A dual-light coaxial module based on dichroic mirror

Abstract

The present invention provides a dual-light coaxial module based on a dichroic mirror, which relates to the field of optoelectronic technology and solves the technical problems of the prior art dual-light modules with complex structures, large volumes, and complex adjustment operations. The dual-light coaxial module based on a dichroic mirror includes a module body provided with a beam splitter slot, a first emitting device slot, and a second emitting device slot, a first laser emitting device, a second laser emitting device, and a dichroic beam splitter; the first laser beam emitted by the first laser emitting device can irradiate the first surface of the dichroic beam splitter and be reflected by the first surface; the second laser beam emitted by the second laser emitting device can irradiate the second surface of the dichroic beam splitter and be refracted by the dichroic beam splitter and emitted from the first surface of the dichroic beam splitter and coaxially overlap with the reflected first laser beam, and the coaxially overlapped laser beam is emitted from the light outlet of the module body. The present invention is used to provide a dual-light module with a sophisticated structure and simple adjustment and operation.

Description

Technical Field

[0001] The invention relates to the field of optoelectronic technology, and in particular to a dual-light coaxial module based on a dichroic mirror. Background Art

[0002] The dual-light module has many applications. For example, it can be used as a laser light source in the aiming device of firearms in outdoor sports such as hunting and shooting training. The invisible light band is used for training, while the visible light band can be used for calibration.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] The dual-light modules currently on the market are all two independent lasers, and then through their own independent adjustment systems, the light beams are made into parallel beams or beams that intersect at a certain point, and it is impossible to achieve coaxial output of two beams of light. As a result, the structure is complex, the volume is large, and the adjustment and operation are also complicated. Summary of the invention

[0005] The purpose of the present invention is to provide a dual-light coaxial module based on a dichroic mirror to solve the technical problems of the prior art dual-light module having a complex structure, large volume, and complicated adjustment and operation. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The dual-light coaxial module based on a dichroic mirror provided by the present invention comprises a module body, a first laser emitting device, a second laser emitting device and a dichroic beam splitter, wherein:

[0008] The module body is provided with a beam splitter slot, a first emitting device slot and a second emitting device slot, the beam splitter slot is respectively connected with the first emitting device slot and the second emitting device slot, the dichroic beam splitter, the first laser emitting device and the second laser emitting device are respectively inserted into the beam splitter slot, the first emitting device slot and the second emitting device slot;

[0009] The first laser beam emitted by the first laser emitting device can irradiate the first surface of the dichroic beam splitter and be reflected by the first surface of the dichroic beam splitter; the second laser beam emitted by the second laser emitting device can irradiate the second surface of the dichroic beam splitter and be emitted from the first surface of the dichroic beam splitter after being refracted by the dichroic beam splitter and coaxially overlap with the first laser beam reflected by the first surface of the dichroic beam splitter, and the coaxially overlapped first laser beam and second laser beam are emitted from the light outlet on the module body.

[0010] Furthermore, the module body includes a first arm and a second arm that are at right angles to each other and connected to each other, the first transmitting device slot and the second transmitting device slot are respectively arranged axially along the first arm and the second arm, the beam splitter slot is obliquely arranged between the first arm and the second arm, the beam splitter slot is respectively connected to the first transmitting device slot and the second transmitting device slot, and the angles between the axes of the first arm and the second arm and the beam splitter slot are both 45°; the light outlet on the module body is arranged on the first arm.

[0011] Furthermore, a light outlet spherical head is provided at the light outlet of the module body, and a light outlet channel is provided in the light outlet spherical head. The first laser beam and the second laser beam after coaxial overlap are emitted through the light outlet on the module body and the light outlet channel in sequence.

[0012] Furthermore, the light-emitting ball head is threadedly connected to the module body.

[0013] Furthermore, the inner surface of the light outlet channel of the light outlet ball head is provided with black matte screw threads.

[0014] Furthermore, there is a second circumferential gap between the second laser emitting device and the second emitting device slot, and a radial adjustment device for adjusting the second circumferential gap is provided on the module body.

[0015] Furthermore, the radial adjustment device is an adjustment screw, which passes through the module body part in the circumferential direction of the second emitting device slot, and the end of the adjustment screw abuts against the circumference of the second laser emitting device inserted in the second emitting device slot.

[0016] Furthermore, the number of the adjusting top screws is four.

[0017] Furthermore, there is a first circumferential gap between the first laser emitting device and the first emitting device slot, and a radial adjustment device for adjusting the first circumferential gap is provided on the module body.

[0018] Furthermore, the dichroic beam splitter comprises a beam splitter body and coating layers on two sides of the beam splitter body, and the coating layers are interference-type hard dielectric films.

[0019] The beneficial effects of the dual-light coaxial module based on the dichroic mirror of the present invention are:

[0020] The present invention utilizes a module body to fix a dichroic mirror (i.e., a two-color mirror), a first laser emitting device, and a second laser emitting device in corresponding slots thereon respectively. The surface of the two-way dichroic mirror can refract a laser beam of a certain band and reflect a laser beam of another band. In the present invention, the two-way dichroic mirror reflects the first laser beam and refracts the second laser beam. When the refracted light beam of the second laser emitting device and the reflected light beam of the reflected laser overlap, the two laser beams of different bands are coaxially output. Compared with the dual-light module in the prior art, the present invention has a simple and exquisite structure, a small size, and is very convenient to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is an exploded view of a dual-light coaxial module based on a dichroic mirror of the present invention;

[0023] Figure 2 The present invention is a schematic diagram of the optical path of a dual-light coaxial module based on a dichroic mirror.

[0024] In the figure: 1. dichroic beam splitter; 2. light emitting ball head; 3. first laser emitting device; 31. first laser beam; 4. adjusting top screw; 5. second laser emitting device; 51. second laser beam. DETAILED DESCRIPTION

[0025] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0026] like Figure 1 and Figure 2 As shown, the present invention provides a dual-light coaxial module based on a dichroic mirror, comprising a module body, a first laser emitting device 3, a second laser emitting device 5 and a dichroic beam splitter 1; the module body is provided with a beam splitter slot, a first emitting device slot and a second emitting device slot, and the dichroic beam splitter 1, the first laser emitting device 3 and the second laser emitting device 5 are respectively inserted into the beam splitter slot, the first emitting device slot and the second emitting device slot;

[0027] The first laser beam 31 emitted by the first laser emitting device 3 can irradiate the first surface of the dichroic beam splitter 1 and be reflected by the first surface of the dichroic beam splitter 1; the second laser beam 51 emitted by the second laser emitting device 5 can irradiate the second surface of the dichroic beam splitter 1 and be refracted by the dichroic beam splitter 1 and then emitted from the first surface of the dichroic beam splitter 1 and coaxially overlap with the first laser beam 31 reflected by the first surface of the dichroic beam splitter 1. The coaxially overlapped first laser beam 31 and second laser beam 51 are emitted from the light outlet on the module body.

[0028] The present invention utilizes a module body to fix a dichroic mirror 1, a first laser emitting device 3, and a second laser emitting device 5 in corresponding slots thereon respectively. The surface of the dichroic mirror can refract a laser beam of a certain band and reflect a laser beam of another band. In the present invention, the dichroic mirror reflects the first laser beam 31 and refracts the second laser beam 51. When the refracted light beam of the second laser emitting device 5 and the reflected light beam of the reflected laser coincide, the two laser beams of different bands are coaxially output. Compared with the dual-light module of the prior art, the present invention has a simple and exquisite structure, a small size, and is very convenient to install and disassemble.

[0029] As an optional embodiment, the module body includes a first arm and a second arm that are connected to each other at right angles, the first transmitting device slot and the second transmitting device slot are respectively arranged axially along the first arm and the second arm, the spectrometer slot is obliquely arranged between the first arm and the second arm, the spectrometer slot is respectively connected to the first transmitting device slot and the second transmitting device slot, and the angle between the axis of the first arm and the axis of the second arm and the spectrometer slot is 45°; the light outlet on the module body is arranged on the first arm.

[0030] The module body includes a first arm and a second arm which are connected to each other at right angles. The opening of the first emitting device slot is arranged at the end of the first arm and the first emitting device slot is arranged along the axial direction of the first arm. Similarly, the opening of the second emitting device slot is arranged at the end of the second arm and the second emitting device slot is arranged along the axial direction of the second arm. When installing, the first laser emitting device 3 and the second laser emitting device 5 can be inserted from the openings at the ends of the first arm and the second arm respectively; and the beam splitter slot is arranged at the right angle formed by the first arm and the second arm, and bisects the right angle, that is, the angles between the axis of the first arm and the axis of the second arm and the beam splitter slot are both 45°;

[0031] In this embodiment, the cross-sections of the first arm and the second arm are both square, and the opening of the spectroscope slot is set at the common edge of the first arm and the second arm to facilitate the oblique insertion of the dichroic spectroscope 1. Of course, the opening of the spectroscope slot can also be set laterally, that is, inserted from the side.

[0032] As an optional implementation, a light outlet spherical head 2 is provided at the light outlet of the module body, and a light outlet channel is provided inside the light outlet spherical head 2. The coaxially overlapped first laser beam 31 and second laser beam 51 are emitted in sequence through the light outlet and the light outlet channel on the module body.

[0033] Since the dual-light coaxial module based on the dichroic mirror of the present invention usually needs to be used in conjunction with an external mechanical structure, for example, the dual-light coaxial module based on the dichroic mirror is placed in a shell, and the actual position of the dual-light coaxial module based on the dichroic mirror in the shell may need to be fine-tuned to adjust the light output angle at the light output port of the shell, therefore, a light output ball head 2 is provided at the light output port of the module body, so that the light output ball head 2 can be easily rotated in the shell with a spherical accommodating inner cavity and adjust the light output angle at the light output port of the shell.

[0034] As an optional implementation, the light-emitting ball head 2 is threadedly connected to the module body.

[0035] The light-emitting ball head 2 is detachably fixedly connected to the module body, which facilitates the independent production and replacement of each component.

[0036] As an optional implementation, the inner surface of the light outlet channel of the light outlet ball head 2 is provided with black matte screw threads.

[0037] The black matte screw thread arranged on the inner surface of the light outlet channel of the light outlet ball head 2 can perform aperture matte processing on the laser light beam passing through the light outlet channel to eliminate stray light.

[0038] As an optional implementation, there is a second circumferential gap between the second laser emitting device 5 and the second emitting device slot, and a radial adjustment device for adjusting the second circumferential gap is provided on the module body.

[0039] After the first laser emitting device 3 and the second laser emitting device 5 are respectively inserted into the first emitting device slot and the second emitting device slot, in fact, due to the processing technology, the emitted first laser beam 31 and the second laser beam 51 may not completely overlap after reflection and refraction, and there may be a slight deviation angle. Therefore, in order to make the first laser beam 31 and the second laser beam 51 completely overlap after reflection and refraction, it is necessary to adjust the incident angle of at least one of the laser beams. Therefore, a second circumferential gap is set between the second laser emitting device 5 and the second emitting device slot, and the radial adjustment device is used to adjust the second laser emitting device 5 in the radial direction, so that the first laser beam 31 and the second laser beam 51 completely overlap after reflection and refraction.

[0040] As an optional embodiment, the radial adjustment device is an adjustment screw 4, which passes through the module body part in the circumferential direction of the second emitting device slot, and the end of the adjustment screw 4 contacts the circumference of the second laser emitting device 5 inserted in the second emitting device slot.

[0041] The structure is simple and easy to operate by adjusting the top screw. It only needs to open a hole on the module body of the circumferential wall of the second emitting device slot and set a top screw. The radial position of the second laser emitting device 5 in the second emitting device slot can be adjusted by screwing in and out the top screw.

[0042] As an optional implementation, the number of the adjusting top screws 4 is four.

[0043] In this embodiment, the cross-section of the second arm is square, so an adjusting screw 4 is provided on each of the cross-sections on the four sides of the second arm to facilitate precise adjustment of the second laser emitting device 5 inserted in the second emitting device slot. Of course, the cross-section of the second arm can also be circular or other shapes, and the number of adjusting screws 4 can be less or more.

[0044] As an optional implementation, there is a first circumferential gap between the first laser emitting device 3 and the first emitting device slot, and a radial adjustment device for adjusting the first circumferential gap is provided on the module body.

[0045] Similar to the arrangement of the second laser emitting device 5 and the second emitting device slot, a first circumferential gap can be set between the first laser emitting device 3 and the first emitting device slot, and the first laser emitting device 3 can be adjusted in the radial direction using the adjusting screw 4, so that the first laser beam 31 and the second laser beam 51 completely overlap after reflection and refraction.

[0046] As an optional implementation, the dichroic beam splitter 1 includes a beam splitter body and coating layers on both sides of the beam splitter body, and the coating layers are interference-type hard dielectric films.

[0047] The two surfaces of the beam splitter body are treated with a coating process. Based on the characteristics of the dichroic mirror, which is almost completely transparent to light of a certain wavelength (band) and almost completely reflects light of other wavelengths (bands), a certain wavelength of light is incident at 45 degrees to separate the light source into a specific spectrum and change the direction of the light path of part of the spectrum to make a dual-light coaxial module. The dichroic beam splitter 1 has high transmittance (penetration greater than 97%), high reflection efficiency (reflection greater than 99%), low absorption, low dispersion, low laser loss, clear color, no stray light, and no difference in film surface (the front and back sides have the same effect);

[0048] Dichroic beam splitters are used with interference-type hard dielectric films. When light is incident at 45°, dichroic beam splitters allow near-infrared light to pass through and reflect visible light. The transmission area and the reflection area are clearly demarcated. Unlike colored glass filters, dichroic beam splitters have shorter cut-off wavelengths and smaller incident angles.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A dual-light coaxial module based on a dichroic mirror, characterized in that: The module comprises a module body, a first laser emitting device, a second laser emitting device and a dichroic beam splitter, wherein: The module body is provided with a beam splitter slot, a first emitting device slot and a second emitting device slot, the beam splitter slot is respectively connected with the first emitting device slot and the second emitting device slot, the dichroic beam splitter, the first laser emitting device and the second laser emitting device are respectively inserted into the beam splitter slot, the first emitting device slot and the second emitting device slot; The first laser emitting device and the second laser emitting device can emit laser beams of different wavelength bands; the first laser beam emitted by the first laser emitting device can irradiate the first surface of the dichroic beam splitter and be reflected by the first surface of the dichroic beam splitter, the second laser beam emitted by the second laser emitting device can irradiate the second surface of the dichroic beam splitter and be emitted from the first surface of the dichroic beam splitter after being refracted by the dichroic beam splitter and coaxially overlap with the first laser beam reflected by the first surface of the dichroic beam splitter, and the first laser beam and the second laser beam after coaxial overlap are emitted from the light outlet on the module body; The module body comprises a first arm and a second arm connected to each other at right angles, the first emitting device slot and the second emitting device slot are arranged axially along the first arm and the second arm respectively, the beam splitter slot is arranged obliquely between the first arm and the second arm, and the included angles between the axis of the first arm and the axis of the second arm and the beam splitter slot are both 45°; the light outlet on the module body is arranged on the first arm; There is a first circumferential gap between the first laser emitting device and the first emitting device slot, and a radial adjustment device for adjusting the first circumferential gap is provided on the module body; there is a second circumferential gap between the second laser emitting device and the second emitting device slot, and a radial adjustment device for adjusting the second circumferential gap is provided on the module body; A light outlet spherical head is arranged at the light outlet of the module body, and a light outlet channel is arranged in the light outlet spherical head. The first laser beam and the second laser beam after coaxial overlap are emitted through the light outlet on the module body and the light outlet channel in sequence.

2. The dual-light coaxial module based on a dichroic mirror according to claim 1, characterized in that: The light-emitting ball head is threadedly connected to the module body.

3. The dual-light coaxial module based on a dichroic mirror according to claim 1, characterized in that: The radial adjustment device is an adjustment screw, which passes through the module body part in the circumferential direction of the second emitting device slot, and the end of the adjustment screw abuts against the circumference of the second laser emitting device inserted in the second emitting device slot.

4. The dual-light coaxial module based on a dichroic mirror according to claim 3, characterized in that: The number of the adjusting top screws is four.

5. The dual-light coaxial module based on a dichroic mirror according to claim 1, characterized in that: The dichroic beam splitter comprises a beam splitter body and coating layers on two sides of the beam splitter body, and the coating layers are interference-type hard dielectric films.

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