CN117346105A - Linear light beam illumination device suitable for point light source and illumination adjusting method - Google Patents

Linear light beam illumination device suitable for point light source and illumination adjusting method Download PDF

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Publication number
CN117346105A
CN117346105A CN202311435749.4A CN202311435749A CN117346105A CN 117346105 A CN117346105 A CN 117346105A CN 202311435749 A CN202311435749 A CN 202311435749A CN 117346105 A CN117346105 A CN 117346105A
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CN
China
Prior art keywords
light source
axis parabolic
focusing lens
parabolic reflector
point light
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Pending
Application number
CN202311435749.4A
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Chinese (zh)
Inventor
孟浩然
崔旭
盛维伦
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Changchun Institute of Optics Fine Mechanics and Physics of CAS
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Changchun Institute of Optics Fine Mechanics and Physics of CAS
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Publication date
Application filed by Changchun Institute of Optics Fine Mechanics and Physics of CAS filed Critical Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority to CN202311435749.4A priority Critical patent/CN117346105A/en
Publication of CN117346105A publication Critical patent/CN117346105A/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
    • F21V7/00—Reflectors for light sources
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • 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
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • 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
    • F21Y2101/00—Point-like light sources

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention relates to the technical field of optics, in particular to a linear light beam illumination device suitable for a point light source and an illumination adjusting method. The line beam lighting device comprises a light source assembly, a reflecting assembly and a focusing assembly, wherein the light source assembly comprises a point light source, a basic light beam emitted by the point light source is divergent light, the basic light beam is converted into a collimated light beam after being reflected by an off-axis parabolic reflector, and the collimated light beam is focused into the line beam by a focusing lens. The technical scheme gets rid of the restriction of the visible spectrum band of the traditional LED lamp, and simultaneously, the problem that divergent light emitted by a point light source can not be converged into a linear light source by directly using a cylindrical lens is solved by utilizing the off-axis parabolic reflector, so that the collimation effect is obviously improved compared with that of the traditional planoconvex lens, the chromatic aberration problem generated by the lens can be avoided, and the required linear light source is obtained by using a focusing lens, so that the whole lighting device has stronger adaptability, good collimation effect, simple structure and low cost.

Description

Linear light beam illumination device suitable for point light source and illumination adjusting method
Technical Field
The invention relates to the technical field of optics, in particular to a linear light beam illumination device suitable for a point light source and an illumination adjusting method.
Background
When an image of an object is acquired, two acquisition methods of area array scanning and line scanning exist. The most common 2D machine vision systems use area scan cameras that require exposure of a complete pixel matrix when capturing images. In contrast, line scan cameras include a single row of pixels that build the final 2D image by pixel-line. Constructing a line scan image requires that relative motion be maintained between the camera and the object, as the object moves in front of the camera, the camera will acquire a new line of pixels, the image acquisition software will store each line of pixels, and then reconstruct the pixel data into a final 2D image.
This unique image acquisition process is good at acquiring images of rapidly moving discrete elements on a conveyor belt, detecting all sides of a cylindrical object, and constructing images of oversized objects. These attributes make line scan cameras ideal for capturing images of a target object in continuous or discrete "reel" surface detection applications, such as plastic, fabric, metal, or paper.
The line scan camera only needs one light ray when collecting a row of pixels, which means that unlike an area scan camera, the line scan camera does not need to uniformly illuminate the elements. Intense, non-fluctuating and highly focused line illumination is most suitable for line scanning applications, which also requires higher intensity light due to the faster acquisition speed (typically only a few microseconds per line).
At present, a large number of mature linear light source products are available on the market, and all the linear light source products are realized by adopting LED lamps, and the LED lamps have the excellent characteristics of high brightness and low power. However, the wavelength of the LED lamp is limited to the visible light range, and the requirements of some line scanning imaging systems requiring a wide-spectrum light beam cannot be met.
Disclosure of Invention
The invention provides a linear light beam lighting device and a lighting adjusting method suitable for a point light source, which solve the problem that the traditional linear light source product cannot generate linear light beams of wide-spectrum light beams.
In order to achieve the above object, in a first aspect, the present invention provides a line beam lighting device suitable for a point light source, including a light source assembly including a point light source for emitting a base beam including a broad spectrum beam, a reflection assembly, and a focusing assembly; the off-axis parabolic reflector is arranged on the propagation path of the basic light beam, and is used for collecting and reflecting the basic light beam and converting the reflected basic light beam into a collimated light beam; the focusing assembly comprises a focusing lens arranged at the emergent end of the off-axis parabolic reflector and used for focusing the collimated light beam into a linear light beam.
In some embodiments, the reflector assembly further comprises a planar reflector disposed in the propagation path of the base beam and between the point source and the off-axis parabolic reflector, the planar reflector for redirecting the base beam into the off-axis parabolic reflector.
In some embodiments, the light source assembly further includes a first light shield, the first light shield is provided with a first opening, the first light shield is sleeved outside the point light source, the base light beam is transmitted out of the first opening, and the first light shield is used for adjusting the aperture and/or the irradiation angle of the base light beam.
In some embodiments, the focusing assembly further comprises a second light shield, the focusing lens is disposed within the second light shield, the second light shield has a second opening disposed at the entrance face of the focusing lens and a third opening disposed at the exit face of the focusing lens; the collimated light beam is emitted into the focusing lens from the second opening, focused by the focusing lens and then transmitted out from the third opening.
In some embodiments, a base is included, the base having a first side and a second side disposed opposite each other, a point source and an off-axis parabolic mirror disposed on the base proximate the first side, and a planar mirror and a focusing optic disposed on the base proximate the second side.
In some embodiments, the reflector assembly further comprises a first mounting plate having a first mounting surface on which the off-axis parabolic mirror is disposed; the off-axis parabolic reflector is provided with a parabolic surface, the parabolic surface and the first installation surface are arranged at a first included angle, the off-axis parabolic reflector is also provided with a symmetrical surface, the parabolic surface is perpendicular to the symmetrical surface, and the symmetrical surface is parallel to the upper surface of the base.
In some embodiments, the focusing lens is in a columnar structure and extends vertically outward along the base, and the main axis surface of the focusing lens coincides with the main axis surface of the off-axis parabolic reflector.
In some embodiments, the point light source is a halogen lamp.
In a second aspect, the present invention further provides a line beam illumination adjustment method, which is applicable to the line beam illumination device in the first aspect, and the method includes:
adjusting the aperture of the base beam of the point light source;
adjusting the reflecting surface of the off-axis parabolic reflector so that the imaging of the point light source is positioned at the focus of the off-axis parabolic reflector;
the focusing lens is adjusted so that the main shaft surface of the focusing lens coincides with the main shaft surface of the off-axis parabolic reflector, the emergent surface of the focusing lens is perpendicular to the main shaft surface of the off-axis parabolic reflector, and emergent light of the focusing lens is converged on the focal surface of the focusing lens to form a linear light beam.
In some embodiments, the reflective assembly further comprises a planar mirror disposed in the propagation path of the base beam and between the point source and the off-axis parabolic mirror; adjusting the reflective surface of the off-axis parabolic reflector such that the imaging of the point source is positioned at the focal point of the off-axis parabolic reflector further comprises:
the reflective surface of the off-axis parabolic reflector is adjusted so that a virtual image of the point source in the planar reflector is positioned at the focal point of the off-axis parabolic reflector.
Compared with the prior art, the invention has the following beneficial effects:
the line beam lighting device comprises a light source assembly, a reflecting assembly and a focusing assembly, wherein the light source assembly comprises a point light source, a basic light beam emitted by the point light source is divergent light, the basic light beam is converted into a collimated light beam after being reflected by an off-axis parabolic reflector, and the collimated light beam is focused into the line beam by a focusing lens. The technical scheme gets rid of the restriction of the visible spectrum band of the traditional LED lamp, and simultaneously, the problem that divergent light emitted by a point light source can not be converged into a linear light source by directly using a cylindrical lens is solved by utilizing the off-axis parabolic reflector, so that the collimation effect is obviously improved compared with that of the traditional planoconvex lens, the chromatic aberration problem generated by the lens can be avoided, and the required linear light source is obtained by using a focusing lens, so that the whole lighting device has stronger adaptability, good collimation effect, simple structure and low cost.
Drawings
Fig. 1 is a schematic view of a line beam illumination device suitable for point light sources according to an embodiment of the present invention;
FIG. 2 is a schematic view of a light source assembly provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of an optical path of a linear beam illuminator suitable for point light sources according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a reflective assembly provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of a focusing assembly provided in accordance with an embodiment of the present invention;
fig. 6 is a step diagram of a lighting adjustment method provided according to an embodiment of the present invention.
Reference numerals:
1. a light source assembly; 11. a point light source; 12. a first shade; 121. a first opening; 2. a reflective assembly; 21. off-axis parabolic mirrors; 22. a planar mirror; 23. a first mounting plate; 3. a focusing assembly; 31. a focusing lens; 32. a second light shield; 321. a second opening; 4. a base; 41. a first side; 42. a second side.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, like modules are denoted by like reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, a detailed description thereof will not be repeated.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limiting the invention.
Referring to fig. 1 to 5, in a first aspect, the present embodiment provides a line beam lighting device suitable for a point light source 11, including a light source assembly 1, a reflection assembly 2 and a focusing assembly 3, wherein the light source assembly 1 includes the point light source 11, the point light source 11 is used for emitting a basic light beam, and the basic light beam includes a wide-spectrum light beam; the reflecting component 2 comprises an off-axis parabolic reflector 21, wherein the off-axis parabolic reflector 21 is arranged on the propagation path of the basic light beam, and the off-axis parabolic reflector 21 is used for collecting and reflecting the basic light beam and converting the reflected basic light beam into a collimated light beam; the focusing assembly 3 comprises a focusing optic 31 arranged at the exit end of the off-axis parabolic mirror 21 for focusing the collimated light beam into a line beam.
In this embodiment, the point light source 11 is a light source that emits light uniformly from one point to the surrounding space, and the basic beam emitted from the point light source 11 is divergent light, and cannot be converged into a linear light source by directly using a cylindrical lens. The off-axis parabolic mirror 21 is a surface mirror whose reflecting surface is a portion of a parent paraboloid taken in a plane. The parallel light beam or collimated point source 11 can be focused by an off-axis parabolic mirror 21, which off-axis design allows the focal point to be separated from the optical path. The use of off-axis parabolic mirror 21 does not produce spherical aberration, chromatic aberration, and does not introduce phase retardation and absorption loss compared to lenses. The off-axis parabolic mirror 21 is arranged in the propagation path of the base beam, which is converted into a collimated beam and reflected to the focusing assembly 3.
The focusing lens 31 is preferably a cylindrical prism, and in this embodiment, the focusing lens 31 is a plano-convex cylindrical lens. The collimated light beam can be focused into a linear light beam through the plano-convex cylindrical lens, and at the moment, an object to be observed or illuminated only needs to be placed at the focal plane of the linear light beam.
The embodiment gets rid of the restriction of the visible spectrum of the traditional LED lamp, and simultaneously, the off-axis parabolic reflector 21 is utilized to solve the problem that the divergent light emitted by the point light source 11 can not be converged into a linear light source by directly using a cylindrical lens, so that the collimation effect is obviously improved compared with that of the traditional plano-convex lens, the chromatic aberration problem generated by the lens can be avoided, and the required linear light source is obtained by using the focusing lens 31, so that the whole lighting device has stronger adaptability, good collimation effect, simple structure and low cost.
In some embodiments, the reflection assembly 2 further comprises a planar mirror 22, the planar mirror 22 being disposed in the propagation path of the base beam and between the point source 11 and the off-axis parabolic mirror 21, the planar mirror 22 being configured to redirect the base beam into the off-axis parabolic mirror 21.
In this embodiment, the plane mirror 22 is configured to turn the base beam, so as to reduce the occupied space of the whole lighting device. It should be noted that, the plurality of plane mirrors 22 may be provided to fold the basic beam for a plurality of times, and the positional relationship between the plurality of plane mirrors 22 may be adjusted according to the actual requirement, which is not described in detail in this embodiment.
In some embodiments, the light source assembly 1 further includes a first light shield 12, a first opening 121 is disposed on the first light shield 12, the first light shield 12 is sleeved outside the point light source 11, the base light beam is transmitted out from the first opening 121, and the first light shield 12 is used for adjusting an aperture and/or an irradiation angle of the base light beam.
In this embodiment, the first light-shielding cover 12 has a thin-shell structure, and a first opening 121 is disposed on the first light-shielding cover 12, and specifically, the first opening 121 can allow the light beam of the point light source 11 to pass through. In this embodiment, the light beam transmitted through the first opening 121 is denoted as the base light beam, and the light beam that diverges in other directions from the point light source 11 is blocked by the first light shield 12. Specifically, the first light shielding cover 12 may have a structure as shown in fig. 2, and the first opening 121 is disposed in the circumferential direction of the point light source 11, so that rotating the first light shielding cover 12 can adjust the angle of the first opening 121 relative to the center of the point light source 11, and further adjust the aperture size and/or the irradiation angle of the basic beam.
Referring to fig. 5, in some embodiments, the focusing assembly 3 further includes a second light shield 32, the focusing lens 31 is disposed in the second light shield 32, the second light shield 32 has a second opening 321 and a third opening, the second opening 321 is disposed on the incident surface of the focusing lens 31, and the third opening is disposed on the exit surface of the focusing lens 31; the collimated light beam enters the focusing lens 31 from the second opening 321, is focused by the focusing lens 31, and is transmitted out from the third opening.
In the present embodiment, the second light shielding cover 32 has a light shielding function, and at the same time, the second light shielding cover 32 can also be used for fixing the focusing lens 31. Specifically, the shape of the second light shield 32 is set corresponding to the shape of the focusing lens 31. The second light-shielding cover 32 has a second opening 321 and a third opening, the second opening 321 is disposed on the incident surface of the focusing lens 31, the size of the second opening 321 is the aperture size of the collimated light beam entering the focusing lens 31, and the third opening is disposed on the exit surface of the focusing lens 31, the size of the third opening is the beam exit aperture size of the line light beam formed after focusing.
In some embodiments, including a base 4, the base 4 has a first side 41 and a second side 42 disposed opposite to each other, the point light source 11 and the off-axis parabolic mirror 21 are disposed on the base 4 proximate to the first side 41, and the planar mirror 22 and the focusing optic 31 are disposed on the base 4 proximate to the second side 42.
In this embodiment, the base 4 is a component with a fixed mounting function, for convenience of description, two opposite sides of the base 4 are denoted as a first side 41 and a second side 42, the point light source 11 and the off-axis parabolic mirror 21 are disposed near the first side 41, the plane mirror 22 and the focusing lens 31 are disposed near the second side 42, that is, the basic beam of the point light source 11 sequentially passes through the plane mirror 22, the off-axis parabolic mirror 21 and the focusing lens 31 to form a linear beam, and in this process, the light path propagation path is as shown in fig. 3, so that the occupied space of the whole lighting device can be reduced.
In some embodiments, the reflector assembly 2 further comprises a first mounting plate 23, the first mounting plate 23 having a first mounting surface on which the off-axis parabolic reflector 21 is disposed; the off-axis parabolic reflector 21 has a parabolic surface, the parabolic surface is disposed at a first included angle with the first mounting surface, the off-axis parabolic reflector 21 further has a symmetrical surface, the parabolic surface is perpendicular to the symmetrical surface, and the symmetrical surface is parallel to the upper surface of the base 4.
In this embodiment, the first included angle is formed between the paraboloid and the first mounting surface, and as shown in fig. 4, the symmetry plane of the off-axis paraboloid reflector 21, that is, the reference plane where the symmetry line of the structure of the entire off-axis paraboloid reflector 21 is located, in this embodiment, the symmetry plane of the off-axis paraboloid reflector 21 is parallel to the upper surface of the base 4.
Referring to fig. 1 and 4, in some embodiments, the focusing lens 31 has a columnar structure and extends vertically outward along the base 4, and the main axis of the focusing lens 31 coincides with the main axis of the off-axis parabolic mirror 21.
In this embodiment, the focusing lens 31 has a cylindrical structure, specifically a cylindrical plano-convex prism structure, the convex surface is the incident surface of the focusing lens 31, and the plane is the emergent surface of the focusing lens 31. The main axis surface of the focusing lens 31 coincides with the main axis surface of the off-axis parabolic mirror 21. Specifically, the main axis surface of the off-axis parabolic reflector 21 refers to a plane perpendicular to the symmetry plane of the off-axis parabolic reflector 21 through the center of the fixed plane thereof; the main axis surface of the focusing lens 31 is a plane perpendicular to the mirror surface of the focusing lens 31 through the focal line thereof; the main shaft face, the symmetrical face and the focal face are mutually perpendicular.
In some embodiments, the point light source 11 is a halogen lamp.
Referring to fig. 6, in a second aspect, the present embodiment further provides a method for adjusting illumination of a line beam, which is applicable to the line beam illumination device of the first aspect, and the method includes:
s11, adjusting the aperture of a basic beam of the point light source;
s12, adjusting the reflecting surface of the off-axis parabolic reflector to enable the imaging of the point light source to be arranged at the focus of the off-axis parabolic reflector;
s13, adjusting the focusing lens so that the main shaft surface of the focusing lens coincides with the main shaft surface of the off-axis parabolic reflector, the emergent surface of the focusing lens is perpendicular to the main shaft surface of the off-axis parabolic reflector, and emergent light of the focusing lens is converged on the focal surface of the focusing lens to form a linear light beam.
In some embodiments, the reflective assembly further comprises a planar mirror disposed in the propagation path of the base beam and between the point source and the off-axis parabolic mirror; adjusting the reflective surface of the off-axis parabolic reflector such that the imaging of the point source is positioned at the focal point of the off-axis parabolic reflector further comprises:
the reflective surface of the off-axis parabolic reflector is adjusted so that a virtual image of the point source in the planar reflector is positioned at the focal point of the off-axis parabolic reflector.
In the above technical solution, the linear beam lighting device includes a light source assembly 1, a reflection assembly 2 and a focusing assembly 3, the light source assembly 1 includes a point light source 11, a basic beam emitted by the point light source 11 is divergent light, the basic beam is converted into a collimated beam after being reflected by an off-axis parabolic mirror 21, and the collimated beam is focused into a linear beam by a focusing lens 31. The technical scheme gets rid of the restriction of the visible spectrum of the traditional LED lamp, and simultaneously, the problem that the divergent light emitted by the point light source 11 can not be converged into a linear light source by directly using the cylindrical lens is solved by utilizing the off-axis parabolic reflector 21, so that the collimation effect is obviously improved compared with that of the traditional plano-convex lens, the chromatic aberration problem generated by the lens can be avoided, and the required linear light source is obtained by using the focusing lens 31, so that the whole lighting device has stronger adaptability, good collimation effect, simple structure and low cost.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present disclosure may be performed in parallel, sequentially, or in a different order, provided that the desired results of the technical solutions of the present disclosure are achieved, and are not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. A line beam illumination device suitable for use in point light sources, comprising:
the light source assembly comprises a point light source, wherein the point light source is used for emitting a basic light beam, and the basic light beam comprises a wide-spectrum light beam;
the off-axis parabolic reflector is arranged on the propagation path of the basic light beam, and is used for collecting and reflecting the basic light beam and converting the reflected basic light beam into a collimated light beam;
and the focusing assembly comprises a focusing lens which is arranged at the emergent end of the off-axis parabolic reflector and is used for focusing the collimated light beam into a linear light beam.
2. The line beam illumination device for point light sources of claim 1, wherein the reflection assembly further comprises:
and the plane reflector is arranged on the propagation path of the basic light beam and between the point light source and the off-axis parabolic reflector, and is used for refracting the basic light beam into the off-axis parabolic reflector.
3. The line beam illumination device for point light sources of claim 2, wherein the light source assembly further comprises:
the first light shield is provided with a first opening, the first light shield is sleeved outside the point light source, the basic light beam is transmitted out of the first opening, and the first light shield is used for adjusting the aperture and/or the irradiation angle of the basic light beam.
4. The line beam illumination device for point light sources of claim 3, wherein said focusing assembly further comprises:
the second light shield is arranged in the focusing lens, the second light shield is provided with a second opening and a third opening, the second opening is arranged on the incident surface of the focusing lens, and the third opening is arranged on the emergent surface of the focusing lens;
the collimated light beam is emitted into the focusing lens from the second opening, focused by the focusing lens and then emitted out from the third opening.
5. The line beam illumination device for point light sources according to claim 4, comprising:
the base is provided with a first side and a second side which are oppositely arranged, the point light source and the off-axis parabolic reflector are arranged on the base and are close to the first side, and the plane reflector and the focusing lens are arranged on the base and are close to the second side.
6. The line beam illumination device for point light sources of claim 5, wherein the reflector assembly further comprises a first mounting plate having a first mounting surface, the off-axis parabolic reflector being disposed on the first mounting surface;
the off-axis parabolic reflector is provided with a parabolic surface, the parabolic surface and the first installation surface are arranged at a first included angle, the off-axis parabolic reflector is also provided with a symmetrical surface, the parabolic surface is perpendicular to the symmetrical surface, and the symmetrical surface is parallel to the upper surface of the base.
7. The line beam illumination device for point light sources of claim 6, wherein the focusing lens has a columnar structure and extends vertically outward along the base, and a main axis surface of the focusing lens coincides with a main axis surface of the off-axis parabolic reflector.
8. The line beam lighting device of claim 1 adapted for point light sources, wherein the point light sources are halogen lamps.
9. A method of adjusting line beam illumination, suitable for use in a line beam illumination device as claimed in any one of claims 1 to 8, the method comprising:
adjusting an aperture of a base beam of the point light source;
adjusting the reflective surface of the off-axis parabolic reflector to place the image of the point light source at the focal point of the off-axis parabolic reflector;
and adjusting the focusing lens so that the main shaft surface of the focusing lens coincides with the main shaft surface of the off-axis parabolic reflector, the emergent surface of the focusing lens is perpendicular to the main shaft surface of the off-axis parabolic reflector, and emergent light of the focusing lens is converged on the focal surface of the focusing lens to form the line light beam.
10. The line beam illumination modulation method according to claim 9, wherein the reflection assembly further comprises a planar mirror disposed on the propagation path of the base beam and between the point light source and the off-axis parabolic mirror; adjusting the reflective surface of the off-axis parabolic reflector such that the imaging of the point source is positioned at the focal point of the off-axis parabolic reflector further comprises:
and adjusting the reflecting surface of the off-axis parabolic reflector so that a virtual image of the point light source in the plane reflector is positioned at the focus of the off-axis parabolic reflector.
CN202311435749.4A 2023-10-31 2023-10-31 Linear light beam illumination device suitable for point light source and illumination adjusting method Pending CN117346105A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311435749.4A CN117346105A (en) 2023-10-31 2023-10-31 Linear light beam illumination device suitable for point light source and illumination adjusting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311435749.4A CN117346105A (en) 2023-10-31 2023-10-31 Linear light beam illumination device suitable for point light source and illumination adjusting method

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Publication Number Publication Date
CN117346105A true CN117346105A (en) 2024-01-05

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