CN210568183U - Projection lamp system for oblique projection - Google Patents
Projection lamp system for oblique projection Download PDFInfo
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- CN210568183U CN210568183U CN201921768529.2U CN201921768529U CN210568183U CN 210568183 U CN210568183 U CN 210568183U CN 201921768529 U CN201921768529 U CN 201921768529U CN 210568183 U CN210568183 U CN 210568183U
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Abstract
The utility model provides a projecting lamp system for slope projection, including the light source, play plain noodles one side of light source is equipped with collimating lens, projection source and projection lens group in proper order, is equipped with the projection pattern in the projection source, and the both ends of projection pattern are far projection point and near projection point respectively, and the center of projection pattern and the optical axis collineation of projection lens group, and the distance of light source optical axis and far projection point is D, and the distance of light source optical axis and near projection point is D, and D < D. The utility model discloses the light energy distribution in the rational distribution projecting lamp system reduces the incident angle who gets into far projection point light to effectively improve the light energy that gets into far projection point, during the slope projection, keep away from the local facula luminance of projecting lamp system and be high enough, with the local facula basic phase of being close to projecting lamp system, the whole facula that projecting lamp system formed is clear, bright and each department luminance is even.
Description
Technical Field
The utility model relates to a projection lamp system specifically discloses a projection lamp system for slope projection.
Background
The projection technology is widely applied to the fields of image display, welcome illumination, stage illumination and the like, a traditional projection lamp system mainly comprises a projection source such as an LED (light emitting diode), a collimating lens, a film and the like and a projection unit lens group, an imaging light path of the traditional projection lamp system is shown in figure 1, and the functions of projection and illumination are realized through a lens group after light irradiated by a light source passes through the projection source to form shaped light.
The projection lamp can also be used outside the automobile body, and the projection lamp can be used as a welcome lamp or a Logo lamp when arranged on the side face of the automobile body, and part of the projection lamp is arranged in the front of and behind the automobile body and used as a warning reminder. When the projection lamp is inclined to the ground for projection, the problem of uneven projection light spot brightness exists, and the light spot brightness far away from the projection lamp is insufficient.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a projection lamp system for oblique projection, which can form a clear and bright projection spot during oblique projection.
For solving the prior art problem, the utility model discloses a projecting lamp system for slope projection, including the light source, play plain noodles one side of light source is equipped with collimating lens, projection source and projection lens group in proper order, is equipped with the projection pattern in the projection source, and the both ends of projection pattern are far projection point and near projection point respectively, and the center of projection pattern and projection lens group's optical axis collineation, and the distance of light source optical axis and far projection point is D, and the distance of light source optical axis and near projection point is D, and D < D.
Furthermore, at least one plane of the collimating lens is a non-rotation symmetrical plane.
further, the incidence angle projected to the far projection point by the collimating lens is α, α <10 °.
Further, the projection source is a film.
Furthermore, the projection lens group comprises a first convex lens, a concave lens and a second convex lens which are arranged in sequence, and the first convex lens is positioned on one side of the concave lens close to the projection source.
Further, the optical axes of the first convex lens, the concave lens and the second convex lens are collinear.
The utility model has the advantages that: the utility model discloses a projecting lamp system for slope projection, the light energy distribution in the rational distribution projecting lamp system reduces the incident angle who gets into far projection point light to effectively improve the light energy that gets into far projection point, during the slope projection, the facula luminance of keeping away from projecting lamp system place is enough high, and is equal basically with the facula that is close to projecting lamp system place, and the whole facula that projecting lamp system formed is clear, bright and each luminance is even.
Drawings
FIG. 1 is a schematic diagram of an imaging light path of a conventional projection lamp system.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic diagram of energy collection according to the present invention.
Fig. 4 is a schematic diagram of the imaging light path of the present invention.
Fig. 5 is a schematic structural diagram of oblique projection.
Fig. 6 is a distribution diagram of the projected spot illuminance of a conventional projection lamp system.
Fig. 7 is the projection light spot illuminance distribution diagram of the present invention.
The reference signs are: the projection lens comprises a light source 10, a collimating lens 20, a projection source 30, a projection pattern 31, a far projection point 311, a near projection point 312, a projection lens group 40, a first convex lens 41, a concave lens 42 and a second convex lens 43.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Refer to fig. 1 to 7.
the embodiment of the present invention discloses a projection lamp system for oblique projection, as shown in fig. 2, including a light source 10, a collimating lens 20, a projection source 30 and a projection lens group 40 are sequentially disposed on one side of a light exit surface of the light source 10, a projection pattern 31 is disposed in the projection source 30, two ends of the projection pattern 31 are a far projection point 311 and a near projection point β respectively, a projection light spot formed by the far projection point 311 is located at one end far from the projection lamp system, a projection light spot passing through the near projection point β is located at one end close to the projection lamp system, a center of the projection pattern 31 is collinear with an optical axis of the projection lens group 40, a center of the projection pattern 31 is located at a center of a connecting line between the far projection point 311 and the near projection point β, a connecting line between two side vertexes of the collimating lens 20 and the projection lens group 40 is not coaxial, a distance between the optical axis of the light source 10 and the far projection point 311 is D, a distance between the optical axis of the light source 10 and the near projection point β is D, D < D, that the optical axis of the light source 10 is close to the far projection point β, that the light spot is close to the far projection point 311, that the light spot is disposed close to the far projection point 311, an incident angle of the collimating lens 20 is α, an incident angle is larger angle than that a portion of the near projection point, a portion of the near projection light spot β, a portion of the projection light spot is larger incident angle, and a portion of the projection light spot is larger than a portion of the projection light spot, a portion of the.
As shown in fig. 5, in oblique projection, the inclination angle is θ, the height of the projection lamp system is h, the illumination is E, the light intensity is I, and the light intensity I satisfies the following formula:
when the height h is fixed, the illumination E of each position needing to be projected is equal, the light intensity I is inversely proportional to the inclination angle theta, and the larger the inclination angle theta is, namely the farther the projection distance is, the larger the required light intensity I is. The optical axis of the light source 10 is arranged close to the far projection point 311, so that the light energy at the far projection point 311 can be effectively improved, and the illumination distribution of the projection light spots at each position of final projection is uniform.
When inclination theta of projection lamp system was 45, when height h was 0.8m, the illuminance distribution diagram of traditional projection lamp was shown in fig. 6, the utility model discloses projection lamp system's illuminance distribution diagram is shown in fig. 7, and is visible the utility model discloses projection lamp system's illuminance distribution is even, can not have the defect that projection luminance in a distance is not enough.
The utility model discloses the light energy distribution in the rational distribution projecting lamp system reduces the incident angle who gets into far projection point light to effectively improve the light energy that gets into far projection point, during the slope projection, keep away from the local facula luminance of projecting lamp system and be high enough, with the local facula basic phase of being close to projecting lamp system, the whole facula that projecting lamp system formed is clear, bright and each department luminance is even.
In this embodiment, at least one plane of the collimating lens 20 is a non-rotational symmetry plane, and the non-rotational symmetry plane is configured to be capable of matching with the light source 10 deviating from the projection lens group 40 to achieve a high-efficiency light-gathering effect, so that most of the light can pass through the projection pattern 31 in the projection source 30, and the non-rotational symmetry plane of the collimating lens 20 can be expressed by multiple xy polynomials:
wherein z is the height value of the surface type, C vertex curvature, k is the conic coefficient, CjWhen the first-order differential of z is 0, only one solution is provided for ensuring that only one local maximum is provided and the surface shape is smooth.
in the present embodiment, the incident angle projected to the far projection point 311 via the collimator lens 20 is α, α <10 °.
in the embodiment, the projection source 30 is a film, the projection pattern 31 on the film is a light-transmitting pattern, and the angle of the chief ray collimated to reach each field of view on the projection pattern 31 is β, β ≈ 0 °.
In the present embodiment, the projection lens group 40 includes a first convex lens 41, a concave lens 42 and a second convex lens 43 arranged in this order, and the first convex lens 41 is located on the side of the concave lens 42 close to the projection source 30.
Based on the above embodiment, the optical axes of the first convex lens 41, the concave lens 42, and the second convex lens 43 are collinear.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The projection lamp system for oblique projection is characterized by comprising a light source (10), wherein a collimating lens (20), a projection source (30) and a projection lens group (40) are sequentially arranged on one side of a light emergent surface of the light source (10), a projection pattern (31) is arranged in the projection source (30), two ends of the projection pattern (31) are a far projection point (311) and a near projection point (312), the center of the projection pattern (31) is collinear with an optical axis of the projection lens group (40), the distance between the optical axis of the light source (10) and the far projection point (311) is D, the distance between the optical axis of the light source (10) and the near projection point (312) is D, and D is less than D.
2. A projection lamp system for oblique projection as claimed in claim 1, characterized in that at least one plane of the collimator lens (20) is a non-rotationally symmetrical plane.
3. a projection lamp system for oblique projection as claimed in claim 1 or 2, characterized in that the angle of incidence onto the far projection point (311) via the collimator lens (20) is α, α <10 °.
4. A projection lamp system for oblique projection as claimed in claim 1, characterized in that the projection source (30) is a film.
5. A projection lamp system for oblique projection as claimed in claim 1, characterized in that the projection lens group (40) comprises a first convex lens (41), a concave lens (42) and a second convex lens (43) arranged in this order, the first convex lens (41) being located on the side of the concave lens (42) adjacent to the projection source (30).
6. A projection lamp system for oblique projection as claimed in claim 5, characterized in that the optical axes of the first convex lens (41), the concave lens (42) and the second convex lens (43) are collinear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921768529.2U CN210568183U (en) | 2019-10-21 | 2019-10-21 | Projection lamp system for oblique projection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921768529.2U CN210568183U (en) | 2019-10-21 | 2019-10-21 | Projection lamp system for oblique projection |
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| CN210568183U true CN210568183U (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112073699A (en) * | 2019-06-11 | 2020-12-11 | 宁波舜宇车载光学技术有限公司 | Projection system and projection method thereof |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112073699A (en) * | 2019-06-11 | 2020-12-11 | 宁波舜宇车载光学技术有限公司 | Projection system and projection method thereof |
| CN112073699B (en) * | 2019-06-11 | 2022-07-29 | 宁波舜宇车载光学技术有限公司 | Projection system and projection method thereof |
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