Optical system for automatic lighting device

Abstract

The zoom optical system comprises a light source, a focusing lens group, a zoom lens group and a fixed lens group. The light source illuminates an object in the object plane or an object adjacent to the object plane. The focusing lens group has a first positive optical power and moves to focus an object. The focusing lens group comprises a positive optical power lens, a positive optical power lens, a positive optical power lens and a negative optical power lens. The zoom lens group has a negative optical power and moves with respect to the object plane and the focus lens group to control the beam angle while the focus lens group remains fixed with respect to the object plane. The zoom lens group comprises two negative power lenses. The fixed lens group has a second positive optical power, is held at a fixed position with respect to the object plane, and projects an image of the object. The fixed lens group has three lenses including a negative optical power, a positive optical power, and a positive optical power.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 63 / 579,734, filed on August 30, 2023, entitled “OPTICAL SYSTEM FOR AN AUTOMATED LUMINAIRE,” the entire contents of which are hereby incorporated by reference. Technical Field

[0003] The present disclosure relates generally to lighting devices and, more particularly, to optical systems for automated lighting devices. Background Art

[0004] Some lighting fixtures in the entertainment and architectural lighting markets include automatic and remotely controllable features. Such lighting fixtures may be used in theaters, television studios, concerts, theme parks, nightclubs, and other venues. The lighting fixture may provide control over the pan and tilt functions of the lighting fixture, allowing the operator to control the direction in which the lighting fixture is pointed, thereby controlling the position of the light beam on the stage or in the studio. This position control may be obtained via control of the position of the lighting fixture on two orthogonal rotational axes, which may be referred to as pan and tilt. Some lighting fixtures also provide control over other parameters such as intensity, color, focus, beam size, beam shape, and / or beam pattern.

[0005] The optical system of such automatic lighting devices can be designed to enable the user to control the beam size, from a very narrow output beam to a wide beam (or "wash"). Such control can allow such lighting devices to be used for light effects that project a targeted or nearly parallel beam of light at a distance, as well as for wider, more traditional wash effects. Optical systems that have the ability to produce narrow beams of light may be referred to as "beam" optics, while optical systems that have the ability to produce wide beams of light may be referred to as "wash" optics. Summary of the invention

[0006] The zoom optical system includes a light source, a focusing lens group, a zoom lens group and a fixed lens group. The light source is configured to illuminate an object located in an object plane of the zoom optical system or an object in a plane adjacent to the object plane. The focusing lens group is optically connected to the object without intervening lenses, has a first positive optical power, and is configured to move relative to the object plane to control whether the object is focused. The focusing lens group includes four lenses, which include a positive optical power lens, a positive optical power lens, a positive optical power lens, and a negative optical power lens listed in sequence from the lens closest to the object plane in the focusing lens group. The zoom lens group is optically connected to the focusing lens group without intervening lenses, has negative optical power, and is configured to move relative to the object plane and the focusing lens group. The zoom lens group is configured to move to control the beam angle, while the focusing lens group remains in a fixed position relative to the object plane. The zoom lens group includes two lenses, both of which include negative power lenses. The fixed lens group is optically connected to the zoom lens group without intervening lenses, has a second positive optical power, and is configured to remain in a fixed position relative to the object plane and project an image of the object. The fixed lens group includes three lenses, which include a negative optical power lens, a positive optical power lens, and a positive optical power lens listed in order from the lens closest to the object plane in the fixed lens group.

[0007] An automatic lighting device includes a light source, a zoom optical system and a controller. The light source is configured to emit a first light beam and illuminate an object located in an object plane of the automatic lighting device or an object in a plane adjacent to the object plane. The zoom optical system is optically connected to the light source and includes a focusing lens group, a zoom lens group and a fixed lens group. The focusing lens group has a first positive optical power and is configured to receive a first light beam modified by an object, emit a second light beam, and move relative to the object to control whether the object is focused. The focusing lens group includes four lenses, which include a positive optical power lens, a positive optical power lens, a positive optical power lens and a negative optical power lens listed in sequence starting from the lens closest to the object plane in the focusing lens group. The zoom lens group has a negative optical power and is configured to receive a second light beam, emit a third light beam, and move to control the beam angle, while the focusing lens group remains in a fixed position relative to the object. The zoom lens group includes two lenses, both of which include negative power lenses. The fixed lens group has a second positive optical power, is configured to receive a third light beam, project an image of the object, and remain in a fixed position relative to the object. The fixed lens group includes three lenses, the three lenses including a negative optical power lens, a positive optical power lens, and a positive optical power lens listed in order from the lens closest to the object plane in the fixed lens group. The controller is connected to the focus lens group and the zoom lens group and is configured to independently move the focus lens group and the zoom lens group along the optical axis of the zoom optical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more fully understand the present disclosure, a brief description is now provided below in conjunction with the accompanying drawings, wherein like reference numerals represent like features.

[0009] Figure 1 illustrates a side view of a zoom optical system in accordance with the present disclosure in a first configuration;

[0010] Figure 2 Shown Figure 1 An exploded isometric view of a zoom optical system in which the elements of the lens groups are separated from each other;

[0011] Figure 3 Shown Figure 1 A cross-sectional side view of a zoom optical system;

[0012] Figure 4 shows a cross-sectional side view of a second zoom optical system according to the present disclosure;

[0013] Figure 5 Shown Figure 4 An exploded isometric view of a second zoom optical system;

[0014] Fig. 6A shows an isometric view of a first light effect ring according to the present disclosure;

[0015] Figure 6B shows a cross-sectional side view of a portion of a second zoom optical system according to the present disclosure;

[0016] Figure 7 shows a front view of a second light effect ring in a first configuration according to the present disclosure;

[0017] Figure 8 showing a front view of the second light effect ring in a second configuration;

[0018] Fig. 9 shows a side view of a third zoom optical system according to the present disclosure;

[0019] Fig.10 Shown Fig. 9 A side view of a zoom optical system; and

[0020] Fig.11 An isometric view of a lighting device according to the present disclosure is shown. DETAILED DESCRIPTION

[0021] Preferred embodiments are illustrated in the drawings, wherein like reference numerals are used to designate like and corresponding parts throughout the several views.

[0022] Some zoom optical systems include a large number of lenses, which may make these zoom optical systems heavier, larger, and / or more expensive to produce. Embodiments of zoom optical systems according to the present disclosure include only nine lenses, making them potentially lighter, smaller, and less expensive than such other zoom optical systems. Additionally, other zoom optical systems may include aspherical lenses, which may be more expensive to manufacture. Embodiments of zoom optical systems according to the present disclosure include only spherical lenses (where non-planar lens surfaces are used), making them potentially less expensive than such other zoom optical systems.

[0023] Some lighting fixtures in a lighting system may be visible to audience members and thus become part of the stage for the performance. When the audience looks at the front of the head of the lighting fixture, they may see a fixed lens through which a beam of light is emitted, and may see something of the housing of the lighting fixture, depending on the ambient brightness. The emitted beam of light may be narrow or wide, and the lens may be slightly illuminated by the emitted beam of light.

[0024] Such lighting fixtures do not allow the operator to independently control the appearance in front of the head of the lighting fixture, as compared to the control an operator can have over the appearance of other scenery and truss elements equipped with (e.g., color-controllable strip lighting). A light effects ring according to the present disclosure provides the operator with such control: when the audience views the lighting fixture, one or more colors can be seen in the front-most lens of the lighting fixture, if desired. The ring can present a solid color or a color pattern, the effect can be static or changing ("dynamic"), and can have a desired intensity, all under the control of the operator.

[0025] Figure 1 A side view of a zoom optical system 100 in a first configuration according to the present disclosure is shown. The zoom optical system 100 includes a light source 105 and an object plane 103. The zoom optical system 100 includes an optical axis 150. One or more objects to be imaged by the zoom optical system 100 are located in or adjacent to the object plane 103. Examples of objects to be imaged include static or rotating patterns mounted on a pattern wheel or other pattern carrier, and a variable aperture, aperture wheel, or other mechanism for producing a light beam of a selected size. When more than one such object to be imaged is included in the zoom optical system 100, it is understood that the objects can be located in various planes adjacent to the object plane 103. As shown in FIG. Figure 1 As shown, the left end of the zoom optical system 100 may be referred to as an object end, and the right end may be referred to as an imaging end.

[0026] Zoom optical system 100 further includes nine lenses in three lens groups: lenses 102, 104, and 106 ("objective lens" group); lenses 108 and 110 ("variable mirror" group); and lenses 112, 114, 116, and 118 ("compensating mirror" group). Figure 1 The lens elements of the illustrated embodiment are described in Table 1. As described below, Figures 2 to 5 Also shown are lenses of the zoom optical system 100. The Group column of Table 1 indicates the lens group of each lens element.

[0027] The columns Diameter, R1, and R2 show the shape of each lens element, where "mm" indicates that the measurement is in millimeters (mm). R1 ​​describes the image side of the lens element ( Figure 1 The curvature of the lens element on the object side ( Figure 1 The curvature of Figure 3 As can be seen from , a positive value of R1 indicates a convex imaging side surface of the lens element, and a negative value of R1 indicates a concave imaging side surface of the lens element. Figure 3 It can also be seen that a positive value of R2 indicates a concave object-side surface of the lens element and a negative value of R2 indicates a convex object-side surface of the lens element. For purposes of this disclosure, radii of curvature within 10% of a disclosed radius are considered to be substantially equal to the disclosed radii of curvature.

[0028] The Spacing column indicates the spacing of the elements within the lens group, where the unit of measurement is millimeters. The Glass Type column specifies the type of glass material used for each lens. Glass Type values ​​containing the letter "F" indicate lenses made of flint glass. Glass Type values ​​containing the letter "K" indicate glasses made of crown glass. The Power column indicates whether the lens element has positive or negative optical power.

[0029] Table 1

[0030]

[0031]

[0032] In some embodiments, all of the objective lens group, the variable mirror lens group, and the compensating mirror lens group are configured to move relative to each other and the object plane 103 along the optical axis 150 of the zoom optical system 100. In other embodiments, the lens 102 of the objective lens group is fixed in place in the illumination device 1100 (see FIG. Fig.11In such an embodiment, the objective lens group is configured not to move and remain in a fixed position on the optical axis, while the variable mirror lens group and the compensating mirror lens group are configured to move. As will be shown in more detail in subsequent figures, when the lens groups move relative to each other along the optical axis, the lenses within each lens group remain in the same position relative to each other.

[0033] The compensator lens group lenses form a converging (or positive power) group, the variable lens group lenses form a diverging (or negative power) group, and the objective lens group lenses form a converging group. The compensator lens group, the variable lens group, and the objective lens group of the zoom optical system 100 have four, two, and three lenses, respectively. Those skilled in the art will recognize that in other embodiments, the positive lens group / negative lens group / positive compensator lens group / variable lens group / objective lens group may include lens groups each having more or less than four / two / three lenses, including lens "groups" with only a single lens.

[0034] A first light beam emitted by the light source 105 converges and illuminates an object to be imaged located in the object plane 103, and then the light beam diverges when approaching the compensating mirror lens group. The compensating mirror lens group receives the first light beam, is modified by any object placed in the first light beam in the object plane 103, and emits a second light beam. The variable mirror lens group receives the second light beam and emits a third light beam. The objective lens group receives the third light beam and emits a fourth light beam, which is a light beam emitted by the zoom optical system 100. Therefore, it can be said that each of the compensating mirror lens group, the variable mirror lens group, and the objective lens group is optically connected to its previous optical element in the zoom optical system 100, and it can be said that the light beam received by each lens group originates from the light source 105.

[0035] In various embodiments, as described above, the objective lens group moves along the optical axis of the zoom optical system 100 or remains in a fixed position relative to the object plane 103. The variable mirror lens group and the compensating mirror lens group both move independently along the optical axis. The movement of the variable mirror lens group primarily controls the overall focal length (light output angle or beam angle) of the emitted light beam. For example, when the compensating mirror lens group is maintained in a fixed position relative to the object plane, the movement of the variable mirror lens group changes the beam angle of the emitted light beam. The movement of the compensating mirror lens group relative to the object plane primarily controls whether an object in the object plane 103 or an object in a plane adjacent to the object plane 103 is focused. The positions of the compensating mirror lens group and the variable mirror lens group combine to determine the beam angle (or zoom) of the emitted light beam, as well as the distance of the objective lens group from which the projected image of the object plane is focused at the objective lens group. Therefore, the compensating mirror lens group and the variable mirror lens group may also be referred to as a focusing lens group and a zoom lens group, respectively. In an embodiment in which the objective lens group is maintained in a fixed position relative to the object plane 103, the objective lens group may be referred to as a fixed lens group.

[0036] Moving the focusing lens group and the zoom lens group affects zooming and focusing, and moving the objective lens group also affects zooming and focusing, but the effect of moving the objective lens group on the beam angle is greater than the effect on the distance of the objective lens group from the object plane where the projected image is focused. Using a zoom optical system with three lens groups, it is possible to design an illumination device having the following lens groups: any one of the lens groups is in a fixed position, and the other two lens groups are configured to move relative to the fixed lens group.

[0037] The moving lens group can be mechanically coupled to a manually operated manual control or mechanically coupled to a motor, linear actuator, or other electromechanical mechanism for movement. Such an electromechanical mechanism can be electrically coupled to a control system (or controller) 1110 of the lighting device 1100, and the control system 1110 is configured to control the movement of the electromechanical mechanism and thus the lens group. In various embodiments, the control system 1110 includes a microcontroller or other programmable processing system. In some embodiments, the control system 1110 can be coupled to a user interface 1112 included in the lighting device 1100 for local control and is configured to receive signals therefrom related to the desired position of the electromechanical mechanism.

[0038] In other embodiments, the control system 1110 can be connected to a remotely located control console by a data link (wired or wireless) for remote control, and receive signals indicating the desired positions of the lens groups for the zoom optical system 100 along the optical axis. The data link can use the DMX512 (digital multiplexing) protocol or other suitable communication protocols, such as Art-Net, ACN (control network architecture) and stream ACN. In such embodiments, the control system 1110 is configured to move the focus lens group and / or the zoom lens group in response to signals received via the data link. In some such embodiments, the control system 1110 moves the compensating mirror lens group in response to control signals received on a first control channel of the data link, and moves the variable mirror lens group in response to control signals received on a second control channel of the data link.

[0039] Figure 2 Shown Figure 1 1 is an exploded isometric view of a zoom optical system 100, wherein the elements of the lens groups are separated from one another. As described above, the zoom optical system 100 is coaxially positioned with a light source located at one end of the zoom optical system 100 where the lens 118 is located. The zoom optical system 100 generates a light beam emitted from the lens 102. The compensator lens group is optically coupled to one or more objects in the object plane 103 without intervening lenses. Figure 2 As can be seen in FIG, the variable mirror lens group is coupled to the compensating mirror lens group without intervening lenses, and the objective lens group is coupled to the variable mirror lens group without intervening lenses. The objective lens group projects an image of one or more objects in the object plane without further intervening lenses.

[0040] Figure 3 Shown Figure 1 FIG. 1 is a cross-sectional side view of the zoom optical system 100. Figure 3 In the embodiment, the lens group is positioned to produce a first configuration with a wide angle light beam. Figure 4 A side view of a second zoom optical system 400 is shown. The zoom optical system 400 includes the lens group of the zoom optical system 100 and the first light effect ring 120. Figure 4 A cross-sectional side view of a second configuration showing a lens group positioned to produce a narrow angle beam is shown. Figures 5 to 8 Light effect ring 120 is discussed in further detail. In various embodiments, light effect ring 120 may be configured for movement along the optical axis, and the movement may be controlled to configure zoom optical system 100 such that light effect ring 120 is located anywhere between lenses 104 and 102.

[0041] Figure 5 Shown Figure 44 is an exploded isometric view of the zoom optical system 400. As described above, the zoom optical system 400 includes the lens group of the zoom optical system 100 and the light effect ring 120. Figure 5 In the illustrated embodiment, light effect ring 120 is positioned between lenses 102 and 104. In other embodiments, light effect ring 120 may be positioned at any point in zoom optical system 400.

[0042] Fig. 6A An isometric view of a light effect ring 120 according to the present disclosure is shown. The light effect ring 120 comprises a cylinder having an axis, the cylinder having an inner surface 126 and an outer surface 128. Fig. 6A In the illustrated embodiment, the axis of the light effect ring 120 is colinear with the optical axis 150. In various embodiments, the axis of the light effect ring 120 can be parallel to the optical axis and offset from the optical axis, or can form an angle with the optical axis. Fig. 6A The left edge shown in FIG. 1 ) extends toward the axis of the light effect ring 120 .

[0043] The first plurality of light emitters 122 are mounted on the inner surface 126 and emit light toward the center of the light effect ring 120. The second plurality of light emitters 124 are mounted on a surface facing the edge 130 of the lens 102 and are configured to emit light toward the lens 102 (i.e., toward the front edge of the light effect ring 120 (e.g., Fig. 6A Other embodiments may include a plurality of light emitters greater than or less than two and / or light emitters that emit light in more or fewer directions than toward the center and toward the front.

[0044] In various embodiments, the light emitters 122 and 124 may include one or more individual light emitting diodes (LEDs) or other light emitting devices. When the light emitters 122 and 124 include multiple LEDs, the LEDs may emit light of the same color or multiple colors. In some embodiments, the LEDs are red, green, blue, and white. In other embodiments, any combination of red, green, blue, amber, yellowish green, dark blue, and cyan LEDs may be used. In still other embodiments, any combination and number of color or white LEDs may be used. Examples of such other embodiments include any combination of two or more red, green, blue, amber, warm white, cool white, or tunable white mixed colors. The light emitters 122 and 124 may be electrically coupled to a control system 1110 for local or remote control of their brightness and / or color, as described with reference to FIG. Figure 1 The movement of the zoom optical system 100 is controlled as described. The brightness and / or color of the light emitters 122 and 124 can be controlled by the control system 1110 independently, in groups, or collectively.

[0045] Figure 6B A cross-sectional side view of a portion of a zoom optical system 400 in accordance with the present disclosure is shown. Figure 6B The light effect ring 120 and Figure 4 In various embodiments, the light effect ring 120 may be positioned anywhere between the lenses 102 and 104—for example, a position adjacent to the lens 104 (e.g., Figure 6B ), between lenses 104 and 102 (as shown in Figure 4 As shown), or a position adjacent to lens 102. As described above, light effect ring 120 can be configured to move to any position between lenses 104 and 102 along the optical axis. Figure 4 , a portion of the light beam 700 between lenses 104 and 102 is shown, indicating the position of the light effect ring 120 relative to the light beam 700. The light effect ring 120 may cover the outer portion of the light beam 700. Similarly, in Figure 6B In the shown position, the light effect ring 120 may cover an outer portion of the light beam of the zoom optical system 400 .

[0046] Depending on the position of light effect ring 120 relative to lenses 102 and 104, light emitters 122 and 124 illuminate one or both of lenses 102 and 104 to produce an effect that is visible to a viewer outside of lighting device 1100. Light beam 123 emitted by light emitter 122 illuminates a surface of one or both of lenses 102 and 104 (e.g., a portion of the front surface of lens 104 and a portion of the back surface of lens 102) at an angle. For purposes of this application, the term "oblique" is defined as a light beam striking a point on a surface at an angle greater than thirty degrees (30°) from the surface normal (i.e., from a vector perpendicular to the surface at that point). Light beam 123 represents only the portion of light emitted by light effect ring 120 (e.g., the portion of the front surface of lens 104 and the portion of the back surface of lens 102). Figure 6B ), but light emitters 122 in other parts of the light effect ring 120 will emit similar light beams 123 across lenses 102 and 104 in other directions.

[0047] exist Figure 6B In the embodiment shown, the light emitter 122 illuminates both lenses 102 and 104 with an oblique light beam 123. In embodiments where the light effect ring 120 is positioned closer to the lens 102, the light beam 123 may illuminate only the back side of the lens 102 obliquely.

[0048] Light emitter 124 emits light beam 125 which passes through lens 102. Light beams 123 and 125 illuminate the rear surface of lens 102 and pass through lens 102 to be emitted from lighting device 1100. Light beam 125 only represents the light emitted by the bottom portion of light effect ring 120 (eg, Figure 6B ), but light emitters 124 in other parts of the light effect ring 120 will emit similar light beams 125 from other locations around the light effect ring 120 through the lens 102. In other embodiments, the light effect ring 120 can be used with other types of optical systems (such as fixed focus optical systems) to produce visible effects in the exit lenses of such optical systems.

[0049] Figure 7 and Figure 8 A front view of a second light effect ring 200 according to the present disclosure is shown positioned in a first configuration and a second configuration, respectively. Light effect ring 200 is configured to move within lighting device 1100 to enter or leave a position within light beam 700. Light effect ring 200 includes light emitters 222 and 224, similar to light emitters 122 and 124 of light effect ring 120. Light effect ring 200 is moved to enter or leave a position within light beam 700 so that an operator can select whether light emitters 222 and 224 are visible in light beam 700.

[0050] To facilitate movement into and out of the light beam 700, the light effect ring 200 includes a plurality of physical segments that are configured to move independently or collectively toward and away from a reference. Fig. 9 and Fig.10 The optical axis of the zoom optical system 900 is moved. In some embodiments, the segments are configured to move independently or collectively parallel to the optical axis 150. The light effect ring 200 is divided into four physical segments: 202, 204, 206 and 208, each of which includes a subset of light emitters 222 and a subset of light emitters 224. Each segment 202, 204, 206 and 208 is configured to move to enter or leave the light beam 700.

[0051] When all segments 202, 204, 206, 208 are moved into the light beam 700, the light effect ring 200 comprises a segmented cylinder having an axis, the cylinder segment having an inner face and an outer face. The axis of the light effect ring 200 is colinear with the optical axis 150. The edge comprises an edge segment extending from the edge of each segment of the light effect ring toward the axis of the light effect ring 200. The light emitter 222 is mounted on the inner face of the cylinder segment, and the light emitter 224 is mounted on the face of the edge segment facing the lens 102.

[0052] Figure 7Segments 202 , 204 , 206 and 208 of light effect ring 200 are shown in a first configuration, in which they are located outside of light beam 700 . Figure 8 Segmentation 202,204,206 and 208 of light effect ring 200 in the second configuration is shown, wherein they have been assembled to form the uninterrupted light effect ring 200 positioned in light beam 700. In some embodiments, light effect ring 200 can be divided into segments of different sizes. In other embodiments, light effect ring 200 can be divided into the segments of other quantities outside four segments. In various embodiments, each light effect ring segment can be controlled to move into or leave optical path independently or in various grouping modes. For example, in the third configuration, segments 202 and 206 can be moved into light beam 700, and segments 204 and 208 can move outside of light beam 700.

[0053] The moving segments 202, 204, 206, 208 may be mechanically coupled to a manually operated manual control or mechanically coupled to a motor, linear actuator, or other electromechanical mechanism for movement. As discussed above with reference to the moving lens group, the electromechanical mechanism physically coupled to the moving segments 202, 204, 206, 208 may be electrically coupled to a control system (or controller) 1110 of the lighting device 1100, wherein the control system 1110 is configured to control the movement of the electromechanical mechanism, thereby controlling the movement of the moving segments 202, 204, 206, 208 into and out of the light beam 700. In various embodiments, the control system 1110 may be coupled to a user interface 1112 for local control or to a data link for remote control. In various such embodiments, the control system 1110 is configured to move the moving segments 202, 204, 206, 208 independently, in groups, or collectively in response to signals received over one or more control channels via a data link.

[0054] Fig. 9 1 shows a side view of a third zoom optical system 900 according to the present disclosure. The third zoom optical system 900 includes a lens group of the zoom optical system 100 and a light effect ring 200. The lens group of the zoom optical system 100 is in the second configuration (refer to Figure 4 ) shows that the light effect ring 200 is in a first configuration (refer to Figure 7 ) is shown in which the halo segments are moved out of the beam 700. It can be seen that segment 202 has been moved above the beam 700 and segment 206 has been moved below the beam 700. Segments 204 and 208 have also been moved out of the beam 700 in directions away from and into the page, respectively. Fig.10 Shown Fig. 9 A side view of the zoom optical system 900 is shown. Fig.10, the lens group of the zoom optical system 100 is shown in the second configuration, and the second light effect ring 200 is shown in the second configuration (refer to Figure 7 described), is moved into the light beam 700.

[0055] As described for the lens group of zoom optical system 100, light effect ring segments 202, 204, 206 and 208 can be coupled to motors, linear actuators, or other electromechanical mechanisms for movement. Such electromechanical mechanisms can be electrically coupled to a control system of lighting device 1100 (for local control or remote control), as described with reference to Figure 1 The zoom optical system 100 is described.

[0056] Although the light effect rings 120 and 200 are circular or circular segments, in other embodiments, the light effects according to the present disclosure may have other shapes or other segmented shapes. In various embodiments, the light effect rings or assembled segments may be square, triangular, hexagonal, elliptical, leaf-shaped, or any combination of such linear and / or circular shapes.

[0057] Fig.11 An isometric view of a lighting device 1100 according to the present disclosure is shown. The lighting device 1100 is an automatic lighting device including a head 1128, which includes any of the zoom optical systems 100 or any of the zoom optical systems 400 or 900 with the light effect rings 120 or 200. The head 1128 is coupled to a yoke 1120 by a tilt mechanism and is configured to rotate within the yoke 1120 around a tilt axis 1124. The yoke 1120 is coupled to a fixed housing 1126 by a translation mechanism and is configured to rotate relative to the fixed housing 1126 around a translation axis 1122. The translation axis 1122 and the tilt axis 1124 are orthogonal to each other. The lighting device 1100 further includes a reference Figure 1 The control system 1110 and the user interface 1112 of the zoom optical system 100 are shown. The control system 1110 is located inside the lighting device 1100. Fig.11 Not visible in.

[0058] One or both of the translation mechanism and the tilt mechanism are mechanically coupled to a manually operated manual control or mechanically coupled to a motor, linear actuator, or other mechanism controlled by an electromechanical system. Such an electromechanical mechanism may be electrically coupled to a control system 1110 (for local control or remote control), as described with reference to Figure 1 The zoom optical system 100 is described.

[0059] Although only some embodiments of the present disclosure have been described herein, those skilled in the art who benefit from the present disclosure will appreciate that other embodiments can be designed without departing from the scope disclosed herein. Although the present disclosure has been described in detail, it should be understood that various changes, substitutions and modifications can be made thereto without departing from the spirit and scope of the present disclosure.

Claims

1. A zoom optical system, comprising: a light source configured to illuminate an object located in an object plane of the zoom optical system or in a plane adjacent to the object plane; a focusing lens group, the focusing lens group being optically coupled to the object without an intervening lens, the focusing lens group having a first positive optical power and being configured to move relative to the object plane to control whether the object is focused, the focusing lens group comprising four lenses, the four lenses comprising a positive optical power lens, a positive optical power lens, a positive optical power lens, and a negative optical power lens, listed in order from the lens in the focusing lens group closest to the object plane; a zoom lens group, the zoom lens group being optically coupled to the focus lens group without an intervening lens, the zoom lens group having negative optical power and being configured to move relative to the object plane and the focus lens group, the zoom lens group being configured to move to control a beam angle while the focus lens group remains in a fixed position relative to the object plane, the zoom lens group comprising two lenses, both of which comprise negative power lenses; as well as A fixed lens group, the fixed lens group is optically connected to the zoom lens group without an intervening lens, the fixed lens group has a second positive optical power and is configured to remain in a fixed position relative to the object plane and project an image of the object, the fixed lens group includes three lenses, and the three lenses include a negative optical power lens, a positive optical power lens, and a positive optical power lens listed in sequence starting from the lens closest to the object plane in the fixed lens group.

2. The zoom optical system of claim 1, wherein the focus lens group and the zoom lens group are further configured to be moved to a selected position relative to each other by an operator of the zoom optical system.

3. The zoom optical system of claim 1, wherein the focus lens group and the zoom lens group are configured to be moved to selected positions relative to each other by a remotely located operator of the zoom optical system.

4. The zoom optical system according to any one of claims 1 to 3, wherein: The four lenses of the focusing lens group include a crown glass, a flint glass, a crown glass and a flint glass listed in order from the lens closest to the object plane in the focusing lens group; Both lenses of the zoom lens group include crown glass; and The three lenses of the fixed lens group include a flint glass, a crown glass, and a crown glass, listed in order from the lens closest to the object plane in the fixed lens group.

5. The zoom optical system according to claim 4, wherein: The four lenses of the focusing lens group include glasses of the types H-K9L, H-ZFL7A, H-K9L and H-ZFL7A listed in order from the lens closest to the object plane in the focusing lens group; The two lenses of the zoom lens group include H-ZK9A type glass; as well as The three lenses of the fixed lens group include glasses of types H-ZFL7A, H-K9L and H-K9L listed in order from the lens closest to the object plane in the fixed lens group.

6. The zoom optical system according to any one of claims 1 to 3, wherein: The lenses of the focusing lens group are listed in order, starting from the lens farthest from the object plane in the focusing lens group, with radii of curvature being approximately as follows: The lenses of the zoom lens group are listed in order, starting from the lens farthest from the object plane in the zoom lens group, with radii of curvature approximately as follows: as well as The lenses of the fixed lens group are listed in order, starting from the lens farthest from the object plane in the fixed lens group, with radii of curvature approximately as follows: Wherein R1 is the radius of curvature of the imaging side surface of the lens, a positive value of R1 indicates a convex imaging side surface, and a negative value of R1 indicates a concave imaging side surface; R2 is the radius of curvature of the object side of the lens, a positive value of R2 indicates a concave object side surface, and a negative value of R2 indicates a convex object side surface; and all radii are expressed in millimeters.

7. An automatic lighting device, comprising: The zoom optical system according to any one of claims 1 to 6; as well as A controller is coupled to the focus lens group and the zoom lens group and is configured to independently move the focus lens group and the zoom lens group along an optical axis of the zoom optical system.

8. The automatic lighting device according to claim 7, wherein: The controller is electrically coupled to a first electromechanical mechanism and a second electromechanical mechanism, the first electromechanical mechanism is mechanically coupled to the focus lens group, and the second electromechanical mechanism is mechanically coupled to the zoom lens group; as well as The controller is configured to actuate one or both of the first electromechanical mechanism and the second electromechanical mechanism to move one of the focus lens group and the zoom lens group to a desired position relative to the object plane.

9. The automatic lighting device according to claim 8, wherein the controller is coupled to a data link and configured to move one of the focus lens group and the zoom lens group in response to a signal received via the data link.

10. The automatic lighting device according to claim 9, wherein the data link uses the DMX512 protocol.

11. An automatic lighting device according to claim 9, wherein the controller is configured to move the focusing lens group in response to a first control signal received on a first control channel of the data link, and to move the zoom lens group in response to a second control signal received on a second control channel of the data link.

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