Infrared Zoom Illuminating Device

Abstract

An infrared zoom illuminating device includes a lens holder, a curvedly-grooved cylinder sleeved on the lens holder, an infrared emitter fixed to the lens holder, a condenser lens group fixed to the lens holder, a protective glass fixed to the lens holder, the condenser lens group located between the infrared emitter and the protective glass, and a first moving lens group and a second moving lens movably connected to the lens holder and arranged between the condenser lens group and the protective glass. The condenser lens group condenses the infrared light emitted by the infrared LED to prevent light loss during zooming process. Straight grooves and curved grooves define moving distance of the first and second moving lens groups to achieve continuous zooming. The limit ring restricts the axial movement of the curvedly-grooved cylinder to ensure the stability of rotation of the curvedly-grooved cylinder.

Claims

1. An infrared zoom illuminating device comprising a lens holder and a curvedly-grooved cylinder, characterized in that: the curvedly-grooved cylinder is sleeved on an outer surface of the lens holder, a bottom end of the lens holder is disposed with an infrared emitter, a condenser lens group is disposed to the lens holder, a protective glass is disposed to the lens holder, the condenser lens group is located between the infrared emitter and the protective glass, and a first moving lens group and a second moving lens group that are movably connected to the lens holder are arranged between the condenser lens group and the protective glass.

2. The infrared zoom illuminating device as claimed in claim 1, wherein two straight grooves are provided on the outer surface of the lens holder.

3. The infrared zoom illuminating device as claimed in claim 2, wherein two curved grooves are provided on an outer surface of the curvedly-grooved cylinder, and the curved grooves are nonlinear curved grooves.

4. The infrared zoom illuminating device as claimed in claim 1, wherein the first moving lens group and the second moving lens group both include a lens mount in which being disposed a plurality of moving lenses, a top of the plurality of moving lenses is provided with a press ring disposed to the lens mount, both left and right sides of the lens mount are provided with a fixing hole, in which a pin is inserted, the pin has a first end inserted through and slidably connected with a corresponding one of the straight grooves and a corresponding one of the curved grooves, and a second end that is away from the first moving lens group and the second moving lens group and is sleeved by a copper sleeve.

5. The infrared zoom illuminating device as claimed in claim 4, wherein a limit ring is disposed to the outer surface of the lens holder.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a schematic diagram of the structure of an infrared zoom illuminating device;

[0017] FIG. 2 is a schematic diagram of the structure in the infrared zoom illuminating device;

[0018] FIG. 3 is a schematic diagram of the structure of the infrared zoom illuminating device;

[0019] FIG. 4 is a schematic diagram of the structure of a part of the infrared zoom illuminating device; and

[0020] FIG. 5 is a schematic diagram of the structure of a part of the infrared zoom illuminating device.

DETAILED DESCRIPTION

[0021] The technical solution of this patent will be described in further detail below in conjunction with specific embodiments.

[0022] The embodiments of this patent are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the patent, and cannot be understood as a limitation to the patent.

Embodiment 1

[0023] Referring to FIGS. 1-5, in a first embodiment of the present invention, an infrared zoom illuminating device includes a lens holder 2 and a curvedly-grooved cylinder 6 sleeved on an outer surface of the lens holder 2. A bottom end of the lens holder 2 is disposed with an infrared emitter 1, a condenser lens group 3 is disposed to the lens holder 2, a protective glass 7 is disposed to the lens holder 2, the condenser lens group 3 is located between the infrared emitter 1 and the protective glass 7, and a first moving lens group 4 and a second moving lens group 5 that are movably connected to the lens holder 2 are arranged between the condenser lens group 3 and the protective glass 7. By arranging the condenser lens group 3, the infrared zoom illuminating device can condense the infrared light emitted by the infrared LED, so that no light loss occurs during the zooming process.

Embodiment 2

[0024] In this embodiment, two straight grooves 11 are provided on the outer surface of the lens holder 2.

[0025] In this embodiment, two curved grooves 12 are provided on an outer surface of the curvedly-grooved cylinder 6, and the curved grooves 12 are nonlinear curved grooves.

[0026] In this embodiment, the first moving lens group 4 and the second moving lens group 5 both include a lens mount 16 in which being disposed a plurality of moving lenses 13, and the top of the moving lenses 13 is provided with a press ring 14 disposed to the lens mount 16. Both the left and right sides of the lens mount 16 are provided with a fixing hole 15 in which a pin 9 is inserted. The pin 9 has a first end inserted through and slidably connected with a corresponding one of the straight grooves 11 and a corresponding one of the curved grooves 12, and a second end that is away from the first moving lens group 4 and the second moving lens group 5 and is sleeved by a copper sleeve 10. By the arrangement of the straight grooves 11 and the curved grooves 12, it can effectively control the displacement distances of the first moving lens group 4 and the second moving lens group 5 to achieve continuous zooming. Moreover, since the night vision device can control the power of the infrared transmitter, the infrared illuminating on the night vision device can therefore be controlled comprehensively, which greatly improves the viewing range of the night vision device.

[0027] In this embodiment, a limit ring 8 is disposed to the outer surface of the lens holder 2. By the arrangement of the limit ring 8, the axial displacement of the curvedly-grooved cylinder 6 can be restricted, thereby ensuring the stability of rotation of the curvedly-grooved cylinder 6.

[0028] The infrared zoom illumination device, by the arrangement of the condenser lens group 3, can condense the infrared light emitted by the infrared LED, so that there will be no light loss during the zooming process. By the arrangement of the straight grooves 11 and the curved grooves 12, the infrared zoom illumination device can effectively control the displacement distances of the first moving lens group 4 and the second moving lens group 5 to achieve continuous zooming. Moreover, since the night vision device can control the power of the infrared transmitter, the infrared illuminating on the night vision device can therefore be controlled comprehensively, which may greatly improve the viewing range of the night vision device. By the arrangement of the limit ring 8, the axial displacement of the curvedly-grooved cylinder 6 can be restricted, thereby ensuring the stability of rotation of the curvedly-grooved cylinder 6.

[0029] The working principle of the invention is: the curvedly-grooved cylinder 6 is sleeved on the outer surface of the lens holder 2, the first moving lens group 4 and the second moving lens group 5 are both arranged inside the lens holder 2, the pins 9 pass through the curved grooves 12 of the curvedly-grooved cylinder 6 and the straight grooves 11 of the lens holder 2 and are then fixed to the lens mount 16, each of the pins 9 is sleeved by a copper sleeve 10, the infrared emitter 1, the condenser lens group 3 and the protective glass 7 are all fixed on the lens holder 2, and the limit ring 8 of the lens holder 2 can limit the axial movement of the curvedly-grooved cylinder 6 so that the curvedly-grooved cylinder 6 can only rotate; and after such an infrared zoom illumination device is fixed on the night vision device through the lens holder 2, the curvedly-grooved cylinder 6 is rotated to drive the first moving lens group 4 and the second moving lens group 5 to move in the lens holder 2 through the copper sleeve 10 and the pins 9, and with the rotation of the curvedly-grooved cylinder 6, the positions of both the first moving lens group 4 and the second moving lens group 5 can be changed, thereby changing the infrared emission angle.

[0030] The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these should also be regarded as the protection scope of the invention and will not affect the effect and practicality of the implementation of the invention.