Light spot homogenizing device of laser in holder dome camera shield

Abstract

The utility model relates to a light spot homogenizing device of a laser in a holder dome camera shield, which comprises the laser, an electromagnet and a metal reed, the laser is connected with an optical fiber, the optical fiber is connected with the metal reed, one end of the metal reed is fixed, and the other end of the metal reed is close to the electromagnet. According to the utility model, the optical fiber can be continuously and circularly vibrated, the light spot homogenization effect of the laser is obviously improved, the speckle problem of the laser is solved, and the optical fiber cannot be pulled.

Description

Technical Field

[0001] The utility model relates to a light spot homogenizing device for a laser in a protective cover of a pan / tilt camera, belonging to the field of monitoring pan / tilt cameras. Background Art

[0002] Currently, most PTZ cameras use lasers for auxiliary lighting, particularly for nighttime surveillance. Lasers enable PTZ cameras to monitor farther and wider areas. Lasers typically use fiber-optically pigtailed semiconductor lasers, but the beam quality of these lasers exhibits severe speckle, resulting in speckled images when used by camera systems. Research has shown that vibrating devices can improve speckle and even out the light. However, the vibrations in existing fiber-optic vibrating devices can cause premature fatigue and even breakage of the optical fiber due to multi-directional pulling and twisting. Summary of the Invention

[0003] The purpose of the utility model is to provide a laser spot homogenizing device in a pan-tilt camera cover that can sustainably perform cyclic vibration on an optical fiber, significantly improve the laser spot homogenizing effect, solve the laser speckle problem, and will not pull the optical fiber line.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a spot homogenizing device for a laser in a protective cover of a pan-tilt ball machine, comprising a laser, an electromagnet and a metal reed, an optical fiber connected to the laser, the optical fiber being connected to the metal reed, one end of the metal reed being fixed and the other end being close to the electromagnet.

[0005] Preferably, the device further comprises an upper fixing plate fixed to the lower body, wherein the laser is fixed in the lower body, and the upper fixing plate is fixed to the lower body via fixing columns, with a mounting gap provided between the upper fixing plate and the lower body. The lower body is used to mount the laser, while the upper fixing plate is used to mount the electromagnet, which is mounted between the lower body and the upper fixing plate, forming a well-assembled whole.

[0006] Preferably, the electromagnet has two pieces, one of which is fixed to the upper fixing plate and the other is fixed to the lower body, and the other end of the metal reed passes through the gap between the two electromagnets. The two electromagnets can make the metal reed vibrate more frequently, thereby improving the vibration of the optical fiber.

[0007] Preferably, one end of the metal spring is fixedly connected between the upper fixing plate and the lower body through a rear fixing column. One end of the metal spring is firmly fixed.

[0008] Preferably, the upper fixing plate and the lower body are provided with relative limiting protrusions, which can limit the vibration amplitude of the metal spring so that the vibration amplitude of the optical fiber will not be too large.

[0009] Preferably, the optical fiber is wound around the metal reed and overlapped with the metal reed. After the optical fiber is wound, the metal reed will inevitably drive the optical fiber to vibrate.

[0010] With this structure, the metal reed deforms toward the electromagnet due to the suction generated when the electromagnet is energized. When the electromagnet is de-energized, the suction disappears and the metal reed recovers. Continuous energization and de-energization cause the metal reed to vibrate, driving the optical fiber to oscillate up and down in a cycle. This significantly improves the laser's spot homogenization, solving the problem of laser speckle, while also preventing strain on the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the main view of the utility model;

[0012] Figure 2 yes Figure 1 a partial sectional view of the right side;

[0013] Figure 3 yes Figure 1 Stereoscopic image. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the embodiments given in the accompanying drawings.

[0015] Example 1, see Figure 1 、 2 As shown in Figure 3, a device for homogenizing the laser spot within the protective cover of a pan-tilt dome camera comprises a laser 1, an electromagnet 2, and a metal spring 3. The laser 1 is fixedly connected to the interior of a lower body 7, which is in turn fixedly connected to the protective cover of the pan-tilt dome camera. To better secure the electromagnet 2, an upper fixing plate 5 is secured to the lower body 7 via two fixing posts 6 and a rear fixing post 8. A mounting gap is provided between the upper fixing plate 5 and the lower body 7 for mounting the electromagnet 2 and for allowing the metal spring 3 to swing.

[0016] See also Figure 2 and 3 As shown, the electromagnet 2 has two relatively arranged parts, one of which is fixed on the upper fixing plate 5 and the other is fixed on the lower body 7, and the other end of the metal spring 3 passes through the gap between the two electromagnets 2. After the two electromagnets 2 are powered on and off in sequence, they can better drive the metal spring 3 to vibrate. One end of the metal spring 3 can be fixedly connected between the upper fixing plate 5 and the lower body 7 by means of a rear fixing column 8. The upper fixing plate 5 and the lower body 7 at the other end of the metal spring 3 are both provided with relatively arranged limiting protrusions 9. The limiting protrusions 9 can limit the vibration amplitude of the metal spring 3. In order to ensure that the optical fiber 4 is always in contact with the metal spring 3, the optical fiber 4 can be coiled around the metal spring 3.

[0017] During operation, the present invention generates suction when electromagnet 2 is energized, causing metal reed 3 to deform toward the electromagnet. When electromagnet 2 is de-energized, the suction ceases and the metal reed 3 recovers its deformation. Continuous energization and de-energization cause the metal reed 3 to vibrate, thereby driving the optical fiber 4 to cyclically vibrate up and down, significantly improving the uniformity of the laser's spot 1 and resolving the speckle problem. This also prevents strain on the optical fiber.

[0018] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A spot homogenizing device for a laser in a PTZ camera housing, characterized by: The invention comprises a laser (1), an electromagnet (2) and a metal reed (3); the laser (1) is connected to an optical fiber (4); the optical fiber (4) is connected to the metal reed (3); one end of the metal reed (3) is fixed, and the other end is close to the electromagnet (2).

2. The spot homogenizing device for a laser in a PTZ camera housing according to claim 1, characterized in that: The device further comprises an upper fixing plate (5) and a lower main body (7), wherein the laser (1) is fixed in the lower main body (7), the upper fixing plate (5) is fixed to the lower main body (7) via a fixing column (6), and an installation gap is provided between the upper fixing plate (5) and the lower main body (7).

3. The spot homogenizing device for a laser in a PTZ camera housing according to claim 1, characterized in that: The electromagnet (2) has two pieces, one of which is fixed on the upper fixing plate (5) and the other is fixed on the lower body (7), and the other end of the metal spring (3) passes through the gap between the two electromagnets (2).

4. The spot homogenizing device for a laser in a PTZ camera housing according to claim 1, characterized in that: One end of the metal spring (3) is fixedly connected between the upper fixing plate (5) and the lower main body (7) via a rear fixing column (8).

5. The spot homogenizing device for a laser in a PTZ camera housing according to claim 2, characterized in that: The upper fixing plate (5) and the lower main body (7) are both provided with limiting protrusions (9) arranged opposite to each other.

6. The spot homogenizing device for a laser in a protective cover of a PTZ camera according to claim 2, characterized in that: The optical fiber (4) is wound around the metal spring (3) and overlapped with the metal spring (3).

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