CN114321840A - Optical focusing method of stage lamp and stage lamp optical system - Google Patents
Optical focusing method of stage lamp and stage lamp optical system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/10—Outdoor lighting
- F21W2131/105—Outdoor lighting of arenas or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/40—Lighting for industrial, commercial, recreational or military use
- F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios
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Abstract
The invention relates to the technical field of stage lighting, in particular to an optical focusing method of a stage lamp and an optical system of the stage lamp. The optical focusing method of the stage lamp and the stage lamp optical system can be beneficial to improving the focusing precision of the stage lamp, and are more beneficial to realizing automatic focusing, and manual focusing is not relied on, so that the stage lamp can be ensured to automatically project clear patterns at different projection positions.
Description
Technical Field
The invention relates to the technical field of stage lighting, in particular to an optical focusing method of a stage lamp and an optical system of the stage lamp.
Background
Stage lighting is one of means of stage art modeling, is an important component of a performance space, is used for carrying out omnibearing visual environment lighting design on characters and required specific scenes according to the development of plots, and purposefully reproduces design intentions to audiences in a visual image mode.
However, in order to achieve clear projection effects in different scenes, the stage lighting equipment is also equipped with an automatic focusing function, and conventional automatic focusing generally utilizes laser ranging to preset clear values corresponding to some distance points in the stage lighting equipment. The focusing method needs to do a lot of sampling data in the early stage to judge aiming points or distances, so that the situation that clear numerical values at different distances are very close to each other can be generated, and the situation that the clear numerical value judgment is inaccurate can be caused; or because the mechanical error inside the stage lamp or because the sampling quantity is insufficient, the consistency of each lamp is different, or the fine adjustment difference of each lamp is large, the sampling data cannot be accurately matched, and finally the focusing effect of the stage lamp equipment is poor, the projected image effect is not clear enough, and manual focusing still needs to be relied on.
Disclosure of Invention
In view of the above, the present invention provides an optical focusing method for a stage lamp and an optical system for a stage lamp, which are more favorable for implementing automatic focusing, and do not rely on manual focusing, so as to ensure that the stage lamp automatically projects clear patterns at different projection positions.
The invention relates to an optical focusing method of a stage lamp, which collects light beams of a focal plane of a light source which is reflected back from a projection light spot through a focusing mirror group, and images on a first light sensing module in real time.
According to the optical focusing method of the stage lamp, the first reflector is used for reflecting the returning light to the first imaging mirror, and the real-time imaging is carried out on the first light sensing module on the other side of the first imaging mirror.
According to the optical focusing method of the stage lamp, the focusing system calculates the real-time focusing point of the folded light at the moment according to the real-time imaging, and the deviation position of the real-time focusing point relative to the ideal focusing point is calculated according to the real-time focusing point.
According to the optical focusing method of the stage lamp, the focusing system calculates the focusing distance of the focusing mirror group according to the phase difference between the real-time focusing point and the ideal focusing point, and the focusing mirror group is moved by the corresponding distance and then is subjected to fine tuning compensation according to the preset value.
According to the optical focusing method of the stage lamp, the first light sensing module is located at the ideal focusing point.
According to the optical focusing method of the stage lamp, the position of the first light sensing module or the focusing mirror group is changed, whether the folded return light forms a front focal virtual image or a rear focal virtual image in the first light sensing module is judged according to the change of the real-time imaging, and then the focusing mirror group is correspondingly moved.
According to the optical focusing method of the stage lamp, the second light sensing module is used for collecting the folded light at the same time, the second light sensing module is located at a non-ideal focus point, whether a front focus virtual image or a back focus virtual image is formed in the first light sensing module by the folded light is judged according to real-time imaging on the first light sensing module and the second light sensing module respectively, and then the focusing mirror group is moved correspondingly.
According to the optical focusing method of the stage lamp, the second reflector is used for reflecting the turning light to the second imaging mirror, and the second light sensing module on the other side of the second imaging mirror is used for imaging in real time.
According to the optical focusing method of the stage lamp, the focusing system compares the optical parameters of real-time imaging with the preset optical parameters, and when the optical parameters of real-time imaging reach the preset optical parameters, the focusing mirror group stops moving.
The invention also discloses a stage lighting optical system for implementing the method, which comprises a focusing system and a light source, wherein a focal plane is formed in the light emergent direction of the light source, and a focusing lens group, an amplifying lens group and a light emergent lens group are sequentially arranged behind the focal plane, and the stage lighting optical system is characterized by further comprising:
a first light sensing module;
the folded light forms an image on the first light sensing module in real time, and the focusing system adjusts the position of the focusing lens group according to real-time imaging parameters on the first light sensing module.
The stage lighting optical system according to the present invention further includes:
a first imaging mirror;
the first reflector is arranged between the light source and the focusing mirror group, and the first light sensing module corresponds to the light emergent side of the first imaging mirror;
the first reflector receives the return light and reflects the return light to the light inlet side of the first imaging mirror, so that the return light is projected to the first light sensing module through the light outlet side of the first imaging mirror, and real-time imaging is performed on the first light sensing module.
The stage lighting optical system further comprises a second light sensing module, wherein the turning light forms images on the first light sensing module and the second light sensing module in real time through different projection directions, the first light sensing module is located at an ideal focus, and the second light sensing module is located at a non-ideal focus.
The stage lighting optical system further comprises a second imaging mirror, the turning lights are respectively reflected to the light inlet sides of the first imaging mirror and the second imaging mirror through different projection directions, and the turning lights in different directions are respectively projected to the first light sensing module and the second light sensing module through the light outlet sides of the first imaging mirror and the second imaging mirror so as to respectively form images on the first light sensing module and the second light sensing module in real time.
The stage lighting optical system further comprises a second reflecting mirror, the first reflecting mirror and the second reflecting mirror mutually form a certain included angle, and the first reflecting mirror and the second reflecting mirror respectively reflect the folded light to the light incident sides of the first imaging mirror and the second imaging mirror in different directions.
According to the stage lighting optical system, the first light sensing module and the second light sensing module respectively comprise the first CCD array and the second CCD array, and the returned light entering the first light sensing module and the second light sensing module respectively forms images on the first CCD array and the second CCD array in real time
According to the stage optical system of the present invention, the center of the first reflecting mirror is located at the focal position of the light source.
According to the optical focusing method of the stage lamp, when the projected light spot is imaged most clearly, the focus of the light beam of the focal plane of the light source, which is formed by the projected light spot passing through the focusing mirror group and returning back, is necessarily located at the focal plane of the light source, and the focus of the returning light is an ideal focus at the moment, namely the focus of the light source is an ideal focus. Light beams which are reflected to a focal plane from projection light spots through the focusing mirror group are collected according to the reversibility of the light rays, and the return light is projected on the first light sensing module to form a real-time image, and the real-time image is analyzed, the real-time focus of the folded light can be confirmed, the position of the focusing lens group is correspondingly adjusted, the focusing lens group is controlled to be close to a light source or far away from the light source, so that the focusing of the stage lamp can be synchronously realized after the real-time focusing point of the folded light is superposed with an ideal focusing point, if the reflected light is reflected by the reflector and does not always go against the main optical axis of the light source, the ideal focus point can also be the conjugate point of the focus point, therefore, the focusing system of the stage lamp has focusing reference, is beneficial to realizing automatic focusing of the stage lamp, the stage lamp can be free from manual focusing, so that the stage lamp can be ensured to automatically project clear patterns at different projection positions.
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In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of the solution of the present invention;
FIG. 2 is a schematic view of a focal plane of a light beam returning from a projection spot to a light source through a focusing mirror group in the scheme of the invention;
FIG. 3 is a partial schematic view of an embodiment of the present invention;
FIG. 4 is a partial schematic view of an embodiment of the present invention;
FIG. 5 is a schematic partial view of the principle of operation of the inventive arrangement (front focal virtual image);
FIG. 6 is a schematic partial view (back focal virtual image) of the working principle of the inventive solution;
FIG. 7 is a partial schematic view of the principle of operation of the solution of the invention;
fig. 8 is a partial schematic view of the working principle of the solution of the invention.
Reference numerals:
1. the device comprises a light source, 2, a focal plane, 3, a focusing mirror group, 4, a magnifying mirror group, 5, a light-emitting mirror group, 6, a first reflector, 7, a first imaging mirror, 8, a first CCD array, 9, a second imaging mirror, 10, a second reflector, 11 and a second CCD array.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "barrier", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element to which they are directed must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be considered as limiting.
Referring to fig. 1-3, an optical system inside a stage lamp is used as a reference to illustrate an optical focusing method of the stage lamp, when the stage lamp performs a light effect projection operation, a light beam emitted by a light source 1 passes through a focal plane 2, enters a focusing lens group 3, enters an amplifying lens group 4, and finally is emitted out from a light emitting lens group 5 to form a projection light spot on a projection target, and a part of the light beam of the projection light spot is refracted and returned to the focal plane 2 through the light emitting lens group 5, the amplifying lens group 4 and the focusing lens group 3 in sequence, by using the optical focusing method of the stage lamp, firstly, the return light of the focal plane 2 of the light source which is refracted from the projection light spot through the focusing lens group 3 is collected and is guided to be projected onto a first light sensing module, the return light beam is imaged on the first light sensing module in real time, and the focusing system adjusts the position of the focusing lens group 3 according to the real-time imaging, namely, while driving the focusing lens group 3 to move forwards or backwards (away from or close to the light source 1), the focusing system synchronously refers to the change of the real-time image on the first light sensing module, and finally the real-time focusing point of the return light on the first light sensing module is coincided with an ideal focusing point, so that the accurate focusing of the stage lamp can be synchronously realized, and the ideal focusing point is the focusing point of the light source or the conjugate point of the focusing point.
In the optical focusing method of this embodiment, when the projected light spot of the stage lamp forms the clearest image, the focus of the light beam of the focal plane of the light source, which is formed by the projected light spot being folded back by the focusing mirror group, is necessarily located at the focal plane of the light source, and at this time, the focus of the folded back light is also the ideal focus, that is, the focus of the light source is the ideal focus. Light beams which are reflected to a focal plane from projection light spots through the focusing mirror group are collected according to the reversibility of the light rays, and the return light is projected on the first light sensing module to form a real-time image, and the real-time image is analyzed, the real-time focus of the folded light can be confirmed, the position of the focusing lens group is correspondingly adjusted, the focusing lens group is controlled to be close to a light source or far away from the light source, so that the focusing of the stage lamp can be synchronously realized after the real-time focusing point of the folded light is superposed with an ideal focusing point, if the reflected light is reflected by the reflector and does not always go against the main optical axis of the light source, the ideal focus point can also be the conjugate point of the focus point, therefore, the focusing system of the stage lamp has focusing reference, is beneficial to realizing automatic focusing of the stage lamp, the stage lamp can be free from manual focusing, so that the stage lamp can be ensured to automatically project clear patterns at different projection positions.
In one embodiment, as shown in fig. 1 to 4, the first reflector 6 is used to reflect the returning light to the first imaging mirror 7, and a real-time image is formed on the first photo-sensing module on the light-emitting side of the first imaging mirror 7.
It can be understood that the reflected light can be effectively collected through the reflective property of the first reflector 6, and the first imaging mirror 7 is utilized to receive the emitted light beam and smoothly project the emitted light beam onto the first light sensing module, so that the real-time imaging A is effectively generated. Through setting up first speculum 6 can realize with first light sense module does not set up on the primary optical axis of light source 1, avoids light source 1 shelters from light, and first speculum 6 can be transparent material, only turns back the light reflection with the part extremely first light sense module, and the influence of sheltering from to light source 1 light simultaneously is also less.
In one embodiment, optionally, as shown in fig. 1-4, the folded light is projected into the first CCD array 8 in the first light sensing module through the first imaging mirror 7, and forms a real-time image in the first CCD array 8.
It can be understood that the CCD array can more accurately display the position of real-time imaging, so that the focusing system can be accurately detected conveniently, and the focusing accuracy can be improved.
In one embodiment, as shown in fig. 1 to 4, the focusing system calculates the real-time focusing point a of the reflected light according to real-time imaging, wherein the calculation is based on parameters such as the shape, the brightness distribution, and the spectral distribution of the real-time imaging.
It can be understood that when the folded light is projected to the first CCD array 8 through the first imaging mirror 7 and generates a real-time image, the focusing system can calculate the real-time focusing point position parameter of the folded light by using the shape, brightness distribution, spectral distribution and other parameters of the real-time image, so that the moving direction of the focusing system for controlling the focusing lens group 3 can be determined according to the deviation position of the real-time focusing point a relative to the conjugate point B (which is an ideal focusing point at this time).
Specifically, as shown in fig. 1 to 4, after the first CCD array 8 generates real-time imaging, the real-time focusing point a may be calculated by the CCD array, the focusing system calculates a focusing distance to the focusing lens group 3 according to a phase difference between the real-time focusing point a and the conjugate point B, and further performs fine adjustment compensation on the focusing lens group 3 according to a preset value after moving the focusing lens group 3 by a corresponding distance.
It can be understood that after the first CCD array 8 generates real-time imaging, the position of the real-time focusing point a can be calculated by the CCD array, as shown in fig. 3 and 5, if the real-time focusing point a is located at c1, the real-time focusing point c1 belongs to the front focus (if the real-time focusing point a is located at the front focus, the focusing system needs to drive the focusing lens assembly 3 to move toward the light source 1 and approach the light source 1), and as shown in fig. 3 and 6, if the real-time focusing point a is located at a1, the real-time focusing point belongs to the back focus (if the real-time focusing point B is located at the back focus, the focusing system needs to drive the focusing lens assembly 3 to move away from the light source 1 and away from the light source 1), so that the focusing system can be helped to determine the driving direction of the focusing lens assembly 3, and at the same time calculate the phase difference between the real-time focusing point and the conjugate point B (i.e. c1-B or a1-B), and finally, the focusing system can be helped to determine the moving stroke of the focusing lens assembly 3, the focusing distance is specific, and the focusing mirror group 3 is subjected to fine tuning compensation according to a preset value to compensate mechanical errors, so that the stage lamp can be automatically focused more accurately.
The fine adjustment compensation takes the design error of a mechanical structure into consideration, and the error is invariable, so that before the lamp is produced, when the projected light spot is tested to be perfect and clear, the difference between the position of the focusing mirror group 3 and the numerical value automatically calculated by the system is tested, the numerical value of the fine adjustment compensation is preset according to the experimental result, and the focusing at each time can be more perfect.
In one embodiment, the first photo sensing module is located at the conjugate point B, i.e. the first CCD array 8 is located at the conjugate point B, in other embodiments, the first photo sensing module may be directly located at the focus of the light source 1, and all belong to ideal focus. It can be understood that the CCD array is set at the ideal pre-calculated focusing point (the focus of the light source 1 or the conjugate point of the focus), so that the CCD array can be used as a reference for focusing, for example, when the real-time image of the folded light is displayed most clearly on the first CCD array 8, it can be synchronously determined that the stage lamp is in an accurate focusing state at present, so that the focusing system only needs to detect the imaging condition of the folded light on the CCD array to determine the focusing instruction sent to the focusing mirror group 3.
In an embodiment, as shown in fig. 7, when the first CCD array 8 is located at the conjugate point B, the position of the first CCD array 8 or the focusing mirror assembly 3 is changed, whether the return light forms a front-focus virtual image or a rear-focus virtual image in the first CCD array 8 is determined according to the real-time imaging, and then the focusing mirror assembly 3 is moved correspondingly.
That is, when the first CCD array 8 is located at the conjugate point B, the folded light is reflected to enter the first imaging mirror 7 and projected to the first CCD array 8, and then the position of the focusing mirror assembly 3 (or the first CCD array 8) is changed for a plurality of times, so that the folded light is imaged in the first CCD array 8 for a plurality of times, and the first CCD array 8 records parameters (for example, the size of a light spot) of each imaging light spot, and then by comparing the parameters of each imaging light spot, it can be determined whether the real-time imaging of the folded light in the first CCD array 8 is a front-focus virtual image or a back-focus virtual image, so as to determine the focusing direction, if the real-time imaging light is a front-focus virtual image, the focusing system needs to drive the focusing mirror assembly 3 to move toward the light source 1, approach the light source 1, and if the real-time imaging light is a back-focus virtual image, the focusing system needs to drive the focusing mirror assembly 3 to move away from the light source 1, and move away from the light source 1, so as to gradually move the real-time focusing point a toward the ideal focusing point a1 one by one step, thus, the accurate automatic focusing can be completed.
In an embodiment, referring to fig. 8, by using the second CCD array 11 in the second light sensing module to simultaneously reflect the light, the second CCD array 11 is located at a non-ideal focus (i.e. not located at the focus of the light source 1 or the conjugate point B), and according to respective real-time images (e.g. the size of a light spot) on the first CCD array 8 and the second CCD array 11, it is determined whether the reflected light forms a front-focus virtual image or a back-focus virtual image in the CCD array, and then the focusing mirror group 3 is correspondingly moved.
That is, in this embodiment, as shown in fig. 8, the first CCD array 8 is set at the conjugate point B, meanwhile, the second CCD array 11 is arranged at a non-conjugate point B (a front focal position or a rear focal position), the folded light is respectively projected to the first CCD array 8 and the rear second CCD array 11 from two directions, by comparing the real-time imaging of the first CCD array 8 with the real-time imaging of the second CCD array 11, the real-time imaging can be directly judged to be in front focus or back focus, thereby judging the focusing direction, if it is a front focus virtual image, the focusing system needs to drive the focusing lens assembly 3 to move toward the light source 1 and approach the light source 1, if it is a rear focus virtual image, the focusing system needs to drive the focusing lens group 3 to move away from the light source 1, thus, the real-time focusing point of the real-time imaging gradually moves to the ideal focusing point B step by step, and the accurate automatic focusing can be completed.
In one embodiment, the focusing system compares the optical parameters of the real-time imaging with preset optical parameters, and stops moving the focusing lens group when the optical parameters of the real-time imaging reach the preset optical parameters.
It can be understood that the light spot parameters of the folded return light falling on the ideal focusing point a1 are calculated in advance, the parameters are used as focusing bases, in the focusing process, when the focusing system detects that the light spot parameters of the real-time imaging of the folded return light on the CCD array are matched with the preset light spot parameters, the focusing state of the stage lamp can be automatically judged, and therefore the focusing lens group 3 can stop moving continuously, the focusing system of the stage lamp has more focusing references, and the automatic focusing of the stage lamp is more favorably realized.
In addition, the present embodiment also provides a stage lighting optical system, which is used for implementing the optical focusing method of the stage lighting of the present invention, as shown in fig. 1 to 4, the optical focusing system includes a focusing system and a light source 1, a focal plane 2 is formed in the light emitting direction of the light source 1, and a focusing lens group 3, an amplifying lens group 4 and a light emitting lens group 5 are sequentially arranged behind the focal plane 2, and the optical focusing system further includes a first light sensing module, when the optical focusing system works, the refracted light forms an image on the first light sensing module in real time, and the focusing system adjusts the position of the focusing lens group 3 according to real-time imaging parameters on the first light sensing module.
In an embodiment, as shown in fig. 1 to 4, the optical device further includes a first imaging mirror 7 and a first reflecting mirror 6, the first reflecting mirror 6 is disposed between the light source 1 and the focusing lens assembly 3, and the first light sensing module corresponds to the light emitting side of the first imaging mirror 7, wherein the first reflecting mirror 6 receives the returned light and reflects the returned light to the light emitting side of the first imaging mirror 7, so that the returned light is projected to the first light sensing module through the light emitting side of the first imaging mirror 7 to form an image on the first light sensing module in real time.
It can be understood that the first reflector 6 is disposed between the light source 1 and the focusing lens group 3, so as to facilitate the collection of the reflected light, and under the imaging action of the first imaging lens 7, the collected reflected light can be smoothly projected onto the first photo sensing module for real-time imaging.
In an embodiment, as shown in fig. 1 to 3 and 8, the imaging device further includes a second imaging mirror 9 and a second light sensing module, specifically, the first light sensing module and the second light sensing module respectively include a first CCD array 8 and a second CCD array 11, the folded light is respectively reflected to the light incident sides of the first imaging mirror 7 and the second imaging mirror 9 through different directions, the folded light in different directions is respectively projected to the first CCD array 8 and the second CCD array 11 through the light emergent sides of the first imaging mirror 7 and the second imaging mirror 9, so as to respectively image on the first CCD array 8 and the second CCD array 11 in real time, the first CCD array 8 is located at an ideal focus, and the second CCD array 11 is located at a non-ideal focus.
It can be understood that the second imaging lens 9 is used to allow the returning light to be smoothly projected onto the second CCD array 11 to realize real-time imaging, and as shown in fig. 3 and 8, the first CCD array 8 is disposed at the conjugate point B, and the second CCD array 11 is disposed at the non-conjugate point B (front focal position or back focal position), and the returning light is projected onto the first CCD array 8 and the back second CCD array 11 from two directions, respectively, and then the real-time imaging of the first CCD array 8 and the real-time imaging of the second CCD array 11 are compared to directly determine whether the real-time imaging is in front focal or back focal, so as to determine the focusing direction, if the image is a front focal virtual image, the focusing system needs to drive the focusing lens assembly 3 to move toward the light source 1 and approach the light source 1, and if the image is a back focal virtual image, the focusing system needs to drive the focusing lens assembly 3 to move away from the light source 1 and keep away from the light source 1, thus, the real-time focusing point of the real-time imaging gradually moves to the ideal focusing point B step by step, and the accurate automatic focusing can be completed.
In one embodiment, the folded light entering the first light sensing module and the second light sensing module is imaged on the first CCD array 8 and the second CCD array 11 in real time, respectively, and it can be understood that the CCD arrays can be used to more accurately display the position of the real-time imaging, which is convenient for the accurate detection of the focusing system and can improve the accuracy of focusing.
In one embodiment, as shown in fig. 4, the imaging device further includes a second reflecting mirror 10, the first reflecting mirror 6 and the second reflecting mirror 10 form an included angle with each other, and the first reflecting mirror 6 and the second reflecting mirror 10 respectively reflect the reflected light to the light incident sides of the first imaging mirror 7 and the second reflecting mirror 10 in different directions.
It can be understood that, utilize first speculum 6 and second speculum 10 to constitute certain contained angle ground each other and set up between focusing mirror group 3 and focal plane 2, can collect multichannel light beam from different directions effectively, utilize multichannel light beam from different directions to reflect respectively to the income light side of first imaging mirror 7 and second speculum 10, finally can let first CCD array 8 and the second CCD array 11 that are in different positions connect respectively and fold the return light to utilize real-time formation of image on first CCD array 8 and the second CCD array 11 to assist the focusing system to judge and focus.
In one embodiment, as shown in fig. 1-4, the center of the first reflector 6 is located at the focal position of the light source 1.
In one embodiment, as shown in fig. 4, the first reflector 6 and the second reflector 10 are semi-transparent reflectors, the front sides of the first reflector 6 and the second reflector 10 are both reflective surfaces, the reflective surfaces are forward corresponding to the focusing lens group 3, the back sides of the first reflector 6 and the second reflector 10 are both non-reflective surfaces, the non-reflective surfaces are backward corresponding to the focal plane 2, and the reflector 6 is a semi-transparent reflector, so that the light source can be allowed to pass through, the light beam passing out of the focal plane 2 can be prevented from being shielded, the normal projection of the stage lamp can be ensured, and the reflector can also play a role of reflection, and is convenient to use.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (16)
1. The optical focusing method of the stage lamp is characterized in that foldback light of a focal plane of a light source is collected and is folded back from a projection light spot through a focusing mirror group, real-time imaging is carried out on a first light sensing module, a focusing system adjusts the position of the focusing mirror group according to the real-time imaging, so that the real-time focusing point of the foldback light is coincident with an ideal focusing point, and the ideal focusing point is a focus of the light source or a conjugate point of the focus.
2. The stage lamp optical focusing method of claim 1, wherein the first reflector reflects the returning light to the first imaging mirror and images on the first light sensing module on the other side of the first imaging mirror in real time.
3. The stage lamp optical focusing method according to claim 1, wherein the focusing system calculates a real-time focusing point of the returning light at that time according to the real-time imaging, and calculates a deviation position of the real-time focusing point from an ideal focusing point according to the real-time focusing point.
4. The stage lamp optical focusing method of claim 3, wherein the focusing system calculates the focusing distance of the focusing lens set according to the phase difference between the real-time focusing point and the ideal focusing point, and further performs fine tuning compensation on the focusing lens set according to a preset value after moving the focusing lens set by a corresponding distance.
5. The stage lamp optical focusing method of claim 1, wherein the first light sensing module is located at the ideal focus point.
6. The stage lamp optical focusing method according to claim 5, wherein the position of the first light sensing module or the focusing lens set is changed, whether the folded return light forms a front focus virtual image or a rear focus virtual image in the first light sensing module is determined according to the change of the real-time imaging, and then the focusing lens set is moved correspondingly.
7. The stage lamp optical focusing method of claim 5, wherein a second light sensing module is used to collect the return light, the second light sensing module is located at a non-ideal focus point, and the first light sensing module and the second light sensing module are respectively imaged in real time to determine whether the return light forms a front focus virtual image or a back focus virtual image in the first light sensing module, and then the focusing lens group is moved correspondingly.
8. The stage lamp optical focusing method of claim 7, wherein the second reflecting mirror reflects the returning light to the second imaging mirror and forms an image on the second light-sensing module on the other side of the second imaging mirror in real time.
9. The stage lamp optical focusing method of claim 6 or 7, wherein the focusing system compares the real-time imaged optical parameters with preset optical parameters, and stops moving the focusing lens set when the real-time imaged optical parameters reach the preset optical parameters.
10. A stage lighting optical system for implementing the method according to any one of claims 1 to 9, comprising a focusing system and a light source (1), wherein a focal plane (2) is formed in the light emitting direction of the light source (1), and a focusing lens group (3), an amplifying lens group (4) and a light emitting lens group (5) are sequentially arranged behind the focal plane (2), and the stage lighting optical system further comprises:
a first light sensing module;
the reflected light forms an image on the first light sensing module in real time, and the focusing system adjusts the position of the focusing lens group (3) according to real-time imaging parameters on the first light sensing module.
11. The stage lighting system of claim 10, further comprising:
a first imaging mirror (7);
the first reflector (6) is arranged between the light source (1) and the focusing mirror group (3), and the first light sensing module corresponds to the light emergent side of the first imaging mirror (7);
the first reflector (6) receives the return light and reflects the return light to the light inlet side of the first imaging mirror (7), and the return light is projected to the first light sensing module through the light outlet side of the first imaging mirror (7) so as to form an image on the first light sensing module in real time.
12. The stage lighting system of claim 11, further comprising a second light-sensing module, wherein the returned light is imaged in real time on the first light-sensing module and the second light-sensing module respectively through different projection directions, the first light-sensing module being located at an ideal focus point, and the second light-sensing module being located at a non-ideal focus point.
13. The stage lighting system of claim 12, further comprising a second imaging mirror (9), wherein the folded light is reflected to the light incident sides of the first imaging mirror (7) and the second imaging mirror (9) through different projection directions, respectively, so that the folded light in different directions is projected to the first light sensing module and the second light sensing module through the light emergent sides of the first imaging mirror (7) and the second imaging mirror (9), respectively, to form images on the first light sensing module and the second light sensing module in real time, respectively.
14. The stage lighting system of claim 13, further comprising a second reflecting mirror (10), wherein the first reflecting mirror (6) and the second reflecting mirror (10) mutually form an included angle, and the first reflecting mirror (6) and the second reflecting mirror (10) respectively reflect the folded light to the light incident sides of the first imaging mirror (7) and the second imaging mirror (9) in different directions.
15. The stage lighting system of claim 12, wherein the first and second light sensing modules comprise a first CCD array (8) and a second CCD array (11), respectively, and the return light entering the first and second light sensing modules is imaged in real time on the first and second CCD arrays (8) and (11), respectively.
16. Stage light optical system according to claim 11, characterized in that the center of the first reflector (6) is located at the focal position of the light source (1).
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| CN202111670255.5A CN114321840B (en) | 2021-12-31 | 2021-12-31 | Stage lamp optical focusing method and stage lamp optical system |
| PCT/CN2022/134401 WO2023124683A1 (en) | 2021-12-31 | 2022-11-25 | Stage lamp optical focusing method and stage lamp optical system |
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