CN109654412B

CN109654412B - Passive illumination system with adjustable illumination and adjustment method

Info

Publication number: CN109654412B
Application number: CN201910090602.3A
Authority: CN
Inventors: 王守文; 黄晓云; 潘维超
Original assignee: Nanjing Chunhui Science & Technology Industrial Co ltd
Current assignee: Nanjing Chunhui Science & Technology Industrial Co ltd
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2023-05-30
Anticipated expiration: 2039-01-30
Also published as: CN109654412A

Abstract

The invention discloses a passive illumination system with adjustable illumination and an adjustment method, wherein the passive illumination system comprises at least one electric light source, an illumination optical fiber bundle corresponding to the electric light source, a feedback optical fiber bundle, an illumination system, a light-operated regulator and a light source controller; the electric light source is respectively connected with the illumination system and the light-operated regulator through the illumination fiber bundle, the light-operated regulator is connected with the light source controller through the feedback fiber bundle, and the light source controller is connected with the electric light source. The method and the device can transmit the electric light source in the active environment to the passive environment through the optical fiber to realize the passive illumination of the special environment, and can also realize the passive adjustment of the illumination system in the passive environment by utilizing the self-emitted light control illumination after the illumination system is started.

Description

Passive illumination system with adjustable illumination and adjustment method

Technical Field

The invention relates to the technical field of optical fiber illumination, in particular to a passive illumination system with adjustable illumination and an adjustment method.

Background

In some special environments, such as: the high-pressure oxygen bin cannot use active illumination, and only glass windows are arranged on the bulkhead for secondary lighting, so that the illumination effect is difficult to reach; although the active illumination can be arranged in a high-risk place with inflammability and explosiveness by adopting an explosion-proof measure, the active illumination is difficult to achieve a required illumination effect, the existence of a power supply becomes a great potential safety hazard, and once the explosion-proof measure is weakened, fire and explosion are most likely to be caused; cultural relics or libraries, paper or fiber are easy to be weathered or changed in property in a temperature-changing environment, and heat is generated by illumination of an electric light source, so that the fiber or paper is not easy to preserve.

The optical fiber illumination is uncharged, does not generate heat during illumination, has high safety, can transmit a light source to any area through the transmission of an optical fiber conductor, and is a high-tech illumination technology which is emerging in recent years. In the prior art, optical fiber illumination is adopted to replace active illumination to be applied to special environments, for example, chinese patent CN102980038B discloses a passive illumination system and an implementation method, and the passive illumination system can be used for illumination of special environments. Chinese patent CN2637899Y discloses an illumination system for use in hyperbaric oxygen chambers, which can be used for illumination of hyperbaric oxygen chambers. However, the above passive illumination methods do not involve a passive illumination control method, and the conventional illumination control methods are all required to be performed under active conditions, which is extremely inconvenient for the use of the passive illumination system.

Disclosure of Invention

The invention provides a passive illumination system with adjustable illumination and an adjusting method, which can realize passive illumination and passively adjust the illumination.

The first technical scheme adopted by the invention is as follows: a passive lighting system with adjustable illumination comprising: at least one electric light source B, an illumination optical fiber bundle, a feedback optical fiber bundle, an illumination system, a light-operated regulator and a light source controller; the light source B is connected with the light control regulator through the illumination optical fiber bundle, the light control regulator is connected with the light source controller through the feedback optical fiber bundle, and the light source controller is connected with the light source;

the electric light source is arranged outside the passive environment and is used for generating light;

the light source controller is arranged outside the passive environment and is close to the electric light source, and is used for receiving light returned by the feedback optical fiber bundle, converting an input optical signal into an electric signal and then transmitting the electric signal to the electric light source, and adjusting the brightness of the electric light source according to the size of the input optical signal;

the illumination optical fiber bundles are arranged in one-to-one correspondence with the electric light sources and are used for respectively transmitting light emitted by the electric light sources to the illumination system and the light-operated regulator;

the feedback optical fiber bundle is used for transmitting the light fed back by the light-operated regulator to the light source controller;

the light-operated regulator is arranged in the passive environment and comprises a diffuse reflection plate and a reset diaphragm; the diffuse reflection plate is used for reflecting the light transmitted by the illumination optical fiber to the feedback optical fiber, and the reset diaphragm is used for controlling the luminous flux reflected by the diffuse reflection plate;

the illumination system is arranged in the passive environment and comprises a plurality of optical fiber lenses for illumination of the passive environment.

The second technical scheme adopted by the invention is an improvement on the first technical scheme, and the second technical scheme adopted by the invention is as follows: one end of the illumination optical fiber is connected with the electric light source, one end of the feedback optical fiber is connected with the light source controller, the other ends of the illumination optical fiber and the feedback optical fiber are integrated into a bundle through the optical fiber integration piece and then enter a passive environment, and the bundle is equally divided into a plurality of branches through the optical fiber equally dividing piece, wherein one branch A comprises all the feedback optical fibers and part of the illumination optical fibers from one electric light source B; each branched illumination optical fiber bundle is coupled and connected with an optical fiber lens of an illumination system; branch a is coupled to the photocontrol regulator. The illumination optical fiber bundles are evenly divided into a plurality of branches after entering the active environment, and can be configured at will according to the use requirement of the illumination environment, so that the position and the size of an illumination area can be flexibly adjusted.

The third technical scheme adopted by the invention is an improvement on the second technical scheme, and the third technical scheme adopted by the invention is as follows: the length difference delta L of any two branch optical fiber bundles is less than or equal to 15mm. The length difference of each branch optical fiber bundle is too large, so that the illuminance difference of the optical fiber lenses distributed to each illumination point is large, which is not beneficial to the uniform and separate illuminance in one illumination area and affects the illumination effect.

The fourth technical scheme adopted by the invention is an improvement on the second technical scheme, and the fourth technical scheme adopted by the invention is as follows: the optical fiber lens comprises a first lens and a second lens; the first lens is coupled with each illuminating optical fiber bundle and is used for converting light transmitted by the optical fiber bundles into parallel light to be emitted; the second lens receives the parallel light emitted by the first lens, two groups of parallel light are arranged to focus the received two parallel light beams into a light spot, and the distance between the light spot and the light emitting surface of the second lens can be adjusted by adjusting the distance between the lenses in the second lens, wherein the distance is 1-3 meters. In some special occasions, local brightness needs to be increased, two parallel light beams are converted into a single light spot through the matching of the first lens and the second lens and the design of two groups of the second lens, local illumination can be increased, and the distance between converging light spots can be adjusted by adjusting the distance between lenses in the second lens, so that the lens is convenient to use.

The fifth technical scheme adopted by the invention is an improvement on the second technical scheme, and the fifth technical scheme adopted by the invention is as follows: the quantity ratio of the illumination optical fiber to the feedback optical fiber in the branch A is as follows: 1/2-3/5: 1. the purpose of controlling the ratio of the illumination optical fiber to the feedback optical fiber is to better ensure the reflection effect of the diffuse reflection plate and ensure the adjustment effect of the light-operated regulator.

The sixth technical scheme adopted by the invention is an improvement on the fifth technical scheme, and the sixth technical scheme adopted by the invention is as follows: the feedback fibers in the branch A are uniformly dispersed in the illumination fibers. Further improving the sensitivity of the photocontrol regulator.

The seventh technical scheme adopted by the invention is an improvement on the first or second technical scheme, and the seventh technical scheme adopted by the invention is as follows: the light-operated regulator also comprises an optical fiber connecting piece and an adjusting knob; the central part of the optical fiber connecting piece is axially and sequentially provided with an optical fiber mounting hole, a diaphragm mounting hole and a diffuse reflection plate mounting hole, and the optical fiber bundle of the branch A extends into the optical fiber mounting hole, the end face of the optical fiber bundle of the branch A is flush with the end face of the optical fiber connecting piece and is close to the reset diaphragm; the reset diaphragm is arranged in the diaphragm mounting hole through a diaphragm seat thereof; the diffuse reflection plate is embedded in the adjusting knob, and the outer side surface of the diffuse reflection plate is close to the reset diaphragm; one end of the diffuse reflection plate is inlaid in the adjusting knob, inserted into the diffuse reflection plate mounting hole and connected with the reset diaphragm turntable, and the diaphragm aperture of the reset diaphragm is adjusted by rotating the adjusting knob. The light-operated regulator has simple structure and convenient use.

The eighth technical scheme adopted by the invention is an improvement on the seventh technical scheme, and the eighth technical scheme adopted by the invention is as follows: the central part of adjust knob has axially been run through and has been seted up the initial unthreaded hole, and diffuse reflection board's central axial has been run through and has been seted up the logical unthreaded hole, the hole central line coincidence of logical unthreaded hole and reset diaphragm. Natural light in the active environment enters the light-operated regulator through the primary light hole, and after being transmitted to the light source controller through the feedback optical fiber bundle, the light source can be started under the passive condition, and the lighting system is started.

The ninth technical scheme adopted by the invention is an improvement on the eighth technical scheme, and the ninth technical scheme adopted by the invention is as follows: the numerical aperture of the optical fiber bundle of the branch A is d, the diaphragm aperture of the reset diaphragm is smaller than d, and the aperture of the primary light hole is smaller than or equal to 1/2d and larger than the aperture of the light passing hole. The proportional relation of the aperture of each hole is limited, and the adjusting sensitivity of the light-operated adjuster is further improved. The aperture of the primary light hole is limited to control the luminous flux of the external light entering the feedback optical fiber, so that the adjusting proportion of the external light to the light source is lower than 1%, and the control performance of the feedback light is not affected.

The tenth technical scheme adopted by the invention is as follows: a method of adjusting illuminance of a passive illumination system, comprising the steps of:

step one, one end of an illumination optical fiber bundle is coupled with an electric light source, one end of a feedback optical fiber bundle is coupled with a light source controller, and the light source controller is connected with the electric light source B through a wire;

integrating the other ends of the illumination optical fiber bundle and the feedback optical fiber bundle into a bundle, and then entering a passive environment;

dividing the optical fiber integrated into a bundle into a plurality of branches in a passive environment, wherein one branch A comprises all feedback optical fibers and part of illumination optical fibers from an electric light source B, each branched illumination optical fiber bundle is respectively connected with each optical fiber lens in a coupling way, and each branch A is connected with a light-operated regulator in a coupling way;

distributing each optical fiber lens to required illumination points, and adjusting illumination angles to enable all light spots to be converged in a designated illumination area;

step five, after the electric light source is started, the illumination is regulated by regulating the aperture of a reset diaphragm in the light-operated regulator, when the required illumination is higher, the aperture of the reset diaphragm is regulated to be larger, the luminous flux reflected by the diffuse reflection plate is increased, the light signal transmitted to the light source controller by the feedback optical fiber is enhanced, the light source controller controls the electric light source B to increase the brightness, and simultaneously, all the light sources are controlled to be brightened in a linkage way, and the illumination of an illumination area is increased; when the required illumination is low, the aperture of the reset diaphragm is reduced, the luminous flux reflected by the diffuse reflection plate is reduced, the light signal transmitted to the light source controller by the feedback optical fiber is weakened, the light source controller controls the electric light source B to reduce the brightness, and meanwhile, all the light sources are controlled in a linkage way to reduce the brightness, so that the illumination of an illumination area is reduced.

The invention has the beneficial effects that:

1. according to the method and the device, the electric light source in the active environment can be transmitted into the passive environment through the optical fiber, so that the passive illumination of the special environment is realized.

2. The passive regulation of the illumination system under the passive environment can be realized through the application, the illumination system is started and then uses the self-emitted light to control the illumination, and the illumination regulation is safe and convenient.

Drawings

Fig. 1 is a schematic diagram of the configuration of embodiment 1 of the passive illumination system of the present invention, in which the direction indicated by the arrow is the light transmission direction.

Fig. 2 is a schematic cross-sectional view of a branched fiber optic bundle of embodiment 1 of the passive illumination system of the present invention.

Fig. 3 is a schematic diagram showing the installation structure of the light control regulator according to embodiment 1 of the passive illumination system of the present invention.

Fig. 4 is a schematic structural view of an optical fiber connector of the photocontrol regulator of embodiment 1 of the passive illumination system of the present invention.

Fig. 5 is a schematic diagram of the structure of an optical fiber integrated unit according to embodiment 1 of the passive illumination system of the present invention.

Fig. 6 is a schematic structural view of an optical fiber integrated unit one of embodiment 1 of the passive illumination system of the present invention, fig. 6 (a) is a front view, and fig. 6 (b) is a cross-sectional view A-A of fig. 6 (a).

Fig. 7 is a schematic diagram of the structure of a second optical fiber integrated unit in embodiment 1 of the passive illumination system according to the present invention.

Fig. 8 is a schematic diagram of the structure of an optical fiber dividing member in embodiment 1 of the passive illumination system of the present invention.

Fig. 9 is a schematic structural view of an integrated component one of optical fiber unification pieces in embodiment 1 of the passive illumination system of the present invention, fig. 9 (a) is a front view, and fig. 9 (B) is a B-B cross-sectional view of fig. 9 (a).

Fig. 10 is a schematic diagram of the structure of an integrated component two of the optical fiber uniformity component of embodiment 1 of the passive illumination system of the present invention.

Fig. 11 is a schematic structural view of an optical fiber terminal according to embodiment 1 of the passive illumination system of the present invention.

Fig. 12 is a schematic diagram showing a connection structure between an optical fiber terminal and an optical fiber in embodiment 1 of the passive illumination system of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings and a preferred embodiment.

Embodiment 1 further illustrates the technical scheme of the present invention by taking an illumination system suitable for a hyperbaric oxygen chamber as an example.

Referring to fig. 1, the hyperbaric oxygen chamber illumination system includes: two electric light sources 1, a light source controller 2, two illumination optical fiber bundles 3, a feedback optical fiber bundle 4, a plurality of optical fiber lenses 11 and a light control regulator 20.

In this embodiment, an LED lamp is used as the electric light source 1, and the power thereof is adjustable at 80W. The LED lamp is in the prior art, and the structure and the function of the LED lamp are shown in ISSN of Z1 stage of a life science instrument Life Science Instruments 2018: 1671-7929 are described in detail herein. An optical fiber socket and an interface connected with a light source controller are arranged in the LED lamp. Two electric light sources are fixed outside the high-pressure oxygen bin 5, and the first electric light source and the second electric light source are connected through a wire; a light source controller 2 is installed near the first electric light source and is connected with the two electric light sources respectively through leads. The light source controller is a prior art, and in this embodiment, an AOKace brand AGS100 endoscope cold light source controller is selected.

The illumination fiber bundles 3 are composed of a plurality of multi-component glass fibers, and the quantity of the fiber filaments contained in each fiber bundle is selected according to illumination required by illumination. A plurality of optical fibers are integrated into a bundle, then a metal sheath is sleeved outside the bundle to form an optical cable, and the end part of the optical cable is crimped with an optical fiber end 3-1. Referring to fig. 11 and 12, the optical fiber end 3-1 is a sleeve with a stepped through hole inside, the optical fiber bundle is inserted from the large end of the optical fiber end, the optical fiber bundle and the optical fiber end are connected in a cold pressing mode, the sleeve of the optical fiber bundle extends to the large hole of the stepped hole of the optical fiber end, and the optical fiber bundle extends to the end face of the small hole to be level with the optical fiber end. The two illumination optical fiber bundles 3 are respectively and directly coupled with the first electric light source and the second electric light source through the optical fiber end heads 3-1, in the embodiment, the small ends of the optical fiber end heads 3-1 are inserted into the optical fiber sockets of the LED lamps, and the distance between the end faces of the optical fibers and the luminous bodies of the light sources is less than 1mm. A better coupling effect can be achieved by limiting the distance between the two.

The structure of the feedback fiber bundle 4 is the same as the illumination fiber bundle, except that the amount of filaments in the feedback fiber bundle is small, specifically selected according to the magnitude of illuminance required to activate the light source controller. In this embodiment, the illuminance of the start light source controller is greater than 10Lx. The end of the feedback optical fiber bundle 4 is crimped with the optical fiber end 4-1, and the structure of the optical fiber end 4-1 and the connection method with the feedback optical fiber are the same as those of the illumination optical fiber bundle, and the description thereof is omitted. The fiber end 4-1 of the feedback fiber is connected to the light source controller 2.

Referring to fig. 5 to 7, in the present embodiment, the optical fiber integrated part 6 includes an integrated part one 61 and an integrated part two 62. The first integrated part 61 is a cylindrical integrated block with three through holes inside, the two large hole diameters of the cylindrical integrated block are matched with the optical fiber diameter of the illumination optical fiber bundle 1, and the small hole diameters of the cylindrical integrated block are matched with the optical fiber diameter of the feedback optical fiber bundle 2. The second integrated piece 62 is in a stepped cylindrical shape, the large end is provided with an outer shaft shoulder, the small end is provided with an outer thread, the central part of the second integrated piece is axially provided with a stepped through hole, the large hole diameter and the hole depth of the stepped through hole are matched with the outer diameter and the length of the first integrated piece, and the small hole diameter is matched with the quantity of the illumination optical fiber bundle and the feedback optical fiber bundle. The other ends of the two illumination optical fiber bundles 3 and the one feedback optical fiber bundle 4 are pulled to the high-pressure oxygen bin respectively, so that optical fibers of the two illumination optical fiber bundles pass through three through holes of the first optical fiber integration piece 61, then pass through the step through holes of the second optical fiber integration piece 62, press the first optical fiber integration piece 61 into the large holes of the step through holes of the second optical fiber integration piece 62, and the integrated connection of the illumination optical fiber bundle 3 and the feedback optical fiber bundle 2 is completed. The bulkhead of the hyperbaric oxygen chamber 5 is provided with a hole, the optical fiber integrated piece 6 is penetrated in the hole, the outer shaft shoulder of the integrated piece II 62 is abutted against the inner surface of the bulkhead, the nut is screwed into the small end of the integrated piece II, and the integrated piece II is locked on the bulkhead 5 through the cooperation of the nut and the outer shaft shoulder. The outer layer of the integrated total optical fiber bundle 7 is sleeved with a sheath, and the joint of the optical fiber integrated piece 6 and the bulkhead is sealed by sealant.

The total optical fiber bundle 7 integrated into one bundle is pulled to the illumination system and is divided into a plurality of branches by the optical fiber dividing part 8. Referring to fig. 8 to 10, in the present embodiment, the optical fiber dividing member 8 includes a dividing member one 81 and a dividing member two 82. The first dividing element 81 is a cylindrical integrated block with seven through holes inside, and the apertures of the seven through holes are equal and are matched with one seventh of the filament quantity of the total optical fiber bundle 7. The second equally dividing member 62 is cylindrical, a stepped through hole is axially arranged in the center of the second equally dividing member, the large hole diameter and the hole depth of the stepped through hole are matched with the outer diameter and the length of the first equally dividing member 81, and the small hole diameter is matched with the quantity of the total optical fiber bundle 7. All the optical fibers of the total optical fiber bundle 7 are made to pass through the stepped through holes of the dividing member two 82 and then divided into seven parts by a wire dividing machine, one of which contains all the feedback optical fibers. The yarn dividing machine and the yarn dividing method thereof are the prior art, and the structure and the working principle thereof are not repeated here. The optical fiber wires after the uniform division pass through the seven through holes of the uniform division part I81 respectively, the optical fiber uniform division part I81 is pressed into the large holes of the stepped through holes of the optical fiber uniform division part II 82, and the uniform division of the optical fibers is completed. As shown in fig. 1, in the present embodiment, the optical fiber is divided into seven branch optical fiber bundles 9 in total, and the optical fiber length difference between the longest branch optical fiber bundle and the shortest branch optical fiber bundle is Δl=l1-l7=15 mm. The optical fibers of the feedback optical fiber bundle 2 are all contained in the branch optical fiber bundle 9-1, the branch optical fiber bundle 9-1 also contains part of illumination optical fibers connected with the first electric light source, the quantity of the feedback optical fibers in the branch optical fiber bundle 9-1 is equal to that of the illumination optical fibers, and the feedback optical fibers are uniformly dispersed in the illumination optical fibers. The optical fiber ends 3-2 are respectively pressed at the tail ends of the branched optical fiber bundles 9, and the optical fiber ends 3-2 and the optical fiber ends 3-1 have the same structure and only have smaller diameter. The crimping method is also the same and will not be described here again. Referring to fig. 2, the branched optical fiber 9 has a numerical aperture d.

Referring to fig. 1, in the present embodiment, the illumination system in the hyperbaric oxygen chamber includes six sets of fiber lenses 11, two sets forming one illumination point. Each set of fiber lenses includes a first lens and a second lens. The first lens and the second lens are both in the prior art, and the structure and the working principle thereof are not described herein. The first lens is directly coupled and connected with the branched optical fiber bundle 9 through the optical fiber end head 3-2, and the distance between the optical fiber end face and the lens luminous surface is controlled to be smaller than 1mm. The first lens converts the received light into parallel light and emits the parallel light. The second lens is connected with the first lens, and two parallel lights emitted by the received first lens are converged into one light spot. The second lens is a telescopic lens and comprises a fixing part and a sliding part, lens groups are respectively arranged in the fixing part and the sliding part, and the distance between the two lens groups is adjusted by adjusting the distance between the fixing part and the sliding part, so that the distance between converging light spots of the two lenses is adjusted. In this embodiment, the distance between the converging light spots and the light emitting surface of the lens can be adjusted to 1-3 meters.

Referring to fig. 3 and 4, in the present embodiment, the light control adjuster 20 includes an optical fiber connector 21, a diffuse reflection plate 22, a reset diaphragm 23, and an adjusting knob 24. The central part of the optical fiber connector 21 is axially provided with an optical fiber mounting hole, a diaphragm mounting hole and a diffuse reflection plate mounting hole which are communicated with each other in sequence, one end of the outer peripheral surface of the optical fiber connector 21 is provided with an external thread, and the other end is provided with a stop shoulder. The reset diaphragm is in the prior art, the diaphragm aperture of the reset diaphragm can be automatically reset after being instantaneously increased or reduced, and the maximum value of the diaphragm aperture of the reset diaphragm is smaller than the numerical aperture d of the branch optical fiber 9-1. The reset diaphragm 23 is disposed in the diaphragm mounting hole through its diaphragm seat. One end of the adjusting knob is axially provided with a counter bore, and the diffuse reflection plate is embedded in the counter bore, and the outer side surface of the diffuse reflection plate is flush with the end surface of the adjusting knob. One end of the diffuse reflection plate embedded with the adjusting knob is inserted into the diffuse reflection plate mounting hole and is connected with the turntable of the resetting diaphragm through a screw, the optical fiber bundle of the branch optical fiber bundle 9-1 stretches into the optical fiber mounting hole, the end face of the optical fiber bundle is flush with the end face of the optical fiber connecting piece 21, and the outer side face of the diffuse reflection plate 23 is close to the resetting diaphragm 23. The light-operated regulator 20 is arranged in the hyperbaric oxygen chamber 5 through the fixing plate 51, the stop shoulder of the optical fiber connecting piece is abutted against the fixing plate 51, the nut is screwed into the other side of the fixing plate, the optical fiber connecting piece is fixed through the nut and the stop shoulder, the adjusting knob 24 is rotated, and the rotary disc of the reset diaphragm 23 is stirred through the screw, so that the aperture of the diaphragm is adjusted. The central part axial of diffuse reflection board is equipped with logical unthreaded hole, and adjust knob's central part axial link up has seted up the just unthreaded hole, and just the aperture in just unthreaded hole is greater than the aperture in logical unthreaded hole for 1/2 d. The hole center lines of the primary light hole, the light passing hole and the reset diaphragm are coincident.

Embodiment 2

Taking the passive illumination system described in embodiment 1 as an example, the illuminance adjustment method of the present invention is further described in detail, and includes the steps of:

step one, installing an electric light source I and an electric light source II outside a hyperbaric oxygen chamber 5, connecting the two electric light sources through a data line, installing a light source controller 2 near the electric light source I, and connecting the light source controller 2 with the electric light source I through a lead; one end of each of the two illumination optical fiber bundles 3 is respectively coupled with the first electric light source and the second electric light source through the optical fiber terminal 3-1, and one end of the feedback optical fiber bundle 4 is coupled with the light source controller 2 through the optical fiber terminal 3-1;

step two, the other ends of the illumination optical fiber bundle 3 and the feedback optical fiber bundle 4 are pulled to the high-pressure oxygen bin 5, and are integrated into a bundle through the optical fiber integration piece 5 and then enter the high-pressure oxygen bin 5;

dividing the optical fibers 7 integrated into a bundle into seven branch optical fiber bundles 9 by an optical fiber dividing part 8 in the hyperbaric oxygen chamber 5, wherein one branch 9-1 comprises all feedback optical fibers and part of illumination optical fibers from an electric light source I, wherein the quantity of the illumination optical fibers is equal to that of the feedback optical fibers; each illumination optical fiber bundle 9 is coupled and connected with each optical fiber lens 11 through an optical fiber terminal 3-2, and each branch 9-1 is coupled and connected with the light-operated regulator 20;

step four, distributing the optical fiber lenses 11 to required illumination points, wherein two optical fiber lenses are in a group; adjusting the illumination angles of the lenses to enable all light spots to be converged in a designated illumination area; adjusting the interval between the two lens groups in the second lens to enable the light spots of the two lenses to be converged into one and at a specified distance;

step five, starting the first electric light source through the primary light hole, and starting the second electric light source in a linkage way; the illumination is regulated by regulating the aperture of a reset aperture 23 in the light-operated regulator 20 after the electric light source is started, when the required illumination is higher, the aperture of the reset aperture is regulated, the luminous flux reflected by the diffuse reflection plate 22 is increased, the light signal transmitted to the light source controller 2 by the feedback optical fiber 4 is enhanced, the light source controller 2 controls the electric light source to increase the brightness, and simultaneously, the electric light source is driven to increase the brightness in a linkage way, so that the illumination of an illumination area is increased; when the required illumination is low, the aperture of the reset diaphragm is reduced, the luminous flux reflected by the diffuse reflection plate 22 is reduced, the light signal transmitted to the light source controller 2 by the feedback optical fiber 4 is weakened, the light source controller 2 controls the first electric light source to reduce the brightness, and meanwhile, the second electric light source is driven in a linkage way to reduce the brightness, so that the illumination of an illumination area is reduced.

Parts of the above description not specifically described are either prior art or may be implemented by prior art.

Claims

1. A passive lighting system with adjustable illumination, comprising: at least one electric light source, an illumination fiber bundle, a feedback fiber bundle, an illumination system, a light control regulator and a light source controller; the light source is connected with the illumination system through an illumination optical fiber bundle, the light source is connected with the light-operated regulator through the illumination optical fiber bundle, the light-operated regulator is connected with the light source controller through a feedback optical fiber bundle, and the light source controller is connected with the light source;

the electric light source is arranged outside the passive environment and is used for generating light; more than two electric light sources are connected through wires;

the light-operated regulator is arranged in the passive environment and comprises a diffuse reflection plate and a reset diaphragm; the diffuse reflection plate is used for reflecting the light transmitted by the illumination optical fiber to the feedback optical fiber, and the reset diaphragm is used for controlling the luminous flux reflected by the diffuse reflection plate; the light-operated regulator also comprises an optical fiber connecting piece and an adjusting knob; the central part of the optical fiber connecting piece is axially provided with an optical fiber mounting hole, a diaphragm mounting hole and a diffuse reflection plate mounting hole in sequence, and the reset diaphragm is arranged in the diaphragm mounting hole through a diaphragm seat thereof; the diffuse reflection plate is embedded in the adjusting knob, and the outer side surface of the diffuse reflection plate is close to the reset diaphragm; one end of the adjusting knob inlaid with the diffuse reflection plate is inserted into the diffuse reflection plate mounting hole and is connected with the reset diaphragm turntable, and the aperture of the reset diaphragm is adjusted by rotating the adjusting knob;

2. The passive illumination system of claim 1, wherein one end of the illumination fiber is connected with the electric light source, one end of the feedback fiber is connected with the light source controller, the other ends of the illumination fiber and the feedback fiber are integrated into a bundle through the fiber integration piece and then enter the passive environment, and the bundle is divided into a plurality of branches through the fiber dividing piece, wherein one branch A comprises all the feedback fibers and part of the illumination fiber from one electric light source; each branched illumination optical fiber bundle is coupled and connected with an optical fiber lens of an illumination system; branch a is coupled to the photocontrol regulator.

3. The passive illumination system of claim 2, wherein the difference in length Δl of any two branched fiber bundles is 15mm or less.

4. The passive illumination system of claim 2, wherein the fiber optic lens comprises a first lens and a second lens; the first lens is coupled with each illuminating optical fiber bundle and is used for converting light transmitted by the optical fiber bundles into parallel light to be emitted; the second lens receives the parallel light emitted by the first lens, two groups of parallel light are arranged to focus the received two parallel light beams into a light spot, the distance between the light spot and the light emitting surface of the second lens can be adjusted by adjusting the distance between the lenses in the second lens, and the distance range is 1-3 meters.

5. The passive illumination system of claim 2, wherein the feedback fibers in branch a are uniformly dispersed in the illumination fibers.

6. The passive illumination system of claim 2, wherein the fiber bundle of branch a extends into the fiber mounting hole with an end surface flush with the end surface of the fiber optic connector and proximate the reset stop.

7. The passive lighting system of claim 2, wherein the central portion of the adjusting knob is provided with a primary light hole in an axial direction, the center of the diffuse reflection plate is provided with a light passing hole in an axial direction, and hole center lines of the primary light hole, the light passing hole and the reset diaphragm are coincident.

8. The passive illumination system of claim 7, wherein the optical fiber bundle of branch a has a numerical aperture d, the stop aperture of the reset stop < d, and the aperture of the primary aperture is less than or equal to 1/2d and greater than the aperture of the pass aperture.

9. The illuminance adjustment method of a passive illumination system according to any one of claims 1 to 8, comprising the steps of:

step one, one end of an illumination optical fiber bundle is coupled with an electric light source, one end of a feedback optical fiber bundle is coupled with a light source controller, and the light source controller is connected with the electric light source through a wire;

dividing the optical fiber integrated into a bundle into a plurality of branches in a passive environment, wherein one branch A comprises all feedback optical fibers and part of illumination optical fibers from an electric light source, each branched illumination optical fiber bundle is respectively connected with each optical fiber lens in a coupling way, and each branch A is connected with a light-operated regulator in a coupling way;

step five, after the electric light source is started, the illumination is regulated by regulating the aperture of a reset diaphragm in the light-operated regulator, when the required illumination is higher, the aperture of the reset diaphragm is regulated to be larger, the luminous flux reflected by the diffuse reflection plate is increased, the light signal transmitted to the light source controller by the feedback optical fiber is enhanced, the light source controller controls the electric light source to increase the brightness, and simultaneously, all the light sources are controlled to increase the brightness in a linkage way, and the illumination of an illumination area is increased; when the required illumination is low, the aperture of the reset diaphragm is reduced, the luminous flux reflected by the diffuse reflection plate is reduced, the light signal transmitted to the light source controller by the feedback optical fiber is weakened, the light source controller controls the electric light source to reduce the brightness, and simultaneously, all the light sources are controlled in a linkage way to reduce the brightness, so that the illumination in the illumination area is reduced.