CN212460297U - Night vision projector - Google Patents
Night vision projector Download PDFInfo
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- CN212460297U CN212460297U CN202021099795.3U CN202021099795U CN212460297U CN 212460297 U CN212460297 U CN 212460297U CN 202021099795 U CN202021099795 U CN 202021099795U CN 212460297 U CN212460297 U CN 212460297U
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- lens
- light beam
- night vision
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Abstract
The utility model discloses a night vision projector includes, infrared light source, first collimation lens and the optical lens that closes that arrange in proper order along the first direction, infrared light source is used for providing infrared light beam, infrared light beam process reachs behind the first collimation lens close optical lens. The beneficial effects of the utility model reside in that: 1. the infrared night vision function is realized, and the infrared night vision device can be applied to night vision operation; 2. the infrared light and visible light double-light-path projection display is realized, and the function is more comprehensive.
Description
Technical Field
The utility model relates to a projector field, especially, a night vision projector.
Background
At present, all laser projectors used in the market are visible light projectors, and the image content projected by the visible light projectors can be directly observed by naked eyes of users. In a night vision environment, a user wears night vision goggles and cannot directly observe the image content projected by the visible light projector, namely, the conventional laser projector cannot be applied to night vision operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that laser projector does not possess the night vision function, provides a neotype night vision projector.
In order to realize the purpose, the technical scheme of the utility model is as follows: a night vision projector comprises an infrared light source, a first collimating lens and a light combining lens which are sequentially arranged along a first direction, wherein the infrared light source is used for providing an infrared light beam, and the infrared light beam reaches the light combining lens after passing through the first collimating lens.
As a preferred scheme of the night vision projector, the night vision projector further comprises a blue laser, a second collimating lens, a splitting lens, a first focusing lens, a fluorescent wheel and a third collimating lens, which are sequentially arranged along a second direction, wherein the blue laser is used for providing a blue light beam, the blue light beam reaches the fluorescent wheel after passing through the second collimating lens, the splitting lens and the first focusing lens, and the fluorescent wheel is provided with a reflecting area and a transmitting area;
if the blue light beam reaches the reflection area, the blue light beam and the reflection area jointly generate a fluorescent light beam, the fluorescent light beam is emitted to the first focusing lens, and the fluorescent light beam reaches the light combining lens after passing through the first focusing lens and the light splitting lens;
if the blue light beam reaches the transmission area, the blue light beam reaches the light combining lens after passing through the transmission area and the third collimating lens and being reflected for multiple times by a group of reflectors, wherein the first direction is perpendicular to the second direction, and an included angle between the light splitting lens and the second direction is 45 degrees.
As a preferable scheme of the night vision projector, the light combining lens is used for combining the infrared light beam, the fluorescent light beam and the blue light beam and sending the combined light beam into the brightness homogenizing tube.
As a preferable scheme of the night vision projector, the wavelength of the infrared light beam is 740-808 nm.
As a preferable scheme of the night vision projector, the optical power of the infrared beam is greater than or equal to 3W.
Compared with the prior art, the utility model has the beneficial effects that 1, the utility model has the infrared night vision function and can be applied to night vision operation; 2. the infrared light and visible light double-light-path projection display is realized, and the function is more comprehensive.
In addition to the technical problems, technical features constituting technical aspects, and advantageous effects brought by the technical features of the technical aspects described above, other technical problems, technical features included in the technical aspects, and advantageous effects brought by the technical features solved by the present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, a night vision projector with infrared night vision function is shown.
The night vision projector comprises an infrared light source 1, a first collimating lens 2, a light combining lens 3, a blue laser 4, a second collimating lens 5, a light splitting lens 6, a first focusing lens 7, a fluorescent wheel 8, a third collimating lens 9 and the like.
The infrared light source 1, the first collimating lens 2 and the light combining lens 3 are sequentially arranged from top to bottom. The infrared light source 1 is used to provide an infrared light beam. The wavelength of the infrared light beam is 740-808 nm. The optical power of the infrared beam is greater than or equal to 3W. The infrared light beam passes through the first collimating lens 2 downwards and then reaches the light combining lens 3.
The blue laser 4, the second collimating lens 5, the beam splitting lens 6, the first focusing lens 7, the fluorescent wheel 8 and the third collimating lens 9 are arranged from left to right. The beam splitting lens 6 is obliquely arranged at 45 degrees. The blue laser 4 is used to provide a beam of blue light. The blue light beam passes through the second collimating lens 5, the beam splitting lens 6 and the first focusing lens 7 to the right and then reaches the fluorescent wheel 8.
The luminescent wheel 8 has a reflective region and a transmissive region. By rotating the fluorescent wheel 8, the blue light beam alternately reaches the reflective region and the transmissive region.
If the blue light beam reaches the reflection area, the blue light beam and the reflection area jointly generate a fluorescent light beam. The fluorescent light beam passes through the first focusing lens 7 and the beam splitting lens 6 leftwards and then reaches the light combining lens 3 downwards. The number of reflective regions may be 1, 2, or more. The phosphor of the reflective region may be green, red or yellow.
If the blue light beam reaches the transmission region, the blue light beam passes through the transmission region and the third collimating lens 9 rightwards, then passes through a group of reflectors for multiple reflection, and then reaches the light combining lens 3 downwards. In this embodiment, the number of the reflective mirrors is 3. As can be seen from the figure, the blue light beam after the third collimating lens 9 is reflected upward by a reflective mirror 10, then reflected leftward by a reflective mirror 11, and finally reflected downward by a reflective mirror 12 (which is located above the beam splitting mirror 6), and passes downward through the beam splitting mirror 6 to reach the beam combining lens 3. Relay lenses may be disposed between the mirrors.
The light combining lens 3 is used for combining the infrared light beam, the fluorescent light beam and the blue light beam and sending the combined light beams into an image brightness homogenizing pipe 13 at the lower end. After being homogenized by the image brightness homogenizing tube, the homogenized image enters the projector lens 14.
The above description is only intended to illustrate embodiments of the present invention, and the description is specific and detailed, but not to be construed as limiting the scope of the 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 (5)
1. A night vision projector is characterized by comprising an infrared light source, a first collimating lens and a light combining lens which are sequentially arranged along a first direction, wherein the infrared light source is used for providing an infrared light beam, and the infrared light beam reaches the light combining lens after passing through the first collimating lens.
2. The night vision projector as claimed in claim 1, further comprising a blue laser, a second collimating lens, a splitting lens, a first focusing lens, a fluorescent wheel and a third collimating lens arranged in sequence along a second direction, wherein the blue laser is configured to provide a blue light beam, the blue light beam passes through the second collimating lens, the splitting lens and the first focusing lens and then reaches the fluorescent wheel, and the fluorescent wheel has a reflective area and a transmissive area;
if the blue light beam reaches the reflection area, the blue light beam and the reflection area jointly generate a fluorescent light beam, the fluorescent light beam is emitted to the first focusing lens, and the fluorescent light beam reaches the light combining lens after passing through the first focusing lens and the light splitting lens;
if the blue light beam reaches the transmission area, the blue light beam reaches the light combining lens after passing through the transmission area and the third collimating lens and being reflected for multiple times by a group of reflectors, wherein the first direction is perpendicular to the second direction, and an included angle between the light splitting lens and the second direction is 45 degrees.
3. The night vision projector as claimed in claim 2, wherein the light combining lens is used to combine the infrared light beam, the fluorescent light beam and the blue light beam into a brightness homogenizing tube.
4. A night vision projector as claimed in any one of claims 1 to 3, wherein the wavelength of the infrared beam is 740 and 808 nm.
5. A night vision projector as claimed in any one of claims 1 to 3, characterized in that the optical power of the infrared beam is greater than or equal to 3W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021099795.3U CN212460297U (en) | 2020-06-15 | 2020-06-15 | Night vision projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021099795.3U CN212460297U (en) | 2020-06-15 | 2020-06-15 | Night vision projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212460297U true CN212460297U (en) | 2021-02-02 |
Family
ID=74470422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021099795.3U Active CN212460297U (en) | 2020-06-15 | 2020-06-15 | Night vision projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212460297U (en) |
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2020
- 2020-06-15 CN CN202021099795.3U patent/CN212460297U/en active Active
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