An intelligent projector optical system based on immersive experience
Patent Information
- Application Number
- CN202611397273.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-09
- Publication Date
- 2026-10-20
Smart Images
Figure FT_1 
Figure SMS_1 
Figure SMS_8
Abstract
Description
Technical Field
[0001] This invention relates to the field of projector optical display technology, and more particularly to an intelligent projector optical system based on immersive experience. Background Technology
[0002] With the rapid growth in demand for immersive displays, projectors, with their advantages of flexible and adjustable display size, low space occupation, and adaptability to various scenarios, have been widely used in diverse settings such as home theaters, office meetings, and professional audio-visual rooms. In practical applications, projectors are mostly installed near the corner where the wall and floor meet. This installation method maximizes space utilization and ensures image integrity, making it the most mainstream application. However, the corner installation method commonly used in these scenarios means that the light emitted from the projector's exit pupil must propagate within the vertical space formed by the wall and floor. Some light rays will propagate in a direction close to the bisector of the angle formed by the wall and floor. This type of light is very likely to undergo an initial reflection with the wall or floor, and the light rays, after changing their path, will then undergo a second reflection with another surface, thus interfering with the normal display of the projected image. This potential light reflection problem has become a key factor affecting the projector's display effect.
[0003] Current technical solutions typically reduce the intensity of the projector's emitted light to decrease the energy of reflected light and thus mitigate the effect of ghosting. However, this approach simultaneously reduces the brightness of the main field of view, resulting in an overall dim image. Especially in bright office or home environments, insufficient brightness in the main field of view directly affects the clarity of text and images, severely damaging the viewing experience. Alternatively, traditional light shields or ordinary aperture structures can be used to physically block potentially reflected light. However, such structures cannot accurately identify and lock onto the specific light propagation range that is prone to forming ghosting. If the blocking range is too small, it cannot effectively intercept light that has been reflected twice by the wall and floor, and the ghosting problem still exists. If the blocking range is too large, it may mistakenly block the normal light that should be projected onto the main field of view, causing a sharp drop in brightness at the edges of the image, the appearance of dark corners, and exacerbating uneven brightness, making it difficult to meet the user's core need for an immersive image. Summary of the Invention
[0004] The purpose of this invention is to solve the problem in the prior art where, in corner installation scenarios where projectors are installed on a wall and the ground, some of the emitted light rays are reflected twice by the wall and the ground, forming shadows, which leads to abnormal brightness and reduced uniformity of the projected image, thereby destroying the immersive display effect. The invention proposes an intelligent projector optical system based on immersive experience.
[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: An optical system for a smart projector based on an immersive experience, comprising: The orientation geometry module is used to set the exit pupil direction vector and the relative angle of the system as the vectors, and obtain the orientation geometry criterion based on the combination of the exit pupil direction vector and the relative angle of the system. The shadow intensity module is used to construct the causal angle domain based on the directional geometry criterion, calculate the shadow intensity cost within the causal angle domain, construct the angular spectrum transmittance function containing the groove half-width parameter and the groove depth parameter, and shape the shadow intensity cost. The attenuation adjustment module is used to perform directional attenuation adjustment on the intensity cost of the shaped shadow, and to determine the adjusted groove half-width parameters and groove depth parameters; The deflection adjustment module is used to set the angle deflection amount and angle deflection direction, and to adjust the direction of light rays based on the angle deflection amount and angle deflection direction; The compliance determination module is used to determine whether the standard is met based on the adjusted measured indicators, and to fix the groove half-width parameter, groove depth parameter, angle deflection amount and angle deflection direction according to the determination result.
[0006] Preferably, the exit pupil direction vector and the relative angle vector of the system are set, and the orientation geometric criterion is obtained by combining the exit pupil direction vector and the relative angle vector of the system, including: Establish a three-dimensional rectangular coordinate system at the exit pupil position of the projector, and take the light emission direction of the exit pupil as the exit pupil direction vector; The direction of the exit pupil is set to be within the half-space on one side of the projection screen; Define the relative angle vector of the system. The relative angle vector is the unit normal component of the angle bisector formed by the wall and the ground in the projector installation scene in the horizontal projection plane of the three-dimensional rectangular coordinate system. An antisymmetric bilinear combination of the system's relative corner vector and exit pupil direction vector yields the orientation geometric criterion.
[0007] Preferably, a causative angle domain is constructed based on the orientation geometry criterion, and the shadow intensity cost is calculated within the causative angle domain, including: The causal angle domain is the set of directions corresponding to all exit pupil direction vectors whose orientation geometric criterion is not greater than a preset criterion threshold; Within the causal angle domain, the exit pupil angle intensity distribution is obtained by measuring the spatial light intensity of the projection system using a radiometric photometer. Obtain the wall reflection function and ground reflection function from the material reflection parameter database; Determine the geometric coupling function based on the installed geometric parameters; A local energy density function is constructed based on the exit pupil angle intensity distribution, wall reflection function, ground reflection function, and geometric coupling function. Within the causal angle domain, the local energy density function is integrated to obtain the shadow intensity cost.
[0008] Preferably, an angular spectrum transmittance function with a groove half-width parameter and a groove depth parameter is constructed, and a penumbra intensity cost is shaped, comprising: An angular spectrum transmittance function is constructed with a directional geometric criterion as an independent variable, the angular spectrum transmittance function is a Gaussian directional groove transmittance function, and the function is uniquely characterized by a groove depth parameter and a groove half-width parameter; In a cause angle domain, a penumbra intensity cost shaped by the angular spectrum transmittance function is calculated with a local energy density function as a weight.
[0009] Preferably, the shaped penumbra intensity cost is adjusted for directional attenuation, and adjusted groove half-width parameters and groove depth parameters are determined, comprising: An average illumination of a main field of view of the projector is calculated; A quantitative constraint standard is obtained according to a product of the average illumination and a preset index threshold; The groove half-width parameter and the groove depth parameter in the angular spectrum transmittance function are adjusted to reduce the energy of light outside the main field of view angle domain of the projector and limit the penumbra intensity cost to be lower than the quantitative constraint standard.
[0010] Preferably, an angle deflection amount and an angle deflection direction are set, and the light direction is adjusted based on the angle deflection amount and the angle deflection direction, comprising: A domain selection mask function is constructed based on the angular spectrum transmittance function, and the domain selection mask function is a subtraction of the angular spectrum transmittance function; The angle deflection direction is set as a direction of an orthogonal rotation of an orientation vector of a system relative corner in a horizontal plane of an exit pupil coordinate system; The angle deflection amount is calculated according to a material refractive index of a micro-lens array and a micro-lens array vertex angle, and the angle deflection amount is set to be not less than the adjusted groove half-width parameter and not more than a preset distortion threshold; In the cause angle domain, the light direction with a positive domain selection mask function value is adjusted based on the angle deflection direction and the angle deflection amount.
[0011] Preferably, whether a standard is met is determined based on the adjusted measured index, and the groove half-width parameter, the groove depth parameter, the angle deflection amount, and the angle deflection direction are fixed according to a determination result, comprising: An installation rotation angle is calculated according to an orientation vector of a system relative corner, and an optical assembly is aligned based on the installation rotation angle; If the adjusted measured index meets a set condition, it is determined that the standard is met and the groove half-width parameter, the groove depth parameter, the installation rotation angle, the angle deflection direction, and the angle deflection amount are fixed; otherwise, it is determined that the standard is not met, and the parameters are adjusted and the optical assembly is aligned again; The set condition is that the brightness peak in the adjusted cause angle domain is less than a preset brightness peak, and the difference between the maximum brightness and the minimum brightness of the projection picture is less than a preset brightness difference threshold.
[0012] Compared with the prior art, the present application has the following beneficial effects: 1. The present application can accurately lock the light propagation range of the penumbra easily formed in the wall-ground corner installation scene to construct the cause angle domain by setting the directional geometric criterion obtained by the combination of the out-pupil direction vector and the system relative corner orientation vector, so as to avoid misidentification of the normal light in the main field of view; the penumbra intensity cost in the cause angle domain is calculated to quantify the total energy of the penumbra, and the angle spectrum transmittance function containing the groove parameters is constructed to reshape the cost, the groove parameters are adjusted by directional attenuation to reduce the light energy in the cause angle domain, the deflection direction and the deflection amount are set to adjust the propagation path of the penumbra light, and finally whether the standard is met is determined according to the measured index and the parameters are fixed, so as to realize the targeted suppression of the penumbra, effectively solve the problem that the light forms a penumbra by double deflection when the projector is installed at the wall-ground corner, and destroys the immersive display, and the main field of view light is not excessively affected throughout the process, so as to ensure the brightness and display quality of the main field of view.
[0013] 2. The present application constructs the directional geometric criterion by anti-symmetrical bilinear combination, focuses on the component operation of the out-pupil direction vector and the system relative corner orientation vector in the horizontal projection plane, excludes the interference of the vertical component, so that the cause angle domain division is more accurate; the local energy density function is constructed based on the out-pupil angle intensity distribution, the wall-ground reflection function and the geometric coupling function, so as to accurately quantify the penumbra energy contribution of the unit angle domain in the cause angle domain, and provide a reliable basis for the penumbra intensity cost calculation; and the reshaped penumbra intensity cost is calculated by taking the local energy density function as the weight, so as to ensure that the energy reshaping effect matches the actual penumbra distribution, and improve the penumbra suppression precision.
[0014] 3. The present application calculates the installation rotation angle based on the system relative corner orientation vector and aligns the optical components, so as to adapt to the spatial differences of different wall-ground corner installation scenes, without the need to redesign the optical structure for different scenes, so as to improve the system versatility; at the same time, the angle deflection amount is set to be not less than the groove half-width parameter and not more than the distortion threshold, so as to ensure that the penumbra light completely deviates from the cause angle domain, and avoid picture distortion caused by excessive deflection of the light; in addition, the penumbra intensity can be controlled in the range that cannot be perceived by the human eye through the quantitative constraint standard and the measured index determination mechanism, so as to ensure the uniformity of the projection picture brightness and improve the immersive display effect of the projector. BRIEF DESCRIPTION OF DRAWINGS
[0015] The drawings described herein are used to provide further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1A functional module diagram of an optical system of an intelligent projector based on an immersive experience is provided for an embodiment of the present application. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments.
[0017] Embodiment: The embodiment provides an optical system of an intelligent projector based on an immersive experience, referring to Figure 1 , specifically, comprising: A directional geometry module is configured to set an exit pupil direction vector and a system relative corner orientation vector, and obtain a directional geometry criterion according to the combination of the exit pupil direction vector and the system relative corner orientation vector. In the embodiment of the present application, the exit pupil direction vector and the system relative corner orientation vector are set, and the directional geometry criterion is obtained according to the combination of the exit pupil direction vector and the system relative corner orientation vector, comprising: A three-dimensional rectangular coordinate system is established at the exit pupil position of the projector, and the light emission direction of the exit pupil is taken as the exit pupil direction vector. The pointing direction of the exit pupil direction vector is located in the half space on one side of the projection screen. Specifically, the exit pupil position of the projector is a virtual vertex at which all the emitted light rays of the optical system of the projector present a divergent state, and the position is determined by the optical path design of the core optical components such as the lens group and the mirror group in the projector. The position usually maintains a fixed geometric distance with the reference end surface of the lens of the projector. The position is a key node for connecting the internal optical path of the projector and the external projection optical path, and is also a core reference point for subsequent angle domain range division and optical parameter calculation of the light propagation direction determination. The exit pupil direction vector is a three-dimensional vector for accurately describing the spatial propagation direction of a single light ray emitted from the exit pupil position of the projector. The vector direction is completely consistent with the actual propagation path of the corresponding light ray. The vector components need to form a corresponding relationship with the coordinate axes of the three-dimensional rectangular coordinate system preset at the exit pupil position. The vector can clearly define the spatial position of a single light ray relative to the wall-ground rectangular scene and the projection screen. It is the core basis for constructing the directional geometry criterion to screen the shadow light causing double return, and further dividing the cause angle domain. It also provides a key directional reference basis for subsequent angle spectrum transmittance function construction and light deflection direction setting.
[0018] Specifically, in the initial stage of performing the causation angle domain geometric positioning, the establishment reference and position of the three-dimensional rectangular coordinate system are determined first, and the origin of the three-dimensional rectangular coordinate system is fixed at the geometric center of the projection out-pupil to ensure the accurate association of the coordinate system with the core exit end of the projection optical system; wherein the x-axis of the coordinate system is arranged horizontally parallel to the ground to represent the horizontal dimension extending along the ground, the y-axis is arranged vertically parallel to the wall to represent the vertical dimension extending along the wall, and the z-axis is arranged along the main optical axis direction of the projector to represent the axial dimension of the light along the projection direction, and the x-axis, y-axis and z-axis are perpendicular to each other to form a three-dimensional rectangular coordinate system in accordance with the right-hand rule. After the above coordinate system is established, the propagation direction of each light ray emitted from the projection out-pupil is defined as the corresponding out-pupil direction vector, which is a three-dimensional vector with vector components corresponding to the x-axis, y-axis and z-axis of the three-dimensional rectangular coordinate system respectively, for accurately describing the spatial propagation direction of a single light ray after it is emitted from the out-pupil. At the same time, in order to ensure that all out-pupil direction vectors point to the effective projection area, the spatial direction of the out-pupil direction vector needs to be limited so that the direction of all out-pupil direction vectors is located in the half-space on one side of the projection screen, which is bounded by a plane perpendicular to the main optical axis of the projector (i.e. the aforementioned z-axis of the coordinate system), and the projection screen is fixedly arranged in the half-space. Through the limitation, the invalid light direction towards the non-projection screen area can be excluded, ensuring that only the effective projection light is selected based on the out-pupil direction vector in the subsequent causation angle domain screening, avoiding the interference of invalid direction light on the calculation related to the shadow suppression, and ensuring the accuracy and effectiveness of the causation angle domain positioning.
[0019] The orientation vector of the relative corner of the system is set, which is the angle bisector formed by the wall and the ground in the projection installation scene, and the unit normal component in the horizontal projection plane of the three-dimensional rectangular coordinate system; Specifically, the orientation vector of the system relative to the corner is a unit vector used to represent the orientation of the angle bisector plane formed by the wall and the ground in the horizontal direction in the projector installation scene. When setting the orientation vector of the system relative to the corner, first, the corner position formed by the wall and the ground in the projector installation scene needs to be determined. The corner is a right-angled region formed by the intersection of the vertical surface of the wall and the horizontal surface of the ground, and the intersection line is the common edge of the two. Based on the corner, the angle bisector plane formed by the wall and the ground is constructed. The angle bisector plane is a plane that bisects the 90-degree angle between the wall and the ground, i.e., the angle between the plane and the wall surface is 45 degrees, and the angle between the plane and the ground is also 45 degrees, and the plane contains the intersection line of the wall and the ground. Then, a three-dimensional rectangular coordinate system preset at the exit pupil position of the projector is retrieved, wherein the x-axis is parallel to the ground in the horizontal direction, the y-axis is parallel to the wall surface in the vertical direction, the z-axis is along the main optical axis direction of the projector, the three axes are perpendicular to each other and comply with the right-hand rule, the horizontal projection plane of the coordinate system is the plane where the x-axis and the z-axis are located, and the plane is parallel to the ground and contains the x-axis and the z-axis. After that, the normal component of the aforementioned angle bisector plane in the horizontal projection plane is solved. Specifically, first, the spatial normal vector of the angle bisector plane is determined, then the normal vector is orthogonally projected onto the horizontal projection plane (x-z plane) to obtain a projection vector that only has components in the x-axis and z-axis directions, and finally the projection vector is normalized to make its length 1. The unit vector obtained in this way is the orientation vector of the system relative to the corner. The vector can accurately represent the orientation of the angle bisector plane of the wall and the ground in the horizontal projection plane, and provides a key scene geometry reference for the construction of subsequent directional geometric criteria.
[0020] The orientation vector of the system relative to the corner and the exit pupil direction vector are anti-symmetric bilinearly combined to obtain a directional geometric criterion. Specifically, when the directional geometric criterion is obtained by anti-symmetric bilinear combination of the orientation vector of the system relative corner and the exit pupil direction vector, firstly, the orientation vector of the system relative corner and the exit pupil direction vector determined previously are called, wherein the orientation vector of the system relative corner is a unit vector containing only the horizontal projection plane component of the three-dimensional rectangular coordinate system, and the components correspond to the horizontal axis and the axial direction of the coordinate system; the exit pupil direction vector is a three-dimensional vector, and the components correspond to the horizontal axis, the vertical axis and the axial direction of the coordinate system, and both are established based on the three-dimensional rectangular coordinate system preset at the exit pupil position of the projector to ensure the uniformity of the combination calculation. Then the calculation logic of the anti-symmetric bilinear combination is determined, because the orientation vector of the system relative corner only involves the orientation in the horizontal projection plane, the corresponding components of the two vectors in the horizontal projection plane are focused during the combination calculation, that is, the horizontal axis component and the axial component of the orientation vector of the system relative corner, and the horizontal axis component and the axial component of the exit pupil direction vector are selected for operation, and the vertical axis component of the exit pupil direction vector is excluded to interfere with the horizontal direction angle domain determination. Subsequently, the calculation is carried out according to the anti-symmetric bilinear operation rule, the horizontal axis component of the orientation vector of the system relative corner is multiplied by the axial component of the exit pupil direction vector, and then the product of the axial component of the orientation vector of the system relative corner and the horizontal axis component of the exit pupil direction vector is subtracted, and the scalar result representing the relative orientation relationship of the two vectors is obtained through the operation. Finally, the scalar result is determined as the directional geometric criterion, which can accurately filter out the vector relationship corresponding to the light rays propagating along the wall and the ground angle bisector direction and prone to form penumbra by double reflection, and provide the core quantitative determination basis for the accurate division of the cause angle domain. The light rays of the penumbra refer to the light rays that are emitted from the exit pupil of the projector, double-reflected by the wall and the ground in the installation scene during the propagation process, finally reach the projection picture or the observation area, and cause the brightness anomaly (such as local dimming, blurred or ghosted junction of light and shade) in the area.
[0021] The penumbra intensity module is configured to construct a cause angle domain based on the directional geometric criterion, calculate a penumbra intensity cost in the cause angle domain, construct an angular spectrum transmittance function containing a groove half-width parameter and a groove depth parameter, and reshape the penumbra intensity cost. In the embodiment of the present application, the cause angle domain is constructed based on the directional geometric criterion, the penumbra intensity cost is calculated in the cause angle domain, the angular spectrum transmittance function containing the groove half-width parameter and the groove depth parameter is constructed, and the penumbra intensity cost is reshaped, which includes: The cause angle domain is a direction set corresponding to all exit pupil direction vectors whose directional geometric criterion is not greater than a preset criterion threshold. Specifically, the cause angle domain is a set of directions in the projector optical system for accurately locking the specific light propagation range prone to ghosting, which is jointly constituted by the spatial propagation directions corresponding to all the exit pupil direction vectors meeting the directional geometric criterion screening condition; when determining the cause angle domain, firstly, all the directional geometric criteria corresponding to the exit pupil direction vectors obtained through the antisymmetric bilinear combination are called, and the criterion threshold preset in the projector optical system control module is also called, which is a positive scalar determined by combining the projector installation allowed deviation and the ghost suppression accuracy required by immersive display, and its value needs to ensure that it can accurately circumscribe the angle domain corresponding to the light prone to ghosting, and also ensure that it will not miss the key cause light due to too small value or include too many invalid lights due to too large value. Then, taking the three-dimensional rectangular coordinate system preset at the position of the projector exit pupil as the unified reference, the exit pupil direction vector corresponding to each valid light ray emitted from the exit pupil and its matched directional geometric criterion are extracted one by one, wherein the valid light ray is the light ray pointing to the side half space where the projection screen is located, so as to exclude the invalid light rays in the non-projection area from interfering with the division of the cause angle domain. Then, the directional geometric criterion corresponding to each exit pupil direction vector is compared with the preset criterion threshold one by one, and all the exit pupil direction vectors with the directional geometric criterion value not greater than the criterion threshold are retained. Finally, the spatial propagation directions corresponding to all the retained exit pupil direction vectors are integrated to form a complete direction set, which is the cause angle domain. The cause angle domain divided through this step can accurately lock the light propagation range prone to double return and thus form ghosting, and provides an accurate range of action objects for subsequent calculation of ghost intensity cost in a specific area and implementation of targeted ghost suppression operation.
[0022] In the cause angle domain, the exit pupil angular intensity distribution is obtained based on the spatial light intensity measurement of the projection system by the distribution photometer; The wall reflection function and the ground reflection function are obtained from the material reflection parameter database; The geometric coupling function is determined based on the installation geometric parameters; Specifically, when obtaining the exit pupil angular intensity distribution in the cause angle domain, the detection end of the distribution photometer is aligned with the position of the projector exit pupil and fixed, and the measurement angle range of the photometer is adjusted to completely cover the spatial directions corresponding to all the exit pupil direction vectors included in the cause angle domain, so as to ensure that the measurement range is consistent with the boundary of the cause angle domain; then the projector is started to be in a stable working state, the distribution photometer is controlled to measure the spatial light intensity of each exit direction in the cause angle domain at a preset angle interval, the light intensity values in each direction are recorded, and these light intensity values are associated and integrated with the corresponding exit pupil direction vectors to form the exit pupil angular intensity distribution representing the intensity distribution of different directions in the cause angle domain.
[0023] Specifically, in the process of obtaining the wall reflection function and the ground reflection function, the material type of the wall and the ground in the installation scene of the projector is determined first, including the material surface roughness and color and other characteristics; then the material reflection parameter database pre-stored in the system is called, which stores the reflection characteristic data of various common building materials under different incident angles and different light wavelengths, and the corresponding reflection function is matched and extracted from the database according to the actual material type of the wall and the ground, wherein the wall reflection function is used to describe the change relationship of the reflection ability of the wall material to the incident light with the incident angle and other parameters, and the ground reflection function is used to describe the same reflection characteristics of the ground material.
[0024] Specifically, the installation geometry parameters of the projector are collected first, including the vertical distance from the projection pupil to the wall, the vertical distance from the projection pupil to the ground, the inclination angle with the vertical direction and the deflection angle with the horizontal direction when the projector is installed; based on these parameters, the spatial path model of the light from the projection pupil to the observation point after reflection on the wall or the ground is established, and the geometric coupling function is constructed by calculating the influence of the propagation distance, the incident angle and the reflection angle of the light in the path on the energy transfer, which is used to represent the quantitative relationship between the installation geometry factors and the energy transfer efficiency of the light reflected on the wall and the ground in the cause angle domain.
[0025] Based on the pupil angular intensity distribution, the wall reflection function, the ground reflection function and the geometric coupling function, the local energy density function is constructed; The local energy density function is: In the formula, is the local energy density function, is the pupil angular intensity distribution, is the wall reflection function, is the ground reflection function, is the geometric coupling function, is the pupil direction vector; Specifically, the construction of the local energy density function follows the physical law of optical energy propagation and reflection, wherein the exit pupil angular intensity distribution reflects the initial intensity of the light rays in the projection direction of the exit pupil, which is the source of the penumbra energy; the wall reflection function and the ground reflection function respectively describe the reflection ability of the wall and ground materials to the incident angle light rays, and the sum of the two is the cause of the penumbra that can be reflected by the wall or the ground in the cause angle domain, and the reflection contributions of the two need to be integrated; the geometric coupling function quantifies the influence of the installation geometry parameters (such as propagation distance, angle) on the light energy transfer efficiency. Since the transfer of optical energy is the accumulation of the effects of each link, the product operation of the exit pupil angular intensity distribution, the combined contribution of the wall and ground reflection functions, and the geometric coupling function can accurately represent the local energy density in the unit angle domain in the exit pupil direction, which is reflected by the wall or the ground and affected by the geometry propagation, providing a precise energy quantification basis for the calculation of the penumbra intensity cost.
[0026] In the cause angle domain, the local energy density function is integrated to obtain the penumbra intensity cost; Specifically, the penumbra intensity cost is a parameter for quantifying the total energy of all light rays in the cause angle domain of the projector that can form a penumbra; when integrating the local energy density function in the cause angle domain to obtain the penumbra intensity cost, the integration range is strictly limited to the cause angle domain, which is the spatial angle set corresponding to all exit pupil direction vectors with a directional geometric criterion less than a preset criterion threshold, ensuring that the integration is only for light directions that can produce a penumbra. The previously constructed local energy density function is called, which includes the product relationship of the exit pupil angular intensity distribution, the wall reflection function, the ground reflection function, and the geometric coupling function, and can quantify the penumbra energy contribution of the unit angle domain in the cause angle domain. The integration variable is determined as the spatial angle parameter corresponding to the exit pupil direction vector, including the azimuth angle and the polar angle, which together describe the propagation direction of the light in three-dimensional space and are consistent with the preset three-dimensional rectangular coordinate system. A numerical integration method is used to integrate the local energy density function in the cause angle domain, specifically, the cause angle domain is discretized into a number of small angle units according to a preset angle interval, wherein the preset angle interval can refer to the error threshold of brightness uniformity in the projection industry, so that the error of the integration result is controlled within the range that does not affect the human eye's perception of the penumbra, and the angle interval is selected within 0.1 to 1 degrees, which ensures that the integration result can accurately reflect the total penumbra energy in the cause angle domain, and also ensures that the calculation process is efficient and feasible; the local energy density function value corresponding to each small angle unit is calculated, and then the value is multiplied by the solid angle of the small angle unit to obtain the unit energy contribution, and finally the energy contributions of all small angle units are added up, and the sum is the penumbra intensity cost. The penumbra intensity cost quantifies the total energy of all light rays in the cause angle domain that can form a penumbra by wall or ground reflection, providing a key energy benchmark for subsequent design of the parameter of the angular spectrum groove diaphragm and evaluation of the penumbra suppression effect.
[0027] The directional geometric criterion is taken as an independent variable to construct an angular spectrum transmittance function, the angular spectrum transmittance function is a Gaussian directional groove transmittance function, and the function is uniquely characterized by a groove depth parameter and a groove half-width parameter; The angular spectrum transmittance function is: In the formula, The angular spectrum transmittance function is, The directional geometric criterion is, The groove depth parameter is used for controlling the degree of reduction of light energy in the cause angle domain, The groove half-width parameter is used for limiting the angular domain range of the energy reduction action; Specifically, the function adopts a form of 1 minus a Gaussian attenuation term, wherein 1 represents an initial state of no reduction of light energy, and the subtracted part is the energy reduction amount for the cause angle domain. The directional geometric criterion is used for accurately positioning the cause angle domain, and the Gaussian function has a form of high in the center and low at the edge, and can realize key energy reduction of the center region of the cause angle domain, and smoothly transition to the edge, so as to avoid interference of energy mutation on the main visual field light; the groove depth parameter (value range zero to one) controls the amplitude of energy reduction, and the greater the groove depth parameter is, the more significant the reduction of light energy in the cause angle domain is; the groove half-width parameter limits the angular domain range of the energy reduction action, and the greater the groove half-width parameter is, the wider the cause angle domain affected by the reduction is. This design realizes targeted inhibition of penumbra energy of the cause angle domain by the combination of the directional geometric criterion and the Gaussian distribution, and guarantees normal propagation of the projection light in the main visual field and display quality by virtue of the smooth mathematical form that matches the characteristics of the optical element for light energy modulation, so as to provide a quantifiable and controllable optical energy attenuation model for subsequent accurate shaping of the penumbra intensity.
[0028] In the cause angle domain, the penumbra intensity cost after shaping by the angular spectrum transmittance function is calculated by taking the local energy density function as a weight; Specifically, when calculating the ghost intensity cost after the shaping of the angular spectrum transmittance function in the causation angle domain, first of all, the calculation range is strictly limited to the causation angle domain, which is the spatial angle set corresponding to all pupil direction vectors with a directional geometric criterion less than or equal to a preset criterion threshold, ensuring that the calculation is only for the target light direction that needs to be suppressed. Then the previously constructed local energy density function and angular spectrum transmittance function are called, where the local energy density function is used to represent the ghost energy contribution per unit angle domain in the causation angle domain, and the angular spectrum transmittance function is used to directionally reduce the light energy in the causation angle domain. Both are established based on the spatial angle parameters (azimuth angle and polar angle) corresponding to the pupil direction vector and are consistent with the preset three-dimensional rectangular coordinate system. The local energy density function is weighted because the ghost energy background contribution of different angle units is different, and after weighting, it can more accurately reflect the shaping effect of the angular spectrum transmittance function on the actual ghost energy; in specific operation, the local energy density function and the angular spectrum transmittance function are multiplied at the same angle parameter to obtain the local energy density after energy shaping, which not only retains the distribution characteristics of the original local energy, but also reflects the directional reduction of the angular spectrum transmittance function on the energy in the causation angle domain. Subsequently, the same numerical integration method as calculating the initial ghost intensity cost is used to discretize the causation angle domain into a plurality of small angle units at a preset angle interval, calculate the shaped local energy density value corresponding to each small angle unit, multiply the value by the solid angle of the small angle unit to obtain the unit shaped energy contribution, and finally accumulate the shaped energy contributions of all small angle units. The sum obtained is the ghost intensity cost after the shaping of the angular spectrum transmittance function. This shaped cost quantifies the total level of ghost energy after directional reduction in the causation angle domain, providing a direct energy evaluation basis for subsequent adjustment of the groove half-width parameter and the groove depth parameter to meet the quantitative constraint standard.
[0029] The decay adjustment module is used for directionally adjusting the shaped ghost intensity cost to determine the adjusted groove half-width parameter and the groove depth parameter. In the embodiments of the present application, the shaped ghost intensity cost is directionally adjusted to determine the adjusted groove half-width parameter and the groove depth parameter, which includes: The average illuminance of the projector main field of view is calculated. The quantitative constraint standard is obtained according to the product of the average illuminance and the preset index threshold. Specifically, the spatial range of the main viewing field is first defined. The range is a set of pupil exit direction vectors corresponding to the main display area designed by the projector, which has no overlap with the causation angle domain, ensuring that only the light direction that plays a leading role in normal display is included. Mark the physical area corresponding to the main viewing field on the projection screen. The area is the core display area of the standard picture projected by the projector, excluding the edge transition area. The boundary is determined by the optical design parameters of the projector (such as the field of view angle range). Use a calibrated illuminometer to sample the illuminance of the core display area. The sampling points are distributed in a uniform grid. The grid density is determined according to the area of the main viewing field. Usually, there are not less than 25 sampling points per square meter to ensure the details of the brightness change in the coverage area. Record the illuminance value of each sampling point one by one, where the illuminance value is the light flux received per unit area. Add the illuminance values of all sampling points and divide by the total number of sampling points. The result is the average illuminance of the main viewing field of the projector, which reflects the overall brightness level of the main viewing field area.
[0030] Specifically, the quantification constraint standard is obtained according to the product of the average illuminance and the preset index threshold value. The preset index threshold value is a proportionality coefficient determined based on the human eye's perception characteristics of the penumbra. Its value range is set according to the comfort requirements of immersive display, usually 0.05 to 0.15, i.e. the allowed residual penumbra intensity cost is not more than 5% to 15% of the average illuminance of the main viewing field, ensuring that the penumbra will not be significantly perceived by the human eye. Multiply the average illuminance of the main viewing field calculated earlier with the index threshold value to obtain the product, which is the quantification constraint standard. This standard is used as the upper limit value of the reshaped penumbra intensity cost for subsequent adjustment of the groove half-width parameter and the groove depth parameter, ensuring that the reshaped penumbra energy is controlled within the range that cannot be perceived by the human eye, while avoiding excessive energy reduction affecting the display effect of the main viewing field.
[0031] Adjust the groove half-width parameter and the groove depth parameter in the angular spectrum transmittance function to reduce the energy of the light outside the main viewing field angle domain of the projector, and limit the penumbra intensity cost to be lower than the quantification constraint standard; Specifically, the previously constructed reshaped ghost intensity cost quantization, constraint standard and main field angle domain range are called to clearly adjust the target to reduce the energy of the light outside the main field angle domain and make the reshaped ghost intensity cost lower than the quantization constraint standard, wherein the light outside the main field angle domain corresponds to the light in the cause angle domain that is easy to form ghost, avoiding affecting the normal light in the main field during the adjustment process. Then, the initial value of the groove half-width parameter is initially set, and the initial value is determined with reference to the angle span of the cause angle domain, so as to ensure that the energy reduction angle domain range corresponding to the parameter can completely cover the cause angle domain outside the main field angle domain, neither missing the ghost cause light nor exceeding the necessary range to avoid affecting the main field. Then, the groove depth parameter is adjusted based on the fixed initial groove half-width parameter, and the parameter is gradually increased according to the preset gradient. After each adjustment, the corresponding reshaped ghost intensity cost is calculated through the angular spectrum transmittance function, and the cost is compared with the quantization constraint standard. If the cost is still higher than the standard, the groove depth parameter is continuously increased. If the increase approaches the upper limit of the value and still does not meet the requirement, the adjustment of the groove depth parameter is suspended. At this time, the value of the groove half-width parameter is appropriately expanded, and the expansion amplitude is preferably not more than 5% of the boundary of the cause angle domain, so as to prevent the range from increasing too much and causing the energy of the light at the edge of the main field to be excessively reduced. Then, the groove depth parameter is adjusted again and the cost comparison step is repeated. In this adjustment process, the illumination change of the main field is monitored in real time to avoid the average illumination of the main field from decreasing beyond the preset display quality threshold due to parameter adjustment. The above parameter cooperative adjustment and cost comparison operations are continuously repeated until the reshaped ghost intensity cost is lower than the quantization constraint standard, and the energy of the light outside the main field angle domain is effectively reduced while the display quality of the main field is not affected. At this time, the corresponding groove half-width parameter and groove depth parameter are determined as the adaptive parameters under the current working condition.
[0032] The deflection adjustment module is configured to set an angle deflection amount and an angle deflection direction, and to perform deflection adjustment on the light direction based on the angle deflection amount and the angle deflection direction. In the embodiments of the present application, the angle deflection amount and the angle deflection direction are set, and the light direction is deflected based on the angle deflection amount and the angle deflection direction, including: The domain selection mask function is constructed based on the angular spectrum transmittance function, and the domain selection mask function is a subtraction of the angular spectrum transmittance function. Specifically, the field selection mask function is constructed based on the angular spectrum transmittance function, which is used to accurately identify the function of the light energy distribution in the cause angle domain that needs to be energy redistributed. It is constructed by 1 minus the form of the angular spectrum transmittance function, which is used to reduce the ghost energy in the cause angle domain. The field selection mask function corresponds to the energy part reduced by the angular spectrum transmittance function, that is, the spatial distribution of the ghost energy reduced in the cause angle domain. The function shares the core elements of the directional geometric criterion, the groove depth parameter, and the groove half-width parameter with the angular spectrum transmittance function, and can accurately match the range of the cause angle domain. It provides a quantitative basis for the spatial distribution of the reduced ghost energy for subsequent redistribution by the directional micro-prism array, ensuring that the energy redistribution operation is only for the ghost light in the cause angle domain, avoiding interference with the normal light propagation and display of the main field of view.
[0033] The angle deflection direction is set as the direction of the orientation vector of the system relative corner after orthogonal rotation in the horizontal plane of the exit pupil coordinate system; Specifically, when setting the angle deflection direction, first, the determined orientation vector of the system relative corner is retrieved. The vector is the unit normal component of the wall and the ground angle bisector in the horizontal plane (x-axis and z-axis plane) of the exit pupil coordinate system, and its components correspond to the horizontal axis (x-axis) and the axial direction (z-axis). Then the horizontal plane of the exit pupil coordinate system is determined, which is parallel to the ground and contains the x-axis and the z-axis, and the vertical axis (y-axis) is perpendicular to the plane. Subsequently, the vertical axis (y-axis) of the exit pupil coordinate system is taken as the rotation axis, and the orientation vector of the system relative corner is orthogonally rotated in the horizontal plane. The rotation angle is set to 90 degrees, so that the rotated vector and the original orientation vector of the system relative corner are in orthogonal relationship in the horizontal plane. The direction of the vector obtained after the above orthogonal rotation is the angle deflection direction, which is used to guide the directional deflection of the ghost light reduced in the cause angle domain, so as to avoid the main field of view area and avoid interference with normal display, while providing an accurate direction reference for the deflection angle design of the directional micro-prism array.
[0034] The angle deflection amount is calculated according to the material refractive index of the micro-prism array and the micro-prism array vertex angle, and the angle deflection amount is set to be not less than the adjusted groove half-width parameter and not more than the preset distortion threshold; Specifically, the material parameters of the micro-lens array are called, including the refractive index of the optical material constituting the micro-lens array, the value of which is pre-stored in the material parameter database of the system through material property testing and needs to be accurately matched with the actual micro-lens array material model when called; at the same time, the vertex angle of the micro-lens array is determined, which is the angle between two adjacent refractive surfaces of a single prism unit of the micro-lens array, and the value is measured based on the design drawing of the micro-lens array or by a precision optical measuring instrument, ensuring the numerical accuracy to 0.01 degree level. Based on the refraction law in geometric optics and the small-angle approximation relationship, the angle deflection amount is calculated, which is the difference between the material refractive index and 1 multiplied by the vertex angle of the micro-lens array, that is, the deflection degree of the light after refraction through the micro-lens array is quantified by the coupling relationship between the refractive index and the vertex angle. When setting the range of the angle deflection amount, the lower limit is the adjusted groove half-width parameter, which is a key parameter in the optimized angle spectrum transmittance function determined in the foregoing steps, used to limit the width of the cause angle domain, and the angle deflection amount is not less than the value, which can ensure that the micro-lens array can completely deflect the shadow light in the cause angle domain out of the original propagation direction, avoiding insufficient deflection that causes residual light to still form a shadow; secondly, the upper limit is the preset distortion threshold, which is determined based on the perception threshold of the human eye to the distortion of the projection picture, and is usually set to 0.5 to 1 degree, and the angle deflection amount is not more than the value, which can prevent excessive deflection of light that causes geometric distortion or resolution reduction at the edge of the projection picture. In the actual calculation and setting process, if the initially calculated angle deflection amount is less than the adjusted groove half-width parameter, the vertex angle of the micro-lens array needs to be increased (when the material refractive index is fixed) or a material with a higher refractive index needs to be selected (when the vertex angle is fixed), until the angle deflection amount reaches the lower limit requirement; if the angle deflection amount exceeds the preset distortion threshold, the vertex angle of the micro-lens array needs to be reduced or a material with a lower refractive index needs to be selected, until the angle deflection amount is controlled within the threshold range. Continuously adjust the material refractive index or the vertex angle parameter, finally make the angle deflection amount meet the requirements of not less than the adjusted groove half-width parameter and not more than the preset distortion threshold, provide accurate deflection angle basis for the structure design of the directional micro-lens array, and ensure that the shadow light is effectively deflected and the main field picture is not affected by distortion.
[0035] In the cause angle domain, based on the angle deflection direction and the angle deflection amount, the light direction with a positive mask function value is adjusted; Specifically, when the light direction with a positive value of the selection mask function is adjusted in the cause angle domain, the operation range is strictly limited to the cause angle domain, which is the set of exit pupil direction vectors with a directional geometric criterion less than a preset criterion threshold, ensuring that the adjustment is only for light directions prone to forming shadows. The selection mask function is called, and the area with a positive value corresponds to the shadow energy distribution reduced by the angular spectrum transmittance function in the cause angle domain, i.e., the target light direction set that needs to be adjusted by the deflection. At the same time, the determined angle deflection direction and angle deflection amount are called. In the cause angle domain, each light direction is screened one by one, and all exit pupil direction vectors with a positive value of the selection mask function are extracted. These vectors correspond to the shadow light that needs to be redistributed by the directional micro-prism array. For each screened light direction, based on the horizontal plane of the exit pupil coordinate system (the plane where the x-axis and z-axis are located), an angle deflection amount is applied along the preset angle deflection direction. Specifically, the spatial propagation direction of the light is translated by the corresponding deflection angle along the deflection direction, so that the original light propagating in the cause angle domain deviates from the easy reflection path near the angle bisector of the wall and the ground. During the adjustment process, the direction of each light after deflection needs to be checked in real time to ensure that its directional geometric criterion is greater than the preset criterion threshold, i.e., completely out of the cause angle domain, to avoid the deflected light still in the angle domain prone to double back. At the same time, it is checked whether the deflected light direction points to the non-display area outside the main viewing field to prevent interference with the normal brightness distribution of the main viewing field. After the deflection adjustment of all target lights is completed, the adjusted light direction set is integrated to form the shadow light propagation path after the action of the directional micro-prism array, realizing the directional redistribution of the shadow energy in the cause angle domain, and finally achieving the effect of suppressing shadows and ensuring the display quality of the main viewing field.
[0036] The standard determination module is configured to determine whether the adjusted measured index meets the standard, and fix the groove half-width parameter, the groove depth parameter, the angle deflection amount, and the angle deflection direction according to the determination result. In the embodiments of the present application, whether the adjusted measured index meets the standard is determined, and the groove half-width parameter, the groove depth parameter, the angle deflection amount, and the direction of the angle deflection are fixed according to the determination result, including: The installation rotation angle is calculated according to the orientation vector of the system relative corner, and the optical assembly is aligned based on the installation rotation angle. Specifically, the orientation vector of the system relative corner is called, which is the unit normal vector of the wall and ground corner bisector plane in the horizontal plane of the exit pupil coordinate system (the plane where the x-axis and z-axis lie), the included angle between the orientation vector of the system relative corner and the x-axis is calculated by the vector included angle calculation formula, which is the installation rotation angle, and its value is solved by the inverse tangent function, that is, the installation rotation angle is equal to the inverse tangent value of the ratio of the axial component to the horizontal axis component of the orientation vector of the system relative corner, which ensures the angle that the quantitative optical assembly needs to rotate to align with the direction of the wall and ground corner. When aligning the optical assembly based on the installation rotation angle, first determine the optical assembly to be aligned, including the angular spectrum groove diaphragm and the directional micro-lens array, and the action direction of these components needs to be consistent with the orientation vector of the system relative corner to ensure accurate action on the light in the cause angle domain. Fix the optical assembly on the adjustable rotating support, which can rotate around the vertical axis (y-axis) of the exit pupil coordinate system, and the rotation accuracy is not less than 0.1 degrees to meet the alignment accuracy requirements. Rotate the optical assembly by rotating the support, and the rotation angle is set to the calculated installation rotation angle. During the rotation process, use an angle measuring instrument to monitor the actual rotation angle of the component in real time until the deviation between the actual angle and the installation rotation angle is less than 0.05 degrees to ensure the angle alignment accuracy. After alignment, perform verification testing, project a test pattern and collect the light propagation path in the cause angle domain to check whether the action direction of the optical assembly matches the orientation vector of the system relative corner, that is, whether the energy reduction area of the angular spectrum groove diaphragm and the deflection direction of the directional micro-lens array accurately cover the cause angle domain. If there is a deviation, fine-tune the angle of the rotating support, repeat the angle measurement and verification steps until the alignment error between the action direction of the optical assembly and the orientation vector of the system relative corner is controlled within the allowable range, and finally achieve accurate matching of the optical assembly with the direction of the wall and ground corner, ensuring the effectiveness of the shadow suppression measures.
[0037] If the adjusted measured indicators meet the set conditions, it is determined to be up to standard and the groove half-width parameter, groove depth parameter, installation rotation angle, angle deflection direction and angle deflection amount are fixed; otherwise, it is determined to be not up to standard, and the parameters are adjusted and the optical assembly is aligned again. The set conditions are that the brightness peak value in the adjusted cause angle domain is less than the preset brightness peak threshold value, and the difference between the maximum brightness and the minimum brightness of the projection picture is less than the preset brightness difference threshold value; Specifically, after adjusting the groove half-width parameter, groove depth parameter, installation rotation angle, angle deflection direction and angle deflection amount, a high-precision brightness meter is used to measure the brightness of all regions in the causation angle domain, record the brightness values of each measurement point and extract the maximum value as the brightness peak value in the adjusted causation angle domain; at the same time, the projection picture full area is sampled according to uniform grid distribution, the brightness values of each sampling point are recorded and the difference between the maximum brightness and the minimum brightness is calculated to obtain the brightness difference value of the projection picture; the measured brightness peak value is compared with the brightness peak value threshold, wherein the brightness peak value threshold is set based on the comfort of human eye to the shadow perception, usually less than 5% of the average luminance of the main field of view, to ensure that the residual shadow brightness in the causation angle domain cannot be perceived by the human eye; the brightness difference value is compared with the preset brightness difference value threshold, and the brightness difference value threshold is set based on the uniformity standard of the immersive display picture, usually within 10% of the average luminance of the main field of view, to ensure that the overall brightness distribution of the picture is uniform and there is no obvious difference between light and dark. If the adjusted brightness peak value is less than the preset brightness peak value and the brightness difference value is less than the brightness difference value threshold, it is determined to be up to standard, and the current groove half-width parameter, groove depth parameter, installation rotation angle, angle deflection direction and angle deflection amount are fixed as the system stable working parameters; if any index does not meet the requirement, it is determined to be not up to standard, at this time, the parameter adjustment link needs to be re-entered, and the deviation reason is analyzed according to the measured results: if the causation angle domain brightness peak value is too high, the groove depth parameter needs to be increased or the groove half-width parameter needs to be appropriately expanded; if the picture brightness difference value is too large, it is necessary to check whether the angle deflection amount exceeds the distortion threshold or whether there is deviation in the alignment of the optical assembly, and the angle deflection amount is adjusted or the installation rotation angle is recalibrated until all measured indexes meet the set conditions, and the final parameter fixing and system debugging are completed.
[0038] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. An optical system for a smart projector based on an immersive experience, characterized in that, include: The orientation geometry module is used to set the exit pupil direction vector and the relative angle of the system as the vectors, and obtain the orientation geometry criterion based on the combination of the exit pupil direction vector and the relative angle of the system. The shadow intensity module is used to construct the causal angle domain based on the directional geometry criterion, calculate the shadow intensity cost within the causal angle domain, construct the angular spectrum transmittance function containing the groove half-width parameter and the groove depth parameter, and shape the shadow intensity cost. The attenuation adjustment module is used to perform directional attenuation adjustment on the intensity cost of the shaped shadow, and to determine the adjusted groove half-width parameters and groove depth parameters; The deflection adjustment module is used to set the angle deflection amount and angle deflection direction, and to adjust the direction of light rays based on the angle deflection amount and angle deflection direction; The compliance determination module is used to determine whether the standard is met based on the adjusted measured indicators, and to fix the groove half-width parameter, groove depth parameter, angle deflection amount and angle deflection direction according to the determination result.
2. The intelligent projector optical system based on immersive experience according to claim 1, characterized in that, Define the exit pupil direction vector and the relative angle vector of the system. Based on the combination of the exit pupil direction vector and the relative angle vector of the system, obtain the orientation geometric criteria, including: Establish a three-dimensional rectangular coordinate system at the exit pupil position of the projector, and take the light emission direction of the exit pupil as the exit pupil direction vector; The direction of the exit pupil is set to be within the half-space on one side of the projection screen; Define the relative angle vector of the system. The relative angle vector is the unit normal component of the angle bisector formed by the wall and the ground in the projector installation scene in the horizontal projection plane of the three-dimensional rectangular coordinate system. An antisymmetric bilinear combination of the system's relative corner vector and exit pupil direction vector yields the orientation geometric criterion.
3. The intelligent projector optical system based on immersive experience according to claim 1, characterized in that, The causative angle domain is constructed based on the directional geometric criterion. The shadow intensity cost is calculated within the causative angle domain, including: The causal angle domain is the set of directions corresponding to all exit pupil direction vectors whose orientation geometric criterion is not greater than a preset criterion threshold; Within the causal angle domain, the exit pupil angle intensity distribution is obtained by measuring the spatial light intensity of the projection system using a radiometric photometer. Obtain the wall reflection function and ground reflection function from the material reflection parameter database; Determine the geometric coupling function based on the installed geometric parameters; A local energy density function is constructed based on the exit pupil angle intensity distribution, wall reflection function, ground reflection function, and geometric coupling function. Within the causal angle domain, the local energy density function is integrated to obtain the shadow intensity cost.
4. The intelligent projector optical system based on immersive experience according to claim 1, characterized in that, Construct an angular spectral transmittance function containing groove half-width and groove depth parameters, and shape the shadow intensity cost, including: An angular spectrum transmittance function is constructed using the orientation geometric criterion as the independent variable. The angular spectrum transmittance function is a Gaussian-type oriented groove transmittance function, and this function is uniquely characterized by the groove depth parameter and the groove half-width parameter. Within the causal angular domain, the shadow intensity cost after angular spectral transmittance function shaping is calculated using the local energy density function as the weight.
5. The intelligent projector optical system based on immersive experience according to claim 1, characterized in that, The intensity cost of the reshaped shadow is adjusted by targeted attenuation to determine the adjusted groove half-width and groove depth parameters, including: Calculate the average illuminance of the projector's main field of view; The quantitative constraint standard is obtained by multiplying the average illuminance by the preset index threshold. Adjusting the groove half-width and groove depth parameters in the angular spectral transmittance function reduces the energy of light rays outside the main field of view of the projector and limits the shadow intensity cost to below the quantization constraint standard.
6. The intelligent projector optical system based on immersive experience according to claim 1, characterized in that, Set the angle deflection amount and angle deflection direction, and adjust the direction of light refraction based on the angle deflection amount and angle deflection direction, including: A localized mask function is constructed based on the angular spectral transmittance function, wherein the localized mask function is a function minus the angular spectral transmittance function; The angular deflection direction is defined as the direction of the system's relative angle vector after orthogonal rotation in the horizontal plane of the exit pupil coordinate system; The angular deflection is calculated based on the material refractive index and the apex angle of the microprism, and the angular deflection is set to be no less than the adjusted groove half-width parameter and no more than the preset distortion threshold. Within the causative angular domain, the direction of light rays with positive angular deflection values is adjusted based on the angular deflection direction and amount.
7. The intelligent projector optical system based on immersive experience according to claim 1, characterized in that, Whether the standard is met is determined based on the adjusted measured indicators. Based on the determination results, the groove half-width parameter, groove depth parameter, angle deflection amount, and angle deflection direction are fixed, including: The mounting rotation angle is calculated based on the vector of the relative corner of the system, and the optical components are aligned based on the mounting rotation angle; If the adjusted measured parameters meet the set conditions, the standard is determined and the groove half-width parameter, groove depth parameter, installation rotation angle, angle deflection direction and angle deflection amount are fixed; otherwise, the standard is determined and the parameters are readjusted and the optical components are aligned. The setting conditions are: the peak brightness in the adjusted causal angle domain is less than the preset peak brightness and the difference between the maximum and minimum brightness of the projected image is less than the preset brightness difference threshold.