CN117469622A - Device for converting surface light source into parallel light source - Google Patents

Device for converting surface light source into parallel light source Download PDF

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Publication number
CN117469622A
CN117469622A CN202311526839.4A CN202311526839A CN117469622A CN 117469622 A CN117469622 A CN 117469622A CN 202311526839 A CN202311526839 A CN 202311526839A CN 117469622 A CN117469622 A CN 117469622A
Authority
CN
China
Prior art keywords
light source
lens
surface light
parallel
input lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311526839.4A
Other languages
Chinese (zh)
Inventor
周建锋
赵永基
陈玎羿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Xingfan Information Technology Co ltd
Changzhou Ailiban Technology Co ltd
Original Assignee
Ningbo Xingfan Information Technology Co ltd
Changzhou Ailiban Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Xingfan Information Technology Co ltd, Changzhou Ailiban Technology Co ltd filed Critical Ningbo Xingfan Information Technology Co ltd
Priority to CN202311526839.4A priority Critical patent/CN117469622A/en
Publication of CN117469622A publication Critical patent/CN117469622A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/048—Refractors for light sources of lens shape the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Abstract

The invention discloses a device for converting a surface light source into a parallel light source, which comprises: a surface light source; the input lens is used for converging divergent light rays emitted by the surface light source; the baffle is provided with a small hole, the small hole is positioned at the focus of the input lens, wherein the input lens focuses parallel rays in divergent rays emitted by the surface light source to the small hole and passes through the small hole; and an output lens for converting the light passing through the aperture into parallel light. The technical scheme can provide a parallel light source with low cost, long service life, uniform brightness and wide application.

Description

Device for converting surface light source into parallel light source
Technical Field
The disclosure relates to the field of optical technology, and in particular relates to a device for converting a surface light source into a parallel light source.
Background
The light source is a very important part of the machine vision system, the imaging effect is directly influenced by the selection of the light source, and a proper light source can provide stable and high-contrast images, so that the system is simpler to process the images. Parallel light, also called directional light (Directional Light), is a group of parallel light rays without attenuation, and has unique application modes in the technical fields of visual detection and image measuring instruments, so that the parallel light is extremely widely used.
In the related art, the parallel light source is generally composed of a point light source such as a metal-halogen lamp or a short-arc xenon lamp, and a parabolic reflector or an ellipsoidal reflector, and a condensing convex lens. The parallel light source can generate good parallel light, but has high cost, the service life of the point light sources is not long, the service life of the parallel light source is short, and besides, the brightness of the parallel light source is uneven due to uneven brightness of the point light sources, so that the parallel light source has great limitation in application.
Disclosure of Invention
In order to solve the problems in the related art, embodiments of the present disclosure provide an apparatus for converting a surface light source into a parallel light source.
In a first aspect, embodiments of the present disclosure provide an apparatus for converting a surface light source into a parallel light source.
Specifically, the device comprises:
a surface light source;
the input lens is used for converging divergent light rays emitted by the surface light source;
the baffle is provided with a small hole, the small hole is positioned at the focus of the input lens, wherein the input lens focuses parallel rays in divergent rays emitted by the surface light source to the small hole and passes through the small hole;
and an output lens for converting the light passing through the aperture into parallel light.
In one possible embodiment, the input lens and the output lens are both convex lenses,
in one possible embodiment, the focal points of the input lens and the output lens coincide.
In one possible embodiment, the surface light source, the input lens, the baffle plate, and the output lens are disposed in parallel.
In one possible embodiment, the apparatus further comprises:
a mirror for reflecting light passing through the aperture to the output lens;
the output lens is used for converting the light rays reflected by the reflecting mirror into parallel light.
In one possible embodiment, the axial direction of the output lens and the axial direction of the input lens form a predetermined angle.
In one possible embodiment, the predetermined angle is 90 degrees.
In one possible embodiment, the small holes have a diameter of 1mm to 3mm.
In one possible embodiment, the surface light source is an LED surface light source.
According to the technical scheme that this disclosed embodiment provided, the device includes area light source, input lens, baffle and output lens, will through input lens the parallel light focus in the divergent light of area light source transmission extremely the aperture department of baffle, from after the aperture department passes through, use output lens will follow the light that aperture department passed turns into parallel light, so use two convex lenses and a baffle of taking the aperture just can turn into parallel light source with the area light source, and is with low costs, and the life of area light source is longer, can increase parallel light source's life, and the luminance of area light source is even moreover, and the luminance of parallel light source who converts is also more even, can be applied to in the scene of more high accuracy.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
Other features, objects and advantages of the present disclosure will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 illustrates a schematic view of an apparatus for converting a surface light source into a parallel light source according to an embodiment of the present disclosure;
fig. 2 illustrates a schematic ray line diagram of an apparatus for converting a surface light source into a parallel light source according to an embodiment of the present disclosure;
FIG. 3 illustrates a schematic view of a reflective conversion apparatus at an angle according to an embodiment of the present disclosure;
FIG. 4 illustrates a schematic diagram of a reflective conversion apparatus at another angle in accordance with an embodiment of the present disclosure;
fig. 5 shows a schematic view of a reflective conversion device at yet another angle according to an embodiment of the present disclosure.
Detailed Description
Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. In addition, for the sake of clarity, portions irrelevant to description of the exemplary embodiments are omitted in the drawings.
In this disclosure, it should be understood that terms such as "comprises" or "comprising," etc., are intended to indicate the presence of features, numbers, steps, acts, components, portions, or combinations thereof disclosed in this specification, and are not intended to exclude the possibility that one or more other features, numbers, steps, acts, components, portions, or combinations thereof are present or added.
In addition, it should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As described above, in the related art, the parallel light source is generally composed of a point light source such as a metal-halogen lamp or a short-arc xenon lamp, and a parabolic reflector or an ellipsoidal reflector, and a condensing convex lens. The parallel light source can generate good parallel light, but has high cost, the service life of the point light sources is not long, the service life of the parallel light source is short, and besides, the brightness of the parallel light source is uneven due to uneven brightness of the point light sources, so that the parallel light source has great limitation in application.
The utility model provides a device with area source turn into parallel light source, this device is through two convex lenses and a baffle that has the hole with the divergent light conversion parallel light of area source emission, has solved current parallel light source with high costs, short service life, problem that the application is limited.
Fig. 1 illustrates a schematic view of an apparatus for converting a surface light source into a parallel light source according to an embodiment of the present disclosure. As shown in fig. 1, the device includes a surface light source 1, an input lens 2, a baffle 3, and an output lens 4.
Fig. 2 is a schematic view of a light ray line of an apparatus for converting a surface light source into a parallel light source according to an embodiment of the present disclosure, as shown in fig. 2, the surface light source 1 may emit light emission lines, the light emission lines include parallel light rays and non-parallel light rays (a dotted line output by the surface light source 1 in fig. 2), and an input lens 2 is used to collect the light emission lines emitted by the surface light source 1, where parallel light rays parallel to a main optical axis of the input lens 2 are collected by the input lens 2 to a focal point of the input lens 2, and non-parallel light rays are collected by the input lens 2 to a non-focal point. The baffle 3 is provided with a small hole 31, the small hole 31 is positioned at the focus of the input lens 2, and the distance between the baffle 3 and the input lens 2 is the focal length of the input lens 2; the parallel light rays in the divergent light rays emitted by the surface light source 1 are focused to a focus by the input lens 2, that is, the small hole 31 passes through the small hole 31, while the non-parallel light rays in the divergent light rays emitted by the surface light source 1 are converged to a non-focus by the input lens 2 and are blocked by the baffle 3. The light passing through the small hole 31 is further converged by the output lens 4, and the output lens 4 converts the light passing through the small hole 31 into parallel light for output.
In one possible implementation, the aperture of the input lens 2 and the aperture of the output lens 4 may be adjusted according to the brightness of the light in the actual scene, and the larger the aperture of the convex lens, the more luminous flux and the brighter the light.
The device provided in this embodiment includes a surface light source 1, an input lens 2, a baffle 3 and an output lens 4, wherein parallel light rays in divergent light rays emitted by the surface light source 1 are focused to a small hole 31 of the baffle 3 through the input lens 2, after passing through the small hole 31, the light rays passing through the small hole 31 are converted into parallel light rays by using the output lens 4, so that the surface light source 1 can be converted into parallel light sources by using two convex lenses and the baffle 3 with the small hole 31, the cost is low, the service life of the surface light source 1 is long, the service life of the parallel light sources can be prolonged, the brightness of the surface light source 1 is uniform, the brightness of the converted parallel light sources is uniform, and the device can be applied to more high-precision scenes.
In one possible embodiment, the input lens 2 and the output lens 4 are both convex lenses.
In a possible embodiment, the focal points of the input lens 2 and the output lens 4 coincide.
In this embodiment, since the light emitted from the focal point of the convex lens to the convex lens is converted into parallel light after passing through the convex lens, the output lens 4 needs to overlap the aperture 31 with the focal point of the output lens 4, that is, overlap the focal points of the input lens 2 and the output lens 4 so that the light passing through the aperture 31 can be converted into parallel light.
In one possible embodiment, as shown in fig. 1, the surface light source 1, the input lens 2, the baffle 3, and the output lens 4 are disposed in parallel. As shown in fig. 1, the surface light source 1, the input lens 2, the baffle 3 and the output lens 4 may be mounted on a mounting plate in order along an optical path to form a straight barrel type device, where a distance between the baffle 3 and the input lens 2 is a focal length of the input lens 2, and a distance between the baffle 3 and the output lens 4 is a focal length of the output lens 4.
In one possible implementation, to save device space, the straight barrel device shown in fig. 1 may be converted into a reflective device, and fig. 3-5 show three angles of schematic diagrams of the reflective conversion device according to an embodiment of the disclosure, and as shown in fig. 3-5, the device further includes a mirror 5, where the mirror 5 functions to reflect the light passing through the aperture 31 to the output lens 4, and the output lens 4 may convert the light reflected by the mirror 5 into parallel light, so that the output lens 4 may convert the light passing through the aperture 31 into parallel light by means of the mirror 5.
In a possible embodiment, the axial direction of the output lens 4 and the axial direction of the input lens 2 form a predetermined angle.
In this embodiment, in order to reduce the volume of the device, when the reflecting mirror 5 is used to reflect the light passing through the small hole 31 to the output lens 4, the output lens 4 and the input lens 2 may be disposed in non-parallel, the axial direction of the output lens 4 and the axial direction of the input lens 2 form a predetermined angle, as shown in fig. 3-5, the input lens 2 and the surface light source 1 and the baffle 3 may be disposed in parallel, and an angle is formed between the input lens 2 and the output lens 4, so that the device formed in this way has a more compact structure and a smaller volume.
In a possible implementation, the predetermined angle is 90 degrees, and at this time, the reflector may form an angle of 45 degrees with the axial direction of the output lens 4, and the reflector forms an angle of 45 degrees with the axial direction of the input lens 2; this allows for a smaller volume of the device.
In one possible embodiment, the aperture 31 has a diameter of 1mm to 3mm.
In one possible embodiment, the surface light source 1 may be an LED (Light Emitting Diode ) surface light source.
In this embodiment, the LED surface light source mainly includes LED lamp beads, a reflective sheet and a light guide sheet, and is low in cost, easy to obtain, energy-saving, long in service life, and capable of selecting the color, brightness and the like of the LED surface light source as required.
In other possible embodiments, a uniform surface light source may be achieved by performing diffuse reflection within a surface or special light guiding material.
By way of example, the present disclosure may provide two devices for converting a surface light source into a parallel light source:
1. straight cylinder type device:
as shown in fig. 1, the straight barrel type device includes: the surface light source 1, wherein the surface light source 1 is an LED surface light source; an input lens 2 for converging divergent light emitted from the surface light source 1; a baffle plate 3, wherein small holes (not shown in fig. 1) are arranged on the baffle plate 3, and the diameters of the small holes are 1-3 mm; the small hole is positioned at the focal point of the input lens 2, wherein the input lens 2 focuses parallel rays in divergent rays emitted by the surface light source 1 to the small hole 31 and passes through the small hole 31; an output lens 4 for converting light passing through the aperture 31 into parallel light; the input lens 2 and the output lens 4 are convex lenses, focuses of the input lens 2 and the output lens 4 coincide, and the surface light source 1, the input lens 2, the baffle 3 and the output lens 4 are arranged in parallel.
2. Reflective device:
as shown in fig. 3 to 5, the reflective device includes: the surface light source 1, wherein the surface light source 1 is an LED surface light source; an input lens 2 for converging divergent light emitted from the surface light source 1; the baffle plate 3 is provided with a small hole 31, and the diameter of the small hole 31 is 1 mm-3 mm; the small hole 31 is positioned at the focal point of the input lens 2, wherein the input lens 2 focuses parallel rays in divergent rays emitted by the surface light source 1 to the small hole 31 and passes through the small hole 31; a reflecting mirror 5 for reflecting the light passing through the aperture 31 to the output lens 4; the output lens 4 is configured to convert the light reflected by the reflecting mirror 5 into parallel light. The input lens 2 and the output lens 4 are convex lenses, and a preset included angle of 90 degrees is formed between the axial direction of the output lens 4 and the axial direction of the input lens 2.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the invention referred to in this disclosure is not limited to the specific combination of features described above, but encompasses other embodiments in which any combination of features described above or their equivalents is contemplated without departing from the inventive concepts described. Such as those described above, are mutually substituted with the technical features having similar functions disclosed in the present disclosure (but not limited thereto).

Claims (9)

1. An apparatus for converting a surface light source into a parallel light source, comprising:
a surface light source;
the input lens is used for converging divergent light rays emitted by the surface light source;
the baffle is provided with a small hole, the small hole is positioned at the focus of the input lens, wherein the input lens focuses parallel rays in divergent rays emitted by the surface light source to the small hole and passes through the small hole;
and an output lens for converting the light passing through the aperture into parallel light.
2. The apparatus of claim 1, wherein the input lens and the output lens are convex lenses.
3. The apparatus of claim 2, wherein the focal points of the input lens and the output lens coincide.
4. The device according to claim 2 or 3, wherein the surface light source, the input lens, the baffle, and the output lens are disposed in parallel.
5. The apparatus according to claim 1 or 2, characterized in that the apparatus further comprises:
a mirror for reflecting light passing through the aperture to the output lens;
the output lens is used for converting the light rays reflected by the reflecting mirror into parallel light.
6. The apparatus of claim 5, wherein the axial direction of the output lens and the axial direction of the input lens form a predetermined angle.
7. The apparatus of claim 6, wherein the predetermined included angle is 90 degrees.
8. The device of claim 1, wherein the aperture has a diameter of 1mm to 3mm.
9. The device of claim 1, wherein the surface light source is a light emitting diode, LED, surface light source.
CN202311526839.4A 2023-11-15 2023-11-15 Device for converting surface light source into parallel light source Pending CN117469622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311526839.4A CN117469622A (en) 2023-11-15 2023-11-15 Device for converting surface light source into parallel light source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311526839.4A CN117469622A (en) 2023-11-15 2023-11-15 Device for converting surface light source into parallel light source

Publications (1)

Publication Number Publication Date
CN117469622A true CN117469622A (en) 2024-01-30

Family

ID=89637778

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311526839.4A Pending CN117469622A (en) 2023-11-15 2023-11-15 Device for converting surface light source into parallel light source

Country Status (1)

Country Link
CN (1) CN117469622A (en)

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