CN114326273B - Projector array positioning device for light field expansion - Google Patents
Projector array positioning device for light field expansion Download PDFInfo
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- CN114326273B CN114326273B CN202210257235.3A CN202210257235A CN114326273B CN 114326273 B CN114326273 B CN 114326273B CN 202210257235 A CN202210257235 A CN 202210257235A CN 114326273 B CN114326273 B CN 114326273B
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Abstract
In order to improve the information density of the light field in an optimal information density mode, the position of the light field projector is precisely designed. However, users of light field projection systems usually do not have special knowledge and are difficult to expand the light field by themselves. To solve the problem, the invention provides a projector array positioning device for light field expansion. The projector array positioning device for light field expansion comprises a positioning plate and a ruler. The positioning plate presets a plurality of scale marks for different projection light field display systems, and a user can conveniently expand the light field in an optimal information density mode by only placing the scale at the position of the corresponding scale mark according to the structural parameters of the existing projection light field display system.
Description
Technical Field
The invention belongs to the technical field of projection light field stereoscopic display, and particularly relates to a projector array positioning device for light field expansion.
Background
Generally, the parallel projection light field stereo display is formed by coupling a projector array and a one-dimensional retro-reflective curtain which are arranged in parallel. The area covered by the light field can be effectively increased and the information density of the light field is improved by increasing the number of projectors forming the light field. However, the spatial position of the additional and newly-added projector should be precisely designed and positioned to achieve the optimal light field information density enhancement effect, and if the user does not have special knowledge, the user cannot easily perform light field expansion by himself. Therefore, the invention provides a projector array positioning device for light field expansion. The positioning device presets a plurality of scale marks for different projection light field display systems according to the objective rule of light field stereoscopic display, and a user can conveniently expand the light field in an optimal information density mode only by placing the scale at the position corresponding to the scale marks according to the existing structural parameters.
Disclosure of Invention
In order to improve the information density of the light field in an optimal information density mode, the position of the light field projector is precisely designed. However, users of light field projection systems usually do not have special knowledge and are difficult to expand the light field by themselves. To solve the problem, the invention provides a projector array positioning device for light field expansion. The device presets a plurality of scale marks for different projection light field display systems, and a user can conveniently expand the light field in an optimal information density mode by only placing the scale at the position of the corresponding scale mark according to the structural parameters of the existing projection light field display system.
The projector array positioning device for light field expansion comprises a positioning plate and a ruler.
The positioning plate is at least provided with a plurality of first-type positioning holes and a plurality of second-type positioning holes; the positioning plate is at least provided with a scale left positioning groove and a scale right positioning groove; the scale left positioning groove is provided with scale left positioning groove scales, and the scale right positioning groove is provided with scale right positioning groove scales.
One type of positioning hole is an opening with consistent length and width, and is arranged on the positioning plate in one dimension. Projectors of existing projection light field systems are all mounted at the positions of one type of positioning holes.
The second type of positioning holes are openings with different lengths and widths and are arranged on the perpendicular bisector of two adjacent positioning holes; the arrangement direction of the second type of positioning holes is consistent with that of the first type of positioning holes, and the long axis direction of the openings of the second type of positioning holes is vertical to that of the first type of positioning holes.
The scale left positioning groove and the scale right positioning groove are both holes with inconsistent length and width, and the scale left positioning groove is positioned on the left side of the scale right positioning groove.
Scale for indicating different structural parameters of the scale, left and right positioning groove scalesqWhen the existing projection light field display system expands the light field, the adaptive position of the projector is newly added. For any existing projection light field display system, the distance from the projection light field display system to the one-dimensional retro-reflective curtain is set aslThe width of the projected image isdThen its structural parametersq=l/d. Setting the intersection point of the straight line of the positioning hole and the left and right positioning grooves as the left and right original points, and the displacement of the scale marks of the left and right positioning grooves of the scale from the left and right original points respectively askGraduation of position, structural parameters that the corresponding optical system should haveqSatisfy the requirement ofk =g×qWhereingIs a type of pitch of the positioning holes.
The scale is provided with at least 1 scale positioning hole; the scale is provided with a scale left reference line and a scale right reference line.
The scale positioning hole is an opening with different length and width, and the long axis direction of the opening is consistent with the arrangement direction of the positioning holes. The scale left datum line and the scale right datum line are consistent with the long axis direction of the scale positioning hole and used for indicating the central axis position of the long axis of the scale positioning hole.
Preferably, in anykAt the position, the identification value isk/gIts value should be equal to the structural parameterqSo as to be convenient for users to use.
The projector array positioning device for light field expansion is used in the following way:
1. user measurement of structural parameters of existing projection light field display systemq；
2. The scale is moved and aligned through the scale, so that the corresponding structural parameters of the left reference line of the scale and the scale of the left positioning groove of the scale on the positioning plate areqThe position of the ruler is coincided, and the corresponding structural parameters of the right reference line of the ruler and the scale of the right positioning groove of the ruler on the positioning plate are asqThe positions of the two parts are overlapped;
3. a fastener penetrates through the scale positioning hole and the scale left positioning groove and is fixed, and another fastener penetrates through the scale positioning hole and the scale right positioning groove and is fixed, so that the relative positions of the scale and the positioning plate are fixed;
4. the overlapping position of the opening of the scale positioning hole and the opening of the second type positioning hole is the position of a newly-added projector when the existing projection light field display system is used for light field expansion.
The working principle of the projector array positioning device for light field expansion is as follows:
for two adjacent projectors which are arranged in parallel, light beams emitted by the two adjacent projectors are reflected reversely and then converged at the original positions of the projectors. It will be apparent that locations between projectors will have little light coverage. At this time, when a newly-added projector is arranged at the intersection point position of the rightmost projection beam of the left-side projector and the leftmost projection beam of the right-side projector, or a newly-added projector is arranged at the intersection point position of the leftmost projection beam of the left-side projector and the rightmost projection beam of the right-side projector, the retro-reflective light rays can just cover the space range between the two projectors, and therefore the information optimal condition can be achieved.
Specifically, if the distance from the projector to the one-dimensional retro-reflective screen islThe width of the projected image isdThe distance between the two projectors is g, when a new projector is arranged at the intersection point position of the rightmost projection beam of the left projector and the leftmost projection beam of the right projector, the distance between the straight line where the two original projectors are located and the new projector is arranged according to the relation of similar triangleskIs provided withk= g×l/dI.e. with the parameterkAnd marking the position of the newly added projector.
Similarly, when a new projector is arranged at the intersection point position of the leftmost projection beam of the left projector and the rightmost projection beam of the right projector, the distance between the straight line where the two original projectors are located and the new projector is also set according to the similar triangular relationkAlso havek= g×l/dI.e. with the parameterkAnd marking the position of the newly added projector.
In summary, the present invention only needs to measure the structural parameters of the existing projection light field display system and place the scale at the corresponding position of the graduation line according to the structural parameters of the existing projection light field display system, so as to conveniently determine the adaptive position of the newly added projector, and at the same time, the overlapping position of the positioning hole opening of the scale and the positioning hole opening of the second type facilitates the newly added projector to be fixed, so as to facilitate the light field expansion.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the present invention.
FIG. 3 is a schematic diagram of the near-point optical field expansion according to the present invention.
Fig. 4 is a schematic diagram of the principle of the present invention for performing far-point light field expansion.
Icon: 100-positioning a plate; 111-type positioning holes; 112-type two positioning holes; 113-two types of additional positioning holes; 121-scale left positioning groove; 122-scale right positioning groove; 131-scale left positioning groove scale; 132-scale right positioning groove scale; 200-scale; 210-scale positioning holes; 221-scale left fiducial line; 222-staff right reference line; 301-left screw; 302-right screw; 400-adding a projector adapting position; 501-left projector; 502-right projector.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Detailed Description
Fig. 1 is a schematic structural diagram of a projector array positioning apparatus for light field expansion according to this embodiment. The projector array positioning device for light field expansion comprises a positioning plate 100 and a scale 200.
The positioning plate 100 has a plurality of first-type positioning holes 111 and a plurality of second-type positioning holes 112; the positioning plate 100 has a scale left positioning groove 121 and a scale right positioning groove 122; the scale left positioning groove 121 is provided with scale left positioning groove scales 131, and the scale right positioning groove 122 is provided with scale right positioning groove scales 132.
The first-type positioning holes 111 are holes with the same length and width, and are arranged in one dimension on the positioning plate 100. Projectors of the existing light field projection system are all installed at the positions of the positioning holes 111.
The second-class positioning holes 112 are openings with different lengths and widths and are arranged on the perpendicular bisector of the two adjacent first-class positioning holes 111; the arrangement direction of the second type positioning holes 112 is the same as that of the first type positioning holes 111, and the long axis direction of the openings is perpendicular to that of the first type positioning holes 111.
The scale left positioning groove 121 and the scale right positioning groove 122 are both holes with different lengths and widths, and the scale left positioning groove 121 is located on the left side of the scale right positioning groove 122.
Scale left detent scale 131 and scale right detent scale 132 for showing different structural parametersqThe new projector adapting position 400 of the existing projection light field display system during light field expansion. For any existing projection light field display system, the distance from the projector to the one-dimensional retro-reflective curtain is set aslThe width of the projected image isdThen its structural parametersq=l/d. Setting the intersection point of the straight line of the positioning hole and the left and right positioning grooves as the left and right original points, and the displacement of the scale marks of the left and right positioning grooves of the scale from the left and right original points respectively askGraduation of position, structural parameters that the corresponding optical system should haveqSatisfy the requirement ofk =g×qIn whichgIs a kind of pitch of the positioning holes 111, in this embodimentg=6 cm. At any timekAt the position, the identification value isk/gThen its value is directly equal to the structural parameterqSo as to be convenient for users to use.
The scale 200 has 1 scale positioning hole 210; the scale 200 is provided with a scale left reference line 221 and a scale right reference line 222.
The scale positioning hole 210 is a hole with different length and width, and the long axis direction of the hole is the same as the arrangement direction of the first type positioning holes 111. The scale left reference line 221 and the scale right reference line 222 are aligned with the long axis of the scale positioning hole 210, and indicate the position of the center axis of the long axis of the scale positioning hole 210.
Referring to fig. 2, the projector array positioning apparatus for light field expansion is used as follows.
1. User measurement of structural parameters of existing projection light field display systemq；
If the distance from the projector to the one-dimensional retro-reflective screen is in the existing projection light field display systeml= 2 m, the width of the projected image beingd=1 m, the structural parametersq= l/d=2。
2. The scale 200 is moved and aligned with the scale mark, so that the left reference line 221 of the scale and the scale mark 131 of the left positioning groove of the scale on the positioning plate 100 correspond to the structural parameters ofqAnd the corresponding structural parameters of the scale right reference line 222 and the scale right positioning groove scale 132 on the positioning plate 100 are as followsqThe positions of the two parts are overlapped;
therefore, in this embodimentg=6 cm, the scale of the left and right positioning grooves of the scale is respectively displaced from the left and right original pointskThe scale of the position marks a numerical value ofk/g(ii) a Namely, it iskThe identification value is 1 at the position of =6 cm;kin the position of =12 cm, the index number is 2.
Thus, the scale left reference line 221 is made to coincide with the position on the alignment plate 100 where the scale left positioning groove mark 131 has a value of 2, and the scale right reference line 222 is made to coincide with the position on the alignment plate 100 where the scale right positioning groove mark 132 has a value of 2.
3. The relative positions of the scale 200 and the positioning plate 100 are fixed by a left screw 301 as a fastener passing through the scale positioning hole 210 and the scale left positioning groove 121 and fixed by a right screw 302 as another fastener passing through the scale positioning hole 210 and the scale right positioning groove 122.
4. The overlapping position of the opening of the scale positioning hole 210 and the opening of the second type positioning hole 112 is the adapting position 400 of the newly added projector when the existing projection light field display system performs light field expansion.
Referring to fig. 3 and 4, the operation principle of the projector array positioning apparatus for light field expansion is as follows:
for two adjacent projectors arranged in parallel, namely the left projector 501 and the right projector 502, light beams emitted by the two adjacent projectors are reflected back and then converged at the original positions of the projectors. It is apparent that the position between the left and right projectors 501 and 502 will have little light coverage.
Referring to fig. 3, at this time, when a new projector is disposed at the intersection point of the rightmost projection beam of the left projector 501 and the leftmost projection beam of the right projector 502, the retro-reflective light ray can just cover the space range between the two projectors, so that the information optimization condition can be achieved. At this time, specifically, if the distance from the projector to the one-dimensional retro-reflective screen islThe width of the projected image isdThe distance between the two projectors isgWhen a new projector is arranged at the intersection point of the rightmost projection beam of the left projector 501 and the leftmost projection beam of the right projector 502, the distance between the straight line where the two original projectors are located and the new projector is determined according to the relation of similar triangleskIs provided withk= g×l/dI.e. with the parameterkAnd marking the adaptation position 400 of the newly added projector. Specifically, the second type of positioning holes 112 may be formed in the positioning plate 100 to constrain the adaptive position 400 of the newly added projector.
Further, referring to fig. 4, if a new projector is disposed at the intersection point of the leftmost projection beam of the left projector 501 and the rightmost projection beam of the right projector 502, the retro-reflection light thereof can just cover the space range between the two projectors, so that the information optimization condition can be achieved. Similarly, when a new projector is arranged at the intersection point position of the leftmost projection beam of the left projector 501 and the rightmost projection beam of the right projector 502, the distance between the straight line where the two original projectors are located and the new projector is also set according to the relation of similar triangleskAlso havek= g×l/dI.e. with the parameterkAnd marking the adaptation position 400 of the newly added projector. Specifically, the newly added projector adaptation position 400 can be constrained by the second type of positioning holes 113 additionally formed in the positioning plate 100.
In summary, the present invention only needs to measure the structural parameters of the existing projection light field display system and place the ruler 200 at the corresponding position of the graduation line according to the structural parameters of the existing projection light field display system, so as to conveniently determine the adapting position 400 of the newly added projector, and meanwhile, the overlapping position of the opening of the ruler positioning hole 210 and the opening of the second type positioning hole 112 facilitates the fixing of the newly added projector, so as to facilitate the light field expansion.
Claims (2)
1. A projector array positioning device for light field expansion is characterized in that:
the projector array positioning device for light field expansion comprises a positioning plate and a scale;
the positioning plate is at least provided with a plurality of first-class positioning holes and a plurality of second-class positioning holes; the positioning plate is at least provided with a scale left positioning groove and a scale right positioning groove; the scale left positioning groove is provided with scale left positioning groove scales, and the scale right positioning groove is provided with scale right positioning groove scales;
one type of positioning holes are openings with consistent length and width, and are arranged on the positioning plate in one dimension;
projectors of the existing light field projection system are all arranged at the positions of one type of positioning holes;
the second type of positioning holes are openings with different lengths and widths and are arranged on the perpendicular bisector of two adjacent positioning holes; the arrangement direction of the second type of positioning holes is consistent with that of the first type of positioning holes, and the long axis direction of the openings of the second type of positioning holes is vertical to that of the first type of positioning holes;
the scale left positioning groove and the scale right positioning groove are both provided with holes with inconsistent length and width, and the scale left positioning groove is positioned on the left side of the scale right positioning groove;
scale for indicating different structural parameters of the scale, left and right positioning groove scalesqWhen the existing projection light field display system carries out light field expansion, the adaptive position of a projector is newly added; for any existing projection light field display system, the distance from the projection light field display system to the one-dimensional retro-reflective curtain is set aslThe width of the projected image isdThen its structural parametersq=l/d(ii) a The intersection point of the straight line where the positioning hole is located and the left positioning groove and the right positioning groove is set asLeft and right origin points, and the scales of the left and right positioning grooves of the scale are respectively displaced from the left and right origin pointskGraduation of position, structural parameters that the corresponding optical system should haveqSatisfy the requirement ofk =g×qWhereingIs a type of positioning hole pitch;
the scale is provided with at least 1 scale positioning hole; the scale is provided with a scale left datum line and a scale right datum line;
the scale positioning hole is a hole with different length and width, and the long axis direction of the hole is consistent with the arrangement direction of the positioning holes; the scale left datum line and the scale right datum line are consistent with the long axis direction of the scale positioning hole and used for indicating the central axis position of the long axis of the scale positioning hole.
2. A projector array positioning apparatus for light field expansion as defined in claim 1 wherein:
at randomkAt the position, the identification value isk/gIts value should be equal to the structural parameterq。
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| US20050151941A1 (en) * | 2000-06-16 | 2005-07-14 | Solomon Dennis J. | Advanced performance widget display system |
| US7028899B2 (en) * | 1999-06-07 | 2006-04-18 | Metrologic Instruments, Inc. | Method of speckle-noise pattern reduction and apparatus therefore based on reducing the temporal-coherence of the planar laser illumination beam before it illuminates the target object by applying temporal phase modulation techniques during the transmission of the plib towards the target |
| US7140543B2 (en) * | 2000-11-24 | 2006-11-28 | Metrologic Instruments, Inc. | Planar light illumination and imaging device with modulated coherent illumination that reduces speckle noise induced by coherent illumination |
| KR20040096519A (en) * | 2002-01-04 | 2004-11-16 | 뉴어오케이 엘엘씨 | Three-dimensional image projection employing retro-reflective screens |
| DE10240381A1 (en) * | 2002-08-31 | 2004-03-11 | Schrodt, Stefan | Compensation of the projection and optic axes for projections with several projectors to improve the congruence |
| JP4652727B2 (en) * | 2004-06-14 | 2011-03-16 | キヤノン株式会社 | Stereoscopic image generation system and control method thereof |
| TWI537605B (en) * | 2014-08-28 | 2016-06-11 | 台達電子工業股份有限公司 | Autostereoscopic display device and autostereoscopic display method using the same |
| CN104469344B (en) * | 2014-12-03 | 2017-03-01 | 北京智谷技术服务有限公司 | Light field display control method and device, light field display device |
| CN105043304A (en) * | 2015-09-15 | 2015-11-11 | 沈阳飞机工业（集团）有限公司 | Novel calibration plate and calibration method for performing length measurement by using calibration plate |
| CN106918974B (en) * | 2015-12-24 | 2019-05-03 | 深圳光峰科技股份有限公司 | Projection device, optical projection system and its correcting and regulating method |
| CN106791335B (en) * | 2017-01-25 | 2019-05-14 | 浙江大学 | A kind of compact big visual field optical field acquisition system and its analysis optimization method |
| CN109557666B (en) * | 2017-09-27 | 2023-05-23 | 北京翠鸟视觉科技有限公司 | Near-eye optical imaging system, near-eye display device and head-mounted display device |
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