can be as the computer-generated hologram of the ken that has enlarged second direction.In addition, because can determine the expansion of the second direction of object light, so the ken of second direction can not change according to the depth position of object with the location independent ground of object.And then, using under the situation of white light as the regeneration illumination light, can when enlarging, the ken observe reproduced picture with white.
Description of drawings
Fig. 1 is the stereographic map of notion of the recording method of expression computer-generated hologram of the present invention.
Fig. 2 is the figure of expression based on the concrete example of the notion of the calculation process of Fig. 1.
Fig. 3 is the vertical view of notion that is used for the calculation process of key diagram 1.
Fig. 4 is the figure of structure of the CGH master of expression present embodiment.
Fig. 5 is the figure of concrete structure of the CGH master of expression present embodiment.
Fig. 6 is the figure of the state of the CGH master of the embodiment 1 of expression present embodiment when making.
Fig. 7 is the stereographic map of the state of the CGH master of the embodiment 1 of expression present embodiment when making.
Fig. 8 is the situation of the regeneration illumination light that constitutes with monochromatic light is shone in expression to the CGH master of embodiment 1 figure.
Fig. 9 is the figure of the state of the CGH master of the embodiment 2 of expression present embodiment when making.
Figure 10 is the figure of other examples of the diverged position Fm1 of expression Y direction.
Figure 11 is the figure of other examples of the diverged position Fm1 of expression Y direction.
Figure 12 is the figure of other examples of the diverged position Fm1 of expression Y direction.
Figure 13 is the figure of other examples of the diverged position Fm1 of expression Y direction.
Figure during Figure 14 regeneration illumination light that to be expression constitute with white light the irradiation of the CGH master of embodiment 1.
Figure 15 is that expression can enough white be observed the figure of the condition of CGH master.
Figure 16 is the light that expression focuses on as the focal position G to regulation with reference to light L, with the figure of object light as the situation of the light of not expanding in the Y direction.
Figure 17 is the figure of expression prior art.
Figure 18 is the figure of expression prior art.
Description of reference numerals
1 CGH master (CGH master recording medium)
2 regeneration illumination light
3 diffraction lights
Embodiment
Below, with reference to the manufacture method of the hologram of description of drawings present embodiment.
In the present embodiment, at first make computer-generated hologram 1.Fig. 1～Fig. 3, the fundamental method of computer-generated hologram 1 is made in expression.
At first, in the present embodiment,, use the object light of only expanding in the one dimension direction of regulation from the pointolite set at original image and the hologram that writes down as computer-generated hologram.This method for making is based on the method for the record of patent documentation 1.That is, as shown in Figure 1, suppose the object light Oi that the Pi of pointolite arbitrarily from the original image O sends, (in the parallel plane plane of XZ) goes up expansion as shown in the figure like that in the present embodiment only in the horizontal direction.So object light Oi only arrives the wire area B on the recording medium 1, on other zone of recording medium 1, object light Oi does not all arrive.When making hologram, though it is very difficult to limit the expansion of object light like this, if under the situation of making hologram that uses a computer, then as long as just can easily control object light by revising arithmetic expression with optical means.Therefore, for the object light of sending from the whole pointolites that constitute original image O, apply same qualification (object light only with the parallel plane plane of XZ in the qualification expanded).The computer hologram of Zhi Zuoing in the present embodiment becomes the computer-generated hologram of the parallax that horizontal direction is only arranged.
Fig. 2 is the stereographic map of expression based on the concrete example of the recording method of above-mentioned key concept.In this embodiment, cut apart original image O and recording medium 1 (record surface) in the horizontal direction by many parallel planes respectively, define the unit area of many wire.That is, as shown in the figure, with original image O be divided into the unit area A1, the A2 that add up to M, A3 ..., Am ... AM, with recording medium 1 similarly be divided into the unit area B1, the B2 that add up to M, B3 ..., Bm ... BM.At original image O is under the situation of stereo-picture, constituent parts zone A1, A2, A3 ..., Am ... AM becomes by cutting apart the zone that this three-dimensional surface portion obtains.Here, M unit area on the original image O and M unit area on the recording medium 1 are respectively man-to-man corresponding relations.For example, M unit area Am on the original image O is corresponding with M unit area Bm on the recording medium 1.
Have again, in the example that this Fig. 2 represents, constituent parts zone A1, A2, A3 ..., Am ... the width of AM, be set to the spacing of the Y direction (being vertical direction in the present embodiment) of the pointolite that defines on original image O and equate, each unit area becomes the zone of the wire that pointolite forms a line.For example, in illustrated embodiment, in m unit area Am, N pointolite Pm1～PmN forms a line.
In addition, constituent parts area B 1, B2, B3 ..., Bm ... the width of BM, be set to the spacing of the Y direction of the pointolite that on original image O, defines and equate, in each unit area, become the zone of the wire that computing point arranges two-dimensionally.(x, ym), expression is positioned at the computing point of the unit area Bm of m to illustrated computing point Q, is positioned in the XY coordinate system that (x is ym) on Biao Shi the position with coordinate figure.
Under this routine situation, (x, interference wave intensity ym) is asked in the following manner about computing point Q.At first, will (x, ym) the unit area Am on the original image O of Suo Shu unit area Bm correspondence be decided to be the operand unit area with this computing point Q.Then, computing point Q (x when the interference wave that forms to object light Om1～OmN of sending by the pointolite Pm1～PmN in this operand unit area Am with reference to light L θ m, when the oscillator intensity of position ym) is asked for, this oscillator intensity is computing point Q (x, interference wave intensity ym) as purpose.Here, for example be and the parallel plane monochromatic collimated beam line of YZ all to incide on the recording medium 1 with reference to light L θ m with same angle in any position.Perhaps with reference to the incident angle θ m of light L θ m, determine according to the imagination illumination of having supposed environment of observation and the setting of imaginary viewpoint, for example, when observing imagination from above the situation of pointolite under, also can set in the following manner: the incident angle θ 1 from the normal direction of recording medium with reference to light L θ 1 for the unit area B1 of upper end becomes little angle δ, becomes big angle beta for the incident angle θ M with reference to light L θ M of the unit area Bm of lower end.
Fig. 3 is the vertical view that is used to illustrate the notion of such calculation process, and original image O that Fig. 2 represents and the CGH master state with recording medium 1 is seen in expression from the top of figure.As shown in the figure, in order to ask for computing point Q (x, ym) the necessary object light of locating of interference wave intensity, be restricted to only be in the operand unit area Am N pointolite Pm1 ..., Pmi ..., the object light Om1 that sends of PmN ..., Omi ..., OmN, do not need to consider object light from the whole pointolites that constitute original image O.Like this, if for the whole computing point Q (x that use definition on the recording medium 1 at the CGH master, ym) ask for the interference wave intensity of regulation respectively, then obtaining should be in the intensity distributions of CGH master with the interference wave of record on the recording medium 1, if the intensity distributions with physically writing down the interference wave that obtains someway then becomes CGH master 1.Particularly, as record in the patent documentation 3,, can make CGH master 1 by the rectangle of the occupation rate corresponding of record on the position corresponding with interfering wave intensity with computing point.
More than, narrated and will be recorded in the method on m the unit area Bm that defines on the CGH master usefulness recording medium 1 with reference to Fig. 1～Fig. 3 in the information of the light source on the m that defines on the original image O the unit area Am.In Xu Shu the model, unit area Am and Bm are elongated rectangular region in the method, and pointolite is arranged one-dimensionally, and computing point is arranged two-dimensionally.
Have again, in above method, for the amplitude of the object light at the computing point Q place on cut zone and the record of phase place, as described above with outside by the method that writes down with the reference Light Interference Streaks, also can be as patent documentation 4,5 records like that with in the depth registration phase place of the ditch of the three-dimensional element that simultaneously has ditch, with the method for the width record amplitude of ditch.
Perhaps, also can be with record amplitude and the phase places such as method of the Lee of record in the method for the A.W.Lohmann of record in the non-patent literature 1, the non-patent literature 2.
Fig. 4 is the figure of structure of the CGH master 1 of expression present embodiment.Fig. 4 (a) is the figure from the system that directions X observation Fig. 2 represents, Fig. 4 (b) is the enlarged drawing from the CGH master 1 of directions X observation.
The CGH master 1 of present embodiment, unit area B1, the B2 of Fig. 4 (a) expression, B3 ..., Bm ... in the BM, make interference fringe in the different mode of intervals (spatial frequency) that makes the Y direction respectively as diffraction pattern, thus the ken of change Y direction.For example, the interference fringe of the Y direction of the unit area Bm of CGH master 1 at interval Cm1, Cm2, Cm3 ..., Cmt ... CmT, shown in Fig. 4 (b), can be with various graphic makings.The interference fringe that illustrates the Y direction as concept map among Fig. 4 (b) at interval Cm1, Cm2, Cm3 ..., Cmt ... CmT, but under many circumstances, the interference fringe pattern of physics forms as the concavo-convex of the surface of CGH master 1.In this case, as shown in Figure 5, irregular cross section is rectangle (Fig. 5 (a)), curve the whole bag of tricks such as (Fig. 5 (b)).In addition, can on the Y direction, not change the decision interference fringe periodically at interval by X-Y scheme by the variation in cross section yet.Have, in Fig. 5, interference fringes different on the Y direction gradually change from a direction the opposing party in unit area at interval, but are not limited thereto, can be with various graphic makings again.
Fig. 6 is the figure of the state of the CGH master 1 of the embodiment 1 of expression present embodiment when making.In present embodiment 1, the diverged position of the Y direction of the light source of object light Om is set at CGH master 1 and diverged position Fm1 observer's opposition side.Therefore, as shown in Figure 7, object light Om is set to, and about directions X, from pointolite P1...Pm...PM expansion, do not send in the Y direction with not expanding, about the Y direction, sends and expands from diverged position F11...Fm1...FM1.Though therefore a little astigmatism takes place, because the distance between original image O and the CGH master 1 is extremely short, so almost not influence.
When setting light source in this wise, shine with reference to light L with the incident angle of regulation, make object light Om and when setting with reference to the mode that light L interferes, in the unit area Bm of the CGH master 1 that Fig. 6 represents, occur interference fringe at interval Cm1, Cm2, Cm3 ..., Cmt ... the interference fringe of CmT.In present embodiment 1, interference fringe occurs in the mode of expanding from the top down with respect to paper at interval.That is, the spatial frequency that CGH master 1 is made as in interference fringe interval Cm1 side uprises, at the spatial frequency step-down of interference fringe interval CmT side.
The figure of the situation of the regeneration illumination light 2 that Fig. 8 CGH master 1 irradiation that to be expression make the mode of the embodiment 1 that represents with Fig. 6 and Fig. 7 is made of monochromatic light.Under the situation of the monochromatic regeneration illumination light of representing for Fig. 6 and Fig. 72 of CGH master 1 irradiation, as shown in Figure 8,, see circular-arcly from the side and expand at the diffraction light 3 of CGH master 1 diffraction, advance while on the Y direction, enlarge the ken.
Fig. 9 is the figure of the state of the CGH master 1 of the embodiment 2 of expression present embodiment when making.In present embodiment 2, the focal position of the Y direction of object light Om is set at focal position Fm2 with respect to observer's side of CGH master.Therefore, object light Om is set to: about the directions X perpendicular to paper, it is not sent from pointolite P1...Pm...PM in the Y direction with expanding, about the Y direction, it is sent from focal position F12...Fm2...FM2.Therefore, though a little astigmatism takes place, because the distance between original image O and the CGH master 1 is extremely short, so almost not influence.
When setting light source in this wise, shine with reference to light L with the incident angle of regulation, make object light Om and when setting with reference to the mode that light L interferes, in the unit area Bm of the CGH master 1 that Fig. 9 represents, occur interference fringe at interval Cm1, Cm2, Cm3 ..., Cmt ... the interference fringe of CmT.In present embodiment 2, interference fringe occurs in the mode that narrows down from the top down for paper at interval.That is, CGH master 1 is made as at the interference fringe spatial frequency step-down of Cm1 side at interval, interference fringe at interval the spatial frequency of CmT side uprise.
Figure 10 is to Figure 13, is expression about the figure of other examples of the diverged position Fm1 of the object light of Y direction or focal position Fm2.Near the figure of Figure 10 when to be expression be configured in diverged position Fm1 the CGH master 1.The expansion of the ken of Y direction at this moment increases.Figure 11 is the figure of expression when diverged position Fm1 disposed away from CGH master 1.The expansion of the ken of Y direction is at this moment dwindled.Figure 12 be expression for all unit area B1, B2, B3 ..., Bm ... BM, close the position of CGH master 1 and diverged position Fm1 is figure fixedly the time.At this moment, design is easy, and calculated load is little.Figure 13 be expression for unit area B1, B2, B3 ..., Bm ... each of BM, the position of CGH master 1 and diverged position Fm1 concerns asynchronous figure.At this moment, can to unit area B1, B2, B3 ..., Bm ... the ken of each change Y direction of BM.In the example that Figure 13 represents, can see simultaneously from the unit area of top and bottom to become big towards the scope of observer's reproduced light.
Figure during regeneration illumination light 2 that Figure 14 CGH master 1 irradiation that to be expression make the mode of the embodiment 1 that represents with Fig. 6 is made of white light.When the regeneration illumination light 2 of CGH master that Fig. 6 is represented 1 irradiation white light, as shown in figure 14, send each and different diffraction lights 3 according to light wavelength from CGH master 1.In the present embodiment, the diffraction light 3 of each corresponding with RGB as shown in figure 14, is advanced on different directions, but can see white in whole region S of the RGB that comprises diffraction light 3.
Here, detailed description can be observed the condition of CGH master 1 with white.Figure 15 is that expression can be observed the figure of the condition of CGH master with white.
In the constituent parts area B m of CGH master 1, incide in the regeneration illumination light 2 in place of high spatial frequency (fmax) of Y direction, the direction of supposing the optical diffraction of the minimal wave length λ B (for example 380nm) that hope is used is that θ Bmax is (in the ZY plane, the Z direction is spent as 0, to be rotated counterclockwise) as positive angle, in addition, incide in the regeneration illumination light 2 in place of lowest spatial frequency (fmin) of Y direction, when the direction of the optical diffraction of the long wavelengths R (for example 780nm) that supposes wish to use is θ Rmin, if satisfy the relation of following conditional (1), then there is the position that to observe the constituent parts area B m of CGH master 1 with white.
θRmin<θBmax …(1)
Here, the angle θ of angle of diffraction etc. supposes it is in the ZY plane Z direction to be spent as 0, and the positive angle that is rotated counterclockwise, its span are-pi/2＜θ＜pi/2.
In addition, when the formula that uses diffraction
1/f＝λ/(sinθout-sinθin)
The spatial frequency of the Y direction of f:CGH
λ: wavelength
θ in: the incident angle of incident light
θ out: during the shooting angle of diffraction light because with the incident angle of incident light as θ L, become
θRmin＝sin
-1(fmin·λR+sinθL)
θBmax＝sin
-1(fmax·λB+sinθL)
So in order there to be the position that to observe the constituent parts area B m of CGH master 1 with white, with θ Rmin and θ Bmax substitution conditional (1), make and satisfy following conditional (2), and then, in order to observe the constituent parts area B m of CGH master 1 with white in the observation place, as long as at the arrow that will give θ Bmax with give intersection point that the arrow of θ Rmin prolongs, will, satisfy following conditional (3) and get final product during towards the angle of eye E from intersection point W as θ as W.
fmin·λR<fmax·λB …(2)
θRmin<θE<θBmax …(3)
Therefore, as long as make each of all unit areas of CGH master 1, formula that satisfies condition (2) and conditional (3), it is all then can to observe CGH with white in the observation place.
Figure 16 be expression with reference to light L to each focal position G of unit area to regulation focus on, the figure of object light when the Y direction is not expanded.As shown in figure 16, reference light L to per unit area B m to the focal position G of the regulation of Y direction focus on, when object light Om sets as the line source of not expanding in the Y direction, the interference fringe in the unit area Bm of CGH master 1 with the interference fringe of Y direction at interval Cm1, Cm2, Cm3 ..., Cmt ... the mode that CmT expands from the top down with respect to paper shows.That is, CGH master 1 be made as interference fringe at interval the spatial frequency of Cm1 side uprise, the interference fringe spatial frequency step-down of CmT side at interval.In addition, the focal position G of Y direction also can be at the observer's of hologram opposition side, and in this case, the interval that is made as the Y direction uprises in the spatial frequency of Cm1 side, at the spatial frequency step-down of CmT side.
Like this, by with the interference fringe of the Y direction in the unit area at interval Cm1, Cm2, Cm3 ..., Cmt ... the mode that CmT is different is made CGH master 1, thereby therefore the diffusion angle of the Y direction of change diffraction light 3 can make the CGH master 1 of the ken that has enlarged the Y direction.And then, when using white light, when can enlarge, observe with white in the ken of Y direction as regeneration illumination light 2.
Abovely the method for making of computer-generated hologram of the present invention and the computer-generated hologram of making by this method have been described, but have the invention is not restricted to these embodiments and various distortion can be arranged according to embodiment.For example, computer-generated hologram of the present invention also can be used the technology as the computing machine synthetic hologram stereographic map of prompting in patent documentation 6 and patent documentation 7.
Claims (9)
1. the method for making of a computer-generated hologram by computed computing record amplitude information and phase information on the record surface of regulation, is characterized in that,
Described computer-generated hologram,
Have: first direction and with the second direction of described first direction quadrature,
Have: the parallax on described first direction only,
Have: on described second direction, have the constituent parts zone of Rack,
In described constituent parts zone, be produced on frequency different diffraction pattern in space on the described second direction.
2. the method for making of computer-generated hologram according to claim 1 is characterized in that, the different spatial frequency on second direction of described diffraction pattern gradually changes from a direction the opposing party in described unit area.
3. according to the method for making of claim 1 or the described computer-generated hologram of claim 2, it is characterized in that the object light that use is expanded at described first direction, expanded in described second direction from the position different with described pointolite from the pointolite that is set on the record object is carried out record.
4. according to the method for making of claim 1 or the described computer-generated hologram of claim 2, it is characterized in that, the object light of fixed width is expanded, had in described second direction to use from being set in the line source that writes down on the object at described first direction, and use and to carry out record, describedly focus on reference to light position to the regulation of each decision of described unit area on described second direction with reference to light.
5. according to the method for making of claim 1, it is characterized in that described diffraction pattern is made of interference fringe to any one described computer-generated hologram of claim 4.
6. according to the method for making of claim 1, it is characterized in that described diffraction pattern is made of the figure of phase modulation and amplitude to any one described computer-generated hologram of claim 4.
7. the computer-generated hologram of making by the method for making of claim 1 any one described computer-generated hologram in the claim 6.
8. a computer-generated hologram by computed computing record amplitude information and phase information on the record surface of regulation, is characterized in that,
Have: first direction and with the second direction of described first direction quadrature,
Have: the parallax on described first direction only,
Have: on described second direction, have the constituent parts zone of Rack,
In described constituent parts zone, have: the different diffraction pattern of space frequency on described second direction.
9. computer-generated hologram according to claim 8 is characterized in that, the different spatial frequency on second direction of described diffraction pattern gradually changes from a direction the opposing party in described unit area.
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| JP2008-287309 | 2008-11-10 | ||
| JP2008287309A JP5170436B2 (en) | 2008-01-22 | 2008-11-10 | Method for producing computer-generated hologram and computer-generated hologram produced by the method |
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| CN107526279A (en) * | 2017-08-16 | 2017-12-29 | 四川大学 | A kind of method for expanding holographic reconstructed image viewing vision area |
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| KR20040083476A (en) * | 2001-12-19 | 2004-10-02 | 액츄앨리티 시스템즈, 인크. | Radiation conditioning system and method thereof |
| JP4316916B2 (en) * | 2003-04-04 | 2009-08-19 | 大日本印刷株式会社 | Computer-generated hologram |
| US6975765B2 (en) * | 2003-05-06 | 2005-12-13 | New Light Industries, Ltd. | Optically variable form birefringent structure and method and system and method for reading same |
| JP4905672B2 (en) * | 2005-12-13 | 2012-03-28 | 大日本印刷株式会社 | Screen switching hologram manufacturing method and screen switching hologram manufactured by the method |
| JP4844250B2 (en) * | 2006-06-14 | 2011-12-28 | 大日本印刷株式会社 | Method and apparatus for manufacturing hologram recording medium |
| JP4844249B2 (en) * | 2006-06-14 | 2011-12-28 | 大日本印刷株式会社 | Method and apparatus for manufacturing hologram recording medium |
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2009
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2012
- 2012-07-26 JP JP2012166111A patent/JP5257640B2/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104126151A (en) * | 2012-02-15 | 2014-10-29 | 奥林奇公司 | Method for encoding a holographic pattern, and corresponding encoding device and computer program |
| CN105223796A (en) * | 2015-09-08 | 2016-01-06 | 北京邮电大学 | Based on hologram computing method and the device of nearly eye display device |
| CN107526279A (en) * | 2017-08-16 | 2017-12-29 | 四川大学 | A kind of method for expanding holographic reconstructed image viewing vision area |
| CN107526279B (en) * | 2017-08-16 | 2019-06-28 | 四川大学 | A method of expanding holographic reconstructed image and watches vision area |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101520637B (en) | 2013-12-18 |
| JP5257640B2 (en) | 2013-08-07 |
| JP2012212183A (en) | 2012-11-01 |
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