Infrared laser

Abstract

The utility model relates to the technical field of laser projection, in particular to an infrared laser, which comprises a laser light source, a collimating lens, an optical diffracting mirror and a casing, the casing is rectangular, two groove-shaped notches are symmetrically arranged on the lateral sides of the tail of the casing, a rotating shaft is convenient to mount, and the laser can be rotated through the rotating shaft. The pitch angle of the laser sector is adjusted; when the laser is fixed according to the reference surface, the sector of laser output by the laser can be parallel to the top of the laser. The center of the optical diffraction mirror is biased at the center of the diaphragm of the infrared laser diode to form a non-center-to-center installation mode, a laser refraction field angle can be adjusted, the optical diffraction mirror which is in a circular truncated cone shape and of which the top is in a concave conical shape is matched to form a fan-shaped light curtain parallel to the top of the laser, and the use efficiency of laser can be greatly improved. Compared with the prior art, the device cost and the technical complexity are reduced.

Description

Technical Field

[0001] This utility model relates to the field of laser projection technology, and specifically discloses an infrared laser. Background Technology

[0002] Traditional lasers typically use optical elements such as galvanometers or prisms to deflect the laser beam to form a projected image. However, this method has the following drawbacks: complex optical path requiring multiple optical elements, leading to a complex optical path and difficulty in miniaturizing the device; low laser utilization, as some laser energy is lost during deflection, resulting in reduced laser utilization; and difficulty in achieving large-angle projection, as the deflection angle of the optical elements limits the ability to achieve projections larger than 170°. Furthermore, the unutilized laser beam carries a significant amount of heat, increasing the laser's heat generation and shortening its lifespan. Therefore, it is necessary to provide a new type of laser. Utility Model Content

[0003] This invention provides an infrared laser with the feature of a large-angle laser light curtain, which solves the problem of low laser beam utilization in existing technologies.

[0004] This utility model provides the following technical solution: a red laser, comprising: a laser source, a collimating lens, an optical diffractometer, and a housing; the laser source is fixed inside the housing, and a driving module is provided at the tail of the laser source. The laser source and the driving module are connected by a circuit. The front end of the laser source is a collimating lens, and the front end of the collimating lens is an optical diffractometer. The optical diffractometer is a frustum-shaped lens, and the top of the frustum is a concave cone shape. The center of the cone of the optical diffractometer is not collinear with the center of the laser emitted from the laser source. The housing is cuboid in shape, and two symmetrical slotted notches are provided on the side of the tail of the housing. A rotating shaft is installed in the slotted notches.

[0005] Furthermore, the laser source is an infrared laser diode, and an aperture is installed at the front end of the infrared laser diode.

[0006] Furthermore, the collimating lens is a plano-convex lens, and the center of the plano-convex lens surface is collinear with the center of the aperture stop and the center of the infrared laser diode.

[0007] Furthermore, the front end of the outer shell is provided with a light shield, which is a hollow cylinder with at least 1 / 2 of the continuous arc surface removed from the side of the hollow cylinder, and the optical diffractometer is installed inside the light shield.

[0008] Due to the adoption of the above technical solution, this utility model has the following beneficial effects:

[0009] This invention employs a rectangular outer shell with two symmetrical slotted notches on the rear side to facilitate the installation of a rotating shaft. The shaft allows rotation of the laser to adjust the pitch angle of the laser beam. The side of the rectangular shell can serve as a reference plane; when the laser is fixed to this reference plane, the laser beam output is parallel to the top of the laser. By offsetting the center of the optical diffractometer to the center of the infrared laser diode's aperture, a non-center-to-center mounting method is achieved, allowing adjustment of the laser refraction angle to form a fan-shaped light curtain parallel to the top of the laser. The fan angle is between 170° and 180°, significantly improving laser efficiency. Compared to existing technologies that use multiple lasers arranged at different angles to form a near-180° light curtain, this invention reduces component costs and technical complexity. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings:

[0011] Figure 1 This is a schematic diagram of the present invention;

[0012] Figure 2 This is a partial structural cross-sectional view of the present utility model;

[0013] Figure 3 This is an optical diagram of the infrared laser irradiation optical diffractometer of this utility model;

[0014] Figure 4 This is a schematic diagram of the optical diffraction mirror light curtain of this utility model.

[0015] In the diagram: 1-Laser source; 11-Drive module; 12-Aperture; 2-Collating lens; 3-Optical diffractometer; 4-Housing shell; 41-Groove notch; 42-Rotating shaft; 43-Light shield. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0017] Example 1:

[0018] Please see Figure 1 and Figure 2A red laser includes: a laser source 1, a collimating lens 2, an optical diffractometer 3, and a housing 4; the laser source 1 is fixed inside the housing 4, and a driving module 11 is provided at the tail of the laser source 1. The laser source 1 and the driving module 11 are connected by a circuit. The front end of the laser source 1 is the collimating lens 2, and the front end of the collimating lens 2 is the optical diffractometer 3; the optical diffractometer 3 is a frustum-shaped lens, and the top of the frustum is a concave cone shape. The center of the cone of the optical diffractometer 3 is not collinear with the center of the laser emitted from the laser source 1. The housing 4 is cuboid in shape, and two groove-shaped notches 41 are symmetrically provided on the side of the tail of the housing 4. A rotating shaft 42 is installed in the groove-shaped notches 41.

[0019] It should be further noted that the laser source 1 is an infrared laser diode, and an aperture 12 is installed at the front end of the infrared laser diode.

[0020] It should be further explained that the collimating lens 2 is a plano-convex lens, and the center of the plano-convex lens surface is collinear with the center of the aperture stop 12 and the center of the infrared laser diode.

[0021] It should be further explained that the front end of the outer shell 4 is provided with a light shield 43, which is a hollow cylinder. The side of the hollow cylinder has a continuous arc surface of not less than 1 / 2 removed, and the optical diffractometer 3 is installed inside the light shield 43.

[0022] In this embodiment, a rectangular outer shell 4 is used, and two groove-shaped notches 41 are symmetrically provided on the side of the tail of the outer shell 4 to facilitate the installation of the rotating shaft 42. The laser can be rotated through the rotating shaft 42 to adjust the pitch angle of the laser fan. In addition, the side of the rectangular outer shell 4 can be used as a reference plane. When the laser is fixed according to the reference plane, the fan of the laser output by the laser can be parallel to the top of the laser, which facilitates the installation of the laser.

[0023] Please see Figure 3 and Figure 4 In this embodiment, by offsetting the center of the optical diffractor 3 to the center of the aperture 12 of the infrared laser diode, a non-center-to-center mounting method is formed, which can adjust the laser refraction angle and form a fan-shaped light curtain parallel to the top of the laser, with a fan angle between 170° and 180°, which greatly improves the efficiency of laser use.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In the description of this utility model, the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present utility model described can be implemented in orders other than those illustrated or described herein.

[0027] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or maintenance tool that includes a series of steps or units, not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or maintenance tool.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that, without departing from the structure of this utility model, several modifications and improvements can be made, and these should also be considered within the protection scope of this utility model. These will not affect the implementation effect of this utility model or the utility model of the patent.

Claims

1. An infrared laser, comprising: The laser source (1), collimating lens (2), optical diffractometer (3), and housing (4) are provided. The laser source (1) is fixed inside the housing (4). A driving module (11) is provided at the tail of the laser source (1). The laser source (1) and the driving module (11) are connected by a circuit. The front end of the laser source (1) is a collimating lens (2). The front end of the collimating lens (2) is an optical diffractometer (3). The optical diffractometer (3) is a frustum-shaped lens. The top of the frustum is a concave cone shape. The center of the cone of the optical diffractometer (3) is not collinear with the center of the laser emitted by the laser source (1). The housing (4) is a cuboid. Two groove-shaped notches (41) are symmetrically provided on the side of the tail of the housing (4). A rotating shaft (42) is installed in the groove-shaped notches (41).

2. The infrared laser according to claim 1, characterized in that: The laser source (1) is an infrared laser diode, and an aperture (12) is installed at the front end of the infrared laser diode.

3. The infrared laser according to claim 2, characterized in that: The collimating lens (2) is a plano-convex lens, and the center of the plano-convex lens surface is collinear with the center of the aperture stop (12) and the center of the infrared laser diode.

4. The infrared laser according to claim 1, characterized in that: The front end of the outer shell (4) is provided with a light shield (43), which is a hollow cylinder. The side of the hollow cylinder has a continuous arc surface of not less than 1 / 2 removed, and the optical diffractometer (3) is installed inside the light shield (43).

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