CN210179355U

CN210179355U - Laser flashlight lighting system with multiple optical axes and laser flashlight

Info

Publication number: CN210179355U
Application number: CN201920887203.5U
Authority: CN
Inventors: Cheng Huang; 黄成�; Zhiguo Zheng; 郑治国; Xiubin Li; 李秀斌; Guoping Chen; 陈国平
Original assignee: Guangzhou Guang Lian Electronic Technology Co Ltd
Current assignee: Guangzhou Guang Lian Electronic Technology Co Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-03-24
Anticipated expiration: 2029-06-13

Abstract

The utility model relates to a laser flashlight lighting system and a laser flashlight with multiple optical axes, wherein the lighting system comprises an incident optical system, a wavelength conversion device and an emergent optical system; the incident optical system comprises a laser and a plurality of optical reflectors, the laser is used for emitting exciting light, the last optical reflector is a right-angle prism, a high-reflection dielectric film used for reflecting the exciting light is arranged on the inclined plane of the right-angle prism, the plurality of optical reflectors are used for reflecting the exciting light for multiple times so as to fold light beams to form a multi-optical axis and guide the finally folded exciting light to the wavelength conversion device; the wavelength conversion device is used for absorbing part of the exciting light to form excited light; the excited light and the excited light which is not absorbed by the wavelength conversion device form illumination light to be emitted by an emission optical system; the optical axis of the exciting light emitted by the laser is not coincident with the emergent optical axis of the illuminating light. The utility model discloses when realizing the remote illuminating effect of high efficiency, reduce and use the laser risk, and the flashlight is small.

Description

Laser flashlight lighting system with multiple optical axes and laser flashlight

Technical Field

The utility model relates to a flashlight technical field, more specifically relates to a laser flashlight lighting system and laser flashlight that have many optical axes.

Background

The handheld lighting device is also called a flashlight, and due to the excellent portability, the handheld lighting device is widely used in many outdoor and other special application occasions, such as outdoor mountaineering, exploration, police search and rescue, small space lighting and other scenes.

The handheld lighting device is generally composed of a barrel and a barrel head, a power supply battery is arranged in the barrel, a specific light-emitting device is arranged on the barrel head, the handheld lighting device is applied to the light-emitting device of the flashlight, most traditional light source is a low-power halogen bulb, the light source has good color rendering, but the brightness and the efficiency are not superior, and the short service life is a fatal defect. Secondly, the semiconductor lighting LED which is popular in recent years is taken as a new light source, has high luminous efficiency, long service life and good stability, and tends to replace the traditional light source in various application fields. However, due to the extremely high requirement of portability when applied to the field of flashlights, the traditional halogen lamp or the LED light source is not an ideal point light source, which increases difficulty for secondary optics applied to the field of flashlights and brings unfavorable factors to the volume of the flashlights.

The development and application of the newer semiconductor laser technology has brought new opportunities for new flashlights, and the advantages of semiconductor lasers in the field of application of flashlights, such as directional lighting, are particularly prominent due to their excellent directivity, approaching point light sources as ideal light sources, and the high brightness of the laser. Based on the two characteristics of the laser, the volume of the flashlight can be greatly reduced, and the light irradiation distance is longer.

However, another problem of the laser is the safety of the laser, and the energy density of the laser is very high due to the high brightness of the laser, so that when a laser with such high power is used, the high power laser needs to be used with special caution because the laser is carelessly easy to cause serious injury to eyes or skin of related personnel, even serious accompanying injury such as fire, scald and the like, and especially irreversible injury to eyes of users.

Disclosure of Invention

The utility model aims at overcoming the defect among the above-mentioned prior art, provide a laser flashlight lighting system who has many optical axes, when the characteristics of the fabulous directionality of this laser flashlight lighting system's flashlight make full use of laser and high luminance realize the remote illumination of high efficiency, reduced the risk of using high-power laser technology widely, and the flashlight is small.

In order to achieve the purpose, the utility model adopts the technical proposal that: the laser flashlight illumination system with multiple optical axes comprises an incident optical system, a wavelength conversion device and an emergent optical system; the incident optical system comprises a laser and a plurality of optical reflectors, the laser is used for emitting exciting light, the last optical reflector is a right-angle prism, a high-reflection dielectric film used for reflecting the exciting light is arranged on the inclined plane of the right-angle prism, the plurality of optical reflectors are used for reflecting the exciting light for multiple times so as to fold light beams to form a multi-optical axis and guide the finally folded exciting light to the wavelength conversion device; the wavelength conversion device is used for absorbing part of the exciting light to form excited light; the excited light and the excited light which is not absorbed by the wavelength conversion device form illumination light to be emitted by an emission optical system; the optical axis of the exciting light emitted by the laser is not coincident with the emergent optical axis of the illuminating light.

The highly reflective dielectric film facilitates efficient reflection of light. The high-reflection dielectric film is an optical film made of nonmetallic compound coating materials, and has a metal film corresponding to the dielectric film; the highly reflective dielectric film is prior art and will not be described in detail herein.

In the scheme, the exciting light enters the wavelength conversion device after being folded through the multi-optical-axis light path under the reflection action of the optical reflectors, the illuminating light formed after passing through the wavelength conversion device is emitted by the emitting optical system, the high-efficiency long-distance illuminating effect is realized, the risk of using a high-power laser technology is greatly reduced because the optical axis of the exciting light emitted by the laser is not coincident with the emitting optical axis of the illuminating light, and the flashlight is small in size due to the fact that the laser is close to a point light source.

Preferably, the incident optical system further includes a first lenslet disposed between the laser and the first optical reflector, the first lenslet being for focusing the blue excitation light emitted by the laser onto the wavelength conversion device. The arrangement is such that the cross-sectional area of the blue excitation beam at the right angle prism position is reduced during laser transmission.

Further preferably, a second small lens is arranged between the right-angle prism and the wavelength conversion device, and the incident optical system and the exit optical system both comprise the second small lens. This arrangement facilitates focusing of the blue excitation light on the wavelength conversion device, which in turn facilitates formation of the illumination light.

Still further preferably, the exit optical system further includes an exit lens provided at an outermost portion in the light exit direction; the wavelength conversion device is positioned on a combined focus of the light-emitting lens and the second small lens; the excited light and the excited light which is not absorbed by the wavelength conversion device are collimated by the second small lens and the light-emitting lens to form nearly parallel illuminating light to be emitted. Different sizes and parameters of the light-emitting lens can be selected according to use requirements to match, so that the illumination angle of the optical system is changed, and the requirement of distance change is met.

Preferably, the optical reflector comprises the first optical reflector and the right-angle prism; the laser and the first optical reflector are arranged on the first optical axis, the emergent optical axis of the illuminating light is a second optical axis, and the wavelength conversion device is positioned on the second optical axis; the first optical reflector is used for deflecting blue exciting light emitted by the laser for the first time, the right-angle prism serving as the second optical reflector is arranged at the intersection position of the blue exciting light after the first deflection and the second optical axis, the right-angle prism is arranged on the optical glass flat sheet or the diffusion sheet with the light scattering function, and the right-angle prism is used for deflecting the blue exciting light after the first deflection for the second time so that the optical axis of the blue exciting light is coincided with the second optical axis. The optical axis of the blue excitation light deflected for the second time by the right-angle prism is superposed with the emergent optical axis of the illumination light, but the propagation direction is opposite; the optical glass flat sheet or the diffusion sheet with the light scattering function can not block light, and the emergent of illumination light is convenient.

Further preferably, the first optical axis and the second optical axis are parallel to each other and are arranged to be shifted. Defining the length direction of the flashlight as the longitudinal direction and the direction vertical to the longitudinal direction as the transverse direction; the arrangement is such that the blue excitation light emitted by the laser is longitudinal, and the arrangement of the laser does not cause the transverse dimension of the flashlight to be much larger than the original dimension.

Still further preferably, a shielding structure is provided behind the first optical reflector on the first optical axis in the emission direction of the blue excitation light. The shielding structure can be a blocking piece and is arranged on the optical glass flat sheet or the diffusion sheet with the light scattering function or arranged in front of or behind the optical glass flat sheet or the diffusion sheet; by the arrangement, the use risks that the optical system is damaged or used accidentally in the use process, or the original blue excitation light is directly emitted due to burning loss of each optical component in the laser conduction process can be avoided, so that the accidental use of the laser flashlight is prevented; in addition, the shielding structure also has the function of preventing light from overflowing.

Preferably, the specular reflection area of the slope of the right angle prism is larger than the cross-sectional area of the incident blue excitation beam, and the projected area in the direction perpendicular to the second optical axis is smaller than 1/3 of the cross-sectional area of the outgoing illumination beam at the position of the right angle prism and smaller than 1/2 of the cross-sectional area where the diameter of the second lenslet is largest. The right-angle prism is arranged on the second optical axis and can shield the emitted illumination light, so that the area of the inclined surface of the right-angle prism is required to be reduced as much as possible on the premise that the blue excitation light is incident, and the emission efficiency of the illumination light is increased.

Preferably, the wavelength conversion device is a yellow phosphor flake. The yellow phosphorus fluorescent powder is excited by part of exciting light to form excited light.

The utility model also provides another laser flashlight lighting system with multiple optical axes, which comprises the incident optical system, the wavelength conversion device and the emergent optical system; the incident optical system is multiple and arranged around the wavelength conversion device; and a second small lens is arranged between the integral structure formed by the last optical reflector in all the incident optical systems and the wavelength conversion device, and the incident optical system and the emergent optical system comprise the second small lens.

Above-mentioned scheme can be used for realizing high efficiency long distance or super long distance illumination, reduces the risk of using high-power laser technology simultaneously, and the flashlight is small.

In the prior art, in order to realize ultra-long distance illumination, a plurality of lasers are required to be coupled into a single beam of light to be emitted, at this time, a dichroic mirror is usually used as a light combining device to obtain illumination light, a reflective film for blue excitation light is designed on a coating film of the dichroic mirror, the reflective film is highly transparent to yellow light, when the blue excitation light is incident on the dichroic mirror, a first part of the blue excitation light is reflected and guided onto a wavelength conversion device, and a second part of the blue excitation light is transmitted and guided onto a lambertian scatterer by the dichroic mirror to form a lambertian secondary light source. The yellow light excited and radiated on the wavelength conversion device and the lambertian secondary light source formed are recombined on the dichroic mirror to form required illumination light, the scheme needs the dichroic mirror to perform light splitting and light combining functions, and is equivalent to two optical systems, the corresponding design volume of a product can be increased, the carrying is inconvenient, and the greatest significance of portability is lost.

The laser is a semiconductor laser device capable of emitting blue exciting light and is arranged on a first optical axis, the exciting light emitted by the laser is focused by a first small lens along the first optical axis, then the blue exciting light is deflected by a first optical reflector arranged on a path through which the blue exciting light passes by the first optical axis, the blue exciting light deflected by the first optical reflector is perpendicular to and intersected with a second optical axis (wherein the second optical axis is an emergent optical axis of the illuminating light), the blue exciting light is deflected for the second time under the action of a right-angle prism arranged at the intersection position of the blue exciting light and the second optical axis, the optical axis of the blue exciting light deflected for the second time is superposed with the emergent optical axis of the illuminating light, and the propagation directions are opposite. In this way, through the deflection light path of the first optical reflector and the right-angle prism as the second optical reflector, the blue excitation light is guided to the wavelength conversion device (yellow phosphorus phosphor powder sheet), the wavelength conversion device is excited by part of the blue excitation light to form excited light, the excited light and the excitation light which is not absorbed by the wavelength conversion device are collimated by the second small lens and the light-emitting lens to form near-parallel illumination light to be emitted, and therefore the effect of realizing high-efficiency long-distance illumination by the white laser flashlight is achieved.

Another object of the present invention is to provide a laser flashlight with multiple optical axes, which comprises a barrel and a barrel head, wherein the inside of the barrel head is provided with the above laser flashlight lighting system; the barrel is internally provided with a battery for providing electric energy for the laser, and the barrel is provided with a switch for controlling the laser to be turned on and off.

Compared with the prior art, the beneficial effects of the utility model are that:

the reflecting action of the optical reflectors enables exciting light to enter the wavelength conversion device after being folded through the multi-optical-axis light path, and the illuminating light formed after passing through the wavelength conversion device is emitted by the emitting optical system, so that the high-efficiency and long-distance illuminating effect is realized.

Drawings

Fig. 1 is a schematic diagram of a laser flashlight illumination system with multiple optical axes in embodiment 1.

Fig. 2 is a schematic diagram of a laser flashlight illumination system with multiple optical axes in embodiment 2.

Fig. 3 is a schematic diagram of an optical system for obtaining illumination light by combining blue excitation light emitted from a plurality of lasers using a dichroic mirror in the prior art in embodiment 2.

The attached drawings are as follows: 201 a laser; 301 a first lenslet; 401 a first optical reflector; 403 right-angle prism; 501 second lenslet; 601 a light-emitting lens; 701 a first optical axis; 702 a second optical axis; 801 a shielding structure; 901 a wavelength conversion device; 1001 optical glass plain film; 2001 dichroic mirror.

Detailed Description

The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; certain well-known structures in the drawings and possible omissions of their description will be apparent to those skilled in the art.

Example 1

As shown in fig. 1, the present embodiment provides a laser flashlight illumination system with multiple optical axes, which includes an incident optical system, a wavelength conversion device 901, and an exit optical system; the incident optical system comprises a laser 201 and a plurality of optical reflectors, the laser 201 is used for emitting blue excitation light, the last optical reflector is a right-angle prism 403, a high-reflection dielectric film used for reflecting the blue excitation light is arranged on the inclined surface of the right-angle prism 403, the plurality of optical reflectors are used for reflecting the blue excitation light for multiple times so as to fold light beams to form multiple optical axes and guide the finally folded blue excitation light to the wavelength conversion device 901; the wavelength conversion device 901 is used for absorbing part of the excitation light to form stimulated light; the excited light and the excited light not absorbed by the wavelength conversion device 901 form illumination light to be emitted by the emission optical system; the optical axis of the blue excitation light emitted by the laser 201 does not coincide with the emission optical axis of the illumination light.

The utility model discloses in, the reflex action of a plurality of optical reflectors makes blue exciting light get into wavelength conversion device 901 after through the folding back of many optical axis light paths, and the illumination light that forms behind wavelength conversion device 901 is by the outgoing optical system emergence, realizes the remote illuminating effect of high efficiency, because the blue exciting light place optical axis that laser 201 sent does not coincide with the outgoing optical axis of illumination light, has reduced the risk of using high-power laser technology widely, and laser access point light source makes flashlight 100 small.

Wherein the entrance optical system further comprises a first lenslet 301 arranged between the laser 201 and the first optical reflector 401, the first lenslet 301 being adapted to focus the blue excitation light emitted by the laser 201 onto the wavelength converting device 901. The light transmission of being convenient for of setting up like this reduces the light beam sectional area of light at the right angle prism position, and then reduces the size of right angle prism, increases the emergence efficiency of illumination light.

Further, a small lens 501 is provided between the right-angle prism 403 and the wavelength conversion device 901, and the incident optical system and the exit optical system each include the second small lens 501. This arrangement facilitates focusing of the blue excitation light on the wavelength conversion device 901, thereby facilitating formation of illumination light.

The emergent optical system also comprises an emergent lens 601 arranged at the outermost part of the emergent direction of the light; the wavelength conversion device 901 is located at the combined focal point of the light-emitting lens 601 and the second lenslet 501; the excited light and the excited light not absorbed by the wavelength conversion device 901 are collimated by the second small lens 501 and the light exit lens 601 to form nearly parallel illumination light and exit. Different sizes and parameters of the light-emitting lens 601 can be selected according to the use requirement to match, so as to change the illumination angle of the optical system and realize the requirement of distance change.

In addition, the optical reflector includes the first optical reflector 401 and the right-angle prism 403; the laser 201 and the first optical reflector 401 are arranged on the first optical axis 701, the emergent optical axis of the illumination light is a second optical axis 702, and the wavelength conversion device 901 is positioned on the second optical axis 702; the first optical reflector 401 is configured to perform a first deflection on the blue excitation light emitted by the laser 201, the right-angle prism 403 serving as a second optical reflector is disposed at a position where the blue excitation light after the first deflection intersects with the second optical axis 702, the right-angle prism 403 is disposed on the optical glass plate 1001 or the diffuser having a function of scattering light, and the right-angle prism 403 is configured to perform a second deflection on the blue excitation light after the first deflection so that the optical axis of the blue excitation light coincides with the second optical axis 702. The optical axis of the blue excitation light after the second deflection by the right-angle prism 403 is coincident with the emergent optical axis of the illumination light, but the propagation direction is opposite; the optical glass plate 1001 or the diffusion sheet having a function of scattering light rays facilitates the exit of illumination light.

In this embodiment, the first optical axis 701 and the second optical axis 702 are parallel to each other and are arranged in a staggered manner. Defining the length direction of the flashlight 100 as longitudinal direction and the direction perpendicular to the longitudinal direction as transverse direction; this arrangement allows the blue excitation light from laser 201 to be longitudinal, so that laser 201 is arranged such that the transverse dimension of flashlight 100 is not significantly greater than it was originally.

In this embodiment, a shielding structure 801 is disposed behind the first optical reflector 401 on the first optical axis 701 along the emission direction of the blue excitation light. The shielding structure 801 is disposed on the optical glass plate 1001 or the diffusion sheet with the function of scattering light, or disposed in front of or behind the optical glass plate or the diffusion sheet with the function of scattering light; by the arrangement, the use risks that the optical system is damaged or used accidentally in the use process, or the original blue excitation light is directly emitted due to burning loss of each optical component in the laser conduction process can be avoided, so that the accidental use of the laser flashlight 100 can be prevented; in addition, the shielding structure also has the function of preventing light from overflowing.

The specular reflection area of the inclined surface of the right-angle prism 403 is larger than the sectional area of the incident blue excitation light beam, and the projection area in the direction perpendicular to the second optical axis 702 is smaller than 1/3 of the sectional area of the emergent illumination light beam at the position of the right-angle prism 403 and smaller than 1/2 of the sectional area of the second lenslet where the diameter is the largest. Since the rectangular prism 403 is disposed on the second optical axis 702 to block the emitted illumination light, it is necessary to reduce the area of the inclined surface of the rectangular prism 403 as small as possible on the premise of satisfying the requirement for the incident blue excitation light, so as to increase the emission efficiency of the illumination light.

In this embodiment, the wavelength conversion device 901 is a yellow phosphor sheet. The yellow phosphorus fluorescent powder is excited by part of exciting light to form excited light.

In this embodiment, the laser 201 is a semiconductor laser device capable of emitting blue excitation light and is disposed on the first optical axis 701, the excitation light emitted by the laser 201 is focused by the first small lens 301 along the first optical axis 701, then the blue excitation light is deflected by the first optical reflector 401 disposed on a path through which the blue excitation light passes through the first optical axis 701, the blue excitation light deflected by the first optical reflector 401 is perpendicular to and intersects the second optical axis 702 (where the second optical axis 702 is an emission optical axis of the illumination light), and the blue excitation light is deflected for the second time by the right-angled prism 403 disposed at a position where the blue excitation light intersects the second optical axis 702, and the optical axis of the blue excitation light deflected for the second time coincides with the emission optical axis of the illumination light, and the propagation direction is opposite. In this way, the blue excitation light is guided to the wavelength conversion device 901 (yellow phosphor) through the first optical reflector 401 and the deflection light path of the right-angle prism 403 as the second optical reflector, the wavelength conversion device 901 is excited by a part of the blue excitation light to form excited light, the excited light and the excited light which is not absorbed by the wavelength conversion device 901 are collimated by the second small lens 501 and the light-emitting lens 601 to form near-parallel illumination light to be emitted, so that the white laser flashlight 100 can realize high-efficiency long-distance illumination.

The embodiment also provides a laser flashlight with multiple optical axes, which comprises a flashlight body and a flashlight head, wherein the flashlight head is internally provided with the laser flashlight lighting system; the barrel is internally provided with a battery for providing electric energy for the laser, and the barrel is provided with a switch for controlling the laser to be turned on and off. The switch is arranged to facilitate turning the flashlight on and off.

Example 2

The present embodiment provides another laser flashlight illumination system with multiple optical axes, as shown in fig. 2, including the incident optical system, the wavelength conversion device 901, and the exit optical system described in embodiment 1; it differs from example 1 in that: the incident optical system is plural and provided around the wavelength conversion device 901; and a second small lens 501 is arranged between the integral structure formed by the last optical reflector in all the incident optical systems and the wavelength conversion device 901, and the incident optical system and the exit optical system both comprise the second small lens 501.

The embodiment can be used for realizing high-efficiency long-distance or ultra-long-distance illumination, simultaneously reduces the risk of using a high-power laser technology, and has small volume.

In order to realize ultra-long distance illumination in the prior art, a plurality of lasers are required to be coupled into a single beam for emission, as shown in fig. 3, in this case, a dichroic mirror 2001 is usually used as a light combining device to obtain illumination light, a reflective film for blue excitation light is designed on a coating film of the dichroic mirror 2001, the reflective film is highly transparent to yellow light, when the blue excitation light is incident on the dichroic mirror 2001, a first part of the blue excitation light is reflected and guided to a wavelength conversion device 901, and a second part of the blue excitation light is transmitted and guided to a lambertian scatterer by the dichroic mirror 2001 to form a lambertian secondary light source. In this way, the yellow light emitted by the excitation on the wavelength converter device 901 and the formed lambertian secondary light source are recombined on the dichroic mirror 2001 to form the required illumination light, and this scheme requires the dichroic mirror 2001 to perform the light splitting and combining functions, which is equivalent to two optical systems, which increases the corresponding design volume of the product, is inconvenient to carry and loses the greatest significance of portability.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser flashlight lighting system with multiple optical axes is characterized by comprising an incident optical system, a wavelength conversion device (901) and an emergent optical system; the incident optical system comprises a laser (201) and a plurality of optical reflectors, the laser (201) is used for emitting exciting light, the last optical reflector is a right-angle prism (403), a high-reflection dielectric film used for reflecting the exciting light is arranged on the inclined surface of the right-angle prism (403), the plurality of optical reflectors are used for reflecting the exciting light for multiple times to fold a light beam to form a multi-optical axis and guiding the finally folded exciting light to the wavelength conversion device (901); the wavelength conversion device (901) is used for absorbing part of the excitation light to form stimulated light; the excited light and the excited light not absorbed by the wavelength conversion device (901) form illumination light to be emitted by an emission optical system; the optical axis of the excitation light emitted by the laser (201) does not coincide with the emission optical axis of the illumination light.

2. A laser flashlight illumination system with multiple optical axes as claimed in claim 1, wherein said incident optical system further comprises a first lenslet (301) disposed between the laser (201) and the first optical reflector (401), the first lenslet (301) being configured to focus the blue excitation light emitted by the laser (201) onto the wavelength conversion device (901).

3. A laser flashlight illumination system with multiple optical axes as claimed in claim 2, wherein a second small lens (501) is arranged between the right-angle prism (403) and the wavelength conversion device (901), and the incident optical system and the emergent optical system both comprise the second small lens (501).

4. A laser flashlight illumination system with multiple optical axes as claimed in claim 3, wherein the exit optical system further includes an exit lens (601) disposed at the outermost portion in the light exit direction; the wavelength conversion device (901) is positioned on the combined focal point of the light-emitting lens (601) and the second small lens (501); the excited light and the excited light not absorbed by the wavelength conversion device (901) are collimated by the second small lens (501) and the light exit lens (601) to form nearly parallel illuminating light and then emitted.

5. A laser flashlight illumination system with multiple optical axes as claimed in claim 3, wherein the optical reflector comprises the first optical reflector (401) and the right-angle prism (403); the laser (201) and the first optical reflector (401) are arranged on a first optical axis (701), the emergent optical axis of the illuminating light is a second optical axis (702), and the wavelength conversion device (901) is positioned on the second optical axis (702); the first optical reflector (401) is used for deflecting blue excitation light emitted by the laser (201) for the first time, a right-angle prism (403) serving as a second optical reflector is arranged at the intersection position of the blue excitation light after the first deflection and the second optical axis (702), the right-angle prism (403) is arranged on an optical glass plain film (1001) or a diffusion sheet with a light scattering function, and the right-angle prism (403) is used for deflecting the blue excitation light after the first deflection for the second time so that the optical axis of the blue excitation light is overlapped with the second optical axis (702).

6. A laser flashlight illumination system with multiple optical axes as claimed in claim 5, wherein the first optical axis (701) and the second optical axis (702) are parallel to each other and are staggered.

7. A laser flashlight illumination system with multiple optical axes according to claim 6, wherein a shielding structure (801) is arranged behind the first optical reflector (401) on the first optical axis (701) in the exit direction of the blue excitation light.

8. A laser flashlight illumination system with multiple optical axes as claimed in claim 5, wherein the specular reflection area of the slope of the right angle prism (403) is larger than the cross-sectional area of the incident blue excitation beam, and the projection area on the perpendicular second optical axis (702) is smaller than 1/3 of the cross-sectional area of the emergent illumination beam at the position of the right angle prism (403) and smaller than 1/2 of the cross-sectional area of the second small lens (501) with the largest diameter.

9. A laser flashlight illumination system with multiple optical axes according to any one of claims 1 to 8, wherein the incident optical system is multiple and is disposed around the wavelength conversion device (901); and a second small lens (501) is arranged between the integral structure formed by the last optical reflector in all the incident optical systems and the wavelength conversion device (901), and the incident optical systems and the emergent optical systems comprise the second small lens (501).

10. A laser flashlight with multiple optical axes, which comprises a flashlight body and a flashlight head, wherein the flashlight head is internally provided with the laser flashlight lighting system as claimed in any one of claims 1 to 9; the barrel is internally provided with a battery for providing electric energy for the laser, and the barrel is provided with a switch for controlling the laser to be turned on and off.