CN114321840B - Stage lamp optical focusing method and stage lamp optical system - Google Patents
Stage lamp optical focusing method and stage lamp optical system Download PDFInfo
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- CN114321840B CN114321840B CN202111670255.5A CN202111670255A CN114321840B CN 114321840 B CN114321840 B CN 114321840B CN 202111670255 A CN202111670255 A CN 202111670255A CN 114321840 B CN114321840 B CN 114321840B
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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
Abstract
The invention relates to the technical field of stage lighting, in particular to an optical focusing method and a stage lighting optical system for a stage lighting. The optical focusing method and the stage light optical system of the invention can help to improve the focusing precision of the stage light, and are more beneficial to realizing automatic focusing without relying on manual focusing, thereby ensuring that the stage light automatically projects 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 and an optical system of stage lamps.
Background
Stage lighting is one of means of stage art modeling, and is an important component of a performance space, and is used for performing light design of an omnibearing visual environment on a person and a required specific scene according to the development of a plot, and purposefully reproducing design intent to an audience in a visual image manner.
However, in order to achieve a clear projection effect in different scenes, an automatic focusing function is further provided in the stage lighting device, and a clear value corresponding to a few distance points is preset in the stage lamp by using laser ranging in the conventional automatic focusing. In the focusing method, a lot of sampling data are needed in the early stage to judge aiming points or distances, so that the situation that clear numerical values of different distances are very close 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 the insufficient sampling quantity can cause the consistency of each lamp to be different, or the fine adjustment gap of each lamp is larger, the sampling data can not be accurately matched, and finally the focusing effect of the stage lamp equipment is poor, the projected image effect is not clear enough, and the manual focusing is still needed to be relied on.
Disclosure of Invention
In view of this, the present invention provides an optical focusing method and an optical system for stage lamps, which are more beneficial to realizing automatic focusing, and do not rely on manual focusing, so as to ensure that stage lamps can automatically project clear patterns at different projection positions.
The invention relates to an optical focusing method of stage lamps, which is characterized in that light beams of a focus plane of a light source are returned from projection light spots through a focusing lens group, and are imaged on a first light sensing module in real time, and a focusing system adjusts the position of the focusing lens group according to the real-time imaging, so that the real-time focusing point of the returned light coincides with an ideal focusing point, and the ideal focusing point is the focus of the light source or the conjugate point of the focus.
According to the optical focusing method of the stage lamp, the first reflecting mirror is utilized to reflect the returned light to the first imaging mirror, and the returned light is imaged on the first light sensing module at the other side of the first imaging mirror in real time.
According to the optical focusing method of the stage lamp, the focusing system calculates the real-time focusing point of the returning light according to the real-time imaging, and the deviation position of the real-time focusing point relative to the ideal focusing point is obtained 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 lens group according to the phase difference between the real-time focusing point and the ideal focusing point, and fine adjustment compensation is further carried out on the focusing lens group according to a preset value after the focusing lens group moves by a corresponding distance.
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 lens group is changed, whether the returned light forms a front Jiao Xuxiang virtual image or a rear virtual image in the first light sensing module is judged according to the real-time imaging change, and then the focusing lens group is correspondingly moved.
According to the optical focusing method of the stage lamp, the second light sensing module is utilized to collect the returning light at the same time, the second light sensing module is positioned at the ideal focusing point, and according to real-time imaging on the first light sensing module and the second light sensing module respectively, whether the returning light forms a front Jiao Xuxiang virtual image or a rear virtual image in the first light sensing module is judged, and then the focusing lens group is correspondingly moved.
According to the optical focusing method of the stage lamp, the second reflecting mirror is utilized to reflect the returned light to the second imaging mirror, and the returned light is imaged on the second light sensing module at the other side of the second imaging mirror in real time.
According to the optical focusing method of the stage lamp, the focusing system compares the real-time imaging optical parameters with the preset optical parameters, and when the real-time imaging optical parameters reach the preset optical parameters, the focusing lens group stops moving.
The invention also discloses a stage lamp optical system for implementing the method, which comprises a focusing system and a light source, wherein a focal plane is formed in the light emitting direction of the light source, and a focusing lens group, a magnifying lens group and a light emitting lens group are sequentially arranged behind the focal plane, and the stage lamp 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.
A stage light optical system according to the present invention further comprises:
a first imaging mirror;
the first reflecting mirror is arranged between the light source and the focusing lens group, and the first light sensing module is correspondingly arranged on the light emitting side of the first imaging lens;
the first reflecting mirror receives the returning light and reflects the returning light to the light inlet side of the first imaging mirror, and the returning light is projected to the first light sensing module through the light outlet side of the first imaging mirror so as to form an image on the first light sensing module in real time.
According to the stage lamp optical system, the stage lamp optical system further comprises a second light sensing module, the returned light images on the first light sensing module and the second light sensing module respectively in real time through different projection directions, the first light sensing module is located at an ideal focusing point, and the second light sensing module is located at a non-ideal focusing point.
According to the stage lamp optical system, the stage lamp optical system further comprises a second imaging mirror, the returning light is reflected to the light inlet sides of the first imaging mirror and the second imaging mirror respectively through different projection directions, and the returning light in different directions is projected to the first light sensing module and the second light sensing module respectively through the light outlet sides of the first imaging mirror and the second imaging mirror respectively, so that real-time imaging is carried out on the first light sensing module and the second light sensing module respectively.
According to the stage lamp optical system, the stage lamp optical system further comprises a second reflecting mirror, wherein a certain included angle is formed between the first reflecting mirror and the second reflecting mirror, and the first reflecting mirror and the second reflecting mirror respectively reflect the returned light to the light inlet sides of the first imaging mirror and the second imaging mirror in different directions.
According to the stage lighting optical system of the invention, the first light sensing module and the second light sensing module respectively comprise a first CCD array and a second CCD array, and the returned light entering the first light sensing module and the second light sensing module respectively form real-time imaging on the first CCD array and the second CCD array
According to the stage lighting optical system of the invention, the center of the first reflecting mirror is positioned at the focal point of the light source.
According to the optical focusing method of the stage lamp, when the projected light spots are formed into the clearest images, the focus of the light beam of the focus plane of the projected light spots passing through the focusing lens set turn back the light source is necessarily located at the focus plane of the light source, and at the moment, the focus of the turned back light is the ideal focusing point, namely the focus of the light source is the ideal focusing point. According to the reversibility of light, light beams which are returned to a focal plane from projection light spots through a focusing lens group are collected, the returned light is projected on a first light sensing module to image in real time, the real-time focus of the returned light can be confirmed through analysis of real-time imaging, 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, after the real-time focus of the returned light is overlapped with an ideal focusing point, focusing of a stage lamp can be synchronously realized, according to a conjugation principle, if the returned light is reflected by a reflecting mirror, the ideal focusing point can be a conjugation point of the focus instead of always reversing the main optical axis direction of the light source, therefore, a focusing system of the stage lamp has focusing reference, automatic focusing of the stage lamp can be realized, manual focusing can be omitted, and accordingly the stage lamp can be ensured to automatically project clear patterns at different projection positions.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic overall structure of the scheme of the present invention;
FIG. 2 is a schematic focal plane view of a light source for returning a light beam from a projected light spot through a focusing lens 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 view of the working principle of the solution of the invention (front Jiao Xuxiang);
fig. 6 is a schematic view of the working principle of the solution of the invention (rear Jiao Xuxiang);
FIG. 7 is a schematic view of a portion of the principle of operation of the solution of the present invention;
fig. 8 is a schematic partial 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 lens group, 4, a magnifying lens group, 5, a light-emitting lens group, 6, a first reflecting mirror, 7, a first imaging mirror, 8, a first CCD array, 9, a second imaging mirror, 10, a second reflecting mirror, 11 and a second CCD array.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. In the description of the present invention, it should be understood that the positional or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "barrier", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "Zhou Xiang, etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of description and simplicity of description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.
As shown in fig. 1 to 3, the optical focusing method of the stage lamp is described by taking an optical system inside the stage lamp as a reference, when the stage lamp performs the projection work of the lamp effect, a light beam emitted by the light source 1 passes through the focal plane 2 and then enters the focusing lens group 3, and then enters the magnifying lens group 4, and finally, the light beam is emitted outwards from the light emitting lens group 5, a projection light spot is formed on a projection target, and part of the light beam of the projection light spot sequentially passes through the light emitting lens group 5, the magnifying lens group 4 and the focusing lens group 3 and is folded back to the focal plane 2.
In the optical focusing method of the present embodiment, when the stage lamp forms the clearest image of the projected light spot, the focal point of the light beam passing through the focal plane of the folded light source of the focusing lens set inevitably falls at the focal plane of the light source, and at this time, the focal point of the folded light is the ideal focusing point, that is, the focal point of the light source is the ideal focusing point. According to the reversibility of light, light beams which are returned to a focal plane from projection light spots through a focusing lens group are collected, the returned light is projected on a first light sensing module to image in real time, the real-time focus of the returned light can be confirmed through analysis of real-time imaging, 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, after the real-time focus of the returned light is overlapped with an ideal focusing point, focusing of a stage lamp can be synchronously realized, according to a conjugation principle, if the returned light is reflected by a reflecting mirror, the ideal focusing point can be a conjugation point of the focus instead of always reversing the main optical axis direction of the light source, therefore, a focusing system of the stage lamp has focusing reference, automatic focusing of the stage lamp can be realized, manual focusing can be omitted, and accordingly the stage lamp can be ensured to automatically project clear patterns at different projection positions.
In one embodiment, as shown in connection with fig. 1-4, the returning light is reflected by the first mirror 6 to the first imaging mirror 7 and forms real-time imaging on the first light-sensing module on the light-outgoing side of the first imaging mirror 7.
It will be appreciated that the reflection characteristic of the first mirror 6 allows the folded light to be effectively collected, and the emitted light beam to be received by the first imaging mirror 7 and smoothly projected onto the first light sensing module, so that the real-time image a is effectively generated. The first light sensing module is not arranged on the main optical axis of the light source 1 by arranging the first reflecting mirror 6, so that the light source 1 is prevented from shielding light, the first reflecting mirror 6 can be made of transparent materials, only part of returned light is reflected to the first light sensing module, and meanwhile, the shielding influence on the light of the light source 1 is small.
In one embodiment, optionally, as shown in connection with fig. 1-4, the returning light is projected by a first imaging mirror 7 into a first CCD array 8 within the first light sensing module and forms real-time imaging in the first CCD array 8.
It can be understood that the CCD array can be used for accurately displaying the real-time imaging position, so that the accurate detection of the focusing system is facilitated, 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 returning light according to real-time imaging, and the basis of calculation is parameters such as the shape, brightness distribution, spectrum distribution and the like of the real-time imaging.
It can be understood that when the returning light is projected to the first CCD array 8 through the first imaging lens 7 and real-time imaging is generated, the focusing system can calculate the real-time focusing point position parameter of the returning light by using the shape, brightness distribution, spectrum distribution and other parameters of the real-time imaging, so that the moving direction of the focusing lens set 3 controlled by the focusing system can be determined according to the deviated position of the real-time focusing point a relative to the conjugate point B (which is the ideal focusing point at this time).
Specifically, referring to 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 the focusing distance of the focusing lens group 3 according to the phase difference between the real-time focusing point a and the conjugate point B, and fine-tuning compensation is further performed on the focusing lens group according to a preset value after the focusing lens group 3 moves by a corresponding distance.
It will be understood that, after the first CCD array 8 generates real-time imaging, the position of the real-time focusing point a may be calculated by using the CCD array, as shown in fig. 3 and 5, if the real-time focusing point a is located at the position c1, the real-time focusing point c1 belongs to front focus (if it is front focus, the focusing system needs to drive the focusing lens group 3 to move toward the light source 1 and to be close to the light source 1), as shown in fig. 3 and 6, if the real-time focusing point is located at the position a1, the real-time focusing point belongs to rear focus (if it is rear focus, the focusing system needs to drive the focusing lens group 3 to move away from the light source 1 and away from the light source 1), so as to help the focusing system determine the driving direction of the focusing lens group 3, and calculate the phase difference (i.e. c1-B or a 1-B) between the real-time focusing point and the conjugate point B, and finally help the focusing system determine the movement stroke of the focusing lens group 3, i.e. the specific focusing distance, and finally compensate the focusing lens group 3 according to a preset value, so as to compensate the mechanical error, and make the stage lamp more accurately focus.
The fine adjustment compensation considers the design error of the mechanical structure, and because the error is unchanged, when the projected light spots of the lamp are tested to be perfect and clear before the lamp is produced, the difference between the position of the focusing lens group 3 and the numerical value automatically calculated by the system is tested, and the numerical value of the fine adjustment compensation is preset according to the experimental result, so that the focusing of each time is more perfect.
In one embodiment, the first light sensing module is located at the conjugate point B, that is, the first CCD array 8 is located at the conjugate point B, and in other embodiments, the first light sensing module may be directly located at the focal point of the light source 1, which all belong to an ideal focal point. It can be understood that the CCD array is set at a pre-calculated ideal focusing point (the focal point of the light source 1 or the conjugate point of the focal point), so that the CCD array can be used as a reference for focusing, for example, when the real-time imaging of the returning light is displayed on the first CCD array 8 most clearly, the stage lamp can be synchronously determined to be in an accurate focusing state at present, so that the focusing system only needs to determine the focusing instruction sent to the focusing lens set 3 by detecting the imaging condition of the returning light on the CCD array.
In one 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 lens group 3 is changed, and whether the folded light forms a front Jiao Xuxiang or a back focal virtual image in the first CCD array 8 is determined according to the real-time imaging, and then the focusing lens group 3 is correspondingly moved.
That is, when the first CCD array 8 is located at the conjugate point B, after the returning light is reflected into the first imaging mirror 7 and projected onto the first CCD array 8, the returning light is imaged in the first CCD array 8 by changing the position of the focusing mirror group 3 (or the first CCD array 8) multiple times, so that the first CCD array 8 records the parameter of each imaging light spot (for example, the size of the light spot), and then by comparing the parameter of each imaging light spot, it can be determined whether the real-time imaging of the returning light in the first CCD array 8 is in the front focal virtual image or the rear Jiao Xuxiang, so as to determine the focusing direction, if the returning light is in the front focal virtual image, the focusing system needs to drive the focusing mirror group 3 to move towards the direction of the light source 1, and if the returning light is in the rear Jiao Xuxiang, the focusing mirror group 3 needs to move towards the direction away from the light source 1, and away from the light source 1, so that the real-time focusing point a of the real-time imaging a is gradually moved towards the ideal focusing point a1 step by step, and accurate automatic focusing can be completed.
In one embodiment, as shown in fig. 8, the second CCD array 11 in the second light sensing module is utilized to simultaneously use the folded light, the second CCD array 11 is located at a non-ideal focusing point (i.e. not located at the focal point or the conjugate point B of the light source 1), and according to real-time imaging (for example, the size of the light spot) on the first CCD array 8 and the second CCD array 11, whether the folded light forms a front Jiao Xuxiang or a back virtual image in the CCD array is determined, and then the focusing lens group 3 is correspondingly moved.
That is, in this embodiment, as shown in fig. 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 rear focal position), after the folded light is projected to the first CCD array 8 and the rear second CCD array 11 from two directions, respectively, by comparing the real-time imaging of the first CCD array 8 with the real-time imaging of the second CCD array 11, it can be directly determined whether the real-time imaging is in front focal or rear focal, so as to determine the focusing direction, if the front focal virtual image is the front focal virtual image, the focusing system needs to drive the focusing lens set 3 to move toward the light source 1, and is close to the light source 1, if the rear focal virtual image is the rear image Jiao Xuxiang, the focusing system needs to drive the focusing lens set 3 to move away from the light source 1, so as to gradually move the real-time focusing point of the real-time imaging toward the ideal focusing point B step by step, and thus accurate automatic focusing can be completed.
In one embodiment, the focusing system compares the real-time imaging optical parameter with a preset optical parameter, and stops moving the focusing lens group when the real-time imaging optical parameter reaches the preset optical parameter.
It can be understood that by calculating the spot parameter of the returning light falling on the ideal focusing point a1 in advance, and taking the parameter as the focusing basis, when the focusing system detects that the spot parameter of the returning light on the CCD array for real-time imaging is matched with the preset spot parameter in the focusing process, the stage lamp can be automatically judged to reach the focusing state, so that the focusing lens group 3 can be stopped from being continuously moved, the focusing system of the stage lamp has more focusing references, and the automatic focusing of the stage lamp is more facilitated.
In addition, the embodiment also provides a stage lamp optical system, as shown in fig. 1 to 4, for implementing the optical focusing method of the stage lamp of the invention, the stage lamp optical system comprises a focusing system and a light source 1, a focal plane 2 is formed in the light emitting direction of the light source 1, a focusing lens group 3, a magnifying lens group 4 and a light emitting lens group 5 are sequentially arranged behind the focal plane 2, and the stage lamp optical system further comprises a first light sensing module, when the stage lamp optical system works, the returned light 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 real-time imaging parameters on the first light sensing module.
In one embodiment, as shown in fig. 1 to 4, the optical imaging device further comprises a first imaging mirror 7 and a first reflecting mirror 6, wherein the first reflecting mirror 6 is arranged between the light source 1 and the focusing lens group 3, and the first light sensing module is correspondingly arranged on 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 entering 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 will be appreciated that by disposing the first reflecting mirror 6 between the light source 1 and the focusing lens group 3, the folded-back light can be collected conveniently, and the collected folded-back light can be projected smoothly onto the first light-sensing module for real-time imaging under the imaging action of the first imaging mirror 7.
In one embodiment, as shown in fig. 1 to fig. 3 and fig. 8, the imaging device further comprises a second imaging mirror 9 and a second light sensing module, specifically, the first light sensing module and the second light sensing module respectively comprise a first CCD array 8 and a second CCD array 11, the returning light is respectively reflected to the light entering sides of the first imaging mirror 7 and the second imaging mirror 9 through different directions, the returning light in different directions is respectively projected to the first CCD array 8 and the second CCD array 11 through the light emitting 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 focusing point, and the second CCD array 11 is located at a non-ideal focusing point.
It will be appreciated that the second imaging mirror 9 may be used to make the return light smoothly cast on the second CCD array 11 to implement real-time imaging, as shown in fig. 3 and 8, the first CCD array 8 is set at the conjugate point B, and meanwhile, the second CCD array 11 is set at the non-conjugate point B (front focal position or back focal position), after the return light is cast to the first CCD array 8 and the back 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, it may be directly determined whether the real-time imaging is in front focal or back focal, so as to determine the focusing direction, if the front focal virtual image is formed, the focusing system needs to drive the focusing lens set 3 to move toward the light source 1, if the front focal virtual image is formed, and if the front focal virtual image is formed, the focusing system needs to drive the focusing lens set 3 to move toward the direction away from the light source 1, and away from the light source 1, so that the real-time focusing point of the real-time imaging is gradually moved toward the ideal focal point B step by step, and accurate automatic focusing is completed.
In one embodiment, the return light entering the first light sensing module and the second light sensing module respectively forms images on the first CCD array 8 and the second CCD array 11 in real time, and it can be understood that the positions of real-time imaging can be accurately displayed by using the CCD arrays, so that accurate detection of the focusing system is facilitated, and focusing accuracy can be improved.
In one embodiment, as shown in fig. 4, the optical fiber reflection mirror further includes a second mirror 10, where the first mirror 6 and the second mirror 10 form a certain included angle with each other, and the first mirror 6 and the second mirror 10 respectively reflect the reflection light to the light incident sides of the first imaging mirror 7 and the second mirror 10 respectively in different directions.
It can be understood that the first reflecting mirror 6 and the second reflecting mirror 10 are arranged between the focusing lens group 3 and the focal plane 2 to form a certain included angle, so that multiple light beams from different directions can be effectively collected, the multiple light beams from different directions are respectively reflected to the light entering sides of the first imaging lens 7 and the second reflecting mirror 10, and finally the first CCD array 8 and the second CCD array 11 at different positions can respectively receive the returned light, so that the real-time imaging assisting focusing system on the first CCD array 8 and the second CCD array 11 can be used for judging focusing.
In one embodiment, as shown in fig. 1-4, the center of the first mirror 6 is located at the focal position of the light source 1.
In one embodiment, as shown in connection with fig. 4, the first reflecting mirror 6 and the second reflecting mirror 10 are semi-reflecting mirrors, the front sides of the first reflecting mirror 6 and the second reflecting mirror 10 are reflecting surfaces, the reflecting surfaces correspond to the focusing lens group 3 forwards, the rear sides of the first reflecting mirror 6 and the second reflecting mirror 10 are non-reflecting surfaces, the non-reflecting surfaces correspond to the focal plane 2 backwards, and the reflecting mirrors 6 are semi-reflecting mirrors, so that a light source can be allowed to pass through, a light beam penetrating from the focal plane 2 can be prevented from being shielded, normal projection of stage lamps is ensured, the reflecting effect can be achieved, and the use is convenient.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," 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 the embodiments of the invention. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. The optical focusing method of the stage lamp is characterized by collecting the returned light of the focal plane of the returned light source from the projection light spot through the focusing lens group, imaging the returned light on the first light sensing module in real time, and adjusting the position of the focusing lens group by the focusing system according to the real-time imaging to enable the real-time focusing point of the returned light to coincide with an ideal focusing point, wherein the ideal focusing point is the focal point of the light source or the conjugate point of the focal point;
the first light sensing module is positioned at the ideal focusing point;
and utilizing a second light sensing module to collect the returning light simultaneously, wherein the second light sensing module is positioned at a non-ideal focusing point, judging whether the returning light forms a front Jiao Xuxiang or rear focal virtual image in the first light sensing module according to real-time imaging on the first light sensing module and the second light sensing module respectively, and then correspondingly moving the focusing lens group.
2. The method of claim 1, wherein the first mirror is used to reflect the folded light to the first imaging mirror and image the folded light in real time on the first light sensing module on the other side of the first imaging mirror.
3. An optical focusing method of stage lamp according to claim 1, wherein the focusing system calculates the offset position of the real-time focal point of the returning light with respect to the ideal focal point from the real-time imaging.
4. An optical focusing method of stage lamp according to claim 3, wherein the focusing system calculates a focusing distance of the focusing lens group according to a phase difference between the real-time focusing point and the ideal focusing point, and fine-tuning compensation is further performed on the focusing lens group according to a preset value after the focusing lens group is moved by a corresponding distance.
5. The method according to claim 1, wherein the position of the focusing lens group is changed, whether the returned light forms a front Jiao Xuxiang or a back virtual image in the first light sensing module is determined according to the change of the real-time imaging, and then the focusing lens group is correspondingly moved.
6. The method of claim 1, wherein the return light is reflected to the second imaging mirror by the second mirror and imaged in real time on the second light sensing module on the other side of the second imaging mirror.
7. The method according to claim 1 or 5, wherein the focusing system compares the real-time imaging light parameter with a preset light parameter, and stops moving the focusing lens group when the real-time imaging light parameter reaches the preset light parameter.
8. Stage lamp optical system for implementing the method according to any one of claims 1 to 7, comprising a focusing system and a light source (1), a focal plane (2) being formed in the light exit direction of the light source (1), and a focusing lens group (3), a magnifying lens group (4) and a light exit lens group (5) being arranged in sequence after the focal plane (2), characterized in that it further comprises:
a first light sensing module;
the return light 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 real-time imaging parameters on the first light sensing module.
9. The stage optical system of claim 8, further comprising:
a first imaging mirror (7);
the first reflecting mirror (6) is arranged between the light source (1) and the focusing lens group (3), and the first light sensing module is correspondingly arranged on the light emitting side of the first imaging mirror (7);
the first reflecting mirror (6) receives the returning light and reflects the returning light to the light inlet side of the first imaging mirror (7), and the returning light is projected to the first light sensing module through the light outlet side of the first imaging mirror (7) so as to image on the first light sensing module in real time.
10. The stage lighting optical system of claim 9, further comprising a second light sensing module, wherein the return light is imaged in real time on the first light sensing module and the second light sensing module, respectively, by different projection directions, the first light sensing module being positioned at an ideal focal point and the second light sensing module being positioned at a non-ideal focal point.
11. Stage lighting optical system according to claim 10, further comprising a second imaging mirror (9), wherein the returning light is reflected to the light entrance sides of the first imaging mirror (7) and the second imaging mirror (9) respectively by different projection directions, and the returning light in different directions is projected to the first light sensing module and the second light sensing module respectively by the light exit sides of the first imaging mirror (7) and the second imaging mirror (9) respectively, so as to image on the first light sensing module and the second light sensing module respectively in real time.
12. Stage lighting optical system according to claim 11, characterized in that it further comprises a second mirror (10), said first mirror (6) and said second mirror (10) forming an angle with each other, said first mirror (6) and said second mirror (10) reflecting said return light in different directions to the light entrance side of said first imaging mirror (7) and said second imaging mirror (9), respectively.
13. Stage lighting optical system according to claim 10, characterized in that the first and second light sensing modules comprise a first CCD array (8) and a second CCD array (11), respectively, and that the return light entering the first and second light sensing modules is imaged in real time on the first and second CCD arrays (8, 11), respectively.
14. Stage optical system according to claim 9, characterized in that the centre of the first mirror (6) is located at the focal position of the light source (1).
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN202111670255.5A CN114321840B (en) | 2021-12-31 | 2021-12-31 | Stage lamp optical focusing method and stage lamp optical system |
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| CN114321840B true CN114321840B (en) | 2023-08-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003315666A (en) * | 2002-04-25 | 2003-11-06 | Seiko Instruments Inc | Focusing function for projection optical device |
| JP2005202092A (en) * | 2004-01-15 | 2005-07-28 | Hitachi Kokusai Electric Inc | Focusing point detecting method and optical microscope using the same |
| CN104024935A (en) * | 2012-11-30 | 2014-09-03 | 神画科技（深圳）有限公司 | Projection System With Infrared Monitoring |
| CN105100581A (en) * | 2014-05-23 | 2015-11-25 | 株式会社山野光学 | Zooming lens device |
| JP2016109810A (en) * | 2014-12-04 | 2016-06-20 | 株式会社リコー | Projection lens and image display device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8023037B2 (en) * | 2006-12-28 | 2011-09-20 | Victor Company Of Japan, Ltd. | Focus-adjustment signal generating apparatus and method, and imaging apparatus and method with manual focus adjustments |
| JP5374953B2 (en) * | 2008-07-30 | 2013-12-25 | セイコーエプソン株式会社 | Projector and projector control method |
| CN102636939A (en) * | 2011-02-11 | 2012-08-15 | 中强光电股份有限公司 | Projection system |
| CN107143780B (en) * | 2017-06-20 | 2019-07-12 | 上海兰宇文化传播发展有限公司 | Dynamic stage shot-light system |
| CN107743194B (en) * | 2017-09-30 | 2020-12-04 | 广州市浩洋电子股份有限公司 | Stage lamp automatic focusing system and method based on image processing |
| CN108087762A (en) * | 2017-11-24 | 2018-05-29 | 广州祥明舞台灯光设备有限公司 | A kind of stage lighting of auto-focusing |
| CN110793000B (en) * | 2019-10-31 | 2022-01-18 | 广州市浩洋电子股份有限公司 | Intelligent focusing method for head shaking computer lamp based on machine vision |
| CN114321840B (en) * | 2021-12-31 | 2023-08-29 | 广州市浩洋电子股份有限公司 | Stage lamp optical focusing method and stage lamp optical system |
-
2021
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-
2022
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003315666A (en) * | 2002-04-25 | 2003-11-06 | Seiko Instruments Inc | Focusing function for projection optical device |
| JP2005202092A (en) * | 2004-01-15 | 2005-07-28 | Hitachi Kokusai Electric Inc | Focusing point detecting method and optical microscope using the same |
| CN104024935A (en) * | 2012-11-30 | 2014-09-03 | 神画科技（深圳）有限公司 | Projection System With Infrared Monitoring |
| CN105100581A (en) * | 2014-05-23 | 2015-11-25 | 株式会社山野光学 | Zooming lens device |
| JP2016109810A (en) * | 2014-12-04 | 2016-06-20 | 株式会社リコー | Projection lens and image display device |
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