Light source device and illumination device

Abstract

A light source device (10) and an illumination device (1). The light source device (10) comprises: a light-emitting assembly (11), a collimating lens group (12) and a light quantity detection assembly (13). The collimating lens group (12) is arranged on a light-emitting side of the light-emitting assembly (11) and is configured to collimate light emitted by the light-emitting assembly (11). The collimating lens group (12) comprises a light-entering lens (121) arranged adjacent to the light-emitting assembly (11) and a light-exiting lens (122) arranged away from the light-emitting assembly (11). The light quantity detection assembly (13) comprises a photoelectric sensor (131) arranged offset from the optical axis of the collimating lens group (12), the photoelectric sensor (131) being located between a light-entering surface (1210) of the light-entering lens (121) and a light-exiting surface (1220) of the light-exiting lens (122).

Description

Light source device and illumination device

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application with the application number 202410867294.1, the title of which is "Light source device, illumination device and endoscope", filed on June 28, 2024, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of light intensity detection, in particular to a light source device and an illumination device. BACKGROUND

[0004] Unlike the related cold light source which uses a xenon lamp as a light emitting device, the current medical cold light source mainly uses an LED (English: Light-Emitting Diode; Chinese: Light-Emitting Diode) as a light emitting device, and uses multiple color LEDs to mix light to obtain white light or special spectrum (such as NBI narrow band imaging) to provide sufficient illumination for the endoscope. However, whether using a xenon lamp or using an LED as a medical cold light source, the luminous flux of the medical cold light source will gradually decrease with the increase of the use time; although the service life of the xenon lamp is about several hundred hours, the service life of the LED is longer and can reach tens of thousands of hours, but affected by factors such as heat dissipation, temperature drift or light decay may also occur, which requires real-time monitoring of the light intensity of the light source to ensure the stability of the light output during long-term use.

[0005] The related light quantity detection scheme usually arranges a photoelectric sensor between the LED and the collimator group or at the color combining device after the collimator group to convert the light on the photosensitive surface of the sensor into high and low level outputs to realize factual detection of the light quantity. However, the photoelectric sensor in this light quantity detection scheme is easy to receive light emitted by multiple LEDs at the same time, causing deviation in the sensor detection result. In order to solve this problem, the related light quantity detection scheme has to additionally increase a light isolation structure to install the photoelectric sensor for light isolation, but this will lead to complex overall structure, increase assembly difficulty, and greatly increase cost. SUMMARY

[0006] According to various embodiments of the present application, a light source device and an illumination device are provided.

[0007] The present application provides a light source device, comprising:

[0008] a light emitting assembly;

[0009] A collimating mirror set arranged on a light emitting side of the light emitting assembly and configured to collimate light rays emitted via the light emitting assembly, the collimating mirror set comprising an entrance lens arranged adjacent to the light emitting assembly and an exit lens arranged away from the light emitting assembly; and

[0010] A light quantity detection assembly comprising a photosensor arranged away from an optical axis of the collimating mirror set, the photosensor being located between an entrance surface of the entrance lens and an exit surface of the exit lens and configured to receive stray light formed via the collimating mirror set for light quantity detection.

[0011] In an embodiment of the present application, the collimating mirror set further comprises a lens barrel, the entrance lens and the exit lens being coaxially assembled within the lens barrel to form an enclosed space between an exit surface of the entrance lens and an entrance surface of the exit lens; a detection window is formed on a peripheral sidewall of the lens barrel, the detection window being located between the exit surface of the entrance lens and the entrance surface of the exit lens; the photosensor is arranged at a position corresponding to the detection window away from the optical axis of the collimating mirror set.

[0012] In an embodiment of the present application, the entrance lens and the exit lens are arranged apart to form an on-axis gap between an exit surface of the entrance lens and an entrance surface of the exit lens; the detection window is located at a center of the on-axis gap deviated to a side of the exit lens.

[0013] In an embodiment of the present application, the entrance surface of the exit lens is a convex surface.

[0014] In an embodiment of the present application, the convex surface is a spherical surface, a quadratic surface or a high-order even non-spherical surface.

[0015] In an embodiment of the present application, a radial projection of the detection window at least partially falls on the entrance surface of the exit lens.

[0016] In an embodiment of the present application, a radial projection of the detection window entirely falls on the entrance surface of the exit lens.

[0017] In an embodiment of the present application, the detection window is a through hole formed on an upper sidewall of the lens barrel.

[0018] In an embodiment of the present application, the through hole is a circular hole.

[0019] In an embodiment of the present application, the collimating mirror set further comprises a lens barrel with a detection window formed on a peripheral sidewall thereof; the light quantity detection assembly further comprises a light passing member connected to the lens barrel and having a light passing hole formed thereon, the light passing hole being in communication with the detection window to form a light passing channel corresponding to a light receiving surface of the photosensor and having a length greater than a diameter.

[0020] In an embodiment of the present application, the length of the light passage channel is between 15 mm and 20 mm.

[0021] In an embodiment of the present application, the light passage member and / or the lens barrel has an extinction surface.

[0022] In an embodiment of the present application, the detection window is a through hole penetrating the peripheral wall of the lens barrel; the center line of the light passage hole is perpendicular to the optical axis of the collimator lens group.

[0023] In an embodiment of the present application, the light passage hole extends obliquely relative to the optical axis of the collimator lens group.

[0024] In an embodiment of the present application, the light passage hole extends from the detection window towards the direction away from the incident surface of the light exit lens.

[0025] In an embodiment of the present application, the light quantity detection assembly further comprises a light filter located on the light receiving side of the photosensor.

[0026] In an embodiment of the present application, the light quantity detection assembly further comprises a light homogenizer and a light stop, wherein the light homogenizer is located in the light path between the light filter and the photosensor, and the light stop is located in the light path between the light homogenizer and the photosensor.

[0027] In an embodiment of the present application, the collimator lens group further comprises a lens barrel with a detection window in the peripheral wall; the detection window is a stepped hole penetrating the peripheral wall of the lens barrel, and the light filter, the light homogenizer and the light stop are stacked in the stepped hole.

[0028] In an embodiment of the present application, the light passage member abuts against the light stop.

[0029] In an embodiment of the present application, the collimator lens group further comprises a lens barrel with a detection window and a spacer arranged in the lens barrel; the light entrance lens and the light exit lens are coaxially assembled in the lens barrel, the spacer abuts between the exit surface of the light entrance lens and the incident surface of the light exit lens, and the inner diameter of the spacer gradually increases from the exit surface of the light entrance lens to the incident surface of the light exit lens.

[0030] In an embodiment of the present application, the collimator lens group further comprises a lens barrel with a detection window; the detection window is a mounting groove recessed from the inner peripheral wall of the lens barrel, and the photosensor is fixed in the mounting groove.

[0031] In an embodiment of the present application, the lens barrel is a split lens barrel formed by mutually fastening an upper barrel body and a lower barrel body.

[0032] In an embodiment of the present application, the light quantity detection assembly further comprises a detection circuit board electrically attached to the photosensor; the upper cylindrical body has an upper clamping slot with an opening downward, and the lower cylindrical body has a lower clamping slot with an opening upward, so that when the upper cylindrical body is fastened to the lower cylindrical body, the upper clamping slot and the lower clamping slot are aligned to form the mounting slot for clamping the detection circuit board.

[0033] In an embodiment of the present application, the collimating lens group further comprises a lens barrel with a detection window; the detection window is a through hole radially penetrating the peripheral wall of the lens barrel, and the light receiving surface of the photosensor is arranged correspondingly to the through hole for receiving stray light propagating into the through hole.

[0034] In an embodiment of the present application, the through hole extends parallel to or obliquely relative to the central normal line of the light receiving surface of the photosensor.

[0035] In an embodiment of the present application, the light quantity detection assembly further comprises a detection circuit board electrically attached to the photosensor; the detection circuit board is fixed to the outside of the lens barrel, and the photosensor is located in the through hole.

[0036] In an embodiment of the present application, the collimating lens group further comprises a lens barrel with a detection window; the detection window is a notch axially penetrating the peripheral wall of the lens barrel; the light quantity detection assembly further comprises a detection circuit board electrically attached to the photosensor, and the detection circuit board is fixed to the lens barrel to block the notch.

[0037] In an embodiment of the present application, the light quantity detection assembly further comprises an attenuation sheet arranged on the light receiving side of the photosensor.

[0038] In an embodiment of the present application, the distance between the photosensor and the optical axis of the collimating lens group is greater than the radius of the smaller lens among the entrance lens and the exit lens.

[0039] In an embodiment of the present application, the central normal line of the light receiving surface of the photosensor is perpendicular to the optical axis of the collimating lens group.

[0040] According to another aspect of the present application, the present application further provides a light source device, comprising:

[0041] a light emitting assembly;

[0042] a collimating lens group comprising a collimating support and one or more collimating lenses fixedly connected to the collimating support, the collimating support being arranged on the light emitting side of the light emitting assembly so that the collimating lenses are in the light emitting path of the light emitting assembly; and

[0043] A light quantity detection assembly includes a photosensor fixed to the collimating holder and arranged offset from the optical axis of the collimating lens for receiving stray light formed via the collimating lens group for light quantity detection.

[0044] In one embodiment of the present application, the collimating holder is a lens barrel that assembles and fixes the collimating lens or a support holder that supports and fixes the collimating lens.

[0045] According to another aspect of the present application, the present application further provides a lighting device, comprising:

[0046] A mounting substrate;

[0047] Any of the above light source devices, a plurality of the light source devices are correspondingly fixed to the mounting substrate, and the light emitting assemblies in the plurality of the light source devices are configured to emit monochromatic light of different colors;

[0048] A light combining assembly is correspondingly fixed to the mounting substrate and located on the light emitting side of the plurality of the light source devices, and is configured to combine the multiple channels of monochromatic light from the plurality of the light source devices into one channel of combined light; and

[0049] A housing is fixed to the mounting substrate to cover the light source devices and the light combining assembly, and a side of the housing corresponding to the collimating lens group of the light source devices is an extinction surface.

[0050] In one embodiment of the present application, the light combining assembly includes a plurality of dichroic mirrors arranged at intervals along the combined light path, and each of the dichroic mirrors is arranged with one of the light source devices corresponding to the reflection color of the dichroic mirror on the reflection side of the dichroic mirror.

[0051] In one embodiment of the present application, the lens barrels or collimating holders of the plurality of the light source devices located on the reflection side of the dichroic mirror are integrally connected; and the photosensors of the plurality of the light source devices located on the reflection side of the dichroic mirror share a detection circuit board.

[0052] According to another aspect of the present application, the present application further provides an endoscope, comprising: an endoscope body; and any of the above lighting devices, which is optically connected to the endoscope body for providing illumination for the insertion part of the endoscope body.

[0053] The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the application will be apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF DRAWINGS

[0054] For a better description and illustration of embodiments and / or examples of the inventions disclosed herein, reference can be made to one or more of the accompanying drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the presently described embodiments and / or examples, and the best mode presently understood of these inventions.

[0055] FIG. 1 is a structural schematic diagram of a lighting device according to one embodiment of the present application.

[0056] FIG. 2 is a structural schematic diagram of a lighting device according to one embodiment of the present application.

[0057] FIG. 3 is a structural schematic diagram of a light source device in a lighting device according to one embodiment of the present application.

[0058] FIG. 4 is a structural schematic diagram of a collimating holder in a light source device according to one embodiment of the present application.

[0059] FIG. 5 is a layout schematic diagram of a light source device according to one embodiment of the present application.

[0060] FIG. 6 is a structural schematic diagram of a light quantity detection component in a light source device according to one embodiment of the present application.

[0061] FIG. 7 is a structural schematic diagram of a lighting device according to one embodiment of the present application.

[0062] FIG. 8 is a structural schematic diagram of a lighting device according to another embodiment of the present application.

[0063] FIG. 9 is a cross-sectional schematic diagram of a lighting device according to one embodiment of the present application.

[0064] FIG. 10 is a structural schematic diagram of a light source device in a lighting device according to one embodiment of the present application.

[0065] FIG. 11 is a light path schematic diagram of a light source device according to one embodiment of the present application.

[0066] FIG. 12 is a structural schematic diagram of a light source device in a lighting device according to another embodiment of the present application.

[0067] Main element symbol explanation: 1, lighting device; 10, light source device; 11, light emitting assembly; 111, light emitting element; 112, light emitting circuit board; 12, collimating mirror group; 120, optical axis; 121, light inlet lens; 1210, light inlet surface; 1211, light outlet surface; 122, light outlet lens; 1220, light outlet surface; 1221, light inlet surface; 123, collimating support; 1230, lens barrel; 12301, upper barrel body; 123011, upper clamping groove; 12302, lower barrel body; 123021, lower clamping groove; 1231, detection window; 12311, through hole; 12312, mounting groove; 1232, base; 124, spacer; 125, collimating lens; 13, light quantity detection assembly; 130, light transmission channel; 131, photoelectric sensor; 1310, light sensing surface; 132, detection circuit board; 133, attenuation sheet; 134, light transmission member; 1340, light transmission hole; 135, light filtering member; 136, light homogenizing member; 137, diaphragm; 138, adhesive member; 20, mounting substrate; 30, light combining assembly; 31, dichroic mirror; 40, housing.

[0068] The above main element symbol explanation further details the present application in combination with the accompanying drawings and specific embodiments. Specific embodiments

[0069] The following description is provided to enable any person skilled in the art to practice the present application. The embodiments disclosed in the following description are only examples of implementing the present application and the skilled person can think of other obvious variations. The essential principles of the present application defined in the following description can be applied to other embodiments, variations, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0070] Those skilled in the art should understand that in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as limiting the present application.

[0071] In the present application, the term "one" in the claims and the description should be understood as "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple. Unless it is explicitly shown in the disclosure of the present application that the number of the element is only one, the term "one" cannot be understood as unique or single, and the term "one" cannot be understood as a limitation on the number.

[0072] In the description of the present application, it needs to be understood that "first", "second", and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance. In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through a medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0074] Referring to FIGS. 1 to 8 of the drawings accompanying the present application, an endoscope is provided according to one embodiment of the present application. The endoscope can include an endoscope body (not shown in the drawings) and an illumination device 1 which is light-guidedly connected to the endoscope body for providing illumination for an insertion portion of the endoscope body. It can be understood that the endoscope body of the present application can be connected to the illumination device 1 for providing illumination for the insertion portion, but is not limited to this.

[0075] As shown in FIG. 1, the illumination device 1 can include a plurality of light source devices 10, a mounting substrate 20, and a light combining assembly 30. The plurality of light source devices 10 are correspondingly fixed to the mounting substrate 20, and the plurality of light source devices 10 are used to emit monochromatic light of different colors. The light combining assembly 30 is correspondingly fixed to the mounting substrate 20 and located on the light emitting side of the plurality of light source devices 10, and is used to combine the multiple monochromatic light from the plurality of light source devices 10 into one combined color light, so as to provide the required illumination for the insertion portion of the endoscope body. It can be understood that in other embodiments of the present application, the illumination device 1 can also only include one light source device 10, and still can provide illumination for the insertion portion of the endoscope body.

[0076] As shown in FIG. 2 and FIG. 3, the light source device 10 can include a light emitting assembly 11, a collimating mirror set 12, and a light quantity detection assembly 13. The collimating mirror set 12 is arranged on the light emitting side of the light emitting assembly 11 and is used for collimating the light rays emitted via the light emitting assembly 11; the collimating mirror set 12 includes an entrance lens 121 arranged adjacent to the light emitting assembly 11 and an exit lens 122 arranged away from the light emitting assembly 11. The light quantity detection assembly 13 includes a photoelectric sensor 131 arranged away from the optical axis 120 of the collimating mirror set 12; the photoelectric sensor 131 is located between the entrance surface 1210 of the entrance lens 121 and the exit surface 1220 of the exit lens 122 and is used for receiving stray light formed via the collimating mirror set 12 for light quantity detection. It can be understood that the photoelectric sensor 131 mentioned in the present application can be, but is not limited to, a sensor such as a photoresistor or a photodiode.

[0077] According to conventional views, the photoelectric sensor is arranged at the position of the collimating mirror set and cannot directly receive the light rays emitted by the light emitting assembly, so the related light quantity detection scheme usually ignores the arrangement of the photoelectric sensor at the collimating mirror set for light quantity detection. However, the inventors of the present application have found through observation and research that even if the lens surfaces in the collimating mirror set are polished to an optical level, a part of the scattered light rays will still be randomly diffused in the cavity between the lenses, and a certain probability of reflection will also occur on the lens surfaces due to the presence of Fresnel reflection, increasing the light quantity of the stray light in the cavity; therefore, the collimating mirror set 12 will scatter part of the light rays to the surrounding to form stray light while collimating the light rays emitted via the light emitting assembly 11, and the intensity of the stray light is proportional to the intensity of the light rays incident on the collimating mirror set 12 and also proportional to the intensity of the light rays emitted via the light emitting assembly 11, so the light source device 10 of the present application arranges the photoelectric sensor 131 between the entrance surface 1210 of the entrance lens 121 and the exit surface 1220 of the exit lens 122 to receive the stray light formed via the collimating mirror set 12 for light quantity detection; at the same time, since the incident light of the collimating mirror set 12 is mainly the light rays emitted via the light emitting assembly 11 within the available light emitting range, it can more directly and accurately reflect the light source brightness of the light emitting assembly 11, so the photoelectric sensor 131 of the present application can more accurately detect the light source light quantity.

[0078] In addition, the photoelectric sensor 131 located between the entrance surface 1210 of the entrance lens 121 and the exit surface 1220 of the exit lens 122 is far away from the light emitting assembly 11 and will not be directly affected by the light rays emitted via the light emitting assembly 11, which can greatly reduce the influence of the heating of the light emitting assembly 11 and help to ensure the accuracy of light quantity detection.

[0079] It can be understood that the collimating lens set 12 can further include one or more intermediate lenses between the light-in lens 121 and the light-out lens 122 in addition to the light-in lens 121 and the light-out lens 122; that is, the collimating lens set 12 can include two or more collimating lenses 125 as long as the required light collimation effect is met, and the present application will not be repeated here. Of course, in other embodiments of the present application, the collimating lens set 12 can also only include one collimating lens 125, which can still collimate light.

[0080] As shown in FIGS. 2-5, the collimating lens set 12 further includes a collimating bracket 123 fixedly connected with the collimating lens 125, which is located on the light-emitting side of the light-emitting assembly 11 so that the collimating lens 125 is coaxially located in the light-emitting path of the light-emitting assembly 11, facilitating collimation of light emitted by the light-emitting assembly 11.

[0081] Optionally, the distance S between the photoelectric sensor 131 and the optical axis 120 of the collimating lens set 12 is greater than the radius R of the smaller lens of the light-in lens 121 and the light-out lens 122 min ; that is, if the radius R1 of the light-in lens 121 is less than the radius R2 of the light-out lens 122, the distance S between the photoelectric sensor 131 and the optical axis 120 of the collimating lens set 12 is greater than the radius R1 of the light-in lens 121, i.e., S > R min = R1; if the radius R1 of the light-in lens 121 is greater than the radius R2 of the light-out lens 122, the distance S between the photoelectric sensor 131 and the optical axis 120 of the collimating lens set 12 is greater than the radius R2 of the light-out lens 122, i.e., S > R min = R2. In this way, the photoelectric sensor 131 only uses stray light formed by the collimating lens set 12 for light quantity detection, does not block the collimating light path of the collimating lens set 12, avoids interference with the collimation effect of the collimating lens set 12, and enables the lighting device 1 to provide better lighting effect.

[0082] In some embodiments, as shown in FIG. 3, the central normal of the light-sensitive surface 1310 of the photoelectric sensor 131 is perpendicular to the optical axis 120 of the collimating lens set 12, so that the light-sensitive surface 1310 of the photoelectric sensor 131 can receive stray light scattered at the optical axis by the collimating lens set 12, so as to more truly reflect the light quantity of the light-emitting assembly 11, and help to further improve the accuracy of light quantity detection.

[0083] Optionally, as shown in FIG. 3, the light-sensing surface 1310 of the photoelectric sensor 131 is located between the light-out surface of the light-in lens 121 and the light-in surface of the light-out lens 122, i.e. the light-sensing surface 1310 of the photoelectric sensor 131 is located in the cavity between the light-in lens 121 and the light-out lens 122, so as to better receive the stray light formed by the collimating mirror group 12 and emitted by the light-emitting assembly 11 for light quantity detection.

[0084] Optionally, the axial distance between the light-sensing surface center of the photoelectric sensor 131 and the light-in surface 1210 of the light-in lens 121 is equal to the axial distance between the light-sensing surface center of the photoelectric sensor 131 and the light-out surface 1220 of the light-out lens 122, so that the light-sensing surface of the photoelectric sensor 131 is located at a position with stronger stray light between the light-in lens 121 and the light-out lens 122, so as to receive stray light for light quantity detection. It can be understood that the axial distance between the light-sensing surface center of the photoelectric sensor 131 and the light-in surface 1210 of the light-in lens 121 is greater than one millimeter; the axial distance between the light-sensing surface center of the photoelectric sensor 131 and the light-out surface 1220 of the light-out lens 122 is also greater than one millimeter, so as to meet the assembly requirements.

[0085] Optionally, as shown in FIG. 3, the light-sensing surface 1310 of the photoelectric sensor 131 is implemented as a plane and is parallel to the optical axis 120 of the collimating mirror group 12, so as to adapt to a scene with weaker stray light and obtain accurate light quantity detection results. Of course, in other embodiments of the present application, the light-sensing surface 1310 of the photoelectric sensor 131 can also be arranged obliquely relative to the optical axis 120 of the collimating mirror group 12, so as to adapt to a scene with stronger stray light and avoid the problem of range overflow of the photoelectric sensor 131. It can be understood that the light-sensing surface 1310 of the photoelectric sensor 131 mentioned in the present application can also be implemented as a curved surface or other surface type, as long as it can receive stray light for light quantity detection, which will not be described herein.

[0086] Optionally, as shown in FIG. 2 and FIG. 3, the collimating bracket 123 comprises a lens barrel 1230 coaxially assembling the light-in lens 121 and the light-out lens 122, and a detection window 1231 is formed in a circumferential wall of the lens barrel 1230 corresponding to the photoelectric sensor 131. In this way, the photoelectric sensor 131 can directly receive stray light scattered to the detection window 1231 via the collimating lens group 12 for light quantity detection; meanwhile, the lens barrel 1230 can ensure that the light quantity detection of the photoelectric sensor 131 is not disturbed by stray light of other light paths, without the need to set a dedicated light shielding structure for the photoelectric sensor 131, so as to accurately detect the light quantity of the current light path, and also helps to reduce the cost. It can be understood that the distance between the two collimating lenses 125 assembled in the lens barrel 1230 is controlled by a spacer (not shown in the figure); the lens barrel 1230 is usually made of light-tight plastic or metal, so only the light passing through the collimating lens 125 can enter the inside of the lens barrel 1230, and therefore it is not necessary to additionally set a light shielding structure, so as to ensure that the photoelectric sensor 131 can only receive stray light formed via the collimating lens group 12, and will not be disturbed by other stray light.

[0087] Optionally, as shown in FIG. 3 and FIG. 4, the detection window 1231 is implemented as a through hole 12311 radially penetrating the circumferential wall of the lens barrel 1230, and the light-receiving surface 1310 of the photoelectric sensor 131 is arranged corresponding to the through hole 12311 for receiving stray light propagating into the through hole 12311. In some embodiments, the through hole 12311 is located at the top of the lens barrel 1230, i.e., the side of the lens barrel 1230 away from the mounting base plate 20, so as to mount the photoelectric sensor 131. It can be understood that in other embodiments of the present application, the through hole 12311 can also be located at the side or bottom of the lens barrel 1230, which will not be described herein again.

[0088] Optionally, as shown in FIG. 3 and FIG. 4, the through hole 12311 extends parallel to the central normal of the light-receiving surface 1310 of the photoelectric sensor 131, i.e., the through hole 12311 extends along the central normal of the light-receiving surface 1310 of the photoelectric sensor 131. For example, when the light-receiving surface 1310 of the photoelectric sensor 131 is a plane, the through hole 12311 extends perpendicularly to the light-receiving surface 1310 of the photoelectric sensor 131, so that the light-receiving surface 1310 of the photoelectric sensor 131 can better receive all stray light entering the through hole 12311. It can be understood that in other embodiments of the present application, the through hole 12311 extends obliquely to the central normal of the light-receiving surface 1310 of the photoelectric sensor 131, so that the light-receiving surface 1310 of the photoelectric sensor 131 can only receive part of the stray light entering the through hole 12311.

[0089] Optionally, as shown in FIG. 3, FIG. 5 and FIG. 6, the light quantity detection assembly 13 further comprises a detection circuit board 132 electrically connected with the photoelectric sensor 131; the detection circuit board 132 is fixed outside the lens barrel 1230, and the photoelectric sensor 131 is located in the through hole 12311 so as to seal the through hole 12311 by the detection circuit board 132, thereby avoiding the interference of external stray light on the light quantity detection of the photoelectric sensor 131.

[0090] Optionally, as shown in FIG. 3, the light quantity detection assembly 13 further comprises an attenuation sheet 133 arranged on the light receiving side of the photoelectric sensor 131, which can reduce the light intensity received by the photoelectric sensor 131, thereby avoiding the range overflow of the photoelectric sensor 131 due to the too high light intensity of stray light, and further causing the inaccurate detection result of the photoelectric sensor 131. For example, the attenuation sheet 133 can be implemented as a plastic plate or glass such as PC (polycarbonate) fixed in the through hole 12311, which has a certain transmittance. It can be understood that the attenuation sheet 133 can be fixed by, but not limited to, glue or screws.

[0091] Optionally, as shown in FIG. 3 and FIG. 4, the through hole 12311 is implemented as a stepped hole, the inner opening of the stepped hole is smaller than the outer opening of the stepped hole, and the photoelectric sensor 131 is located at the outer opening of the stepped hole, so that the inner opening of the stepped hole functions as a diaphragm to limit the light quantity, thereby avoiding the range overflow of the photoelectric sensor 131; at the same time, the stepped hole mentioned in the present application also facilitates the installation of the attenuation sheet 133. It can be understood that in other embodiments of the present application, the through hole 12311 can also be implemented as a straight hole or a tapered hole, as long as the photoelectric sensor 131 located in the through hole 12311 can receive the stray light formed by the collimator lens group 12, and the present application will not be repeated here.

[0092] As shown in FIG. 1, the light combining assembly 30 can comprise a plurality of dichroic mirrors 31 arranged at intervals along the combined color light path, and each dichroic mirror 31 is arranged with one light source device 10 corresponding to the reflection color of the dichroic mirror 31 on the reflection side of the dichroic mirror 31, so that the monochromatic light of different colors emitted by the plurality of light source devices 10 propagates along the combined color light path to form a combined color light for illumination after being reflected by the plurality of dichroic mirrors 31 respectively. It can be understood that in other embodiments of the present application, the light combining assembly 30 can also be implemented as other types of light combining devices, as long as the required light combining effect can be achieved, and the present application will not be repeated here.

[0093] Optionally, as shown in FIG. 1 and FIG. 2, the collimating holders 123 in the plurality of light source devices 10 located at the light reflection side of the dichroic mirrors 31 are integrally connected so as to be integrally fixed to the mounting substrate 20, which helps to improve the assembly accuracy and reduce the mounting difficulty. It can be understood that in other embodiments of the present application, the collimating holders 123 in the plurality of light source devices 10 located at the light reflection side of the dichroic mirrors 31 can also be separate and independently fixed to the mounting substrate 20.

[0094] Optionally, as shown in FIG. 5 and FIG. 6, the photosensors 131 in the plurality of light source devices 10 located at the light reflection side of the dichroic mirrors 31 share a detection circuit board 132, i.e. the plurality of photosensors 131 are correspondingly attached to the detection circuit board 132, so as to simplify the assembly process.

[0095] As shown in FIG. 1, the light transmission side of the outermost dichroic mirror 31 can also be arranged with a light source device 10 corresponding to the light transmission color of all dichroic mirrors 31, and the light emitted by the light source device 10 sequentially transmits through all dichroic mirrors 31 to propagate along the combined light path.

[0096] Optionally, as shown in FIG. 6, the photosensors 131 in all light source devices 10 share a detection circuit board 132; at this time, the detection circuit board 132 can be implemented as an L-shaped circuit board to provide a carrier for all photosensors 131.

[0097] For example, as shown in FIG. 1 and FIG. 6, the number of dichroic mirrors 31 is implemented as four, and the number of light source devices 10 is implemented as five; one light source device 10 and four dichroic mirrors 31 are sequentially arranged along the combined light path on the mounting substrate 20, and the remaining four light source devices 10 are correspondingly arranged at the light reflection side of the four dichroic mirrors 31. At the same time, all photosensors 131 in the five light source devices 10 share the same L-shaped detection circuit board 132 to match the lighting arrangement of the lighting device 1.

[0098] Optionally, as shown in FIG. 2 and FIG. 3, the light emitting assembly 11 includes a light emitting element 111 and a light emitting circuit board 112 to which the light emitting element 111 is electrically and fixedly connected, and the light emitting circuit board 112 is correspondingly fixed to the mounting substrate 20 so that the collimating mirror group 12 is located in the light emitting path of the light emitting element 111. It can be understood that the light emitting element 111 can be but not limited to be implemented as a light source such as an LED or a xenon lamp.

[0099] Optionally, as shown in FIG. 1 and FIG. 2, the light emitting elements 111 in the plurality of light source devices 10 located at the light reflection side of the dichroic mirrors 31 share the same light emitting circuit board 112, so as to reduce the assembly difficulty.

[0100] It is worth noting that although there is a small gap between the light emitting element 111 and the collimating holder 123, a part of light will leak from the side, but considering the Lambertian light emitting characteristic of a conventional LED, the light emitting intensity of the light emitting element 111 changes with the cosine of the angle, that is, the light intensity is the largest when it is perpendicular to the light emitting surface and is zero when it is parallel to the light emitting surface, so the light intensity leaked from the above gap is very small; at the same time, this part of the leaked light will also be further lost by Fresnel reflection on the light entrance surface of the collimating lens group 12 corresponding to the nearby LED, so the leaked light incident on the photosensor 131 corresponding to the nearby LED will be very small and can be ignored.

[0101] In addition, in an embodiment of the present application, as shown in FIG. 7, the central normal line of the light receiving surface 1310 of the photosensor 131 can also be non-coplanar with the optical axis 120 of the collimating lens group 12, so that the light receiving surface 1310 of the photosensor 131 can receive stray light scattered at the edge via the collimating lens group 12, so as to reduce the amount of stray light received via the photosensor 131, so as to adapt to scenes with strong stray light and avoid the problem of range overflow of the photosensor 131. At the same time, the through hole 12311 can extend radially relative to the central normal line of the light receiving surface 1310 of the photosensor 131, that is, the central axis of the through hole 12311 is perpendicular to the optical axis 120 of the collimating lens group 12.

[0102] In other embodiments of the present application, the detection window 1231 can also be implemented as a notch axially penetrating the peripheral wall of the lens barrel 1230 (not shown in the figure); the detection circuit board 132 of the light quantity detection assembly 13 is fixed to the lens barrel 1230 to block the notch, so that the photosensor 131 can still only receive stray light formed via the collimating lens group 12 without being disturbed by other stray light.

[0103] As shown in FIG. 4 and FIG. 7, the collimating holder 123 can also include a base 1232 integrally connected with the lens barrel 1230, and the base 1232 is fixedly connected to the mounting substrate 20, so as to integrally fix the collimating lens group 12 and the light quantity detection assembly 13 to the mounting substrate 20. It can be understood that in other embodiments of the present application, the base 1232 can also be connected separately from the lens barrel 1230, and the light source device 10 can still be fixed to the mounting substrate 20, which will not be described herein.

[0104] In addition, in an embodiment of the present application, as shown in FIG. 3 and FIG. 4, the lens barrel 1230 has an integrated cylindrical structure to coaxially assemble and fix the collimating lens 125 by means of a spacer; of course, in other embodiments of the present application, the lens barrel 1230 can also have a split cylindrical structure to coaxially assemble and fix the collimating lens 125 by means of clamping fixation.

[0105] It is worth noting that in one embodiment of the present application, as shown in FIG. 8, the lens barrel 1230 in the collimation bracket 123 can be implemented as a split lens barrel formed by the upper barrel 12301 and the lower barrel 12302 being buckled to each other, so as to clamp and fix the collimation lens 125 between the upper barrel 12301 and the lower barrel 12302.

[0106] Optionally, as shown in FIG. 8, the detection window 1231 is implemented as a mounting groove 12312 recessed from the inner circumferential wall of the lens barrel 1230, and the photoelectric sensor 131 is fixed in the mounting groove 12312 so as to receive stray light formed by the collimation lens group 12 to perform light quantity detection.

[0107] For example, as shown in FIG. 8, the upper barrel 12301 has an upper clamping groove 123011 opening downward; the lower barrel 12302 is provided with a lower clamping groove 123021 opening upward, so that when the upper barrel 12301 is buckled to the lower barrel 12302, the upper clamping groove 123011 and the lower clamping groove 123021 are aligned with each other to form the mounting groove 12312 clamping and fixing the detection circuit board 132, so that the photoelectric sensor 131 is stably held in the lens barrel 1230.

[0108] In addition, as shown in FIG. 8, in the collimation bracket 123 of one embodiment of the present application, the base 1232 is integrally connected to the lower barrel 12302, and the split lens barrel 1230 can still be fixed to the mounting base plate 20 through the base 1232.

[0109] In some embodiments, as shown in FIG. 8, the upper barrel 12301 in the plurality of light source devices 10 located on the light reflection side of the dichroic mirror 31 is integrally connected; the lower barrel 12302 and the base 1232 in the plurality of light source devices 10 located on the light reflection side of the dichroic mirror 31 are integrally connected. At the same time, the light quantity detection assembly 13 in the plurality of light source devices 10 located on the light reflection side of the dichroic mirror 31 is independent of each other.

[0110] It is worth noting that in other embodiments of the present application, the detection window 1231 can also be implemented as a notch (not shown in the figure) axially penetrating the circumferential wall of the lens barrel 1230; the detection circuit board 132 is fixed to the lens barrel 1230 to block the notch, and the photoelectric sensor 131 is located in the notch to receive stray light formed by the collimation lens group 12.

[0111] According to another aspect of the present application, as shown in FIGS. 2-8, one embodiment of the present application further provides a light source device 10, which can include a light emitting assembly 11, a collimating mirror set 12, and a light quantity detecting assembly 13; the collimating mirror set 12 includes a collimating support 123 and one or more collimating lenses 125 fixedly connected to the collimating support 123; the collimating support 123 is arranged at the light emitting side of the light emitting assembly 11 so that the collimating lenses 125 are in the light emitting path of the light emitting assembly 11; the light quantity detecting assembly 13 includes a photoelectric sensor 131 fixedly arranged on the collimating support 123 and offset from the optical axis of the collimating lenses 125, for receiving stray light formed via the collimating mirror set 12 to perform light quantity detection. In this way, the light source device 10 of the present application only needs to directly install the photoelectric sensor 131 on the collimating support 123 of the collimating mirror set 12 for light quantity detection without the need for additional structural members, which helps to reduce costs.

[0112] It is worth noting that the collimating support 123 of the present application can be implemented as a support body (not shown in the figures) supporting and fixing the collimating lenses 125, as long as it can hold the collimating lenses 125 in the light emitting path of the light emitting assembly 11, and the photoelectric sensor 131 can still be installed without additional structural members, which will not be described in detail herein.

[0113] It is worth noting that, as shown in FIGS. 9-12, one embodiment of the present application further provides a lighting device 1. The lighting device 1 can include a plurality of light source devices 10, a mounting substrate 20, a light combining assembly 30, and a housing 40. The plurality of light source devices 10 are correspondingly fixed to the mounting substrate 20, and the plurality of light source devices 10 are used to emit single-color light of different colors. The light combining assembly 30 is correspondingly fixed to the mounting substrate 20 and located at the light emitting side of the plurality of light source devices 10, for combining the multiple channels of single-color light from the plurality of light source devices 10 into one channel of combined light, so as to provide the required illumination for the insertion part of the endoscope body. The housing 40 is fixed to the mounting substrate 20 to cover the light source devices 10 and the light combining assembly 30, and the side of the housing 40 corresponding to the collimating mirror set 12 of the light source devices 10 is a light extinction surface. In this way, the housing 40 not only can shield the external ambient light to avoid adversely affecting the light combining illumination and light quantity detection, but even if the light combining assembly 30 reflects the detection light emitted by other light source devices 10 to the side of the housing 40 corresponding to the collimating mirror set, this part of the detection light will be absorbed by the light extinction surface and will not be reflected or scattered again, avoiding entering the collimating mirror set 12 to form interference light and as much as possible avoiding adversely affecting the detection results of the photoelectric sensor 131.

[0114] Wherein, the interference light is defined as A, and the detection light is defined as B.

[0115] It can be understood that the matting surface mentioned in the present application can be obtained by matting treatment such as spraying matting paint, anodic oxidation or setting a light well, but is not limited thereto, as long as the surface emission and scattering phenomenon can be eliminated, and the interference light can be inhibited from interfering with the photoelectric sensor 131.

[0116] It is worth noting that, as shown in FIGS. 10 and 11, in the lighting device 1 of one embodiment of the present application, the collimating lens group 12 of the light source device 10 can include an entrance lens 121 arranged adjacent to the light emitting assembly 11, an exit lens 122 arranged away from the light emitting assembly 11, and a lens barrel 1230, the entrance lens 121 and the exit lens 122 being coaxially assembled in the lens barrel 1230 to form a closed space between an exit surface 1211 of the entrance lens 121 and an entrance surface 1221 of the exit lens 122; a detection window 1231 is formed in a circumferential wall of the lens barrel 1230, and the detection window 1231 is located between the exit surface 1211 of the entrance lens 121 and the entrance surface 1221 of the exit lens 122; the photoelectric sensor 131 is arranged at a position corresponding to the detection window 1231, deviating from the optical axis of the collimating lens group 12. In this way, the photoelectric sensor 131 can directly receive stray light scattered to the detection window 1231 via the collimating lens group 12 for light quantity detection; at the same time, the lens barrel 1230 can coaxially position the entrance lens 121 and the exit lens 122 in the collimating lens group 12, ensuring collimation effect, and can also shield stray light incident to the collimating lens group 12 from the outside of the lens barrel 1230, avoiding the stray light outside the lens barrel 1230 from affecting the collimated light output by the collimating lens group 12, thereby ensuring that the light quantity detection of the photoelectric sensor 131 is not interfered by stray light of other light paths, and without the need to provide a dedicated light shielding structure for the photoelectric sensor 131, the light quantity of the current light path can be accurately detected, and the cost can also be reduced. In addition, the photoelectric sensor 131 can be arranged outside the circumferential wall of the lens barrel 1230, which not only facilitates installation, but also avoids hindering the light flux of the collimating lens group 12, and makes it more difficult for the interference light to reach the photoelectric sensor 131 outside via the detection window 1231, reducing the interference of stray light.

[0117] Optionally, as shown in FIG. 10, the light-in lens 121 and the light-out lens 122 are arranged with an on-axis gap between the exit surface 1211 of the light-in lens 121 and the entrance surface 1221 of the light-out lens 122; the detection window 1231 is located at the center O of the on-axis gap and is offset to the side of the light-out lens 122. In this way, the center of the detection window 1231 is away from the light-in lens 121 and close to the light-out lens 122, so that most of the interference light (from other light-emitting components or external light) reflected via the exit surface 1211 of the light-in lens 121 is difficult to enter the detection window 1231, while most of the detection light (from the corresponding light-emitting component 11) reflected via the entrance surface 1221 of the light-out lens 122 can smoothly enter the detection window 1231; thereby, not only does it not introduce a large amount of interference light, reducing the interference of interference light, but it also introduces more detection light to be received by the photosensor 131 for light quantity detection.

[0118] As shown in FIG. 10, the on-axis distance L1 between the center of the detection window 1231 and the light-in surface 1210 of the light-in lens 121 is greater than the on-axis distance L2 between the center of the detection window 1231 and the light-out surface 1220 of the light-out lens 122, so that the center of the detection window 1231 is away from the light-in lens 121 and close to the light-out lens 122.

[0119] The light-in lens 121 can be a flat glass or a positive focal lens. In some embodiments, the light-in lens 121 is implemented as a plano-convex lens to optimize the collimation effect and reduce the overall volume of the collimating lens group 12. As shown in FIG. 11, the exit surface 1211 of the light-in lens 121 is convex, so that the interference light reflected by the exit surface 1211 of the light-in lens 121 towards the position of the detection window 1231 is less inclined relative to the optical axis of the collimating lens group 12, and therefore this part of the interference light is irradiated on the inner wall of the detection window 1231 and is difficult to pass through the detection window 1231 to reach the photosensor 131.

[0120] However, as shown in FIG. 11, the entrance surface 1221 of the light-out lens 122 is inclined relative to the optical axis of the collimating lens group 12 to a greater extent for the detection light reflected towards the detection window 1231, so that this part of the detection light can directly pass through the detection window 1231 to reach the photosensor 131.

[0121] In some embodiments, as shown in FIGS. 10 and 11, the incident surface 1221 of the light-out lens 122 is convex, so that the incident surface 1221 of the light-out lens 122 is convex inwardly to the light-in lens 121, making it easier for the direct light from the corresponding light-emitting component 11 to be reflected / scattered to the detection window 1231, while it is more difficult for the external light from other light-emitting components 11 to be reflected / scattered to the detection window 1231, which can improve the proportion of effective detection light, so as to improve the accuracy of light quantity detection.

[0122] It is worth noting that the convex surface type mentioned in the present application is spherical, quadratic or high-order even aspheric. It can be understood that when the convex surface type is implemented as a spherical or quadratic surface, the incident surface 1221 of the light-out lens 122 reduces the collimation performance, but still retains the convex feature, which can reduce the cost while ensuring the reflection of direct light from the corresponding light-emitting component 11; and when the convex surface type is implemented as a high-order even aspheric surface, the incident surface 1221 of the light-out lens 122 can improve the collimation performance while ensuring the reflection of direct light from the corresponding light-emitting component 11, so as to obtain better collimation effect.

[0123] In addition, as shown in FIGS. 10 and 11, the light-out surface 1220 of the light-out lens 122 is a plane, so that the light-out lens 122 presents an inner convex and outer flat shape, so as to clean and protect the optical surface of the light-out lens 122 exposed to the outside. It can be understood that the light-out surface 1220 of the light-out lens 122 can be pasted with an electrostatic protection film and the like due to its exposure to the outside.

[0124] Alternatively, the radial projection of the detection window falls entirely on the incident surface of the light-out lens, which not only makes the interference light reflected by the exit surface 1211 of the light-in lens 121 facing the position of the detection window 1231 inclined to the optical axis of the collimator lens group 12 to a smaller extent, resulting in most of the interference light directly irradiating on the inner wall of the detection window 1231, further increasing the difficulty of the interference light reflected by the exit surface 1211 of the light-in lens 121 passing through the detection window 1231 to reach the photosensor 131, but also makes the detection light reflected by the incident surface 1221 of the light-out lens 122 facing the detection window 1231 inclined to the optical axis of the collimator lens group 12 to a larger extent, avoiding most of the detection light irradiating on the inner wall of the detection window 1231, further reducing the difficulty of the detection light reflected by the incident surface 1221 of the light-out lens 122 passing through the detection window 1231 to reach the photosensor 131, thereby further improving the proportion of effective detection light and avoiding the interference of interference light. It can be understood that in other embodiments of the present application, the radial projection of the detection window 1231 at least partially falls on the incident surface 1221 of the light-out lens 122, so as to increase the amount of detection light while reducing the influence of interference light on light quantity detection.

[0125] As shown in FIGS. 10 and 11, in an embodiment of the present application, the detection window 1231 can be implemented as a through hole 12311 opened in the upper side wall of the lens barrel 1230, so that the photosensor 131 of the light quantity detection assembly 13 is mounted above the lens barrel 1230 to receive upward scattered / reflected detection light for light quantity detection. Not only can the light quantity detection assembly 13 be conveniently disassembled, but also the wiring can be conveniently performed from above the lens barrel 1230 for maintenance. It can be understood that the detection window 1231 can also be a through hole 12311 opened in other side walls of the lens barrel 1230, such as the lower side wall. Although the light quantity detection assembly 13 corresponding to the through hole 12311 can still receive detection light in the corresponding direction for light quantity detection, the installation of the light quantity detection assembly 13 is more difficult. The light quantity detection assembly 13 needs to be installed and wired first, then other optical parts are installed, and finally the whole is fixed on the mounting substrate 20. The signal line of the light quantity detection assembly 13 needs to be wired from the lower part and connected to the main control board. In addition, once the light quantity detection assembly 13 needs to be disassembled and replaced, the entire light source device 10 needs to be disassembled, which is a huge workload.

[0126] Optionally, as shown in FIGS. 10 and 11, the light quantity detection assembly 13 further includes a light transmission member 134 connected with the lens barrel 1230 and provided with a light transmission hole 1340. The light transmission hole 1340 is communicated with the detection window 1231 to form a light transmission channel 130 corresponding to the light receiving surface 1310 of the photosensor 131 and having a length greater than a diameter. In this way, compared with the detection light propagating to the photosensor 131 along the axis direction of the light transmission channel 130, the incident angle of the interference light at the detection window 1231 is often larger, so the interference light will be largely irradiated on the side wall of the light transmission channel 130, and it is difficult to directly propagate to the light receiving surface 1310 of the photosensor 131, which can effectively reduce the interference of the interference light. In addition, the long light transmission channel 130 can increase the optical path of light incident on the photosensor 131, which has a similar effect as a vignetting diaphragm, and can also reduce the receiving range of the detection light to avoid mixing of multi-color light due to receiving a large range of light.

[0127] In some embodiments, the length of the light transmission channel 130 is between 15 mm and 20 mm, so that the light transmission channel 130 with an appropriate length can not only avoid the interference of the interference light due to the short channel, but also avoid occupying a large space inside the light source due to the long channel, which is beneficial to obtaining a good interference light elimination effect while ensuring a small size.

[0128] Optionally, the light transmission member 134 and / or the lens barrel 1230 has a light absorption surface; that is, the light absorption surface can be arranged on the inner wall of the light transmission channel 130 and / or the inner wall of the lens barrel 1230, and the light absorption surface arranged on the inner wall of the light transmission channel 130 can absorb various stray light irradiated thereon without secondary reflection or scattering, so as to avoid the reflected light irradiated on the inner wall of the light transmission channel 130 from entering the photosensitive sensor 131, thereby eliminating the interference light and avoiding the adverse effect on the detection result of the photosensitive sensor 131. It can be understood that the light transmission member 134 and / or the lens barrel 1230 can be directly provided with a light absorption inner surface by using a metal black part or a black plastic part, or can be provided with a light absorption inner surface by using a part of other colors through black spraying / coating, which will not be described herein any further.

[0129] According to one embodiment of the present application, as shown in FIGS. 10 and 11, the light quantity detection assembly 13 can further include a light filter 135 arranged on the light receiving side of the photosensitive sensor 131. In this way, the light filter 135 can only allow light of a corresponding wavelength to pass through, and filter out other wavelengths of interference light, so as to ensure the accuracy of the light quantity detection result. It can be understood that the light filter 135 mentioned in the present application can be implemented as a monochromatic filter or a narrowband filter, but is not limited thereto. In addition, after the light filter 135 is arranged, the inner wall surface of the light transmission member 134 can not be treated for light absorption, but rely on the light filter 135 to filter out all the interference light.

[0130] It is worth noting that since the detection light reflected into the detection window 1231 via the incident surface 1221 of the light-out lens 122 is not uniformly distributed within the detection window 1231, the light quantity detection assembly 13 further comprises a light uniformizing member 136 and a light stop 137, as shown in FIGS. 10 and 11, wherein the light uniformizing member 136 is located in the light path between the light filtering member 135 and the photoelectric sensor 131, and the light stop 137 is located in the light path between the light uniformizing member 136 and the photoelectric sensor 131. In this way, the detection light entering the detection window 1231 first passes through the light uniformizing member 136 for uniformizing, so that the spatial distribution of light intensity within the detection window 1231 is uniform, and then the uniformly distributed detection light passes through the light stop 137; at this time, even if there is an installation deviation of the light stop 137 relative to the detection window 1231, the light quantity passing through the light stop 137 can still be ensured to be constant, so as to weaken the detection deviation caused by the installation deviation; more specifically, if the light uniformizing member 136 is not provided, since the detection light is not uniformly distributed within the detection window 1231, the light quantity passing through the light stop 137 can be significantly different due to the installation deviation. At the same time, the present application can attenuate the light intensity through the light stop 137, so as to weaken the light intensity reaching the photoelectric sensor 131, avoid overexposure (range overflow) of the photoelectric sensor 131, and ensure the detection result of the photoelectric sensor 131 to be accurate. It can be understood that in other embodiments of the present application, the light filtering member 135 can be arranged between the light uniformizing member 136 and the light stop 137, or can also be arranged between the light stop 137 and the photoelectric sensor 131 (i.e. after the light stop 137), as long as the light stop 137 is located after the light uniformizing member 136, and the present application will not be described here.

[0131] In addition, the light filtering member 135, the light uniformizing member 136 and the light stop 137 can be arranged at intervals in the light transmission channel 130, or can be closely stacked in the light transmission channel 130, as long as the light filtering member 135, the light uniformizing member 136 and the light stop 137 are arranged in sequence along the direction close to the photoelectric sensor 131. In this way, the detection light reflected via the incident surface 1221 of the light-out lens 122 first passes through the light filtering member 135 to remove interference light, then passes through the light uniformizing member 136 for uniformizing, so that the spatial distribution of light intensity is more uniform to weaken the detection deviation caused by the installation deviation, and finally passes through the light stop 137 to attenuate the light intensity, limit the light quantity entering the photoelectric sensor 131, and ensure that the photoelectric sensor 131 collects the detection light filtered from the interference light, and the light quantity reaching the photoelectric sensor 131 is stable and meets the range of the photoelectric sensor 131.

[0132] According to one embodiment of the present application, as shown in FIGS. 10 and 11, the detection window 1231 is implemented as a through hole 12311 radially penetrating the peripheral sidewall of the lens barrel 1230; the center line of the light passing hole 1340 is perpendicular to the optical axis 120 of the collimator lens group 12, so that the through hole 12311 and the light passing hole 1340 form a vertical passage, i.e., the center line of the light passing channel 130 is perpendicular to the optical axis 120 of the collimator lens group 12, ensuring that the detection light reflected via the entrance surface 1221 of the light exit lens 122 smoothly passes through the light passing channel 130 to be received by the photosensor 131.

[0133] In some embodiments, as shown in FIGS. 10 and 11, the detection window 1231 is a stepped hole penetrating the peripheral sidewall of the lens barrel 1230, and the light filter 135, the light homogenizer 136 and the diaphragm 137 are sequentially arranged in the stepped hole. In some embodiments, the light passing member 134 abuts against the diaphragm 137 from the outside of the lens barrel 1230. In this way, the diaphragm 137 can be replaceably mounted in the stepped hole of the lens barrel 1230, so as to replace the diaphragm 137 with different apertures according to the light intensity requirement, thereby receiving an appropriate amount of detection light for light quantity detection while ensuring that the photosensor 131 does not overexpose, and ensuring the accuracy of the detection result. It can be understood that the light filter 135, the light homogenizer 136 and the diaphragm 137 can also be fixed in the stepped hole by glue dispensing.

[0134] It is worth noting that in other embodiments of the present application, the light filter 135, the light homogenizer 136 and the diaphragm 137 can also be assembled in the light passing hole 1340 of the light passing member 134, which will not be described herein again. In addition, the light passing member 134 of the present application can also be integrally connected to the lens barrel 1230 as a part of the lens barrel 1230.

[0135] In some embodiments, as shown in FIGS. 10 and 11, the through hole 12311 is implemented as a circular hole, which is beneficial to reduce the processing difficulty; at the same time, it can also match the circular light filter 135, the light homogenizer 136 and the diaphragm 137, avoiding the need for custom processing of special shapes, which helps to save custom time.

[0136] It is worth noting that, as shown in FIG. 12, in the light source device 10 of one embodiment of the present application, the light passing hole 1340 can also extend obliquely relative to the optical axis 120 of the collimating lens group 12, so that the light passing channel 130 formed by the detection window 1231 and the light passing hole 1340 is oblique or bent, so that a large amount of interference light can directly irradiate the inner wall of the channel, without irradiating the light sensitive surface 1310 of the photosensor 131, thereby effectively eliminating the interference of the interference light. It can be understood that when the detection window 1231 is a through hole radially penetrating the peripheral wall of the lens barrel 1230, the light passing channel 130 is bent; when the detection window 1231 is a through hole obliquely penetrating the peripheral wall of the lens barrel 1230, the light passing channel 130 can be oblique.

[0137] In some embodiments, as shown in FIG. 12, the light passing hole 1340 extends from the detection window 1231 towards the direction away from the incident surface 1221 of the light emitting lens 122, which can maximize the elimination of the interference of the interference light while ensuring that the detection light reflected by the incident surface 1221 of the light emitting lens 122 can smoothly pass through the light passing channel 130 to irradiate the photosensor 131.

[0138] According to one embodiment of the present application, as shown in FIGS. 9-12, the collimating lens group 12 can further include a lens barrel 1230 provided with a detection window 1231 and a spacer 124 arranged in the lens barrel 1230; the spacer 124 abuts between the exit surface 1211 of the light entering lens 121 and the incident surface 1221 of the light emitting lens 122, and the inner diameter of the spacer 124 gradually increases from the exit surface 1211 of the light entering lens 121 to the incident surface 1221 of the light emitting lens 122. In this way, the spacer 124 can further block the interference light reflected by the exit surface 1211 of the light entering lens 121 while precisely and firmly assembling the light entering lens 121 and the light emitting lens 122 in the lens barrel 1230, preventing the interference light from being incident to the detection window 1231, and completely eliminating the interference of the interference light. It can be understood that the inner wall surface of the spacer 124 can be jagged, or can be stepped, or can also be treated to eliminate light, so as to further eliminate the interference of the interference light.

[0139] In addition, as shown in FIGS. 10-12, the light quantity detection assembly 13 can further include an adhesive 138 for bonding and fixing the detection circuit board 132 to the light passing member 134, so as to seal the gap between the detection circuit board 132 and the light passing member 134, so that the photosensor 131 mounted on the detection circuit board 132 is in a sealed space, avoiding the interference of external ambient light.

[0140] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0141] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A light source device, characterized in that, include: Light-emitting components; A collimating lens group, disposed on the light-emitting side of the light-emitting component and used to collimate the light emitted via the light-emitting component, comprises an incident lens disposed adjacent to the light-emitting component and an exit lens disposed away from the light-emitting component; and The light intensity detection component includes a photoelectric sensor offset from the optical axis of the collimating lens group. The photoelectric sensor is located between the light-incident surface of the incident lens and the light-exiting surface of the exit lens, and is used to receive stray light generated by the collimating lens group for light intensity detection.

2. The light source device according to claim 1, wherein, The collimating lens group further includes a lens barrel, and the incident lens and the exiting lens are coaxially assembled inside the lens barrel to form a closed space between the exiting surface of the incident lens and the incident surface of the exiting lens. The peripheral sidewall of the lens barrel is provided with a detection window, which is located between the exit surface of the incident lens and the incident surface of the exit lens; the photoelectric sensor is set off from the optical axis of the collimating lens group at a position corresponding to the detection window; The incident lens and the exiting lens are arranged at intervals to form an on-axis gap between the exit surface of the incident lens and the incident surface of the exiting lens; the detection window is located at the center of the on-axis gap, biased toward one side of the exiting lens.

3. The light source device according to claim 2, wherein, The incident surface of the light-emitting lens is a convex surface; The radial projection of the detection window falls at least partially on the incident surface of the light-emitting lens.

4. The light source device according to claim 2, wherein, The incident surface of the light-emitting lens is convex, and the radial projection of the detection window falls entirely on the incident surface of the light-emitting lens.

5. The light source device according to claim 2, wherein, The detection window is a through hole formed in the upper side wall of the lens barrel; The through hole is a round hole.

6. The light source device according to claim 2, wherein, The incident surface of the light-emitting lens is a convex surface, and the surface shape of the convex surface is a sphere, a quadratic surface, or a higher-order even-order aspherical surface.

7. The light source device according to claim 1, wherein, The collimating lens assembly further includes a lens barrel with a detection window on its peripheral sidewall; the light quantity detection component also includes a light-transmitting component connected to the lens barrel and having a light-transmitting hole, the light-transmitting hole being connected to the detection window to form a light-transmitting channel corresponding to the photosensitive surface of the photoelectric sensor and having a length greater than its diameter. The length of the light transmission channel is between 15mm and 20mm. The light-transmitting component and / or the lens barrel have an matting surface.

8. The light source device according to claim 7, wherein, The detection window is a through hole that radially penetrates the peripheral sidewall of the lens barrel; the center line of the light-transmitting hole is perpendicular to the optical axis of the collimating lens group; Alternatively, the light-transmitting aperture extends obliquely relative to the optical axis of the collimating lens group; the light-transmitting aperture extends from the detection window toward the incident surface away from the light-emitting lens.

9. The light source device according to claim 1, wherein, The light intensity detection component also includes a filter element, which is located on the photosensitive side of the photoelectric sensor; The light intensity detection component further includes a light homogenizer and an aperture, wherein the light homogenizer is located in the optical path between the light filter and the photoelectric sensor, and the aperture is located in the optical path between the light homogenizer and the photoelectric sensor; The collimating lens assembly further includes a lens barrel with a detection window on its peripheral sidewall; the detection window is a stepped hole penetrating the peripheral sidewall of the lens barrel, and the filter, the light homogenizer, and the aperture are sequentially disposed within the stepped hole.

10. The light source device according to claim 1, wherein, The collimating lens assembly further includes a lens barrel with a detection window and a spacer disposed within the lens barrel; the incident lens and the exiting lens are coaxially assembled within the lens barrel, the spacer abuts between the exiting surface of the incident lens and the incident surface of the exiting lens, and the inner diameter of the spacer gradually increases from the exiting surface of the incident lens to the incident surface of the exiting lens.

11. The light source device according to claim 1, wherein, The collimating lens assembly further includes a lens barrel with a detection window; the detection window is a mounting groove recessed from the inner peripheral wall of the lens barrel, and the photoelectric sensor is fixed within the mounting groove; the lens barrel is a split-type lens barrel formed by the interlocking of an upper barrel and a lower barrel; the light quantity detection assembly further includes a detection circuit board that is electrically mounted to the photoelectric sensor; the upper barrel has an upper slot with an opening facing downwards, and the lower barrel has a lower slot with an opening facing upwards, so that when the upper barrel is interlocked with the lower barrel, the upper slot and the lower slot are aligned with each other to form the mounting groove for locking and fixing the detection circuit board.

12. The light source device according to claim 1, wherein, The collimating lens assembly further includes a lens barrel with a detection window; the detection window is a through hole that radially penetrates the peripheral sidewall of the lens barrel, and the photosensitive surface of the photoelectric sensor is arranged corresponding to the through hole to receive stray light propagating into the through hole; the through hole extends parallel to or obliquely relative to the central normal of the photosensitive surface of the photoelectric sensor; the light intensity detection assembly further includes a detection circuit board that is electrically mounted to the photoelectric sensor; the detection circuit board is fixed to the outside of the lens barrel, and the photoelectric sensor is located inside the through hole.

13. The light source device according to any one of claims 1 to 12, wherein, The distance between the photoelectric sensor and the optical axis of the collimating lens group is greater than the radius of the smaller lens among the incident lens and the exit lens; The center normal of the photosensitive surface of the photosensitive sensor is perpendicular to the optical axis of the collimating lens group.

14. A light source device, characterized in that, include: Light-emitting components; A collimating lens assembly includes a collimating bracket and one or more collimating lenses fixedly connected to the collimating bracket. The collimating bracket is disposed on the light-emitting side of the light-emitting component so that the collimating lenses are in the light-emitting path of the light-emitting component. as well as The light intensity detection assembly includes a photoelectric sensor fixed to the collimating bracket and arranged off-axis from the collimating lens, for receiving stray light formed by the collimating lens group for light intensity detection.

15. A lighting device, characterized in that, include: Mounting substrate; A plurality of light source devices as described in any one of claims 1 to 14, wherein the plurality of light source devices are correspondingly fixed to the mounting substrate, and the light-emitting components in the plurality of light source devices are used to emit monochromatic light of different colors; A light combining component is correspondingly fixed to the mounting substrate and located on the light-emitting side of the plurality of light source devices, for combining multiple monochromatic lights from the plurality of light source devices into a single color-combining light; as well as The housing is fixed to the mounting base to cover the light source device and the light combining assembly, and the side of the housing corresponding to the collimating lens group of the light source device is an extinction surface.

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