CN216870943U - Optical system based on micro-lens array element - Google Patents
Optical system based on micro-lens array element Download PDFInfo
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- CN216870943U CN216870943U CN202123217440.7U CN202123217440U CN216870943U CN 216870943 U CN216870943 U CN 216870943U CN 202123217440 U CN202123217440 U CN 202123217440U CN 216870943 U CN216870943 U CN 216870943U
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Abstract
The utility model discloses an optical system based on a micro-lens array element, which comprises an irradiation light source, an optical array element I and an optical array element II which are arranged in sequence, wherein light rays emitted by the irradiation light source pass through the optical array element I and then irradiate the optical array element II, wherein: the first optical array element comprises n micro lenses, the second optical array element comprises m micro lenses, m and n are positive integers, and the first optical array element and the second optical array element are arranged in a 1-dimensional or 2-dimensional mode. The utility model realizes a high-integration and miniaturized special illumination and imaging system because the micro-lens array element has the characteristics of flexible and controllable size, focal length, displacement mode, quantity and the like, and the whole system structure is more modularized and more convenient and flexible to use.
Description
The technical field is as follows:
the utility model relates to the technical field of optical processing, in particular to an optical system based on a micro-lens array element.
Background art:
the miniature projection lighting and miniature imaging equipment is basic equipment for analyzing and measuring lighting design, projection image display and special light field projection by applying optical technology, electronic technology and computer control technology, and is widely applied to the fields of machine vision, environment monitoring, industrial control, special lighting and the like.
Because the traditional projection and imaging equipment generally has the defects of complex structure, limited use environment, inconvenience in carrying, high price and the like, the requirements in the fields of integrated systems and miniaturized systems cannot be met. Therefore, miniaturization, low cost, portable miniature projection systems, imaging systems have become an important direction of research.
In recent years, based on the development of micro-optical element design, micro-optical element processing technology and production technology, the technology and products in the fields of industry, scientific research and civil products are rapidly developed, and urgent, low-cost, targeted and customized demands are made on micro projection illumination, imaging optical systems and the like in each product field.
The utility model has the following contents:
the present invention is directed to an optical system based on microlens array elements to overcome the deficiencies of the prior art.
The utility model is implemented by the following technical scheme: an optical system based on a micro-lens array element comprises an irradiation light source, a first optical array element and a second optical array element which are sequentially arranged in front and back, wherein light rays emitted by the irradiation light source penetrate through the first optical array element and then irradiate the second optical array element, wherein: the first optical array element comprises n micro lenses, the second optical array element comprises m micro lenses, m and n are positive integers, and the first optical array element and the second optical array element are arranged in a 1-dimensional or 2-dimensional mode.
Preferably, the first optical array element and the second optical array element are arranged in a standard array mode with equal interval, equal size and equal rise or in a non-periodic mode with variable interval, variable size and variable rise.
Preferably, the microlenses of the first optical array element and the second optical array element are equal focal length variable focal length microlens arrays or unequal focal length variable focal length microlens arrays.
Preferably, the first optical array element and the second optical array element are two separate elements.
Preferably, the first optical array element and the second optical array element are arranged on the upper surface and the lower surface of the same substrate, so that a single double-sided micro-lens array element is realized.
Preferably, the illumination light source is a visible light source or an invisible light source,
preferably, the illumination light source is an LED light source, an LED light source array, or a combination of a light emitting device and a spatial light modulator.
Preferably, the microlenses constituting the first optical array element and the second optical array element are concave lenses, or convex lenses, or any combination of concave lenses and convex lenses, or irregular lenses with any free curvature.
Preferably, the first optical array element and the second optical array element are made of the same light-transmitting medium material or different light-transmitting medium materials.
The utility model has the advantages that:
the utility model realizes a high-integration and miniaturized special illumination and imaging system because the micro-lens array element has the characteristics of flexible and controllable size, focal length, displacement mode, quantity and the like, and the whole system structure is more modularized and more convenient and flexible to use.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an overall structure of an optical system based on a micro-lens array element according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an optical system based on microlens array elements, including only one optical array element, according to an embodiment of the present invention;
fig. 3 is a schematic two-dimensional structure diagram of an optical array element i of an optical system based on a microlens array element according to an embodiment of the present invention.
Fig. 4 is a one-dimensional structural diagram of a first optical array element of an optical system based on a microlens array element according to an embodiment of the present invention.
Fig. 5 is a schematic two-dimensional structure diagram of a second optical array element of an optical system based on a microlens array element according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a one-dimensional structure of a second optical array element of an optical system based on a microlens array element according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an operating principle of an optical system based on a microlens array element according to an embodiment of the present invention.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 to 7, an optical system based on a microlens array element includes an irradiation light source, a first optical array element, and a second optical array element, which are sequentially disposed in front of and behind each other, and light emitted from the irradiation light source passes through the first optical array element and then irradiates the second optical array element, wherein: the first optical array element includes N microlenses, the second optical array element includes M microlenses, M and N are positive integers, and of course, M is equal to 1 or N is equal to 1 in M, N. And the first optical array element and the second optical array element are arranged in a 1-dimensional mode or a 2-dimensional mode.
In this embodiment, the first optical array element and the second optical array element are arranged in a standard array manner with equal spacing, equal size and equal rise, or in a non-periodic manner with variable spacing, variable size and variable rise.
In this embodiment, the microlenses of the first optical array element and the second optical array element are equal-focal-length variable-focal-length microlens arrays or unequal-focal-length variable-focal-length microlens arrays.
In this embodiment, the first optical array element and the second optical array element are two split elements.
In this embodiment, the first optical array element and the second optical array element are formed on the upper surface and the lower surface of the same substrate, so that a single double-sided microlens array element is realized.
In this embodiment, the illumination source is a visible light source or an invisible light source,
in this embodiment, the illumination source is an LED light source, an LED light source array, or a combination of a light emitting device and a spatial light modulator.
In this embodiment, the microlenses constituting the first optical array element and the second optical array element are concave lenses, or convex lenses, or any combination of concave lenses and convex lenses, or irregular lenses with any free curvature.
In this embodiment, the first optical array element and the second optical array element are made of the same transparent medium material or different transparent medium materials.
Example 2
The utility model also provides an optical processing method of the optical system based on the micro-lens array element, which comprises the following steps:
in step 1, the light emitted by the irradiation light source is processed by n microlenses L11 and L12 … … L1n of the first optical array element to generate n virtual images I11 and I12 … … I1n respectively,
the corresponding image distances are:
V1n＝D*f1n/(D-f1n)； (1)
the corresponding magnification is α: α 1n ═ f1n/(D-f1 n); (2)
wherein D is the distance from the irradiation light source to the first optical array element, and the focal lengths of the n microlenses L11 and L12 … … L1n of the first optical array element are f11 and f12 … … f1n, respectively;
step 2, the light from the irradiation light source passes through the first optical array element and then irradiates the second optical array element, and the light emitted by the n virtual images I11 and I12 … … I1n of the first optical array element irradiates the second optical array element and is secondarily imaged by the second optical array element, wherein:
the object distances from the n virtual images of the first optical array element to the second optical array element are respectively as follows:
U2n＝V1n+L (3)
wherein L is the distance from the first optical array element to the second optical array element;
the image distance of the second imaging of the optical array element two is as follows:
V2nm＝F(U2n,f2m)
＝U2n*f2m/(U2n-f2m)
＝(V1n+L)*f2m/(V1n+L-f2m) (4)
the second optical array element comprises m microlenses L21 and L22 … … L2m, and the corresponding focal lengths are f21 and f22 … … f2m respectively;
the corresponding magnification of the second imaging of the optical array element two is as follows:
α2nm＝f2m/(V1n+L-f2m) (5)
and 3, performing secondary microlens array imaging processing on the light rays emitted by the light source by adjusting the distance D from the irradiation light source to the first optical array element, the distance L from the first optical array element to the second optical array element, the number n of microlenses of the first optical array element, the number m of microlenses of the second optical array element, the focal length f1n of the n microlenses of the first optical array element and the focal length f2m of the m microlenses of the second optical array element, and realizing the final image distance V2nm and the magnification alpha 2 nm.
The utility model realizes a high-integration and miniaturized special illumination and imaging system because the micro-lens array element has the characteristics of flexible and controllable size, focal length, displacement mode, quantity and the like, and the whole system structure is more modularized and more convenient and flexible to use.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. An optical system based on a micro-lens array element is characterized by comprising an irradiation light source, an optical array element I and an optical array element II which are arranged in sequence, wherein light rays emitted by the irradiation light source pass through the optical array element I and then irradiate the optical array element II, wherein: the first optical array element comprises n microlenses, the second optical array element comprises m microlenses, m and n are positive integers, the first optical array element and the second optical array element are arranged in a 1-dimensional mode or a 2-dimensional mode, the first optical array element and the second optical array element are arranged in a standard array mode with equal intervals, equal sizes and equal rise or in a non-periodic mode with variable intervals, variable sizes and variable rise, and each microlens of the first optical array element and the second optical array element is a microlens array with equal focal length and variable focal length or a microlens array with different focal length and variable focal length.
2. The optical system as claimed in claim 1, wherein the first optical array element and the second optical array element are two separate elements.
3. The optical system as claimed in claim 1, wherein the first optical array element and the second optical array element are formed on the upper and lower surfaces of the same substrate, so as to realize a single double-sided microlens array element.
4. A microlens array element based optical system as claimed in claim 1, wherein the illumination source is either a visible light source or an invisible light source.
5. A microlens array element based optical system as in claim 4, wherein the illumination source is an LED light source, an array of LED light sources, or a combination of a light emitting device and a spatial light modulator.
6. A microlens array element-based optical system as claimed in claim 1, wherein the microlenses constituting the first optical array element and the second optical array element are concave lenses, or convex lenses, or any combination of concave lenses and convex lenses, or irregular lenses with any free curvature.
7. The optical system as claimed in claim 1, wherein the first optical array element and the second optical array element are made of the same transparent medium material or different transparent medium materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123217440.7U CN216870943U (en) | 2021-12-21 | 2021-12-21 | Optical system based on micro-lens array element |
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| CN202123217440.7U CN216870943U (en) | 2021-12-21 | 2021-12-21 | Optical system based on micro-lens array element |
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