CN114326273B - A projector array positioning device for light field expansion - Google Patents

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

A projector array positioning device for light field expansion

technical field

The invention belongs to the technical field of projection light field stereoscopic display, and more particularly, the invention relates to a projector array positioning device for light field expansion.

Background technique

Generally, the stereoscopic display of parallel projection light field is composed of a parallel array of projectors and a one-dimensional retroreflective screen coupled. Increasing the number of projectors forming a light field can effectively increase the area covered by the light field and improve the information density of the light field. However, the spatial position of the additional projectors should be precisely designed and positioned to achieve the optimal light field information density enhancement effect. If the user does not have specialized knowledge, it is difficult for the user to expand the light field by himself. Therefore, the present invention proposes a projector array positioning device for light field expansion. The positioning device presets several scale lines for different projection light field display systems according to the objective law of light field stereoscopic display. The user only needs to place the scale at the corresponding scale line position according to the existing structural parameters, and then the information density can be easily adjusted. Optimal way to expand the light field.

SUMMARY OF THE INVENTION

In order to improve the light field information density in an optimal way, the position of the light field projector should be precisely designed. However, users of light field projection systems usually do not have specialized knowledge, and it is difficult to expand the light field by themselves. To solve this problem, the present invention proposes a projector array positioning device for light field expansion. The device presets several scale lines for different projection light field display systems. Users only need to place the scales at the corresponding scale lines according to the structural parameters of the existing projection light field display system, and then the information density can be optimized conveniently. Light field expansion.

The projector array positioning device for light field expansion includes a positioning plate and a ruler.

The positioning plate has at least a number of first-class positioning holes and a number of second-class positioning holes; the positioning plate has at least a left positioning slot of the ruler and a right positioning slot of the ruler; The scale on the right positioning slot of the ruler.

One type of positioning holes are openings with the same length and width, which are arranged one-dimensionally on the positioning plate. The projectors of the existing projection light field system are all installed at the location of the first type of positioning holes.

Type II positioning holes are openings with inconsistent length and width, which are arranged on the perpendicular line of two adjacent Type I positioning holes; Type II positioning holes are arranged in the same direction as Type I positioning holes, and their openings are in the direction of the long axis It is perpendicular to the arrangement direction of the first type of positioning holes.

The left positioning slot of the ruler and the right positioning slot of the ruler are holes with inconsistent length and width, and the left positioning slot of the ruler is located on the left side of the right positioning slot of the ruler.

The scale of the left positioning groove of the scale and the scale of the right positioning groove of the scale are used to show the existing projection light field display system with different structural parameters q , when the light field is expanded, the new projector is adapted. For any existing projection light field display system, let the distance to the one-dimensional retro-reflection screen be l and the width of the projected image to be d , then its structural parameter q=l / d . Assume that the intersection of the straight line where a type of positioning hole is located and the left and right positioning grooves is the left and right origin, and the scales of the left and right positioning grooves of the ruler are respectively displaced from the left and right origin to the scale of k position, and the corresponding optical system should have a structural parameter q satisfying k = g × q , where g is the pitch of a type of positioning hole.

The ruler has at least one ruler positioning hole; the ruler is provided with a left reference line of the ruler and a right reference line of the ruler.

The positioning hole of the ruler is a hole with inconsistent length and width, and the direction of the long axis of the hole is consistent with the arrangement direction of a type of positioning hole. The left reference line of the ruler and the right reference line of the ruler are in the same direction as the long axis of the positioning hole of the ruler, and are used to indicate the position of the central axis of the long axis of the positioning hole of the ruler.

Preferably, at any k position, the identification value is k/g , then the value should be equal to the structural parameter q , so as to be convenient for the user to use.

The projector array positioning device for light field expansion is used as follows:

1. The user measures the structural parameter q of the existing projection light field display system;

2. Move the ruler and align it with the scale, so that the left reference line of the ruler is coincident with the position corresponding to the structural parameter q of the scale of the left positioning groove of the ruler on the positioning plate, and the right reference line of the ruler and the scale of the right positioning groove of the ruler on the positioning plate correspond to the structure The position of the parameter q coincides;

3. Pass through the positioning hole of the ruler and the left positioning slot of the ruler and fix it through a fastener, and pass through the positioning hole of the ruler and the right positioning slot of the ruler and fix it through another fastener, so as to fix the relative position of the ruler and the positioning plate ;

4. The overlapping position of the opening of the positioning hole of the ruler and the opening of the second type of positioning hole is suitable for the newly added projector position when the current existing projection light field display system performs light field expansion.

The working principle of the projector array positioning device for light field expansion is as follows:

For two adjacent projectors arranged in parallel, the light beams emitted by them are retro-reflected and concentrated at the original positions of the projectors. Obviously, there will be less light coverage between the projectors. At this time, when setting a new projector at the intersection of the rightmost projection beam of the left projector and the leftmost projection beam of the right projector, or setting the leftmost projection beam of the left projector and the rightmost projection beam of the right projector If the intersection position is set to add a new projector, the retroreflection light can just cover the space between the two projectors, so it can achieve the optimal condition of information.

Specifically, if the distance from the projector to the one-dimensional retroreflective screen is l , the width of the projected image is d , and the distance between the two projectors is g, the left projector is the rightmost projection beam and the right projector is the most When the intersection point of the left projection beam is set to add a new projector, according to the similar triangle relationship, the distance k between the line where the original two projectors are located to the new projector is k = g × l / d , that is, the parameter k Mark the location of the newly added projector.

In the same way, when setting a new projector at the intersection of the leftmost projection beam of the left projector and the rightmost projection beam of the right projector, also according to the similar triangle relationship, the straight line where the original two projectors are located goes to the newly added projector. The distance k between them also has k = g × l / d , that is, the position of the newly added projector can be identified with this parameter k .

To sum up, the present invention only needs to allow the user to measure the structural parameters of the existing projected light field display system, and needs to place the ruler at the position of the corresponding scale line according to the structural parameters of the existing projected light field display system, so that it can be conveniently Determine the fitting position of the newly added projector, and at the same time, the overlapping position of the opening of the positioning hole of the ruler and the opening of the second type of positioning hole is convenient for fixing the newly added projector and facilitating the expansion of the light field.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a working schematic diagram of the present invention.

FIG. 3 is a schematic diagram of the principle of near-point optical field expansion according to the present invention.

FIG. 4 is a schematic diagram of the principle of performing far-point optical field expansion according to the present invention.

Icons: 100-positioning plate; 111-first-class positioning hole; 112-second-class positioning hole; 113-additional second-class positioning hole; 121-ruler left positioning slot; 122-ruler right positioning slot; 131-ruler left positioning Slot scale; 132-ruler right positioning groove scale; 200-ruler; 210-ruler positioning hole; 221-ruler left reference line; 222-ruler right reference line; 301-left screw; 302-right screw; 400-new projection 501-left projector; 502-right projector.

It should be understood that the above drawings are schematic only and are not drawn to scale.

Detailed ways

FIG. 1 is a schematic structural diagram of a projector array positioning device for light field expansion according to this embodiment. The projector array positioning device for light field expansion includes a positioning plate 100 and a ruler 200 .

The positioning plate 100 has a plurality of first-class positioning holes 111 and a plurality of second-class positioning holes 112; the positioning plate 100 has a left ruler positioning groove 121 and a ruler right positioning groove 122; the left ruler positioning groove 121 is provided with a scale left positioning groove scale 131, The scale right positioning groove 122 is provided with a scale right positioning groove scale 132 .

The first type of positioning holes 111 are openings with the same length and width, which are arranged one-dimensionally on the positioning plate 100 . The projectors of the existing projection light field system are all installed at the location of the first type of positioning holes 111 .

The second-type positioning holes 112 are openings with inconsistent length and width, which are arranged on the vertical line of two adjacent first-class positioning holes 111; The long axis direction of the holes is perpendicular to the arrangement direction of the first type of positioning holes 111 .

The ruler left positioning slot 121 and the ruler right positioning slot 122 are holes with inconsistent length and width, and the ruler left positioning slot 121 is located on the left side of the ruler right positioning slot 122 .

The scale left positioning groove scale 131 and the scale right positioning groove scale 132 are used to show the newly added projector adaptation position 400 when the light field expansion is performed in the existing projection light field display system with different structural parameters q . For any existing projection light field display system, let the distance from the projector to the one-dimensional retro-reflective screen be l and the width of the projected image to be d , then its structural parameter q=l / d . Assume that the intersection of the straight line where a type of positioning hole is located and the left and right positioning grooves is the left and right origin, and the scales of the left and right positioning grooves of the ruler are respectively displaced from the left and right origin to the scale of k position, and the corresponding optical system should have a structural parameter q satisfying k = g × q , where g is the pitch of a type of positioning hole 111 , and in this embodiment, g =6 cm. At this time, at any k position, the identification value is k/g , and its value is directly equal to the structural parameter q , so that it is convenient for the user to use.

The ruler 200 has a ruler positioning hole 210 ; the ruler 200 is provided with a ruler left reference line 221 and a ruler right reference line 222 .

The scale positioning hole 210 is a hole with inconsistent length and width, and the direction of the long axis of the hole is consistent with the arrangement direction of the first type of positioning holes 111 . The ruler left reference line 221 and the ruler right reference line 222 are in the same direction as the long axis of the ruler positioning hole 210 , and are used to indicate the position of the central axis of the long axis of the ruler positioning hole 210 .

Referring to FIG. 2 , the projector array positioning device for light field expansion is used in the following manner.

1. The user measures the structural parameter q of the existing projection light field display system;

If in the existing projection light field display system, the distance from the projector to the one-dimensional retroreflective screen is l = 2 m, and the width of the projected image is d = 1 m, then its structural parameter q = l / d = 2.

2. Move the ruler 200 and align it with the scale, so that the left reference line 221 of the ruler is coincident with the position corresponding to the structural parameter q of the scale 131 of the left positioning groove of the ruler on the positioning plate 100, and the right reference line 222 of the ruler is aligned with the ruler on the positioning plate 100. The position of the right positioning groove scale 132 corresponding to the structural parameter q coincides;

Because g =6 cm in the present embodiment, the scale mark value of the left and right positioning groove scale of the ruler is respectively k/g from the left and right origin displacement to be k position; That is, on the k =6 cm position, the mark value is 1; k =12 cm position , the identification value is 2.

Therefore, the left reference line 221 of the ruler is made to coincide with the position where the value of the scale 131 of the left positioning groove of the ruler on the positioning plate 100 is 2, and the right reference line 222 of the ruler is made to coincide with the position of the scale 132 of the right positioning groove of the ruler on the positioning plate 100 with the value 2.

3. Use a left screw 301 as a fastener to pass through the ruler positioning hole 210 and the ruler left positioning slot 121 and fix it, and use a right screw 302 as another fastener to pass through the ruler positioning hole 210 and the ruler right positioning slot 121 122 and fixed, thereby fixing the relative position of the scale 200 and the positioning plate 100.

4. The overlapping position of the opening of the ruler positioning hole 210 and the opening of the second type of positioning hole 112 is suitable for the newly added projector adaptation position 400 when the current existing projection light field display system performs light field expansion.

Please refer to Figure 3 and Figure 4. The working principle of the projector array positioning device for light field expansion is as follows:

For two adjacent projectors arranged in parallel, that is, the left projector 501 and the right projector 502, the light beams emitted by them are retroreflected and converged at the original positions of the projectors. Obviously, the position between the left projector 501 and the right projector 502 will be less covered by light.

Please refer to FIG. 3 , at this time, when a new projector is set at the intersection of the rightmost projection beam of the left projector 501 and the leftmost projection beam of the right projector 502 , the retroreflected light can just cover the space between the two projectors. Therefore, it can reach the optimal condition of information. At this time, specifically, if the distance from the projector to the one-dimensional retroreflective screen is l , the width of the projected image is d , the distance between the two projectors is g , and the left projector 501 projects the light beam at the far right and the right When the position of the intersection of the leftmost projection beams of the projector 502 is set to the newly added projector, according to the similar triangle relationship, the distance k between the straight line where the original two projectors are located to the newly added projector is k = g × l / d , That is, the parameter k can be used to identify the newly added projector adaptation position 400 . Specifically, two types of positioning holes 112 may be provided on the positioning plate 100 to constrain the newly added projector fitting position 400 .

Further, please refer to FIG. 4, if a new projector is set at the intersection of the leftmost projection beam of the left projector 501 and the rightmost projection beam of the right projector 502, the retroreflected light can also cover the two projectors exactly. Therefore, it can also reach the information optimal condition. Similarly, when the newly added projector is set at the intersection of the leftmost projection beam of the left projector 501 and the rightmost projection beam of the right projector 502, according to the similar triangle relationship, the straight line where the original two projectors are located goes to the newly added projector. The distance k between them also has k = g × l / d , that is, the parameter k can be used to identify the newly added projector adaptation position 400 . Specifically, the newly added projector fitting position 400 may be constrained by the second-type positioning holes 113 additionally provided on the positioning plate 100 .

To sum up, the present invention only needs to allow the user to measure the structural parameters of the existing projection light field display system, and needs to place the ruler 200 at the position of the corresponding scale line according to the structural parameters of the existing projection light field display system, which is convenient. The fitting position 400 of the newly added projector is determined, and the coincident position of the opening of the ruler positioning hole 210 and the opening of the second type of positioning hole 112 is convenient for fixing the newly added projector and facilitating its light field expansion.

Claims (2)

1. A projector array positioning device for light field expansion, characterized in that: The projector array positioning device for light field expansion includes a positioning plate and a ruler; The positioning plate has at least a number of first-class positioning holes and a number of second-class positioning holes; the positioning plate has at least a left positioning slot of the ruler and a right positioning slot of the ruler; The scale of the right positioning groove of the ruler; The first type of positioning holes are openings with the same length and width, which are arranged one-dimensionally on the positioning plate; The projectors of the existing projection light field system are all installed at the location of the first-class positioning holes; Type II positioning holes are openings with inconsistent length and width, which are arranged on the perpendicular line of two adjacent Type I positioning holes; Type II positioning holes are arranged in the same direction as Type I positioning holes, and their openings are in the direction of the long axis It is perpendicular to the arrangement direction of the first-class positioning holes; The left positioning slot of the ruler and the right positioning slot of the ruler are holes with inconsistent length and width, and the left positioning slot of the ruler is located on the left side of the right positioning slot of the ruler; The scale of the left positioning groove of the ruler and the scale of the right positioning groove of the ruler are used to show the existing projection light field display system with different structural parameters q . When the light field is expanded, the adaptation position of the projector is added; for any existing projection light field display system For the projection light field display system, let the distance to the one-dimensional retro-reflective screen be l , and the width of the projected image to be d , then its structural parameter q=l / d ; set the intersection of the straight line where a type of positioning hole is located and the left and right positioning grooves is the left and right origin, the scales of the left and right positioning grooves of the ruler are respectively displaced from the left and right origin by k positions, and the corresponding optical system should have a structural parameter q satisfying k = g × q , where g is the pitch of a type of positioning hole; There is at least one ruler positioning hole on the ruler; the ruler is provided with the left reference line of the ruler and the right reference line of the ruler; The positioning hole of the ruler is a hole with inconsistent length and width, and the direction of the long axis of the opening is consistent with the arrangement direction of a type of positioning hole; the left reference line of the ruler and the right reference line of the ruler are consistent with the long axis direction of the positioning hole of the ruler, which is used to indicate the positioning hole of the ruler The position of the central axis of the long axis. 2. A projector array positioning device for light field expansion as claimed in claim 1, wherein: At any k position, the identification value is k/g , then its value should be equal to the structural parameter q .

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