CN112664909A

CN112664909A - Light spot adjusting assembly, light emitting device and operating lamp

Info

Publication number: CN112664909A
Application number: CN202011573608.5A
Authority: CN
Inventors: 王磊
Original assignee: Nanjing Mindray Bio Medical Electronics Co Ltd
Current assignee: Nanjing Mindray Bio Medical Electronics Co Ltd
Priority date: 2017-03-15
Filing date: 2017-03-15
Publication date: 2021-04-16
Anticipated expiration: 2037-03-15
Also published as: CN109073206A; EP3597993A1; WO2018165880A1; EP3597993A4; CN112664909B; ES2926223T3; CN109073206B; EP3597993B1

Abstract

The utility model provides a facula adjusting part comprises two-layer light-transmitting structure, the air gap has among the two-layer light-transmitting structure, the air gap among the facula adjusting part is passed through to the light that the light source sent, adjust two-layer light-transmitting structure's form, can change the shape of air gap, make the divergence angle increase when light transmits through the air gap, thereby change the deflection angle that the light beam arrived predetermined area, under the unchangeable condition of predetermined area height that the illuminator distance presents the facula, through the deflection angle that changes the light beam, thereby the size of the light beam spot that converges has been changed. The application also discloses a light-emitting device and an operating lamp simultaneously.

Description

Light spot adjusting assembly, light emitting device and operating lamp

The application is a divisional application, the application number of the original application is 201780024468.6, the application date is 3, 15 and 2017, and the invention name is 'a light-emitting device and an operating lamp'.

Technical Field

The invention relates to the field of illumination, in particular to a light spot adjusting assembly, a light-emitting device and an operating lamp using the light-emitting device.

Background

As a special lamp used in an operating room, an operating lamp needs to satisfy requirements in terms of brightness and achieve a shadowless effect. Therefore, the surgical lamp is generally larger in size, the size of the lamp head can reach 600 mm and 700mm, and a plurality of beams of light are converged into a desired light spot to illuminate the surgical field.

The common operating lamp generally adopts the technical scheme of starry sky, in the scheme, an LED light source is arranged in a reflecting shade or a lens to form an independent illuminating unit, a plurality of illuminating units are distributed in a lamp holder, the illuminating direction of the illuminating units points to an operating area, and finally, a surface light source with a certain direction and converging rays is formed to realize a shadowless effect. When the size of a light spot formed by the operating lamp in the operating area is adjusted in the scheme, a method of changing the irradiation angle of the illumination unit to change the light intensity distribution of the operating area is generally used, or a method of changing the light intensity distribution of the operating area by changing the relative intensity of light output by the illumination unit irradiated at different positions of the operating area.

Another variation of the gypsophila project is to distribute the lighting units composed of the LED light source and the lens around the lamp head, place a large reflector in the middle of the lamp head, the light emitted by the lighting units directly or indirectly irradiate the center of the lamp head and irradiate on the reflector, and the reflector reflects the light to the operation area. In the scheme, the method for changing the size of the light spot of the operation area uses two groups (or more groups) of lighting units, the positions and the irradiation angles of the groups of lighting units in the lamp holder are different, so that the directions of light rays reflected by the reflecting shade are different, different light intensity distributions are formed in the operation area, and the light intensity distributions in the operation area are changed by changing the relative intensities output by the two groups of lighting units.

The scheme needs a plurality of lighting units, on one hand, the weight, the material cost and the installation time of the lamp cap are increased due to the fact that the number of the lighting units is large, and on the other hand, the requirements on the positioning and installation structures of the lighting units are high due to the fact that the lighting angles of the lighting units are high.

Disclosure of Invention

The technical problem mainly solved by the invention is to provide a light spot adjusting scheme which is different from the prior art, and the light spots can be adjusted without adjusting the positions and the angles of a plurality of lighting units.

According to a first aspect, there is provided in an embodiment a spot adjustment assembly comprising:

the light emitting surface of the first cylindrical barrel is provided with a first concave-convex surface structure;

the light source comprises a second cylindrical tube, wherein the inner surface of the second light transmission structure is a light incident surface, the outer surface of the second light transmission structure is a light emergent surface, a second concave-convex surface structure is arranged on the light incident surface of the second cylindrical tube, the first cylindrical tube is nested inside the second cylindrical tube, so that the first concave-convex surface structure and the second concave-convex surface structure are oppositely arranged, an air gap is formed between the first concave-convex surface structure and the second concave-convex surface structure, the second cylindrical tube and the first cylindrical tube can move relatively to change the shape of the air gap, and therefore the size of a light spot converged in a predetermined area.

According to a second aspect, there is provided in an embodiment a light emitting apparatus comprising:

a light source for emitting light;

the reflector comprises a top end, a bottom end with an annular opening and a reflector extending from the top end to the bottom end, so that light projected to the inner side of the reflector is reflected and then converged into a light spot with a preset size in a preset area;

and the light spot adjusting assembly surrounds a light path between the light source and the reflecting cover and is used for adjusting light incident on the reflecting cover so as to change the size of the light spot converged in a preset area after the light is reflected by the reflecting cover.

In the above embodiment, facula adjusting part comprises inside and outside two-layer light-transmitting structure, the air gap has in the two-layer light-transmitting structure, the light that the light source sent passes through the air gap among the facula adjusting part, adjust the form of two-layer light-transmitting structure, can change the shape of air gap, make the divergence angle increase when light transmits through the air gap, radiate the reflector time more divergent, thereby change the deflection angle that the light beam reachd the predetermined area, under the unchangeable condition of predetermined area height at illuminator distance presentation facula, through the deflection angle that changes the light beam, thereby the size of the light beam spot that converges has been changed.

According to a third aspect, an embodiment may also provide a light emitting device, including:

a plurality of light sources for emitting light, at least one of the light sources including a first light source emitting light of a first color temperature and a second light source emitting light of a second color temperature;

the light deflection element is positioned between the light source and the reflector and is used for collecting forward light and lateral light emitted by the light source and adjusting the light propagation direction to enable the light emitted from the light deflection element to be projected to the inner side of the reflector;

the reflector comprises a top end, a bottom end with an annular opening and a reflector extending from the top end to the bottom end, so that light projected to the inner side of the reflector is reflected and then converged into a light spot with a preset size in a preset area.

In the embodiment, two monochromatic light sources with different color temperatures are combined together in a close range to form a point light source, and after the mixed light of the two color temperatures emitted by the point light source is reflected by the reflecting cover, light spots which are mixed more uniformly can be obtained.

According to a fourth aspect, an embodiment further provides an operating lamp, which comprises a lamp head, wherein the lamp head is made of the light-emitting device.

Drawings

FIG. 1 is a cross-sectional view of a surgical lamp in an axial direction;

FIGS. 2A-2H are schematic diagrams of various embodiments of a light source;

FIGS. 3A-3C are schematic diagrams of various embodiments of an optical deflection element;

FIG. 4 is a schematic view of a fold-line reflector according to an embodiment;

FIG. 5 is a schematic diagram of a reflector adopting the principle of total reflection in another embodiment;

FIG. 6 is a schematic diagram of adjusting the spot by changing the light source in one embodiment;

FIG. 7 is a schematic diagram of a light-emitting device in an embodiment for adjusting the light spot by the light spot adjusting assembly;

FIGS. 8A-8F are schematic diagrams of the spot adjustment process of the embodiment shown in FIG. 7;

FIG. 9 is a schematic view showing a structure of a light emitting device according to another embodiment in which a light spot is adjusted by a light spot adjusting unit;

FIG. 10 is a schematic view showing a structure of a light emitting device in still another embodiment in which a light spot is adjusted by a light spot adjusting member;

fig. 11 is a schematic structural diagram of a light-emitting device with an additional filter.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The light-emitting device disclosed in the embodiment of the invention does not adopt a starry sky scheme consisting of a plurality of small illumination units, but one or more light sources share one set of optical system, and the optical system collects light emitted by the light sources, and the light is converged into a desired light spot after being reflected. The following description will take the light-emitting device as an example of its application in a surgical lamp.

Referring to fig. 1, fig. 1 is a cross-sectional view of a surgical lamp along an axial direction, the surgical lamp includes a lamp head, the lamp head further includes a light emitting device 100, a lamp head rear cover 200 and a lamp head front cover 300, the light emitting device 100 is mounted on the lamp head rear cover 200, and the lamp head rear cover 200 and the lamp head front cover 300 enclose a receiving cavity and enclose the light emitting device 100 in the receiving cavity. The light emitting device 100 comprises a light source 1, a light deflecting element 2 and a reflector 3, the reflector 3 comprising a top end 301, a bottom end 302 and a reflector 303, the reflector gradually expanding from the top end to the bottom end, the bottom end having an annular opening, the top end also having a smaller annular opening, the annular opening may be in the shape of a circular ring or an elliptical or polygonal ring. In other embodiments, the tip may also take a closed form, such as being closed as a point or a platform. The reflector 3 is umbrella-shaped and fixed on the back cover of the lamp holder. The light source 1 is located in the top end region of the reflector, and the light emergent surface of the light source faces the bottom end of the reflector, the light source 1 is preferably installed on a circuit board (not shown in the figure), the circuit board is fixed on the lamp cap rear cover, which is equivalent to the position that the light source 1 is arranged close to the top of the center of the operating lamp, so that the heat generated by the light source can be rapidly conducted to the lamp cap rear cover through a large-area heat conduction path. The light deflecting element 2 is located between the light source 1 and the reflector 3, and the light deflecting element 2 is mounted on the back cover of the lamp cap or on the top of the reflector 3 or on the circuit board.

Each part of the light-emitting device and its light processing concept will be explained below.

In this embodiment, the light source 1 is a forward light source, and the forward light source is characterized in that light is emitted in a range of 0 to 180 degrees, so that the light emitted from the light source 1 includes forward light and side light. In other embodiments, the light source 1 may be a light source emitting light to the periphery. Herein, the angle between the light beam and the optical axis is defined as a divergence angle, and then the forward light refers to a light beam having a divergence angle of less than or equal to a certain value, and the side light refers to a light beam having a divergence angle of greater than or equal to a certain value and less than the maximum divergence, for example, for a light source emitting light in a range of 180 degrees, a light beam having a divergence angle of less than or equal to 40 degrees, 45 degrees or 50 degrees is referred to as a forward light, and a corresponding light beam having a divergence angle of greater than or equal to 40 degrees, 45 degrees or 50 degrees and less than 90 degrees is referred to as a side light. For light sources emitting in the 90 degree range, light beams having a divergence angle of 30 degrees or less or 35 degrees are referred to as forward light, and corresponding light beams having a divergence angle of more than 30 degrees or 35 degrees and less than 45 degrees are referred to as side light. It can be seen that, in any light source, the divergence angle of the side light is larger than that of the front light.

In this embodiment, the light source 1 may be a single light source or a combination of a plurality of light sources, the types of the light sources include but are not limited to LEDs, OLEDs, lasers, optical fibers, optical fiber bundles, phosphors, light pipes, etc., and the optical fibers, the optical fiber bundles, the light pipes, etc., may be collectively referred to as light guides herein, and are used to guide light emitted from a light source outside the lamp head to a light source position of the light emitting device, so as to be used as a light source in the light emitting device. When the light source 1 adopts a plurality of light source combinations, different types of light source combinations can be utilized to change parameters such as spatial distribution characteristics, spectral characteristics, intensity characteristics and the like of the whole light source so as to meet different clinical requirements. When a plurality of light sources are combined, the mixing degree of different light sources after being reflected can be changed by controlling the size of the light emitting area of the light sources and the parameters of the reflecting cover, so that uniform light mixing is realized. For example, as shown in fig. 2, in fig. 2A, one LED light source 101 is used as the light source 1; FIG. 2B is a diagram of a light source 1 composed of two light sources, i.e., a high color temperature LED102 and a low color temperature LED103, which can be used to adjust the relative brightness thereof to realize the color temperature adjustment function of the operating lamp; because two kinds of LEDs 102 and LEDs 103 with different color temperatures are combined in one light source 1, the distance between the LEDs 102 and the LEDs 103 is very close, compared with the reflecting cover 3 which is far larger than the light source 1 in size, the combined light source 1 can be regarded as a point light source, the light emitted by the combined light source is the mixed light of the two kinds of LEDs 102 and LEDs 103 with different color temperatures, and the mixed light is reflected by the reflecting cover 3 to obtain the light which is mixed more uniformly, so that when the brightness of one of the LEDs is adjusted, the color temperature of the light source can be changed, and the light spots obtained in a preset area are more uniform. In fig. 2C, an OLED surface light source 104 is used as the light source 1; in fig. 2D, an optical fiber or a fiber bundle or a light pipe 105 is used to introduce the light of a light source 106 outside the base of the surgical lamp to the light source position of the base of the surgical lamp to form a light source 1; the divergence angle of the light emitted by the optical fiber (bundle) is further expanded in fig. 2E using a lens 107 in conjunction with the optical fiber (bundle) 108 to form the light source 1; in fig. 2F, the light emitted from the head end of the optical fiber (bundle) further excites the phosphor 109 to form the light source 1, which can realize the conversion of light wavelength; in fig. 2G, different phosphors or combinations of optical fibers (bundles) of the light source are used to form the light source 1, for example, a high color temperature phosphor and a low color temperature phosphor are used to realize a color temperature adjustment function; fig. 2H is an example of a combination of different types of light sources.

For a light source with light distribution in the range of 0-180 degrees, how to collect and utilize light as much as possible is crucial, under the condition of no light deflection element 2, lateral light emitted by the light source 1 has a large divergence angle, so that a part, most or all of the lateral light can irradiate the inner side of the reflector, but forward light emitted by the light source 1 has a small divergence angle, the reflector is limited by the longitudinal dimension, the dimension of the reflector which can not be manufactured in the longitudinal direction is too large, so that the forward light cannot irradiate the inner side of the reflector, and the light emitted by the light source cannot be fully utilized. If the reflector is disposed on the optical path of the forward light to collect the forward light, the lateral light cannot be collected due to the design constraint of the surgical lamp on the reflector in space. For this reason, the embodiment of the present invention employs one light deflecting element 2 to collect light in the range of 0 ° to 180 ° (i.e., the range of a divergence angle of 0 ° or more and less than 90 °). The light deflection element 2 is located between the light source 1 and the reflector 3, specifically located on the light path of the forward light and the lateral light, and is used for collecting the forward light and the lateral light and adjusting the deflection direction of the forward light and the lateral light, so that the forward light and the lateral light emitted after adjustment can be projected to the inner side of the reflector. In a specific embodiment, the light deflecting element 2 may adjust the light propagation directions of the forward light and the side light by one or more of refraction, reflection, and total reflection, so that the forward light and the side light emitted from the light deflecting element both propagate in the direction of the reflector. In some embodiments, the light propagation directions of the forward light and the side light exiting from the light deflecting element are adjusted to be close to or uniform, as shown in fig. 3. To minimize the reflector thickness in the longitudinal direction, the lateral light can be deflected less and the forward light can be deflected more.

In order to make full use of the lateral light emitted by the light source, the light deflecting element 2 reflects and/or totally reflects the lateral light at most twice, i.e. the total number of times the light deflecting element 2 reflects and/or totally reflects the lateral light is at most twice. After the light is reflected, the energy of the light is lost, and multiple reflections cause cascade loss, so that the light energy cannot be effectively utilized. The reflection or total reflection of the light is limited by factors such as the manufacturing process and assembly of the optical element, the reflected or totally reflected light has a certain angle deviation from a theoretical reflection angle, the deviation of the reflection angle can influence the size or positioning of a light spot formed by convergence of the reflection cover, and the deviation of the reflection angle can be further amplified by multiple reflection or total reflection. In view of the above, the light deflecting element 2 of the present embodiment reflects lateral light twice and/or totally at most.

To improve the rational utilization of the forward light, the total number of reflections and/or total reflections of the forward light may also be set to at most two times for the reasons described above.

The specific structure of the light deflecting element 2 is illustrated in fig. 3A-3C, and these exemplary light deflecting elements 2 may be symmetrical about their central axes, with the light source 1 emitting light over 180 °, 90 ° being shown as the optical axis (i.e., the center), and 0 ° and 180 ° being the edges.

In the embodiment shown in fig. 3A, the light deflecting element 2 collects side light near the edges by refraction (e.g. light with a divergence angle between 60 and 90 degrees, 60 ° < divergence angle <90 °), and front light near the center by total reflection (e.g. light with a divergence angle between 0 and 60 degrees, 0 ° < divergence angle ≦ 60 °). The light deflecting element 2 includes a refraction portion 201 and a total reflection portion 202, the refraction portion 201 and the total reflection portion 202 are transparent media, the refraction portion 201 is disposed on a light path of the side light to collect the side light, and the total reflection portion 202 is disposed on a light path of the forward light to collect the forward light. Fig. 3A is a cross-sectional view of the optical deflection element 2 along the central axis, and the entity of the optical deflection element 2 is rotated around the central axis by the graph shown in fig. 3A. Refraction portion 201 is the bowl form, and the bowl mouth is fixed at the lamp holder rear portion up, and refraction portion 201 includes surface 2011 and internal surface 2012, and synthetic square groove is enclosed to internal surface 2012, and the opening forms the bowl mouth above, and light source 1 sets up in the bowl mouth region of refraction portion 201. The side light emitted from the light source 1 is incident on the inner surface 2012, and is refracted and emitted from the outer surface 2011. The outer surface 2011 is convex, and for convenience of description, the convex is referred to as a first convex. The curvature of the first convex surface 2011 varies with the divergence angle of the lateral light, so that the light propagation directions are close to or uniform after the lateral light is refracted by the first convex surface. The total reflection part 202 is located below the refraction part 201, specifically, on the optical path of the forward light. The total reflection part 202 includes a light incident surface 2021, a total reflection surface 2022, and a light exit surface 2023, the light incident surface 2021 and the light exit surface 2023 may be flat surfaces, and the total reflection surface 2022 is a convex surface, which is referred to herein as a second convex surface, and the second convex surface extends obliquely downward from the central axis. The forward light emitted by the light source 1 is incident from the incident surface 2021 and then irradiates on the second convex surface 2022, the curvature of the second convex surface 2022 changes with the divergence angle of the forward light, so that the incident angle of the forward light on the inner side surface of the second convex surface is greater than or equal to the critical angle, therefore, the forward light is totally reflected on the second convex surface 2022, the propagation direction of the forward light after being reflected by the second convex surface is close to or consistent with each other, and the totally reflected forward light is emitted from the light emitting surface 2023. In the embodiment shown in fig. 3A, after the side light and the forward light pass through the light deflecting element 2, the propagation directions of the respective light rays are substantially parallel and irradiate the reflector 3 in the horizontal direction.

In a preferred embodiment, the refractive portion 201 and the total reflection portion 202 of the optical deflection element 2 may be integrated together and integrally molded by a mold at the time of manufacturing.

In the embodiment shown in fig. 3B, the light deflecting element 2 collects light rays at all angles by two total reflections. The light deflection element is a transparent medium and comprises a third convex surface 203, a fourth convex surface 204 and a light emitting surface 205, the third convex surface 203 and the fourth convex surface 204 are opposite, the third convex surface 203 extends obliquely downward from a plane where a light source is located and is located on a light path of lateral light for collecting the lateral light, and the curvature of the third convex surface 203 is changed along with the incident angle of the lateral light, so that the lateral light is totally reflected on the inner side surface of the third convex surface 203 and is reflected to the inner side of the fourth convex surface 204. The fourth convex surface 204 is extended from the central axis to the oblique lower side, is located on the light path of the forward light, and is used for collecting the total reflection light of the forward light and the lateral light, and the curvature of the fourth convex surface changes along with the incident angle of the total reflection light of the forward light and the lateral light, so that the incident angle of the total reflection light of the forward light and the lateral light on the inner side surface of the fourth convex surface is greater than or equal to the critical angle, and the propagation directions of the total reflection light of the forward light and the lateral light are close to or consistent after the total reflection light of the. Fig. 3B shows a cross-sectional view of the light deflecting element 2 along the central axis, the light exit surface 205 is a plane connecting the edges of the third convex surface 203 and the fourth convex surface 204, and the entity of the light deflecting element 2 is formed by rotating the figure shown in fig. 3B around the central axis. In the embodiment shown in fig. 3B, after the side light and the forward light pass through the light deflecting element 2, the propagation directions of the respective light rays are substantially parallel and irradiate the reflector 3 in the horizontal direction.

In the embodiment shown in fig. 3C, the light deflecting element 2 collects the edge light by refraction of a single element and collects the light near the center by reflection of another element. The deflecting element 2 comprises a refractive portion 206 and a reflective portion 207. The refractive part 206 is a transparent medium, the refractive part 206 is disposed on the optical path of the side light for collecting the side light, and the refractive part 206 is composed of a light incident surface 2061, a fifth convex surface 2062 as a light exit surface, and a top surface 2063. The top surface 2063 is fixed to the rear of the lamp cap, the light incident surface 2061 may be made flat and located at the side of the refraction portion 206, and the curvature of the fifth convex surface 2062 varies with the divergence angle of the lateral light, so that the light traveling directions are close to or uniform after the lateral light is refracted by the fifth convex surface. The reflecting portion 207 is a concave mirror located below the refracting portion 206, and the concave mirror extends obliquely downward from the central axis and is symmetrical with respect to the central axis. Fig. 3C is a cross-sectional view of the optical deflection element 2 along the central axis, and the entity of the optical deflection element 2 is rotated around the central axis by the graph shown in fig. 3C. In the embodiment shown in fig. 3C, after the side light and the forward light pass through the light deflecting element 2, the propagation directions of the respective light rays are substantially parallel and irradiate the reflector 3 in the horizontal direction. In actual manufacturing, the refraction portion 206 and the reflection portion 207 can be separate components, the refraction portion 206 is fixed at the rear of the lamp head, the reflection portion 207 can be fixed on a support frame, and the support frame is fixed inside the lamp head.

Fig. 3A to 3C described above are only exemplary embodiments of the optical deflection element 2. Other shapes of the optical deflection element 2 may be designed to adjust the light propagation directions of the lateral light and the forward light based on the transmission (particularly, refraction), reflection, or total reflection processing manner of the optical deflection element 2 for the lateral light and the forward light.

In one embodiment, an optical element may be added to the light deflecting element 2 of fig. 3A, and the optical element is located on the optical path from the light deflecting element 2 to the reflector. The optical element is used to further shape the lateral light and the forward light adjusted by the light deflecting element 2, for example, to further refract them so that the light propagation directions of the lateral light and the forward light are close to or coincident with each other.

In one embodiment, the light deflecting element 2 includes a refractive portion made of a transparent material and including a first curved surface on an optical path of the side light, a curvature of the first curved surface varying with a divergence angle of the side light. The first curved surface refracts the side light projected thereon, and the refracted side light is emitted from the light deflection element to a reflector of the reflector.

In one embodiment, the light deflecting element 2 includes a first non-transmissive portion, which means that incident light is not transmitted therethrough but is not limited to being transparent itself. For example, the first non-transmissive portion may be a total reflection portion made of a transparent material, or a non-transparent reflective portion coated with a reflective coating. The first non-transmissive portion includes a second curved surface on an optical path of the side light, and a curvature of the second curved surface varies with an incident angle of the side light. When the first non-transmission part is a total reflection part, the second curved surface totally reflects the side light projected thereon, and the totally reflected side light is emitted from the light deflection element to a reflector of the reflector. When the first non-transmission part is the reflection part, the second curved surface reflects the side light projected thereon, and the reflected side light is emitted from the light deflection element to the reflector of the reflector.

In one embodiment, the light deflecting element 2 may further include a second non-transmissive portion, which may be a total reflective portion made of a transparent material or a non-transparent reflective portion coated with a reflective coating, similar to the first non-transmissive portion. The second non-transmissive portion includes a third curved surface on an optical path of the side light, and a curvature of the third curved surface varies with an incident angle of the side light. When the second non-transmission part is a total reflection part, the third curved surface totally reflects the side light projected thereon, the totally reflected side light is projected on the first non-transmission part, and the totally reflected light of the side light is totally reflected for the second time by the first non-transmission part; in this case, the side light after the second total reflection is projected onto the reflector. When the second non-transmission part is a reflection part, the third curved surface reflects the side light projected thereon, the reflected side light is projected on the first non-transmission part, and the reflected light of the side light is reflected for the second time by the first non-transmission part; in this case, the side light after the secondary reflection is projected onto the reflector.

In the above-described embodiment, the light deflecting element 2 can adjust the light propagation direction of the side light to project on the reflector after refracting, reflecting and/or totally reflecting the side light, and for example, the light propagation direction of the side light can be adjusted to different positions to project approximately parallel on the reflector for a light source disposed on the optical axis. In the above embodiments, the first curved surface may be, for example, the first convex surface or the fourth convex surface in fig. 3A to 3C, the second curved surface may be, for example, the third convex surface of the total reflection type, the fourth convex surface of the total reflection type or the concave mirror of the reflection type in fig. 3A to 3C, and the third curved surface may be, for example, the second convex surface of the total reflection type or the compound curved surface in fig. 3A to 3C; or the first curved surface, the second curved surface and the third curved surface can be concave-convex matched composite curved surfaces.

In one embodiment, as shown in fig. 1, the reflector 3 may be formed by a reflector using a reflection principle, and light irradiated on the reflector is reflected, superposed, and then converged to the operation region 5. In order to reduce the height of the reflecting shade and make the lamp holder of the operating lamp look lighter, thinner and more beautiful, the cross section of the reflecting shade can adopt a similar broken line form. Referring to fig. 1, the cross section of the reflector along the central axis is a fold line. As shown in fig. 4, each bend in the reflector forms an annular reflective band 304 having a radius that increases stepwise in a direction from the top end to the bottom end.

The reflection band may be formed by enclosing a plurality of planes, which are referred to as reflection band flaking herein, the planes may be trapezoidal planes, triangular planes, etc., as shown in fig. 4, the trapezoidal planes 305 are connected end to form an annular reflection band, and this structure makes the section of the reflection band along the radial direction be polygonal.

In another embodiment, as shown in fig. 5, the reflector can also be constituted by a totally reflecting transparent element 6 using the principle of total reflection. The light rays are transmitted into the interior of the surgical operation area 5 through the first surface, when reaching the reflecting surface, the light rays are transmitted and totally reflected if the incident angle of the light rays is larger than the total reflection angle, and the reflected light rays are refracted through the lower surface, emitted and superposed and converged in the surgical operation area 5. The cross-section of the transparent element 6 in fig. 5 can also take a form similar to the broken lines in the figure in order to reduce weight and height.

Generally, the production process of the reflector determines that the reflecting surface of the reflector is easily influenced by factors such as environment, wiping and the like; therefore, the operating lamp using the reflecting shade also comprises a lamp holder rear shade, a light-transmitting lamp holder front shade and other elements on the lamp holder, and the reflecting shade is protected between the lamp holder rear shade and the light-transmitting lamp holder front shade. The transparent element in the total reflection scheme is generally processed by adopting an injection molding or die pressing process without a reflective film layer, and the surface of the transparent element has good weather resistance and wiping resistance, so that the transparent element can be directly presented to a user without being protected by a lamp cap rear cover and/or a lamp cap front cover. Therefore, the total reflection scheme can reduce the components of the operating lamp, and the operating lamp is more beautiful, and has more design feeling and high-grade feeling.

When the light emitting device works, light 4 emitted by the light source 1 is collected through the light deflection element 2, the light emitting direction is deflected by utilizing the transmission, or reflection or total reflection action, and the light is deflected by a large angle and then emitted to the periphery of the lamp holder in the direction close to the horizontal direction. The light rays emitted to the periphery are collected by the reflector 3 and reflected to the operation area 5, and the reflected light rays 4 are mutually superposed in the operation area 5 to finally form the operation lamp with a certain lamp holder area and good shadowless effect.

The embodiment can effectively utilize light rays of various angles emitted by the light source through the matching of the light deflection element and the reflecting cover, and can change the size of a formed light spot by changing the distance from the operating lamp to an operating area when the operating lamp is installed.

Because the geometric dimension of the reflector in the scheme is far larger than that of the combined light source, for example, when the operating lamp only uses one large reflector, the diameter of the circular large reflector is generally 400mm-750mm, and the dimensions of the LED light source, the optical fiber bundle and the like are generally 0.01mm-20mm, the combined light source can be regarded as an approximate small light source relative to the reflector, and the sub-light sources of the small light source form a plurality of superposed diffuse spots in the operating area after being reflected by the reflector, so the large reflector in the scheme is very favorable for uniformly mixing light of the combined light source. And, through further flaking to the reflector, the homogeneity of mixing light can further be strengthened, makes the light that all different grade type light sources launched after reflection, mixture and the stack of reflector, can both shine the operation region uniformly, can avoid like this or reduce the inhomogeneity of spectrum space distribution in the operation region facula.

Meanwhile, when a plurality of light sources are arranged, because the light rays of different light sources are mixed at the reflecting shade inside the lamp head and then reflected to the operation area, the light rays are emitted out through one lighting unit, and therefore when objects such as the head, arms, hands and the like of a doctor are shielded between the lamp head and the operation area, obvious color stripes cannot appear in the operation area.

In general, the distance from the operating lamp to the operating area is kept constant after being adjusted according to the height of a doctor in the operating process, but in the using process of the operating lamp, different operating processes and types and operating fields may require different requirements, and at the moment, the size of a light spot of the operating lamp needs to be adjusted. In the case of multiple light sources, the spot size can be varied by adjusting the illumination of different light sources.

As shown in figure 1, the light source 1 is located at the center of the operating lamp, i.e. the optical axis of the light source 1 coincides with the central axis of the operating lamp, and after the light 4 is collected, deflected and reflected by the reflector through the light deflection element 2, the converged light spot is located on the central axis of the operating lamp. In this embodiment, a multi-light source scheme is adopted, and a plurality of light sources may be arranged in a square array or in a plurality of concentric circles. When the size of the light spot needs to be changed, a peripheral light source of the central light source or a combined light source of the central light source and the peripheral light source can be adopted. When the peripheral light source or the combined light source works, the light is collected by the reflecting shade and reflected to the operation area. Because the optical axis of the light source deviates from the central axis, the light rays cannot be completely converged by the reflecting shade, and therefore, a large light spot is formed in the operation area. As shown in fig. 6, the light emitted by the off-center peripheral light source 7 is deflected by the light deflecting element 2 to generate light rays in different directions, which are no longer horizontal relative to the light rays of fig. 1 and have a larger off-angle, and these light rays are reflected by the reflector 3 to generate divergent light rays 8 having different irradiation directions and positions, and finally form a larger-area illumination spot in the operation area 5, which is off the optical axis of the light source. Therefore, by adopting the operating lamp provided by the embodiment of the invention, if the size of the illumination light spot of the operation area needs to be adjusted to adapt to operations with different incision sizes, the operation can be realized by adjusting the light-emitting area of the light source combination; when a small light spot is needed, only a light source close to the center is used for emitting light; when a large spot is desired, the intensity away from the central light source can be increased. By the method, the size of the light spot can be adjusted quickly and quietly, and the clinical experience of a user is facilitated.

The spot size may be adjusted by means of a spot adjustment assembly, an example of which is shown in fig. 7-9. As shown in fig. 7, the light spot adjusting assembly includes a first cylindrical barrel 9 and a second cylindrical barrel 10, the cylindrical barrels may be cylindrical barrels or prismatic barrels, the first cylindrical barrel 9 is nested inside the second cylindrical barrel 10, the first cylindrical barrel 9 and the second cylindrical barrel 10 surround the light deflecting element 2 and are disposed on the light path from the light deflecting element 2 to the reflector 3, a space is provided between the first cylindrical barrel 9 and the second cylindrical barrel 10 to form an air gap, when the form of at least one of the first cylindrical barrel and the second cylindrical barrel is changed, the shape of the air gap is changed, and the light spot size is adjusted by changing the shape of the air gap. The first and second cylindrical barrels referred to herein have a form including a shape and a state including a positional change. The form change of the first cylindrical barrel and the second cylindrical barrel can be adjusted by an adjusting device, which is explained in detail below; the form change of the first cylindrical barrel and the second cylindrical barrel can also be realized through the structure or material characteristics of the first cylindrical barrel and the second cylindrical barrel. For example, the outer surface of the first cylindrical barrel and the inner surface of the second cylindrical barrel may be deformed by an inward and/or outward bulge to change the shape of the air gap between the first cylindrical barrel and the second cylindrical barrel.

Referring to fig. 8A, the outer surface of the first cylindrical barrel 9 has a first concave-convex structure 9a, the inner surface of the second cylindrical barrel 10 has a second concave-convex structure 10a, and the first concave-convex structure and the second concave-convex structure may be directly formed on the outer surface of the first cylindrical barrel and the inner surface of the second cylindrical barrel, respectively, or a layer of concave-convex structure may be attached to the outer surface of the first cylindrical barrel and the inner surface of the second cylindrical barrel. An air gap 12 is provided between the first and second relief structures, and the first and second

cylindrical barrels

9, 10 are relatively movable to change the shape of the air gap 12 by movement.

In this embodiment, the first concave-convex structure 9a is a first wavy structure, and the second concave-convex structure 10a is a second wavy structure, in other embodiments, the first concave-convex structure and the second concave-convex structure may also be concave point structures or convex point structures, and may also be groove structures or convex ridge structures. The first wavy surface structure and the second wavy surface structure fluctuate along the circumferential direction, and the first cylindrical barrel and the second cylindrical barrel can be controlled to move relatively along the circumferential direction by the adjusting device, so that the shape of the air gap 12 is changed, and the adjusting principle is as follows:

the light source is placed in the center, and a certain interval air gap is formed between the two cylindrical waves, and the shapes of the two cylindrical waves are similar. As shown in fig. 8A, which is a horizontal cross-sectional view of the relative positions of the two cylinders in the small spot state, the peak point of the first cylindrical cylinder 9 corresponds to the valley point of the outer second cylindrical cylinder 10, and an approximately parallel air gap 12 is formed between the first cylindrical cylinder 9 and the second cylindrical cylinder 10, as shown in fig. 8D. Fig. 8D shows the direction of light rays in the horizontal section of the small light spot, the light rays pass through the parallel air gap 12, and the included angle 13 between the two boundaries of the air gap 12 is zero, which is equivalent to the light rays passing through a piece of flat glass, so that the emergent direction of the light rays 14 after passing through the two cylinders is not changed, deviates from a small displacement but is parallel to the incident direction; so that the light rays substantially retain their original state after passing through the cylinder. After rotating first cylindrical tube 9, the peak of first cylindrical tube 9 and the valley point of outer lane second cylindrical tube 10 stagger certain distance, as shown in fig. 8B, form the unequal wedge air gap 12 of size between first cylindrical tube 9 and the second cylindrical tube 10, as shown in fig. 8E, the contained angle on two borders of air gap 12 is nonzero, be equivalent to air gap 12 gradual change for the convex lens of air, the refracting index of cylinder material is higher than the refracting index of air, then the convex lens of air has the effect of dispersing, so light outwards diverges behind wedge air gap 12, make facula size grow. When the first cylindrical barrel is rotated by a small angle, the wedge angle 15 of a part of the air gap is small when the light passes through the gap 12, and the light 16 is deflected by a small angle through the wedge angle; the wedge angle 17 with one air gap is larger, through which the light ray 18 is deflected by a larger angle; therefore, after the light rays pass through the first cylindrical tube and the second cylindrical tube, the deflection of some light rays is smaller, the deflection of some light rays is larger, some light rays are closer to the central axis and some light rays are farther away after being reflected by the reflecting cover, and finally the light rays are superposed and combined together to form an optical field with certain light intensity distribution; when the light rays deviated from the near position are much, the light intensity is more concentrated on the optical axis, and a user can observe and feel a small light spot; when the light is far away, the light intensity increases all around, and the user can observe and feel a larger light spot. Therefore, the light spot gradually becomes smaller and larger along with the rotation of the first cylindrical barrel. Continuing to rotate the first cylindrical tube 9, the peak point of the first cylindrical tube 9 corresponds to the peak point of the second cylindrical tube 10 on the outer ring, the valley point of the first cylindrical tube 9 corresponds to the valley point of the second cylindrical tube, fig. 8C is a horizontal cross-sectional view of the relative positions of the two cylindrical tubes in the maximum light spot state, and a completely wedge-shaped air gap 12 is formed between the first cylindrical tube 9 and the second cylindrical tube 10. Fig. 8F shows the direction of the maximum spot of light, which passes through the wedge-shaped air gaps 12, all of which have the maximum wedge angle 19, and the light deflection angle 20 is the maximum deflection angle, so that a maximum spot of light is formed after reflection by the reflector.

Therefore, when the air gap is in a parallel state, the light rays pass through the two cylinders to the reflecting cover without changing the angle, and form small light spots in the operation area after being reflected by the reflecting cover. When the light spot needs to be enlarged, one of the cylinders is rotated to change the shape of the air gap to form wedge-shaped air, so that light rays are deflected left and right when passing through the two cylinders, and after being reflected by the reflecting cover, the divergence angle of the light rays is further enlarged, and the large light spot is formed in an operation area.

In another embodiment, as shown in fig. 9, the first wavy surface structure and the second wavy surface structure undulate in the axial direction, and the first cylindrical barrel 21 and the second cylindrical barrel 22 are relatively movable in the axial direction. When the first cylindrical barrel 21 and the second cylindrical barrel 22 relatively move along the axial direction, the corresponding positions of the peak point and the valley point of the first wavy surface structure and the second wavy surface structure are changed, so that the wedge angle of the air gap is changed, and the size of the light spot can be changed in the same way.

Fig. 10 discloses another scheme of the light spot adjusting assembly, as shown in fig. 10, the light spot adjusting assembly includes a first light-transmitting plate 24 and a second light-transmitting plate 25, the first light-transmitting plate 24 and the second light-transmitting plate 25 are oppositely disposed, for example, the first light-transmitting plate 24 and the second light-transmitting plate 25 are disposed in parallel, the first light-transmitting plate 24 and the second light-transmitting plate 25 are located on a light path of light reflected by the light-reflecting cover, the first light-transmitting plate 24 and the second light-transmitting plate 25 can move relatively, the surface of the first light-transmitting plate 24 facing the second light-transmitting plate has a third concave-convex structure, the surface of the second light-transmitting plate facing the first light-transmitting plate has a fourth concave-convex structure, and an air gap 26 is provided between the third concave-convex. Based on the same principle as in the embodiment, the shape of the air gap 26 can be changed when the relative positions of the first and second

transparent plates

24, 25 are adjusted by the adjusting means, and based on the same principle as in the embodiment, the spot size can be changed.

As shown in fig. 11, in the above embodiment, a filter 23 may be added between the light source 1 and the light deflecting element 2 to filter or reduce unwanted wavelength energy and modulate the light source spectrum. For example, an infrared cut-off filter is added, near infrared light is reduced, and the luminescence performance of the lamp light of the operating lamp is improved; for another example, an optical filter for modulating a visible light waveband is added, and the color temperature or the color rendering index of a light source is improved; for another example, a blue light partial cut-off filter is added, so that the blue light characteristic of the white light LED light source is improved, the blue light hazard of the operating lamp is reduced, and the like. The solution can also be used for directly plating an optical film on the surface of the light deflection element to filter or reduce unwanted wavelength energy.

In some embodiments, the lamp head of the operating lamp comprises a plurality of light emitting modules, each light emitting module comprises one of the light emitting devices, and the plurality of light emitting modules can be independently installed or integrally installed and are inclined at a predetermined angle, so that the light emitting devices are inclined at a predetermined angle and the central axes of the light emitting devices intersect at a point. In this case, light emitted from the plurality of light sources is reflected by the respective reflectors, and the light can be converged into one spot.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. Variations of the above-described embodiments may be made by those skilled in the art, consistent with the principles of the invention.

Claims

1. A spot adjustment assembly, comprising:

2. The spot adjustment assembly of claim 1, wherein the first concave-convex structure and the second concave-convex structure are wavy structures, and the directions of the wavy surfaces of the first concave-convex structure and the second concave-convex structure are consistent.

3. The spot adjustment assembly according to claim 2, wherein the wavy surface of the first concave-convex structure and the wavy surface of the second concave-convex structure respectively fluctuate along the circumferential direction of the first cylindrical barrel nested in the second cylindrical barrel, and the first cylindrical barrel and the second cylindrical barrel can rotate relatively along the circumferential direction; or the wave surfaces of the first concave-convex surface structure and the second concave-convex surface structure respectively fluctuate along the axial direction of the first cylindrical barrel nested in the second cylindrical barrel, and the first cylindrical barrel and the second cylindrical barrel can relatively move along the axial direction.

4. A light-emitting device, comprising:

a light source for emitting light;

5. The illumination apparatus of claim 4, wherein the spot adjustment assembly comprises:

6. The light-emitting device according to claim 5, wherein the first concave-convex structure and the second concave-convex structure are wavy structures, and directions of extension of wavy surfaces of the first concave-convex structure and the second concave-convex structure are the same.

7. The illumination device according to claim 6, wherein the wavy surface of the first concave-convex structure and the wavy surface of the second concave-convex structure respectively fluctuate along the circumferential direction of the first cylindrical tube nested in the second cylindrical tube, the first cylindrical tube and the second cylindrical tube are relatively rotatable along the circumferential direction, or the wavy surface of the first concave-convex structure and the wavy surface of the second concave-convex structure respectively fluctuate along the axial direction of the first cylindrical tube nested in the second cylindrical tube, and the first cylindrical tube and the second cylindrical tube are relatively movable along the axial direction.

8. The light-emitting apparatus according to claim 7, further comprising a light deflecting element disposed between the light source and the reflector for collecting forward light and side light emitted from the light source and adjusting a light traveling direction so that light emitted from the light deflecting element is projected to an inside of a reflector of the reflector; the light spot adjusting assembly surrounds the light path between the light deflecting element and the reflecting shade.

9. The lighting apparatus according to claim 6, wherein the light source is plural, and the at least one light source includes a first light source emitting light of a first color temperature and a second light source emitting light of a second color temperature.

10. A light-emitting device, comprising:

11. The light emitting device of claim 10, wherein the reflector has a base diameter greater than a tip diameter, and wherein the reflector expands gradually from the tip to the base.

12. The lighting apparatus of claim 10, wherein the color temperature of the light source is adjusted by adjusting the relative brightness of the first light source and the second light source.

13. An operating lamp comprising a lamp base, characterized in that the lamp base comprises a light emitting arrangement according to any one of claims 4 to 12.