WO2021121301A1 - 一种光束校准设备、投影设备及光束校准方法 - Google Patents

一种光束校准设备、投影设备及光束校准方法 Download PDF

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Publication number
WO2021121301A1
WO2021121301A1 PCT/CN2020/137082 CN2020137082W WO2021121301A1 WO 2021121301 A1 WO2021121301 A1 WO 2021121301A1 CN 2020137082 W CN2020137082 W CN 2020137082W WO 2021121301 A1 WO2021121301 A1 WO 2021121301A1
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Prior art keywords
component
light
collimating
color
calibration
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PCT/CN2020/137082
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English (en)
French (fr)
Inventor
杜鹏
蔡春龙
李屹
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深圳光峰科技股份有限公司
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Publication of WO2021121301A1 publication Critical patent/WO2021121301A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings

Definitions

  • This application relates to the field of projection technology, and in particular to a beam calibration device, a projection device, and a beam calibration method.
  • the functions of optical devices such as spectroscopic films, filter films, and polarization conversion films are usually realized by coating.
  • the film coating process due to the influence of various factors such as equipment, materials, labor, processing environment, etc. , Resulting in a certain process error in the coating processing of the optical device, which in turn causes the optical performance of the optical device in the optical path system to be affected to a certain extent, resulting in the color and brightness of the light emitted from the optical path system being affected and the expected effect cannot be achieved.
  • the present application provides a beam alignment device, a beam alignment method, and a projection device.
  • the beam alignment device can improve the color deviation of the light beam emitted by the beam alignment device.
  • the present application adopts a beam calibration device, which includes a color calibration component, a beam collimation component, and a beam splitting component arranged in sequence:
  • a color calibration component for receiving a light beam and guiding the light beam to the beam collimating component
  • the beam collimating component is used to converge the light beam emitted by the color calibration component to the light splitting component;
  • the light splitting component is used for receiving the light beam and splitting the light beam
  • the relative position between the color calibration component and the beam collimating component is adjustable, and the displacement between the optical axis of the light beam emitted by the color calibration component and the optical axis of the beam collimating component is adjusted, Furthermore, the color of the beam emitted by the beam collimating device is improved.
  • this application also proposes a projection device, which includes a light source assembly, a beam calibration device, and a spatial light modulator;
  • the light source assembly provides illuminating light
  • the beam calibration device is used to receive the illumination light, and guide the illumination light to the spatial light modulator after collimating the illumination light;
  • the spatial light modulator modulates the illumination light to form image light and project it onto the projection plane
  • the beam alignment device is the above-mentioned beam alignment device.
  • this application also proposes a beam calibration method, which includes:
  • a color calibration component to receive the light beam and guide the light beam to the beam collimation component
  • a beam calibration device including a color calibration component, a beam collimating component, and a beam splitting component is set to adjust the relative position between the color calibration component and the beam collimating component, so that by adjusting the color calibration component and the beam collimating component Adjust the displacement between the optical axis of the light beam emitted by the color calibration component and the optical axis of the beam collimating component, and then change the angle of incidence of the beam emitted by the beam collimating component into the beam splitting component, so as to affect the optical axis of the beam splitting component.
  • the coating curve is calibrated to achieve the purpose of improving the color of the beam emitted by the beam calibration equipment.
  • Figure 1 is a schematic diagram of the relationship between the coating area of the spectroscopic diaphragm and its incident angle
  • FIG. 2 is a schematic structural diagram of the initial state of the first embodiment of the beam alignment device according to the present application
  • Fig. 3 is a schematic diagram of a coating curve of the spectroscopic component shown in Fig. 2;
  • FIG. 4 is a schematic structural diagram of the adjustment state of the first embodiment of the beam alignment device of the present application.
  • Figures 5a and 5b are diagrams of the color gamut of intrinsic color adjustment
  • Fig. 6a is a schematic structural diagram of the initial state of the second embodiment of the beam alignment device of the present application.
  • FIG. 6b is a schematic structural diagram of the adjustment state of the second embodiment of the beam alignment device according to the present application.
  • Fig. 7a is a schematic structural diagram of the initial state of the third embodiment of the beam alignment device of the present application.
  • FIG. 7b is a schematic structural diagram of the adjustment state of the third embodiment of the beam alignment device according to the present application.
  • FIG. 8 is a schematic structural diagram of a fourth embodiment of a beam collimating device according to the present application.
  • FIG. 9 is a schematic diagram of the coating curve of P light and S light by the spectroscopic component shown in FIG. 8;
  • Fig. 10 is a schematic structural diagram of a fifth embodiment of a beam alignment device according to the present application.
  • FIG. 11 is a schematic structural diagram of an embodiment of a projection device of the present application.
  • FIG. 12 is a schematic flowchart of an embodiment of a beam calibration method according to the present application.
  • first and second in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.
  • a plurality of means at least two, such as two, three, etc., unless otherwise specifically defined.
  • the terms “including” and “having” and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes unlisted steps or units, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment.
  • optical devices such as spectroscopic films and polarization conversion films are usually realized by coating.
  • Common coatings are generally for angle coating, that is, for the same spectroscopic film, different incident angle beams correspond to different coating curves.
  • the incident angles of the beam entering the spectroscopic film are ⁇ a, ⁇ b, and ⁇ c, and the relationship between the three incident angles is ⁇ a> ⁇ b> ⁇ c. It can be seen from Figure 1 that the larger the incident angle
  • the corresponding coating curve of the beam shifts to the shortwave direction, and the cut-off wavelengths corresponding to the three incident angles are 580nm, 600nm, and 620nm respectively.
  • the coating curve of the spectroscopic diaphragm shifts to the shortwave direction as the incident angle increases.
  • the cutoff wavelength is also shifted to the shortwave direction.
  • This application proposes a beam calibration device, which includes a color calibration component, a beam collimation component, and a beam splitting component.
  • the color calibration component is used to guide the received light beam to the beam collimation component; the beam collimation component is used to converge the beam emitted by the color calibration component to the beam splitting component; the beam splitting component is used to receive the beam emitted by the beam collimating component and to The beam is split.
  • the relative position between the color calibration component and the beam collimating component can be adjusted.
  • the optical axis of the beam emitted by the color calibration component and the beam collimating component can be adjusted. The displacement between the optical axes further realizes the color calibration of the beam emitted by the beam calibration device.
  • FIG. 2 is a schematic structural diagram of a first embodiment of a beam collimating device proposed in the present application.
  • the beam calibration device 100 of this embodiment may include a color calibration component 11, a beam collimating component 12, and a beam splitting component 13 arranged in sequence; the light beam emitted by the light source component (not shown in the figure) is incident on the color calibration component.
  • the component 11, the color calibration component 11 receives the light beam and guides the light beam to the beam collimation component 12, the beam collimation component 12 further condenses the light beam emitted by the color calibration component 11 to the beam splitting component 13, and the beam splitting component 13 further splits the beam,
  • the first split light C1 and the second split light C2 are respectively emitted from both sides of the light splitting assembly 13.
  • the optical axis of the light beam collimating assembly 12 is shown by a dotted line passing through the beam collimating device.
  • the relative position between the color calibration component 11 and the beam collimating component 12 is adjustable, and the displacement between the optical axis of the light beam emitted by the color calibration component 11 and the optical axis of the optical axis collimating component is adjusted, thereby improving the beam
  • the color of the light beam emitted by the calibration device 100 that is, the color of the first light beam C1 and the second light beam C2.
  • the beam collimating component 12 in this embodiment is a focusing and collimating device.
  • H is the height of the imaged object of the beam collimating component 12
  • f is the focal length of the beam collimating component 12
  • ⁇ is the angle of the beam emitted by the beam collimating component 12 with respect to its optical axis. It can be understood that when a light beam with a width D enters the beam collimating component 12, if the optical axis of the beam coincides with the optical axis of the beam collimating component 12, then the imaging object height of the beam collimating component 12 is D.
  • the color calibration component 11 and/or the beam collimating component 12 with adjustable positions are moved to adjust the light beam emitted from the color calibration component 11 relative to the optical axis of the beam collimating component 12 to be perpendicular to the light of the beam collimating component 12
  • the movement in the direction of the axis is to adjust the displacement between the optical axis of the light beam emitted by the color calibration component 11 and the optical axis of the beam collimating component 12, thereby adjusting the incident angle of the light beam emitted by the beam collimating component 12 with respect to the beam splitting component 13 .
  • the color calibration component 11 and the beam collimation component 12 in the beam calibration device 100 shown in FIG. 2 be located in their respective initial positions (in this embodiment, the optical axis of the light beam emitted by the color calibration component 11 and the light beam collimation component 12 When the axes coincide, the position of the two is the initial position). At this time, the displacement between the optical axis of the beam and the optical axis of the beam collimating assembly 12 is zero, and the beam splitting assembly 13 is located behind the beam collimating assembly 12 and the position is fixed. The light beam is transmitted along the +z direction shown in Fig.
  • the y direction is the vertical direction of the optical axis of the vertical beam collimating assembly 12 (parallel to the paper), and the x direction is the horizontal direction (vertical to the vertical beam collimating assembly 12).
  • the imaging object height of the beam collimating component 12 is the half-height D/2 of the beam; the beam collimating component 12 converges the beam to the beam splitting component 13, and the optical axis of the beam is incident
  • the angle ⁇ 0 is incident on the beam splitting component 13, and the incident angles of the edge rays of the beam relative to the beam splitting component 13 are ⁇ 1 and ⁇ 2 respectively .
  • the light beam is divided into the first beam and the second beam at the beam splitting component 13 based on the coating curve of the beam splitting component 13 Two beams.
  • Fig. 3 shows the coating curve of the spectroscopic component 13 of this embodiment, where the curve deviating in the long-wave direction is the theoretical coating curve of the spectroscopic component 13 (the coating curve when the coating of the spectroscopic component 13 meets the theoretical spectroscopy requirements), and its corresponding ending
  • the wavelength is set to a; in actual applications, the spectroscopic component 13 has coating errors due to the influence of processing technology and processing environment, which makes its actual coating curve deviate from the ideal coating curve.
  • the curve biased to the short-wave direction is the actual coating curve of the spectroscopic component 13 (In this embodiment, the deviation of the actual coating curve from the ideal coating curve in the short-wave direction is taken as an example), and the corresponding cut-off wavelength is set to b. From this, it can be seen that the shift of the cut-off wavelength causes deviations in the splitting ratio of the first light beam and the second light beam obtained by the light splitting assembly 13, which in turn causes deviations in the color of the light beam after the splitting.
  • the first and second beams after theoretical splitting are light with a wavelength greater than 600nm and light with a wavelength less than 600nm, respectively; and when the actual cutoff wavelength shifts to shortwave and becomes 580nm, because The angle of incidence remains unchanged, and the actual cut-off wavelength is 580nm.
  • the first and second beams after actual splitting are light with a wavelength less than 580nm and light with a wavelength greater than 580nm, respectively.
  • the actual splitting ratios of the first and second beams are the same. The spectroscopic ratio is shifted from the theoretical one, and the color of the first beam and the second beam is different from the theoretically required color due to the change of the spectrum.
  • the relative position between the color calibration component 11 and the beam collimation component 12 is adjusted so that the light beam emitted by the color calibration component 11 is in a direction perpendicular to the beam collimation component 12 Moving upward in the +y direction, the optical axis of the beam produces a displacement s in the +y direction relative to the optical axis of the beam collimating assembly 12.
  • the height H of the imaged object becomes larger, and the corresponding tan ⁇ value also becomes larger, and the angle ⁇ of the beam emitted by the beam collimating component 12 with respect to its optical axis becomes larger; according to the angle
  • the relationship shows that the sum of the included angle of the beam emitted by the beam collimating component 12 with respect to its optical axis and the incident angle of the beam entering the beam splitting component 13 is equal to the angle between the normal of the beam splitting component 13 and the optical axis of the beam collimating component 12, and In this embodiment, the position of the beam splitting component 13 remains unchanged, and the angle between its normal and the optical axis of the beam collimating component 12 remains unchanged.
  • the angle ⁇ of the beam emitted by the beam collimating component 12 with respect to its optical axis becomes larger At this time, it is equivalent to making the incident angle of the light beam incident on the beam splitting component 13 smaller.
  • the main optical axis of the light beam enters the beam splitter assembly 13 at an incident angle ⁇ 3 compared to the incident angle ⁇ 0 shown in Fig. 2 is reduced, and the edge rays of the beam enter the beam splitter assembly 13 at the incident angles ⁇ 4 and ⁇ 5 Compared to the incident angles ⁇ 1 and ⁇ 2 shown in FIG. 2, the incident angles ⁇ 1 and ⁇ 2 are also reduced.
  • the specific adjustment of the angle value of the incident angle can be controlled by the displacement s between the optical axis of the beam and the optical axis of the beam collimating assembly 12. The larger is, the more the angle of incidence decreases.
  • the light beam emitted by the color calibration component 11 in this embodiment can also move in other directions perpendicular to the beam collimation component 12, such as the -y direction or the x direction. It should be noted that when the light beam emitted by the color calibration component 11 moves in the -y direction perpendicular to the beam collimating component 12, the displacement s between the optical axis of the beam and the optical axis of the beam collimating component 12 is negative. At this time, the object height of the beam collimating component 12 becomes smaller, the corresponding tan ⁇ value also becomes smaller, and the value of ⁇ becomes larger.
  • the calibration of the coating curve of the beam splitting component 13 is to make the beam splitting component
  • the actual coating curve of 13 shifts to the shortwave direction.
  • the movement of the beam emitted by the color calibration component 11 in other directions perpendicular to the beam collimation component 12 is similar to the movement in the y direction, and will not be repeated here.
  • the specific movement direction can be adjusted according to the actual optical path design and requirements. This application does not make specific restrictions.
  • the beam calibration device 100 of this embodiment can calibrate the intrinsic colors of the three primary colors in the three-primary color imaging based on the color calibration of the split beams, where the intrinsic color indicates the color of the emitted colored light itself.
  • the beam calibration device 100 is used in a light projection machine, that is, the color of the light beam emitted by the projection light machine itself. If the light beam incident on the color calibration component 11 is three primary colors including red light, green light and blue light, the structure of the beam calibration device 100 is also shown in FIG. 2, and FIG. 3 shows the coating curve of the spectroscopic component 13 contained therein.
  • the curve deviating to the long-wave direction is the theoretical coating curve of the optical splitter assembly 13 and its corresponding cut-off wavelength is set to 600 nm; the curve deviating to the short-wave direction is the actual coating curve of the spectroscopic assembly 13 and its corresponding cut-off wavelength is set to 580 nm.
  • the first beam and the second beam divided by the beam splitter 13 are red light with a wavelength greater than 600nm, and a mixed light of blue and green light with a wavelength less than 600nm.
  • the theoretical color gamut can be shown in Figure 5a.
  • the first light beam and the second light beam divided by the light splitting component 13 are red light with a wavelength greater than 580nm and a mixed light of blue and green light with a wavelength less than 580nm. In other words, its wavelength is always smaller than the cut-off wavelength, so it has little effect on the light splitting of blue light.
  • the separated green light lacks the light in the range of 580nm to 600nm, which is very important for the separated red light. It is said that compared with the theoretical red light, the light in the range of 580nm to 600nm is increased, which causes the color coordinates of the actual green light and the actual red light to be shifted.
  • the red light and the green light of the split light are respectively red. Take fluorescence and green fluorescence as an example. At this time, as shown in Figure 5a, the color coordinates of red fluorescence and green fluorescence are both within the theoretical color gamut (solid triangle). The formed color gamut cannot cover the theoretical color gamut.
  • the color coordinates of red light and green light can be adjusted by adding complementary lasers of corresponding colors in the optical path system, that is, adding green lasers and red lasers respectively to obtain intrinsic green light by mixing green lasers and green fluorescence.
  • the intrinsic red light is obtained by mixing red laser and red fluorescent light.
  • the actual color gamut (thick triangle) constituted by intrinsic red light, intrinsic green light and intrinsic blue light can cover the theoretical color wheel, but additional The supplementary laser will increase the cost, and the color calibration software is required to modulate the actual color gamut to obtain the theoretical color gamut.
  • This modulation process will cause light loss and decrease the overall brightness; in addition, the increase of the supplementary laser will increase the optical path
  • the heat of the system is not conducive to the heat dissipation of the optical path structure, especially the heat dissipation of image modulation devices (such as spatial light modulators, etc.).
  • the coating curve of the spectroscopic component 13 has a large deviation from the theoretical coating curve, even if the supplementary laser of the corresponding color is supplemented, the color coordinates of the intrinsic red light and/or the intrinsic green light cannot be calibrated to the theoretical level. Outside the color gamut, as shown in Figure 5b, the color coordinates of the intrinsic red light are still within the theoretical color gamut when the red laser is supplemented, and cannot cover the theoretical color gamut.
  • the relative position between the color calibration component 11 and the beam collimation component 12 can be adjusted, so that the beam emitted by the color calibration component 11 is perpendicular to the beam collimation component 12 Moving to the +y direction in the direction, the optical axis of the beam is displaced relative to the optical axis of the beam collimating assembly 12 by a displacement s, which increases the height of the imaged object of the beam collimating assembly 12, and the emitted light beam enters the beam splitting assembly 13
  • the value of the incident angle ⁇ becomes smaller, the actual coating curve is shifted to the theoretical coating curve, and then the splitting ratio of red and green light of the light splitting component 13 is adjusted to make the splitting ratio of red and green light as far as possible to meet the theoretical
  • the light splitting ratio modulates the color coordinates of the intrinsic red light and the intrinsic green light to realize the calibration of the intrinsic colors of the three primary colors in the three-primary color imaging.
  • the color calibration component 11 may be a lens group including at least one lens, and the light beam of the light source component enters the color calibration component 11 and then emits the beam in the form of parallel light. At this time, by moving the color calibration component 11 in a direction perpendicular to the optical axis of the beam collimating component 12, the relative position of the color calibration component 11 and the beam collimating component 12 can be adjusted, and then the color calibration component 11 can be changed. The relative displacement between the optical axis of the outgoing beam and the optical axis of the beam collimating assembly 12.
  • an adjustment bracket for adjusting the position of the color calibration assembly 11 may be provided.
  • the adjustment bracket may include an adjustment rod in the x-direction and y-direction, an adjustment motor, an adjustment gear, and an adjustment slide rail.
  • One, or a combination of multiple adjustment mechanisms may be provided.
  • the color calibration component 11 can also be a mirror component 14.
  • a mirror pair composed of two mirrors is taken as an example.
  • the light beam emitted by the light source component It is incident on the first mirror 141, is reflected by the first mirror 141 to the second mirror 142, and is further reflected by the second mirror 142 to the color calibration component 11.
  • the first reflecting mirror 141, the second reflecting mirror 142 and the beam collimating component 12 are respectively located at their initial positions.
  • the optical axis of the light beam reflected by the second reflecting mirror 142 is in line with the beam collimating component 12
  • the optical axes of are coincident, and the light path structure behind the color calibration component 11 is the same as the light path structure shown in FIG. 2 at this time, and will not be repeated here.
  • the displacement between the optical axis of the light beam emitted by the second mirror 142 and the optical axis of the beam collimating assembly 12 can be adjusted by deflecting the first mirror 141 and the second mirror 142. As shown in Figure 6b, the first reflector 141 and the second reflector 142 simultaneously deflect in the -y direction.
  • the light path of the light source component incident on the first reflector 141 and the second reflector 142 shifts, and finally deviates from the second
  • the beam emitted by the mirror 142 moves in the +y direction, that is, the displacement between the optical axis of the beam emitted by the second mirror 142 and the optical axis of the beam collimating assembly 12 is adjusted in the y direction, thereby improving beam alignment
  • the color of the light beam emitted by the device 200 is the same as the improvement process of the above-mentioned embodiment shown in FIGS. 2 to 4, and will not be repeated here. .
  • the angle between the first mirror 141 and the second mirror 142 remains unchanged, that is, when the first mirror 141 and the second mirror 142 are rotated, they rotate synchronously.
  • the angle between the first mirror 141 and the second mirror 142 is maintained at 90°, that is, the first mirror 141 and the second mirror 142 are always vertical.
  • the reflector group 14 may also include more reflectors, and the relative position relationship between the reflectors can be designed to realize that the beam enters the beam collimating component 12 as parallel light, which is not specifically limited in this application.
  • the color calibration component 11 can also be a right-angle prism 15.
  • the two right-angle surfaces of the right-angle prism 15 are two reflective surfaces 151, 152, and the light source component emits
  • the light beam enters the right-angle prism 15 from the inclined surface 153 of the right-angle prism 15, is reflected on the first reflection surface 151 to the second reflection surface 152, is further reflected by the second reflection surface 152 and then exits the inclined surface 153.
  • the right-angle prism 15 and the beam collimating component 12 are respectively located in their initial positions.
  • the optical axis of the beam emitted by the right-angle prism 15 coincides with the optical axis of the beam collimating component 12, and the color calibration component
  • the light path structure behind 11 is the same as the light path structure shown in FIG. 2 and will not be repeated here.
  • the displacement between the optical axis of the light beam emitted from the right-angle prism 15 and the optical axis of the beam collimating component 12 can be adjusted by deflecting the right-angle prism 15. As shown in Figure 7b, the right-angle prism 15 is deflected in the -y direction.
  • the incident light beam of the light source system shifts in the optical path between the first reflection surface and the second reflection surface of the right-angle prism 15, and finally exits the right-angle prism 15
  • the light beam moves in the +y direction, that is, the displacement between the optical axis of the light beam emitted by the right-angle prism 15 and the optical axis of the beam collimating assembly 12 is adjusted in the y direction, thereby improving the light beam emitted by the beam collimating device 300
  • the improvement process of the color of the light beam emitted by the beam calibration device 300 in this embodiment is the same as the improvement process of the above-mentioned embodiment shown in FIGS. 2 to 4, and will not be repeated here.
  • an adjustment bracket for adjusting the rotation angle of the mirror assembly 14 and the right-angle prism 15 can be provided.
  • the adjustment bracket may include a rotating gear, an adjustment motor, an adjustment slide rail, etc.
  • the relative position between the color calibration component 11 and the beam collimation component 12 can also be adjusted by moving the position adjustment of the beam collimating component 12 in a direction perpendicular to the optical axis of the beam collimating component 12 , Thereby changing the relative displacement between the optical axis of the beam emitted by the color calibration component 11 and the optical axis of the beam collimating component 12, thereby improving the color of the beam emitted by the beam calibration device 100.
  • the beam calibration device is implemented.
  • the improvement process of the color of the light beam emitted by 100 is the same as the improvement process of the above-mentioned embodiment shown in FIGS. 2 to 4, and will not be repeated here.
  • the relative displacement between the optical axis of the light beam emitted by the color calibration assembly 11 and the optical axis of the beam collimating assembly 12 can also be adjusted by moving the position of the light source. As shown in Figure 6a and Figure 7a, moving the light source assembly in the direction perpendicular to the optical axis of the beam collimating assembly 12 can also adjust the distance between the optical axis of the beam emitted by the color calibration assembly 11 and the optical axis of the beam collimating assembly 12 Displacement to improve the color of the light beam emitted by the beam collimating device 200, 300.
  • FIG. 8 is a schematic structural diagram of another embodiment of the beam collimating device according to the present application.
  • the beam collimating device 400 of this embodiment on the basis of the beam collimating device 100 shown in FIG. 2, may further include a polarization converter 16, which is arranged in the color calibration component 11 and the beam collimator
  • the components 12 are used to receive the light beam emitted by the color calibration component 11, modulate the polarization state of the light beam, and convert the light beam into a single polarization state light beam and emit it.
  • the beam collimating component 12 and the beam splitting component 13 are the same as the beam collimating component 12 and the beam splitting component 13 in the embodiment shown in FIG. 1 to FIG. 7, and will not be repeated here.
  • the function of the polarization converter 16 is realized by coating. Similar to the beam splitter 13, there will also be a certain coating error. As a result, the polarization converter 16 cannot completely convert the incident light beam into a single polarization beam.
  • the light splitting component 13 has a certain difference in the coating curves of the P light and the S light of the S polarization state, as shown in Figure 9, when the incident light includes both P light and S light, the light splitting component 13 is The actual coating curve is between the P light coating curve and the S light coating curve. If S light is required, the actual coating curve is shifted to the shortwave direction relative to the S light coating curve; if P light is required, the actual coating curve is shifted to the long wave direction relative to the P light coating curve.
  • the displacement between the optical axis of the light beam emitted by the color calibration component 11 and the optical axis of the beam collimating component 12 can be adjusted so as to make The actual coating curve is calibrated to the theoretical coating curve to improve the color of the beam emitted by the beam calibration device 400.
  • FIG. 10 is a schematic structural diagram of still another embodiment of the beam collimating device of the present application.
  • the beam alignment device 500 of this embodiment on the basis of the beam alignment device 400 shown in FIG. 8, may further include a light homogenizing component 17, which is arranged on the color calibration component 11 and the beam collimator
  • the components 12 are used to receive the light beam emitted by the color calibration component 11 and perform homogenization processing on the light beam, so that the light beam of the incident beam collimating component 12 is a beam with uniform surface distribution.
  • the homogenizing component 17 may be a pair of fly-eye lenses, including a first fly-eye lens 171 and a second fly-eye lens 172.
  • the first fly-eye lens 171 is located on the effective focal length of the second fly-eye lens 172.
  • the beam distribution on the fly-eye lens 171 will be imaged at infinity.
  • the light homogenizing component 17 may also be other light homogenizing devices such as a light homogenizing rod, which is not specifically limited in this application.
  • the polarization converter 16 shown in FIG. 9 and/or the light homogenizing component 17 in FIG. 10 may also be provided in the beam collimating device 100 shown in FIGS. 6 to 7.
  • the projection device 600 includes a light source assembly 110, a beam collimating device 120, and a spatial light modulator 130; the light source assembly 110 is used for illuminating light; the beam collimating device 120 is used After receiving the illuminating light, the illuminating light is calibrated and guided to the spatial light modulator 130; the spatial light modulator 130 modulates the illuminating light to form image light and project it to the projection plane.
  • the beam collimating device 120 may be the beam collimating device of any of the embodiments shown in FIGS. 2 to 10.
  • the light source assembly 110 may be a hybrid light source composed of a fluorescent light source and a laser light source.
  • the fluorescent light source is used to provide broad-spectrum fluorescent light to be divided into two primary color fluorescent light containing primary color spectrum with different wavelength ranges at the beam splitting component of the beam calibration device.
  • the light source is used to provide the third primary color light.
  • the three primary color lights are respectively guided to the spatial light modulator 130 for image light modulation to form image light.
  • the light splitting component divides the light beam into the first light beam C1 and the second light beam C2 as shown in FIG. 2 to FIG. 10, and the corresponding spatial light modulator 130 can be configured as a double spatial light modulator.
  • the modulator respectively modulates the first light beam C1 and the second light beam C2.
  • the mixed light of blue and green light can be further split, and the corresponding spatial light modulator 130 can be configured as a three-spatial light modulator, and the three spatial light modulators modulate the three primary colors respectively.
  • the projection device 600 of this embodiment can use the beam calibration device 120 to calibrate the intrinsic color of the beam incident on the spatial light modulator 130 after splitting, thereby calibrating the actual color gamut of the beam; in addition, it can avoid the light caused by software modulation. Loss, improve image brightness. At the same time, the dependence of the projection equipment on the supplementary laser can be reduced, which is more conducive to the heat dissipation of the projection equipment and reduces the cost.
  • this application also proposes a beam calibration method, which includes:
  • step S1 a color calibration component is provided to receive the beam and guide the beam to the beam collimation component;
  • step S2 the beam collimating component is used to converge the light beam to the light splitting component for light splitting;
  • step S3 the relative position between the color calibration component and the beam collimating component is adjusted so as to shift the light beam emitted by the color calibration component in the direction perpendicular to the optical axis of the beam collimating component, thereby improving the light splitting The color of the light beam emitted by the component.
  • the beam calibration method of this embodiment can be applied to the beam calibration device shown in FIG. 2 to FIG. 10 or the projection device shown in FIG. 11.

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Abstract

本申请公开了一种光束校准设备、投影设备及光束校准方法，该光束校准设备包括依次设置的颜色校准组件、光束准直组件和分光组件：颜色校准组件，用于接收光束并将光束引导至光束准直组件；光束准直组件，用于将颜色校准组件出射的光束汇聚至分光组件；分光组件用于接收光束并对光束进行分光，其中，颜色校准组件与光束准直组件之间的相对位置可调。通过调节颜色校准组件与光束准直组件之间的相对位置来调节颜色校准组件出射的光束的光轴与光束准直组件的光轴之间的位移量，进而改变光束准直组件出射的光束入射分光组件的入射角，从而对分光组件的镀膜曲线进行校准，实现改善光束校准设备出射的光束颜色的目的。

Description

一种光束校准设备、投影设备及光束校准方法 技术领域
本申请涉及投影技术领域，特别涉及一种光束校准设备、投影设备及光束校准方法。
背景技术
在光学领域中，分光膜片、滤光膜片、偏振转换片等光学器件的功能通常是通过镀膜实现，而在膜片镀膜加工时由于设备、材料、人工、加工环境等各种因素的影响，导致光学器件的镀膜加工存在一定的工艺误差，进而导致光学器件在光路系统中的光学性能受到一定影响，导致光路系统的出射光的颜色、亮度等收到影响而无法达到预期的效果。
发明内容
本申请提供一种光束校准设备、光束校准方法及投影设备，所述光束校准设备能够改善光束校准设备出射的光束的颜色出现偏差的问题。
为解决上述技术问题，本申请采用的一种光束校准设备，该光束校准设备包括依次设置的颜色校准组件、光束准直组件和分光组件：
颜色校准组件，用于接收光束并将所述光束引导至所述光束准直组件；
所述光束准直组件，用于将所述颜色校准组件出射的光束汇聚至所述分光组件；
所述分光组件用于接收所述光束并对所述光束进行分光；
其中，所述颜色校准组件与所述光束准直组件之间的相对位置可调，调节所述颜色校准组件出射的光束的光轴与所述光束准直组件的光轴之间的位移量，进而改善所述光束校准设备所出射的光束的颜色。
另一方面，本申请还提出一种投影设备，该投影设备包括光源组件、 光束校准设备和空间光调制器；
所述光源组件提供用于照明光；
所述光束校准设备用于接收所述照明光，对所述照明光进行校准后引导至所述空间光调制器；
所述空间光调制器对所述照明光进行调制形成图像光投射至投影平面；
其中，所述光束校准设备为上述光束校准设备。
另一方面，本申请还提出一种光束校准方法，该方法包括：
提供颜色校准组件，以接收光束并将所述光束引导至光束准直组件；
利用所述光束准直组件将所述光束汇聚至分光组件进行分光；
调整所述颜色校准组件与所述光束准直组件之间的相对位置，以在垂直于所述光束准直组件的光轴的方向上，使所述颜色校准组件所出射的光束产生位移量，进而改善所述分光组件出射的光束的颜色。
本申请通过设置包含颜色校准组件、光束准直组件和分光组件的光束校准设备，令颜色校准组件与光束准直组件之间的相对位置可调，从而通过调节颜色校准组件与光束准直组件之间的相对位置来调节颜色校准组件出射的光束的光轴与光束准直组件的光轴之间的位移量，进而改变光束准直组件出射的光束入射分光组件的入射角，从而对分光组件的镀膜曲线进行校准，实现改善光束校准设备出射的光束颜色的目的。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图，其中：
图1是分光膜片的镀膜区域与其入射角的关系示意图；
图2是本申请光束校准设备第一实施例的初始状态的结构示意图；
图3是图2中所示的分光组件的镀膜曲线示意图；
图4是本申请光束校准设备第一实施例的调节状态的结构示意图；
图5a和图5b是本征颜色调节的色域示图；
图6a是本申请光束校准设备第二实施例的初始状态的结构示意图；
图6b是本申请光束校准设备第二实施例的调节状态的结构示意图；
图7a是本申请光束校准设备第三实施例的初始状态的结构示意图；
图7b是本申请光束校准设备第三实施例的调节状态的结构示意图；
图8是本申请光束校准设备第四实施例的结构示意图；
图9是图8中所示分光组件对P光和S光的镀膜曲线示意图；
图10本申请光束校准设备第五实施例的结构示意图；
图11本申请投影设备实施例的结构示意图；
图12本申请光束校准方法实施例的流程示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，均属于本申请保护的范围。
本申请中的术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。而术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
分光膜片、偏振转换片等光学器件的功能通常是通过镀膜实现，常见的镀膜一般是针对角度镀膜，即对同一分光膜片而言，不同的入射角的光束对应的镀膜曲线不同。如图1所示，光束入射分光膜片的入射角分别为θa、θb和θc，三个入射角之间的大小关系为θa＞θb＞θc，从图1可看出随着入射角越大的光束，其对应的镀膜曲线向短波方向偏移，三个入射角对应的截至波长分别为580nm、600nm和620nm，即分光膜片的镀膜曲线随着入射角度的增加向短波方向偏移，相应的截至波长也向短波方向偏移。当分光膜片的镀膜存在偏差时，也会导致其镀膜曲线发生偏移时，其对入射光的分光比例会随之改变，进而导致出射的光束的颜色出现偏差。
本申请提出了一种光束校准设备，该光束校准设备包括颜色校准组件、光束准直组件和分光组件。颜色校准组件用于将接收到的光束引导至光束准直组件；光束准直组件用于将颜色校准组件出射的光束汇聚至分光组件；分光组件用于接收光束准直组件出射的光束并对该光束进行分光。其中，颜色校准组件与光束准直组件之间的相对位置可调，通过调节颜色校准组件与光束准直组件之间的相对位置以调节颜色校准组件出射的光束的光轴与光束准直组件的光轴之间的位移量，进而实现对光束校准设备出射的光束的颜色校准。
请参见图2，图2是本申请提出的光束校准设备第一实施例的结构示意图。如图2所示，本实施例的光束校准设备100可包括依次设置的颜色校准组件11、光束准直组件12和分光组件13；光源组件(图中未示出)出射的光束入射至颜色校准组件11，颜色校准组件11接收该光束并将光束引导至光束准直组件12，光束准直组件12进一步将颜色校准组件11出射的光束汇聚至分光组件13，分光组件13进而对光束进行分光，分别从分光组件13的两侧出射第一分光C1和第二分光C2，图中以贯穿光束校准设备的虚线示出光束准直组件12的光轴。其中，颜色校准组件11与光束准直组件12之间的相对位置可调，进而调节颜色校准组件11出射的光束的光轴与光轴准直组件的光轴之间的位移量，进而改善光束校准设备100出射的光束的颜色，即第一分光C1和第二 分光C2的颜色。
进一步，本实施例中光束准直组件12为聚焦准直装置，在一实施例中可为由多个光学透镜构成的透镜组，其满足如下公式：H＝f*tanα。其中，H是光束准直组件12的成像物高，f是光束准直组件12的焦距，α是光束准直组件12出射的光束相对其光轴的夹角。可以理解的，当宽度为D的光束入射光束准直组件12时，若光束的光轴与光束准直组件12的光轴重合，则对于光束准直组件12来说其成像物高即为D/2；当该光束的光轴相对光束准直组件12的光轴在垂直于光束准直组件12的光轴的方向上发生偏移时即相当于改变了光束准直组件12的成像物高H，而其焦距f为固定值，则可改变tanα的值，相应改变光束准直组件12出射的光束相对其光轴的夹角α，若分光组件13的位置不变，即可改变光束准直组件12出射的光束相对分光组件13的入射角θ。本实施例通过移动位置可调的颜色校准组件11和/或光束准直组件12来调节从颜色校准组件11出射的光束相对光束准直组件12的光轴在垂直于光束准直组件12的光轴的方向上的移动，即调节颜色校准组件11出射的光束的光轴与光束准直组件12的光轴之间位移量，进而调节光束准直组件12出射的光束相对分光组件13的入射角。根据上述对分光膜片的镀膜曲线的分析可知，改变入射分光组件13的光束的入射角即相当于对其镀膜曲线的偏移状态进行调节，进而对其镀膜曲线进行校准，从而达到实现改善光束校准设备100出射的光束的颜色的目的。
对本实施例的光束颜色校准做进一步说明：
令图2所示的光束校准设备100中颜色校准组件11和光束准直组件12分别位于各自的初始位置(本实施例以颜色校准组件11出射的光束的光轴与光束准直组件12的光轴重合时两者的位置为初始位置)，此时，光束的光轴与光束准直组件12的光轴之间的位移量为零，分光组件13位于光束准直组件12之后且位置固定，光束沿图2中所示的+z方向传输，y方向为垂直光束准直组件12的光轴的竖直方向(平行于纸面)，x方向为垂直光束准直组件12的水平方向(垂直于纸面)。若光束的宽度为D，则此时光束准直组件12的成像物高即为该光束的半高 D/2；光束准直组件12将光束汇聚至分光组件13上，光束的光轴以入射角θ 0入射至分光组件13，光束的边缘光线相对于分光组件13的入射角分别为θ 1和θ 2，光束在分光组件13处基于分光组件13的镀膜曲线被分为第一光束和第二光束。图3示出了本实施例的分光组件13的镀膜曲线，其中偏向长波方向的曲线为分光组件13的理论镀膜曲线(分光组件13的镀膜满足理论分光需求时的镀膜曲线)，其对应的截至波长设为a；而在实际应用中分光组件13由于加工工艺、加工环境等影响存在镀膜误差使得其实际镀膜曲线相对理想镀膜曲线出现偏移，偏向短波方向的曲线为分光组件13的实际镀膜曲线(本实施例以实际镀膜曲线相对理想镀膜曲线向短波方向偏移为例)，其对应的截至波长设为b。由此可知，截至波长的移动导致分光组件13分光得到第一光束和第二光束的分光比例出现偏差，进而使得分光后光束的颜色出现偏差。假设a为600nm，b为580nm；理论分光后的第一光束和第二光束分别为波长大于600nm的光和波长小于600nm的光；而当实际截至波长向短波偏移而变为580nm时，由于入射角未改变，而实际截至的波长为580nm，实际分光后的第一光束和第二光束分别是波长小于580nm的光和波长大于580nm的光，第一光束和第二光束的实际分光比例相较理论分光比例发生了偏移，由于光谱的改变也导致第一光束和第二光束的颜色与理论所需的颜色存在差异。
进一步参阅图4，基于本实施例的光束校准设备100，调节颜色校准组件11与光束准直组件12之间的相对位置，令颜色校准组件11出射的光束在垂直于光束准直组件12的方向上向+y方向移动，光束的光轴相对光束准直组件12的光轴产生+y方向上的位移量s。此时，对光束准直组件12来说其成像物高H变大，相应tanα的值也随之变大，光束准直组件12出射的光束相对其光轴的夹角α变大；根据角度关系可知光束准直组件12出射的光束相对其光轴的夹角与光束入射分光组件13的入射角之和等于分光组件13的法线相对光束准直组件12的光轴的夹角的，而本实施例中分光组件13的位置不变，其法线相对于光束准直组件12的光轴的夹角不变，当光束准直组件12出射的光束相对其光轴的 夹角α变大时，即相当于令光束入射分光组件13的入射角变小。结合图4，即光束的主光轴入射分光组件13的入射角θ 3相较于图2所示的入射角θ 0减小，光束的边缘光线入射分光组件13的入射角θ 4和θ 5也相较于图2所示的入射角θ 1和θ 2减小。根据上述图1所示的分光膜片的镀膜曲线与光束的入射角的关系可知，当其入射角变小时，分光膜片的镀膜曲线向长波方向偏移。由此，即可如图3所示，通过减小分光组件13的光束的入射角使其实际镀膜曲线向理论镀膜曲线偏移；实现对分光组件13的实际镀膜曲线的校准，进而改善所述光束校准设备100所出射的光束的颜色。
此外，根据上述光束准直组件12所满足的公式可知，入射角的角度值的具体调节可通过光束的光轴相对光束准直组件12的光轴之间产生位移量s来控制，位移量s越大，入射角减小越多。
可以理解的是，本实施例中颜色校准组件11出射的光束也可在垂直于光束准直组件12的其他方向上移动，例如-y方向或x方向。需要说明的是，当颜色校准组件11出射的光束在垂直于光束准直组件12的-y方向上移动时，光束的光轴相对光束准直组件12的光轴之间产生位移量s为负值，此时对光束准直组件12来说其物高变小，相应tanα的值也随之变小，θ的值变大，此时，对分光组件13的镀膜曲线的校准为令分光组件13的实际镀膜曲线向短波方向偏移。颜色校准组件11出射的光束在垂直于光束准直组件12的其他方向上的移动与在y方向上的移动相似，此处不再赘述，其具体移动方向可根据实际光路设计和需求进行调整，本申请不做具体限制。
进一步，本实施例的光束校准设备100可基于其对分光后光束的颜色校准实现对三基色成像中三基色的本征颜色的校准，其中，本征颜色指出射的色光自身的颜色，若该光束校准设备100用于投影光机中，即指投影光机自身出射的光束颜色。若入射颜色校准组件11的光束为包括红光、绿光和蓝光的三基色光，光束校准设备100的结构同样如图2所示，图3示出了其包含的分光组件13的镀膜曲线，其中偏向长波方向的曲线为分光组件13的理论镀膜曲线，其对应的截至波长设为 600nm；偏向短波方向的曲线为分光组件13的实际镀膜曲线，其对应的截至波长设为580nm。
根据分光组件13的理论镀膜曲线，分光组件13分成的第一光束和第二光束分别为波长大于600nm的红光，以及波长小于600nm的蓝光和绿光的混合光，理论色域可如图5a所示的实线三角形所构成的理论色域。当分光组件13的实际镀膜曲线向短波方向偏移时，分光组件13分成的第一光束和第二光束分别为波长大于580nm的红光和波长小于580nm的蓝光和绿光的混合光，对蓝光而言，其波长始终小于截至波长，因此对蓝光的分光影响较小，而对分出的绿光而言相对于理论的绿光缺少了580nm至600nm范围的光，对分出的红光而言相对于理论的红光增加了580nm至600nm范围的光，而导致实际的绿光和实际的红光的色坐标均产生了偏移，本实施例以分光的红光和绿光分别为红荧光和绿荧光为例，此时如图5a所示，红荧光和绿荧光的色坐标均位于理论色域(实线三角形)内，换言之，此时分光得到红荧光、绿荧光和蓝激光所构成的色域无法覆盖理论色域。在一实施方式中，可通过在光路系统中增加相应颜色的补充激光来调整红光和绿光的色坐标，即分别增加绿激光和红激光以利用绿激光和绿荧光混合得到本征绿光，利用红激光和红荧光混合得到本征红光，由此本征红光、本征绿光和本征蓝光所构成的实际色域(粗点三角形)则能够覆盖理论色轮，但增加额外的补充激光会导致成本升高，且需要校色软件对该实际色域进行调制以得到理论色域，该调制过程会导致光损耗，令整体亮度下降；此外由于补充激光的增加还会增加光路系统的热量，不利于光路结构的散热，特别是图像调制器件(如空间光调制器等)的散热。此外，若分光组件13的镀膜曲线相对理论镀膜曲线偏移量较大，此时即使补充相应颜色的补充激光，也无法令本征红光和/或本征绿光的色坐标被校准至理论色域之外，如图5b所示，在补充了红激光的情况下本征红光的色坐标仍在理论色域的范围内，无法覆盖理论色域。
在本申请中，基于本实施例的光束校准设备100，可调整颜色校准组件11与光束准直组件12之间的相对位置，令颜色校准组件11出射的 光束在垂直于光束准直组件12的方向上向+y方向移动，光束的光轴相对光束准直组件12的光轴之间产生位移量s，令光束准直组件12的成像物高变大，进而其出射的光束入射分光组件13时的入射角θ的值变小，令其实际镀膜曲线向理论镀膜曲线偏移，进而调节分光组件13的对红光和绿光的分光比例，令红光和绿光的分光比例尽量满足理论分光比例，进而调制本征红光和本征绿光的色坐标，实现对三基色成像中三基色的本征颜色的校准。
进一步如图2和图4所示，在一实施例方式中，颜色校准组件11可为包括至少一个透镜的透镜组，光源组件的光束入射颜色校准组件11后以平行光的形式出射光束。此时可通过在垂直于光束准直组件12的光轴的方向上移动颜色校准组件11，即实现颜色校准组件11与光束准直组件12之间的相对位置的调节，进而改变颜色校准组件11出射的光束的光轴与光束准直组件12的光轴之间的相对位移。
本实施例中可对颜色校准组件11设置用于调节其位置的调节支架，该调节支架可包括x方向和y方向的调节杆、调节电机、调节齿轮、调节滑轨等多个调节机构中的一种，或多种调节机构的组合机构。
进一步，如图6a和图6b所示，在其他实施例中，颜色校准组件11还可为反射镜组件14，本实施例以两个反射镜组成的反射镜对为例，光源组件出射的光束入射至第一反射镜141，被第一反射镜141反射至第二反射镜142，进一步被第二反射镜142反射至颜色校准组件11。如图6a所示，第一反射镜141、第二反射镜142和光束准直组件12分别位于各自的初始位置，此时，第二反射镜142反射的光束的光轴与光束准直组件12的光轴重合，此时颜色校准组件11后方的光路结构与图2所示的光路结构相同，此处不再赘述。
本实施例中，可通过偏转第一反射镜141和第二反射镜142来调整第二反射镜142出射的光束的光轴与光束准直组件12的光轴之间的位移量。如图6b所示，第一反射镜141和第二反射镜142同时向-y方向偏转，此时光源组件入射第一反射镜141和第二反射镜142的光路出现偏移，最终从第二反射镜142出射的光束向+y方向移动，即在y方向上 调节了第二反射镜142出射的光束的光轴与光束准直组件12的光轴之间的位移量，由此改善光束校准设备200所出射的光束的颜色，本实施例中实现光束校准设备200所出射的光束的颜色的改善过程与上述对图2至图4所示的实施例的改善过程相同，此处不再赘述。
进一步，本实施例中第一反射镜141和第二反射镜142之间的夹角保持不变，即在转动第一反射镜141和第二反射镜142时两者是同步进行转动的。在一实施方式中，第一反射镜141和第二反射镜142之间的夹角保持90°，即第一反射镜141和第二反射镜142始终保持垂直。
在其他实施方式中反射镜组14也可包括更多个反射镜，通过设计反射镜之间的相对位置关系实现光束以平行光入射光束准直组件12即可，本申请不做具体限制。
进一步，请参阅图7a和图7b，在又一实施例中，颜色校准组件11还可为直角棱镜15，该直角棱镜15的两个直角面为两个反射面151、152，光源组件出射的光束从直角棱镜15的斜面153入射至直角棱镜15内，在第一反射面151上被反射至第二反射面152，进一步被第二反射面152反射后从其斜面153出射。如图7a所示，直角棱镜15和光束准直组件12分别位于各自的初始位置，此时，直角棱镜15出射的光束的光轴与光束准直组件12的光轴重合,此时颜色校准组件11后方的光路结构与图2所示的光路结构相同，此处不再赘述。
本实施例中，可通过偏转直角棱镜15来调整其出射的光束的光轴与光束准直组件12的光轴之间的位移量。如图7b所示，直角棱镜15向-y方向偏转，此时光源系统入射光束在直角棱镜15的第一反射面和第二反射面之间的光路出现偏移，最终从直角棱镜15出射的光束向+y方向移动，即在y方向上调节了直角棱镜15出射的光束的光轴与光束准直组件12的光轴之间的位移量，由此改善光束校准设备300所出射的光束的颜色，本实施例中实现光束校准设备300所出射的光束的颜色的改善过程与上述对图2至图4所示的实施例的改善过程相同，此处不再赘述。
图6和图7所示的光束校准设备中，可对反射镜组件14和直角棱 镜15设置用于调节其旋转角度的调节支架，该调节支架可包括旋转齿轮、调节电机、调节滑轨等多个调节机构中的一种，或多种调节机构的组合机构。
在又一实施例中，也可通过在垂直于光束准直组件12的光轴的方向上移动光束准直组件12的位置调节以调整颜色校准组件11与光束准直组件12之间的相对位置，进而改变颜色校准组件11出射的光束的光轴与光束准直组件12的光轴之间的相对位移，由此改善光束校准设备100所出射的光束的颜色，本实施例中实现光束校准设备100所出射的光束的颜色的改善过程与上述对图2至图4所示的实施例的改善过程相同，此处不再赘述。此外，若光源组件的结构简单，也可通过移动光源的位置来调整颜色校准组件11出射的光束的光轴与光束准直组件12的光轴之间的相对位移。如图6a和图7a，在垂直于光束准直组件12的光轴的方向上移动光源组件，同样可调整颜色校准组件11出射的光束的光轴与光束准直组件12的光轴之间的位移，改善光束校准设备200、300所出射的光束的颜色。
进一步，请参阅图8，图8是本申请光束校准设备又一实施例的结构示意图。如图8所示，本实施例的光束校准设备400在图2所示的光束校准设备100的基础上，还可包括偏振转换器16，偏振转换器16设置在颜色校准组件11和光束准直组件12之间，用于接收颜色校准组件11出射的光束，并将光束的偏振态进行调制，将光束转换为单一偏振态的光束出射。光束准直组件12和分光组件13与图1至图7所示的实施例中的光束准直组件12和分光组件13相同，此处不再赘述。
本实施例中，偏振转换器16的功能是通过镀膜实现的，与分光组件13相似，同样会存在一定镀膜误差，导致偏振转换器16无法将入射的光束完全转换为单一偏振态的光束，此时由于分光组件13对P偏振态的P光和S偏振态的S光的镀膜曲线存在一定差异，如图9所示，当入射的光既有P光和S光时，分光组件13对光束的实际镀膜曲线位于P光镀膜曲线和S光镀膜曲线之间。若所需的为S光，则实际镀膜曲线相对S光镀膜曲线向短波方向偏移；若所需的为P光，则实际镀膜曲线相 对P光镀膜曲线向长波方向偏移。此时，可通过改变颜色校准组件11与光束准直组件12之间的相对位置，调节颜色校准组件11出射的光束的光轴与光束准直组件12的光轴之间的位移量，进而令实际镀膜曲线向理论镀膜曲线进行校准，，改善光束校准设备400所出射的光束的颜色。
进一步，请参阅图10，图10是本申请光束校准设备再一实施例的结构示意图。如图10所示，本实施例的光束校准设备500在图8所示的光束校准设备400的基础上，还可包括匀光组件17，匀光组件17设置在颜色校准组件11和光束准直组件12之间，用于接收颜色校准组件11出射的光束并对该光束进行匀化处理，以使入射光束准直组件12的光束为面分布均匀的光束。本实施例中，匀光组件17可为复眼透镜对，包括第一复眼透镜171和第二复眼透镜172，其中，第一复眼透镜171位于第二复眼透镜172的有效焦距上，此时第一复眼透镜171上的光束面分布会成像在无穷远处。
在其他实施方式中匀光组件17也可为匀光棒等其他匀光器件，本申请不做具体限制。
可以理解的是，图9所示的偏振转换器16和/或图10中匀光组件17也可设置在图6至图7所示的光束校准设备100中。
进一步如图11所示，本申请还提出一种投影设备，该投影设备600包括光源组件110、光束校准设备120和空间光调制器130；光源组件110提供用于照明光；光束校准设备120用于接收照明光，对照明光进行校准后引导至空间光调制器130；空间光调制器130对照明光进行调制形成图像光投射至投影平面。
本实施例中，光束校准设备120可为上述图2至图10所示的任意一实施例的光束校准设备。
光源组件110可为荧光光源和激光光源组成的混合光源，荧光光源用于提供宽谱荧光，以在光束校准设备的分光组件处被分为波长范围不同的包含基色光谱的两种基色荧光，激光光源则用于提供第三种基色光。三种基色光分别被引导至空间光调制器130进行图像光调制形成图 像光。
在一实施方式中，分光组件如图2至图10所示将光束分为第一光束C1和第二光束C2，则对应空间光调制器130可设置为双空间光调制器，两个空间光调制器分别对第一光束C1和第二光束C2进行调制。在另一实施方式中，可对蓝光和绿光的混合光进一步分光，相应的空间光调制器130可设置为三空间光调制器，三个空间光调制器分别对三种基色光进行调制。
本实施例的投影设备600可利用光束校准设备120对分光后入射至空间光调制器130的光束的本征颜色进行校准，进而校准光束的实际色域；此外，可避免软件调制时造成的光损耗，提高图像亮度。同时，可减弱投影设备对补充激光的依赖性，更利于投影设备散热，且降低成本。
进一步，如图12所示，本申请还提出一种光束校准方法，该方法包括：
在步骤S1中，提供颜色校准组件，以接收光束并将光束引导至光束准直组件；
在步骤S2中，利用光束准直组件将光束汇聚至分光组件进行分光；
在步骤S3中，调整颜色校准组件与光束准直组件之间的相对位置，以在垂直于光束准直组件的光轴的方向上，使颜色校准组件所出射的光束产生位移量，进而改善分光组件出射的光束的颜色。
本实施例的光束校准方法可应用于图2至图10所示的光束校准设备，或应用于图11所示的投影设备。
以上所述仅为本申请的实施方式，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (11)

  1. 一种光束校准设备，其特征在于，包括依次设置的颜色校准组件、光束准直组件和分光组件：
    颜色校准组件，用于接收光束并将所述光束引导至所述光束准直组件；
    所述光束准直组件，用于将所述颜色校准组件出射的光束汇聚至所述分光组件；
    所述分光组件用于接收所述光束并对所述光束进行分光；
    其中，所述颜色校准组件与所述光束准直组件之间的相对位置可调，调节所述颜色校准组件出射的光束的光轴与所述光束准直组件的光轴之间的位移量，进而改善所述光束校准设备所出射的光束的颜色。
  2. 根据权利要求1所述的光束校准设备，其特征在于，所述颜色校准组件为透镜组件；
    所述透镜组件相对所述光束准直组件在垂直于所述光束准直组件的光轴的方向上位置可调，以调节其出射的光束的光轴与所述光束准直组件的光轴之间的位移量，进而改善所述光束校准设备所出射的光束的颜色。
  3. 根据权利要求1所述的光束校准设备，其特征在于，所述颜色校准组件为反射镜组件；
    所述反射镜组件相对所述光束准直组件可偏转调节，以调节其出射的光束的光轴与所述光束准直组件的光轴之间的位移量，进而改善所述光束校准设备所出射的光束的颜色。
  4. 根据权利要求1所述的光束校准设备，其特征在于，所述颜色校准组件为直角棱镜；
    所述直角棱镜相对所述光束准直组件可偏转调节，以调节其出射的光束的光轴与所述光束准直组件的光轴之间的位移量，进而改善所述光束校准设备所出射的光束的颜色。
  5. 根据权利要求1所述的光束校准设备，其特征在于，所述颜色校 准组件出射的光束为平行光束。
  6. 根据权利要求1所述的光束校准设备，其特征在于，所述光源设备还包括偏振转换器件；
    所述偏振转换器件位于所述颜色校准组件与所述光束准直组件之间，用于对所述光束进行偏振转换。
  7. 根据权利要求1所述的光束校准设备，其特征在于，所述光源设备还包括匀光组件；
    所述匀光组件位于所述颜色校准组件与所述光束准直组件之间，用于对所述光束进行匀光处理。
  8. 根据权利要求7所述的光束校准设备，其特征在于，所述匀光器件为复眼透镜对。
  9. 一种投影设备，其特征在于，包括光源组件、光束校准设备和空间光调制器；
    所述光源组件提供用于照明光；
    所述光束校准设备用于接收所述照明光，对所述照明光进行校准后引导至所述空间光调制器；
    所述空间光调制器对所述照明光进行调制形成图像光投射至投影平面；
    其中，所述光束校准设备为权1-8任意一项所述的光束校准设备。
  10. 一种光束校准方法，其特征在于，包括：
    提供颜色校准组件，以接收光束并将所述光束引导至光束准直组件；
    利用所述光束准直组件将所述光束汇聚至分光组件进行分光；
    调整所述颜色校准组件与所述光束准直组件之间的相对位置，以在垂直于所述光束准直组件的光轴的方向上，使所述颜色校准组件所出射的光束产生位移量，进而改善所述分光组件出射的光束的颜色。
  11. 根据权利要求10所述的光束校准方法，其特征在于，所述光束校准方法应用于权1-8任意一项所述的光束校准设备。
PCT/CN2020/137082 2019-12-20 2020-12-17 一种光束校准设备、投影设备及光束校准方法 WO2021121301A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1924696A (zh) * 2005-09-01 2007-03-07 精工爱普生株式会社 投影机
JP2008209888A (ja) * 2007-01-31 2008-09-11 Sony Corp 光学装置および投射型表示装置
CN203982065U (zh) * 2014-08-15 2014-12-03 广景科技有限公司 Dlp 微型投影机
CN104570567A (zh) * 2013-10-23 2015-04-29 佳能株式会社 光源单元以及投射型显示设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001209140A (ja) * 2000-01-26 2001-08-03 Seiko Epson Corp プロジェクタ及びこれに用いられる光学装置
JP2007025308A (ja) * 2005-07-19 2007-02-01 Hitachi Ltd 投射型映像表示装置および色分離ユニット
JP2008058558A (ja) * 2006-08-31 2008-03-13 Hitachi Ltd 投射型映像表示装置
JP2009186704A (ja) * 2008-02-06 2009-08-20 Seiko Epson Corp 画像表示装置及びプロジェクタ
JP5807430B2 (ja) * 2011-08-02 2015-11-10 セイコーエプソン株式会社 プロジェクター

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1924696A (zh) * 2005-09-01 2007-03-07 精工爱普生株式会社 投影机
JP2008209888A (ja) * 2007-01-31 2008-09-11 Sony Corp 光学装置および投射型表示装置
CN104570567A (zh) * 2013-10-23 2015-04-29 佳能株式会社 光源单元以及投射型显示设备
CN203982065U (zh) * 2014-08-15 2014-12-03 广景科技有限公司 Dlp 微型投影机

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