CN216202860U - Lighting device for archives - Google Patents

Abstract

The utility model relates to an archive illumination device, which comprises a laser light source for emitting laser and a light guide body, wherein the light guide body is made of a heat conduction material and comprises a first end and a second end, the first end is provided with a light through port, the light through port extends from the first end to the second end, and the inner wall of the light through port is a reflecting surface; the laser excitation wavelength conversion device is used for exciting the laser, the excited wavelength conversion device emits excited light, and at least part of the excited light is emitted from the second end after being reflected by the inner wall of the light transmission port; the light guide body can guide the received laser from the first end to the second end of the light guide body to emit, so that the position of the light emitting point is changed; the light guide body is made of heat conducting materials, so that heat generated when the wavelength conversion device converts laser can be transferred to the light guide column, the heat dissipation area of the wavelength conversion device is increased, the heat dissipation speed is increased, and the conversion efficiency of the wavelength conversion device on the laser is reduced under the influence of temperature.

Description

Lighting device for archives

Technical Field

The utility model relates to the technical field of illumination, in particular to an illumination device for an archive.

Background

A large number of books and related documents are stored in an existing archive, and a sufficiently bright illumination device is required to illuminate the entire archive in order to facilitate searching for desired archives and documents. Laser lighting devices have been gradually scaled up in the lighting market due to their advantages of high brightness and low power consumption. The working principle of the laser lighting device is as follows: the laser source emits laser, the wavelength conversion device converts the laser into a received laser, and the received laser is reflected and emitted by the reflecting cup to form emergent light. However, the laser lighting device generally needs to be used in cooperation with the reflective cup, when the laser lighting device is used in cooperation with the reflective cup, the reflective cup has a focus, and only when the wavelength conversion device is located at the focus to emit light, the reflective cup can collect and utilize the received laser to the maximum extent. The wavelength conversion device has a certain volume, and if the wavelength conversion device is placed at the focus of the reflective cup, the wavelength conversion device will affect the emission of the laser. Therefore, the stimulated light is required to be arranged at the focus of the reflecting cup to emit light to the maximum extent.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to overcome the above-mentioned disadvantages of the conventional art, and the present invention provides a high-brightness illumination apparatus.

In order to solve the problems, the technical scheme adopted by the utility model is as follows: an archives lighting device comprises a laser source emitting laser and a light guide body, wherein the light guide body is made of heat conducting materials and comprises a light through hole, the light through hole extends from a first end to a second end of the light guide body, and a reflecting surface is arranged on the inner wall of the light through hole; the wavelength conversion device covers the light through opening, one side of the wavelength conversion device, which is far away from the light through opening, is excited by laser, the excited wavelength conversion device emits excited light, the excited light emits light towards the light through opening, and at least part of the excited light is emitted by the second end after being reflected by the reflecting surface.

As an improvement of the technical scheme: the light scattering body covers the second end, and the outer wall of the light scattering body is a rough surface.

As an improvement of the technical scheme: the light scattering body is a transparent cone or a transparent cone shell, the bottom surface of the transparent cone or the transparent cone shell is tightly attached to the second end, and the side surface of the transparent cone or the transparent cone shell is a rough surface.

As an improvement of the technical scheme: the light guide body is arranged in the light guide body, and the light guide body is arranged in the light guide body.

As an improvement of the technical scheme: still include the fixed station of being connected with first end, the fixed station covers logical light mouth, the fixed station includes the through-hole, the through-hole sets up around wavelength conversion device, wavelength conversion device and fixed station heat conduction are connected.

As an improvement of the technical scheme: the wavelength conversion device is located between the first end and the second end.

As an improvement of the technical scheme: still include unable adjustment base, unable adjustment base's one end is connected with the fixed station, the one end that the unable adjustment base that laser source was fixed to be set up is close to the light guide body.

As an improvement of the technical scheme: one end of the fixing base close to the light guide body is sunken towards one end of the fixing base far away from the light guide body to form a fixing groove, the laser light source is positioned in the fixing groove, and heat conduction silicon is filled between the laser light source and the fixing groove.

As an improvement of the technical scheme: the side of the laser light source emitting laser faces the wavelength conversion device.

As an improvement of the technical scheme: the aperture of the light through port is gradually reduced from the first end to the second end.

Due to the adoption of the technical scheme, compared with the prior art, the wavelength conversion device converts laser into received laser, the received laser enters the light guide body from the light through port, and part of the received laser is reflected by the reflecting surface, guided to the second end by the first end of the light guide body and emitted out, so that the position of the light emitting point of the wavelength conversion device and the size of the light emitting point are changed; the light guide body is made of heat conducting materials, and the wavelength conversion device is arranged on the light guide body, so that heat generated when the wavelength conversion device is excited is transferred to the light guide column, the temperature of the wavelength conversion device is reduced, the heat dissipation speed is increased, and the conversion efficiency of the wavelength conversion device to laser is improved; the wavelength conversion device emits light in Lambert mode, has a large light emitting area, and the aperture of the light inlet is controllable, so that after laser light passes through the light guide body, the light emitting area of the light guide body is controllable, namely the light flux of the emitted laser light is controllable.

The utility model is further described with reference to the following figures and detailed description.

Drawings

Fig. 1 is a perspective view of an archive lighting device.

Fig. 2 is a cross-sectional view of an archive lighting device.

Fig. 3 is a cross-sectional view of a light diffuser.

Fig. 4 is a cross-sectional view of a reflector cup.

Fig. 5 is a cross-sectional view of an archive lighting device.

Fig. 6 is a block diagram of an archive lighting device.

Fig. 7 is a light path diagram of the stimulated light.

Detailed Description

Example (b):

as shown in fig. 1-7, an archive lighting device comprises a laser light source 111 emitting laser light 121, and further comprises a light guide 101, wherein the light guide 101 is made of a heat conducting material, the light guide 101 comprises a light through opening 104, the light through opening 104 extends from a first end 102 to a second end 103 of the light guide 101, and the inner wall of the light through opening 104 comprises a reflecting surface; the laser processing device further comprises a wavelength conversion device 112, the wavelength conversion device 112 covers the light transmitting port 104, the laser 121 excites the wavelength conversion device 112, the excited wavelength conversion device 112 emits excited light 122, part of the excited light 122 is emitted from the second end 103 along the light transmitting port 104, and part of the excited light 122 is reflected by the inner wall of the light transmitting port 104 and then emitted from the second end 103. In this embodiment, the light-passing opening 104 extends from the first end 102 to the second end 103 of the light-guiding body 101, i.e. the light-guiding body 101 resembles a hollow cylinder. Therefore, when the wavelength conversion device 112 covers the first end 102, the received laser light 122 emitted by the wavelength conversion device 112 enters the light transmitting opening 104 from the first end 102, wherein a part of the received laser light 122 with a smaller light emitting angle can directly pass through the light transmitting opening 104 and be emitted from the light transmitting opening 104 at the second end 103 of the light guide 101, and a part of the received laser light 122 with a larger light emitting angle reaches the inner wall of the light transmitting opening 104, so as to avoid waste of light energy, a reflecting surface is arranged on the inner wall of the light transmitting opening 104, so that loss of the part of the received laser light 122 reflected by the reflecting surface in the reflecting process is reduced, and more of the received laser light 122 can be emitted from the light transmitting opening 104 at the second end 103. Since the wavelength conversion device 112 covers the first end 102, that is, the received laser light 122 enters the light transmitting port 104 from the first end 102, and the received laser light 122 exits from the light transmitting port 104 of the second end 103, the position of the wavelength conversion device 112 corresponding to the emitted received laser light 122 is changed. Moreover, since the aperture of the light-passing opening 104 at the first end 102 and the second end 103 can be changed as required, we can also change the substantial light-emitting area, so as to change the light intensity in unit area. Since the light guide 101 is made of a heat conductive material, when the wavelength conversion device 112 covers the first end 102 of the light guide 101, heat generated by the wavelength conversion device 112 during operation is transferred to the light guide 101, so as to increase the heat dissipation area of the wavelength conversion device 112, and further prevent the wavelength conversion device 112 from being damaged due to heat accumulation.

In this scheme, the length of the light guide 101 may be customized as needed, and for the convenience of changing the length, the light guide 101 may also be arranged in segments, that is, the light guide 101 is divided into multiple segments, and each segment may be fixed together by means of threads, splicing, bonding, and the like.

As can be seen from the optical principle, the smaller the light-emitting area is, the higher the light intensity per unit area is, when the light flux is constant. As shown in fig. 7, in order to increase the light intensity, it is preferable that the aperture of the light-passing port 104 is gradually reduced from the first end 102 to the second end 103. The presence of the light transmission port 104 corresponds to a change in the position and area of the light emitting surface of the wavelength conversion device 112 that emits the received laser light 122. Therefore, when the aperture of the light transmitting port 104 at the first end 102 is larger than the aperture of the light transmitting port 104 at the second end 103, the intensity of the received laser light 122 emitted from the light transmitting port 104 at the second end 103 is larger than the intensity of the received laser light 122 received by the light transmitting port 104 at the first end 102.

As shown in fig. 3, the light-scattering body 105 is covered on the second end 103, and the outer wall of the light-scattering body 105 is rough. The laser beam 122 emitted from the light-transmitting port 104 provided at the second end 103 is received by the transparent light scattering body 105, and since the outer wall of the light scattering body 105 is a rough surface, the laser beam 122 is scattered in the process of passing through the light scattering body 105 and emitting, and the emitting direction of the laser beam 122 is random, so that the laser beam 122 is more suitable for being used in cooperation with the light-reflecting cup 106. In this embodiment, the light scattering body 105 may be a transparent cylinder or a transparent circular truncated cone, but in order to ensure that the received laser light 122 can be emitted from the side wall of the light scattering body 105, it is preferable that the light scattering body 105 is a transparent cone or a transparent cone shell, the bottom surface of the transparent cone or the transparent cone shell is in close contact with the second end 103, and the side surface of the transparent cone or the transparent cone shell is a rough surface. Since the cone has only one bottom surface, and the received laser light 122 enters from the bottom surface and then exits from the side surface, the received laser light 122 can be ensured to exit from the side wall of the light scattering body 105 to the maximum extent, and therefore, the transparent cone or the transparent cone shell is selected to be used as the light scattering body 105. In order to avoid light leakage, the bottom surface of the transparent cone or the transparent cone shell needs to be tightly attached to the second end 103 to ensure that the light through opening 104 is completely covered.

In order to distribute the emitted light as required, as shown in fig. 4, the light guide body 101 further includes a light reflecting cup 106, the light reflecting cup 106 includes a light receiving opening 106a and a focal point, the second end 103 of the light guide body 101 passes through the light receiving opening 106a and enters the inside of the light reflecting cup 106, and the light scattering body 105 is located at the focal point. In the existing popular LED lamp, LED light sources are generally arranged on two opposite sides of a heat-conducting pillar, and the two LED light sources are fixed at the focus of a light-reflecting cup matched with the heat-conducting pillar through the heat-conducting pillar. However, since the LED light source emits lambertian light and the two light sources are located at two sides of the heat-conducting pillar, there are dark regions in the emitted light. In order to solve the problem, a light scattering body 105 is selected to scatter the excited light 122, so that the emitted light in the scheme does not have a dark region, but in order to distribute the emitted excited light 122 according to the requirement, a reflecting cup 106 is introduced in the scheme. The light scattering body 105 is fixed to the focal point of the reflection cup 106 by the light guide 101, so that the reflection cup 106 can better utilize the emitted received laser light 122.

In this embodiment, as shown in fig. 5 to 6, in order to facilitate the fixing and heat dissipation of the wavelength conversion device 112, it is preferable that a fixing stage 108 connected to the first end 102 is further included, the fixing stage 108 includes a through hole 108a, the through hole 108a is disposed around the wavelength conversion device 112, and the wavelength conversion device 112 is thermally connected to the fixing stage 108. In this embodiment, the wavelength conversion device 112 and the fixing stage 108 have two positional relationships, one is to fix the wavelength conversion device 112 in the through hole 108a, and then the received laser 122 emitted by the wavelength conversion device 112 enters the light-passing port 104 through the through hole 108 a; yet another way of fixing is that the wavelength conversion device 112 is fixedly arranged between the first end 102 and the second end 103, and the laser light 121 reaches the wavelength conversion device 112 through the through hole 108 a. Since the laser light 121 has a highly collimated characteristic, the laser light 121 has less light loss when passing through the through hole 108a, thereby reducing the waste of optical energy.

In this embodiment, the wavelength conversion device 112 is preferably a transmissive fluorescent sheet, that is, the wavelength conversion device 112 is composed of a transparent heat-conducting substrate and a fluorescent material coated on the transparent heat-conducting substrate. In consideration of cost, the volume of the wavelength conversion device 112 cannot be too large, and therefore it is difficult for the wavelength conversion device 112 to completely cover the light-passing opening 108a, and thus light leakage is inevitable. Therefore, in a modified mode, the wavelength conversion device 112 is located between the first end 102 and the second end 103, and a scattering reflective material 108b is filled between the wavelength conversion device 112 and the inner wall of the light through port 104.

In order to avoid light loss caused by the propagation of the received laser light 122 in the light transmitting port 104, the inner wall of the light transmitting port 104 is a reflecting surface. However, when the inner wall of the light-transmitting opening 104 is processed to be a reflecting surface, the number of processing steps is increased, and the cost is high. In another embodiment, a glass cylinder is disposed in the light admission port 104, the side wall of which is coated with a reflective material, said glass cylinder extending from the first end 102 to the second end 103. The glass cylinder processing cost is low, easily acquire, and it is lower to realize the degree of difficulty at the technology of glass cylinder surface coating reflecting material, consequently can choose for use the glass cylinder to place in logical light mouth 104, utilizes the glass cylinder outer wall that the coating has the reflecting material to replace the plane of reflection that leads to the inner wall setting of light mouth 104, plays the effect that the conduction receives laser 122.

We need to consider the fixing problem of the laser light source 111 after solving the fixing problem of the wavelength conversion device 112. Therefore, the light guide device further comprises a fixing base 109, one end of the fixing base 109 is connected with the fixing table 108, and the fixing base 109 fixedly arranged by the laser light source 111 is close to one end of the light guide body 101. The fixing base 109 is used for fixing the laser light source 111, and the side of the laser light source 111 emitting the laser light 121 faces the wavelength conversion device 112, so that the structure shortens the optical path of the laser light 121, reduces the volume of the light source, and prevents the problem that the laser light 121 cannot irradiate the wavelength conversion device 112 due to the displacement of the laser light source 111. In order to further reinforce the laser light source 111, one end of the fixing base 109 close to the light guide body 101 is recessed towards one end of the fixing base 109 far from the light guide body 101 to form a fixing groove 109a, the laser light source 111 is located in the fixing groove 109a, and a heat conduction silicon material is filled between the laser light source 111 and the fixing groove 109a, the laser light source 111 is placed in the fixing groove 109a, so that firstly, the volume of the whole device is reduced, the utilization rate of space is increased, secondly, the fixing of the laser light source 111 is facilitated, at the moment, the laser light source 111 can be fixed only by filling the heat conduction silicon material between the fixing groove 109a and the laser light source 111, and the heat conduction silicon material can transfer heat generated when the laser light source 111 works to the fixing base 109, so that the heat dissipation area is increased, and the laser light source 111 is prevented from being damaged due to heat accumulation.

As described above, the wavelength conversion device 112 converts the laser light 121 into the received laser light 122, the received laser light 122 is collected by the light-transmitting opening 104 of the light guide 101, and the inner wall of the light-transmitting opening 104 is a reflection surface, so that the light guide 101 can guide the received laser light 122 from the light-transmitting opening 104 of the first end 102 of the light guide 101 to the light-transmitting opening 104 of the second end 103 for emitting, and further change the final light-emitting position; the light guide body 101 is made of a heat conducting material, and the wavelength conversion device 112 covers the first end 102 of the light guide body 101, so that heat generated by the wavelength conversion device 112 when being excited by the laser 121 is transferred to the light guide body 101, and at the moment, the heat dissipation area of the wavelength conversion device 112 is increased, and the heat dissipation speed is increased; secondly, the aperture of the light-transmitting opening 104 of the second end 103 is controllable, so that the aperture of the light-transmitting opening 104 is reduced, more laser beams 122 are emitted from the focus of the light-reflecting cup 106, and the emitting light spots of the laser beams 122 are controllable.

Although several embodiments of the present invention have been described in detail, the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (10)

1. An archive lighting device comprising a laser light source emitting laser light, characterized in that: the light guide body is made of heat conducting materials and comprises a light through opening, the light through opening extends from the first end to the second end of the light guide body, and a reflecting surface is arranged on the inner wall of the light through opening;

the wavelength conversion device covers the light through opening, one side of the wavelength conversion device, which is far away from the light through opening, is excited by laser, the excited wavelength conversion device emits excited light, the excited light emits light towards the light through opening, and at least part of the excited light is emitted by the second end after being reflected by the reflecting surface.

2. An archive lighting device according to claim 1, characterized in that: the light scattering body covers the second end, and the outer wall of the light scattering body is a rough surface.

3. An archive lighting device according to claim 2, characterized in that: the light scattering body is a transparent cone or a transparent cone shell, the bottom surface of the transparent cone or the transparent cone shell is tightly attached to the second end, and the side surface of the transparent cone or the transparent cone shell is a rough surface.

4. An archive lighting device according to claim 2, characterized in that: the light guide body is arranged in the light guide body, and the light guide body is arranged in the light guide body.

5. An archive lighting device according to claim 1, characterized in that: still include the fixed station of being connected with first end, the fixed station covers logical light mouth, the fixed station includes the through-hole, the through-hole sets up around wavelength conversion device, wavelength conversion device and fixed station heat conduction are connected.

6. An archive lighting device according to claim 1, characterized in that: the wavelength conversion device is located between the first end and the second end.

7. An archive lighting device according to claim 5, characterized in that: still include unable adjustment base, unable adjustment base's one end is connected with the fixed station, the one end that the unable adjustment base that laser source was fixed to be set up is close to the light guide body.

8. An archive lighting device according to claim 7, characterized in that: one end of the fixing base close to the light guide body is sunken towards one end of the fixing base far away from the light guide body to form a fixing groove, the laser light source is positioned in the fixing groove, and heat conduction silicon is filled between the laser light source and the fixing groove.

9. An archive lighting device according to claim 1, characterized in that: the side of the laser light source emitting laser faces the wavelength conversion device.

10. An archive lighting device according to claim 1, characterized in that: the aperture of the light through port is gradually reduced from the first end to the second end.

Images