CN221483434U - Lighting structure - Google Patents

Abstract

The utility model provides an illumination structure which comprises a condensing lens, a light source, an incident lens group, an emergent lens group and an imaging system. The condensing lens is covered at one end of the incident lens group facing the light source, and the light source is arranged in the condensing lens. The incident lens group is used for transmitting the light rays of the light source to the emergent lens group. One end of the emergent lens group is used for receiving the light rays from the incident lens group, and the other end of the emergent lens group is used for projecting the light rays to the imaging system. The imaging system is used for guiding light. The light beam emitted backwards can be gathered by arranging the condensing lens at the rear side of the light source, so that the light source utilization rate of the illumination structure can be effectively improved. The front side of the light source is sequentially provided with an incident lens group, an emergent lens group and an imaging system, light rays emitted by the light source are emitted into the incident lens group, then are emitted into the emergent lens group by the incident lens group, and after being emitted from the emergent lens group, projection imaging is realized in the imaging system. By means of the arrangement, the light source utilization rate of the lighting structure can be effectively improved under the condition that the brightness of the light source is not changed.

Description

Lighting structure

Technical Field

The utility model belongs to the technical field of optical fiber light sources, and particularly relates to an illumination structure.

Background

The optical fiber light sources are mainly divided into halogen lamps, LED lamp boxes, lasers and the like according to the light sources, and light emitted by the light sources is transmitted to a target object/imaging system through optical fibers.

The light emitted by the light source such as the halogen lamp is generally in Gaussian distribution, and the focal plane diameter of the imaging system is generally far smaller than that of the collecting lens, so that the light source is directly used for illumination, and the energy utilization rate of the light source is very low. If a general light guide is used for guiding the light source, the light guide cannot realize conformal output, and the input Gaussian beam can become a beam with uniform brightness, so that energy loss is further caused.

However, the brightness of the halogen lamp in the prior art is low relative to the brightness of the LED light box, and most of the energy of the halogen lamp is used for heating, not received by the target object/imaging system, the effective brightness is low, and the effective light source utilization is low.

Therefore, how to effectively improve the light source utilization rate of the lighting structure without changing the brightness of the light source is a problem to be solved by those skilled in the art.

Disclosure of utility model

The utility model aims to provide an illumination structure, which can effectively improve the light source utilization rate of the illumination structure under the condition of not changing the brightness of a light source.

In order to solve the above technical problems, the present utility model provides an illumination structure, including: the device comprises a condensing lens, a light source, an incident lens group, an emergent lens group and an imaging system;

The condensing lens is covered at one end of the incident lens group, which faces the light source, and the light source is arranged in the condensing lens;

the incident lens group is used for transmitting the light rays of the light source to the emergent lens group;

One end of the emergent lens group is used for receiving light rays from the incident lens group, and the other end of the emergent lens group is used for projecting the light rays to the imaging system;

the imaging system is used for guiding light.

Optionally, in the above illumination structure, the condenser lens, the light source, the incident lens group, the exit lens group, and the imaging system are coaxially arranged.

Optionally, in the above-mentioned illumination structure, the collecting lens, the light source and the incident lens group are coaxially arranged, the exit lens group and the imaging system are coaxially arranged, an included angle is formed between the incident lens group and the exit lens group, and a plane turning lens is arranged at a connecting end of the incident lens group and the exit lens group.

Optionally, in the above illumination structure, a focal plane diameter of the incident lens group is greater than or equal to a focal plane diameter of the condenser lens.

Optionally, in the above illumination structure, a difference between the focal plane diameter of the incident lens group and the focal plane diameter of the condensing lens is 0.5 mm to 1 mm, or a ratio of a difference between the focal plane diameter of the incident lens group and the focal plane diameter of the condensing lens to the focal plane diameter of the condensing lens is 3% to 5%.

Optionally, in the above illumination structure, a focal plane diameter of the exit lens group is greater than or equal to a focal plane diameter of the imaging system.

Optionally, in the above illumination structure, a difference between a focal plane diameter of the exit lens group and a focal plane diameter of the imaging system is 0.5 mm to 1 mm, or a ratio between a difference between a focal plane diameter of the exit lens group and a focal plane diameter of the imaging system is 3% to 5%.

Optionally, in the above lighting structure, the collecting lens, the incident lens group and the exit lens group are all glass or quartz plates.

Optionally, in the above lighting structure, the light source is a halogen lamp, a xenon lamp or an LED lamp.

Optionally, in the above lighting structure, the number of the light sources is plural, and plural light sources are arranged together.

The utility model provides an illumination structure, which has the beneficial effects that:

Through set up a condensing lens in the rear side of light source, can gather together the light beam that sends backward to improve light efficiency and be convenient for formation of image, can effectively promote the light source utilization ratio of lighting structure. The front side of the light source is sequentially provided with an incident lens group, an emergent lens group and an imaging system, light rays emitted by the light source are emitted into the incident lens group, then are emitted into the emergent lens group by the incident lens group, and after being emitted from the emergent lens group, projection imaging is realized in the imaging system.

By means of the arrangement, the light source utilization rate of the lighting structure can be effectively improved under the condition that the brightness of the light source is not changed.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1-2 are schematic structural diagrams of an illumination structure according to an embodiment of the present utility model (fig. 2 shows diameter marks of parts).

In the upper graph:

101-a light source; 102-a condenser; 103-an incident lens group; 104-an exit lens group; a 105-imaging system;

d0-focal plane diameter of the condenser; d1-focal plane diameter of the incident lens group; d 2-focal plane diameter of the exit lens group; d 3-focal plane diameter of the imaging system.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The core of the utility model is to provide a lighting structure, which can effectively improve the light source utilization rate of the lighting structure under the condition of not changing the brightness of the light source.

In order to make the technical solution provided by the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings and specific embodiments.

Specifically, referring to fig. 1-2, an illumination structure provided by the present utility model includes: a condenser lens 102, a light source 101, an incident lens group 103, an exit lens group 104, and an imaging system 105 are installed in this order in the light path direction.

The condenser lens 102 is covered at one end of the incident lens group 103 facing the light source 101, and the light source 101 is arranged in the condenser lens 102.

The condenser lens 102 is used to collect the light beams emitted from the light source 101 to the rear side to increase the utilization ratio. In particular, the condensing lens 102 may be a concave spherical surface, and is mainly used for condensing light rays to improve light efficiency and facilitate imaging.

The light source 101 is configured to provide an illumination beam, and the illumination beam on the rear side of the light source 101 passes through the condenser lens 102 to form an outgoing beam and is converged at the incident end of the incident lens group 103.

The incident lens group 103 is used for transmitting the light of the light source 101 to the emergent lens group 104.

One end of the exit lens assembly 104 is used for receiving the light from the incident lens assembly 103, and the other end is used for projecting the light to the imaging system 105.

The imaging system 105 is configured to guide light, and is capable of receiving the light from the exit lens assembly 104 and transmitting the light to other devices. The specific configuration of the imaging system 105 may be adaptively selected according to the type of device. The imaging system 105 may be a diaphragm, such as when the device is a camera, and the imaging system 105 may be other structures when other functional devices are employed.

It should be noted that, the exit lens assembly 104 may be a lens assembly formed by one or more lenses. It may be formed by combining a plurality of convex lenses, a plurality of concave lenses, or at least one convex lens and at least one concave lens, as long as the incident lens group 103 can transmit most or all of the light source 101 to the exit lens group 104, and the exit lens group 104 can transmit most or all of the light from the incident lens group 103 to the imaging system 105.

The light source 101 approximates to a point light source 101, and the condenser lens 102 can reduce the loss of both sides light of the light source 101, thereby making the whole light of the light source 101 intensively operate. The incident lens group 103 is used for carrying out primary light transmission, the emergent lens group 104 is used for carrying out secondary light transmission, and the output light fully enters the imaging system 105 through the secondary light transmission, so that higher light utilization rate is obtained.

According to the illumination structure, the light beam emitted backwards can be gathered by arranging the condenser lens 102 at the rear side of the light source 101, so that the light efficiency is improved, imaging is facilitated, and the light source 101 utilization rate of the illumination structure can be effectively improved. An incident lens group 103, an emergent lens group 104 and an imaging system 105 are sequentially arranged on the front side of the light source 101, light rays emitted by the light source 101 are incident on the incident lens group 103, are emitted to the emergent lens group 104 by the incident lens group 103, and are emitted from the emergent lens group 104, and then projection imaging is realized in the imaging system 105.

By the arrangement, the utilization rate of the light source 101 of the illumination structure can be effectively improved under the condition that the brightness of the light source 101 is not changed.

In a specific embodiment, the collection optics 102, the light source 101, the entrance optics 103, the exit optics 104, and the imaging system 105 are coaxially arranged. The focal planes of the condenser lens 102, the light source 101, the incident lens group 103 and the exit lens group 104 are parallel. The structure is suitable for a straight-barrel type imaging illumination structure. The condenser lens 102, the incident lens group 103, the exit lens group 104 and the imaging system 105 may be attached end to end in this order, or may be provided with a certain gap (the positional relationship of each component is only shown in the figure without taking the middle pitch ratio of the figure as a basis). The specific value of the gap is not used as the protection key point of the scheme, and is not described herein.

In another embodiment, the collecting lens 102, the light source 101 and the incident lens group 103 are coaxially arranged, the emergent lens group 104 and the imaging system 105 are coaxially arranged, an included angle is formed between the incident lens group 103 and the emergent lens group 104, and a plane turning lens is arranged at the connecting end of the incident lens group 103 and the emergent lens group 104. Most or all of the light rays of the incident lens group 103 are transmitted to the emergent lens group 104 through the plane turning lens. The structure is suitable for a bending type imaging illumination structure with a certain included angle. The included angle can be adaptively selected according to actual needs.

In order to receive the light of the light source 101 into the incident mirror group 103 as completely as possible, the focal plane diameter d1 of the incident mirror group is designed to be equal to the focal plane diameter d0 of the condenser lens. Of course, in order to overcome the fitting deviation of the condenser lens 102 and the incident lens group 103 during the fitting process, the focal plane diameter d1 of the incident lens group is generally designed to be larger than the focal plane diameter d0 of the condenser lens.

Further, in view of the production cost and the structural volume, the focal plane diameter d1 of the incident lens group is designed to be slightly larger than the focal plane diameter d0 of the condenser lens. Specifically, the difference between the focal plane diameter d1 of the incident lens group and the focal plane diameter d0 of the condensing lens is 0.5 mm-1 mm, or the ratio of the difference between the focal plane diameter d1 of the incident lens group and the focal plane diameter d0 of the condensing lens to the focal plane diameter d0 of the condensing lens is 3% -5%.

Based on the above, the focal plane diameter d1 of the optimized incident lens group is equivalent to the focal plane diameter d0 of the condensing lens (simplified here, the focal plane diameter d0 of the actual condensing lens is the spot diameter of the condensing lens on the working focal plane of the incident lens group 103).

In order to transmit as much light as possible of the incident lens group 103 into the exit lens group 104, the focal plane diameter d2 of the exit lens group is equal to the focal plane diameter d3 of the imaging system. Of course, to overcome assembly variances created by the exit mirror assembly 104 and the imaging system 105 during assembly, the focal plane diameter d2 of the exit mirror assembly is typically greater than the focal plane diameter d3 of the imaging system.

Further, considering the production cost and the structural volume, the focal plane diameter d2 of the emergent lens group is slightly larger than the focal plane diameter d3 of the imaging system. Specifically, the difference between the focal plane diameter d2 of the exit lens group and the focal plane diameter d3 of the imaging system is 0.5 mm-1 mm, or the ratio of the difference between the focal plane diameter d2 of the exit lens group and the focal plane diameter d3 of the imaging system to the focal plane diameter d3 of the imaging system is 3% -5%.

The focal plane diameter d2 of the exit lens group is optimized to be substantially equal to the focal plane diameter d3 of the imaging system, so that the energy utilization of the light source 101 is optimized.

Regardless of the optical path loss (typically greater than 95%) the system increases the brightness of the light source 101 by about (d0×d0)/(d 3×d3). For example, d0=10mm, d3=3mm, and the brightness is improved by (10×10)/(3*3) ×11, so that the light source 101 utilization rate is effectively improved without changing the brightness of the halogen lamp, and the temperature obviously improved caused by simply improving the power of the halogen lamp is avoided.

The method has obvious improvement effect on LED lamps with low luminous efficiency (such as halogen lamps and xenon lamps) or limited power of the light source 101.

The scheme also comprises a lamp shade, wherein the condenser lens 102, the light source 101, the incident lens group 103, the emergent lens group 104 and the imaging system 105 are all arranged in the lamp shade.

In a specific embodiment, the collection mirror 102, the incident lens group 103, and the exit lens group 104 are all glass or quartz plates.

In a specific embodiment, the light source 101 is a halogen lamp, a xenon lamp, or an LED lamp. The LED lamp comprises an LED substrate and LED lamp beads arranged on the LED substrate, wherein the LED lamp beads are single-chip or multi-chip packaged LEDs.

Of course, the number of the light sources 101 may be one, or may be plural, and a plurality of the light sources 101 may be arranged together. For example, two halogen lamps are used as the light source 101 in each lighting structure, and when one halogen lamp is not operated, the other halogen lamp is still operated. The operation mode may be a simultaneous operation mode of a plurality of light sources 101 or an active mode.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, the plural means that more than two are used for distinguishing technical features if the first and second are described only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

As used in the specification and in the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The inclusion of an element defined by the phrase "comprising one … …" does not preclude the presence of additional identical elements in a process, method, article, or apparatus that comprises an element.

Wherein, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, in the description of the embodiments of the present application, "plurality" means two or more than two.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (10)

1. A lighting structure, comprising: the device comprises a condensing lens, a light source, an incident lens group, an emergent lens group and an imaging system;

The condensing lens is covered at one end of the incident lens group, which faces the light source, and the light source is arranged in the condensing lens;

the incident lens group is used for transmitting the light rays of the light source to the emergent lens group;

One end of the emergent lens group is used for receiving light rays from the incident lens group, and the other end of the emergent lens group is used for projecting the light rays to the imaging system;

the imaging system is used for guiding light.

2. The illumination structure of claim 1 wherein the collection optic, the light source, the entrance optic set, the exit optic set, and the imaging system are coaxially arranged.

3. The illumination structure according to claim 1, wherein the condenser lens, the light source and the incident lens group are coaxially arranged, the exit lens group and the imaging system are coaxially arranged, an included angle is formed between the incident lens group and the exit lens group, and a plane turning mirror is arranged at a connecting end of the incident lens group and the exit lens group.

4. The illumination structure of claim 1 wherein the focal plane diameter of the set of entrance mirrors is greater than or equal to the focal plane diameter of the collection mirrors.

5. The illumination structure of claim 4, wherein a difference between the focal plane diameter of the incident lens group and the focal plane diameter of the condenser lens is 0.5 mm to 1 mm, or a ratio of a difference between the focal plane diameter of the incident lens group and the focal plane diameter of the condenser lens to the focal plane diameter of the condenser lens is 3% to 5%.

6. The illumination structure of claim 1 wherein the focal plane diameter of the exit mirror group is greater than or equal to the focal plane diameter of the imaging system.

7. The illumination structure of claim 6, wherein the difference between the focal plane diameter of the exit mirror assembly and the focal plane diameter of the imaging system is 0.5 mm-1 mm, or the ratio of the difference between the focal plane diameter of the exit mirror assembly and the focal plane diameter of the imaging system to the focal plane diameter of the imaging system is 3% -5%.

8. The illumination structure according to claim 1, wherein the condenser lens, the incident lens group and the exit lens group are each glass or quartz plates.

9. A lighting structure as recited in claim 1, wherein the light source is a halogen lamp, a xenon lamp, or an LED lamp.

10. A lighting structure as recited in claim 9, wherein the number of said light sources is plural, and a plurality of said light sources are arranged together.