CN109802293A - A kind of external instruction light of laser safely introduces system and method - Google Patents
A kind of external instruction light of laser safely introduces system and method Download PDFInfo
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- CN109802293A CN109802293A CN201910185214.3A CN201910185214A CN109802293A CN 109802293 A CN109802293 A CN 109802293A CN 201910185214 A CN201910185214 A CN 201910185214A CN 109802293 A CN109802293 A CN 109802293A
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Abstract
System and method is safely introduced the present invention relates to a kind of external instruction light of laser.The system includes instruction radiant, the first reflecting mirror, lens group, the second reflecting mirror, light path switching component and optical path switching alarm device；The instruction light for indicating that radiant is launched successively passes through the first reflecting mirror, lens group, the second reflecting mirror；The main laser of instruction light and laser through the reflection of the second reflecting mirror is coaxial, the same to angle of divergence；Second reflecting mirror can cut or cut out main laser optical path under the action of light path switching component；Optical path switching alarm device is arranged in the instruction light optical path after the reflection of the first reflecting mirror, and is located at after the second reflecting mirror.By lens group and total reflective mirror will indicate light is introduced into main laser optical path, simultaneously configuration instruction light switching alarm device, indicate optical output power it is adjustable and with main laser is coaxial, the same to angle of divergence, it not only increases the locating effect of instruction light, reduce maintenance difficulty and cost, while also eliminating due to system failure bring security risk.
Description
Technical field
The invention belongs to Laser semi-guiding field, be related to a kind of external instruction light of laser safely introduces system and side
Method.
Background technique
The advantages that laser is due to its high directionality, high brightness has obtained answering extensively in industrial processes and high-technology field
With, however the fuel factor of laser, biohazard and secondary radiation harm etc. can not be ignored.International Electrotechnical Commission (I EC
60825-1) by optical maser wavelength, output power/energy, pulsewidth etc., laser is divided into several security levels, to distinguish its danger
The item etc. that evil degree and user should be noted.
The directly harm that laser constitutes human body and working environment is main including direct light, reflected light, diffusion light etc.,
For invisible laser be especially in high-power invisible laser, indicate that the effect of light is particularly important.
Usual way is that the visible waveband coaxially exported with main laser is integrated in laser in laser development process
Instruction (or beacon, collimation) light source.Instruction light is generally coupled in main laser optical path using conjunction beam mode, inside stimulated light device
The limitation in space etc., instruction radiant output power usually will not be too high, encounters complex optical path, anti-by a large amount of optical elements
Indicate that light visual effect is deteriorated, and is unfavorable for auxiliary positioning and security protection after penetrating, transmiting.In addition, since individual laser package is integrated
Degree is higher, after instruction radiant breaks down, it is often necessary to return factory's maintenance, increase maintenance difficulty and cost.
Existing external instruction radiant is mainly introduced by closing beam mode, and light combination mirror or coupler are in main laser optical path
In, wavelength transmission/reflection characteristic of pairing beam device, anti-laser damage performance etc. propose requirement, to a certain extent not
Conducive to the security implementation of Laser Experiments especially light laser experiment.
Summary of the invention
In order to solve the problems, such as background technique, the present invention provides a kind of external instruction light of laser to safely introduce
System and method is introduced into main laser optical path and is configured using external visible laser as instruction light by lens group and total reflective mirror
Indicate light switching alarm device, instruction optical output power is adjustable and with main laser is coaxial, the same to angle of divergence, system is simple, easy to operate, mentions
The high locating effect of instruction light reduces maintenance difficulty and cost, while also eliminating due to system failure bring safety
Hidden danger.
Basic Design thinking of the invention is:
It indicates that radiant is used to provide and indicates that the light source of light is the continuous-wave laser of visible light wave range, power adjustable；Refer to
Show that light successively passes through the first reflecting mirror, lens group, the second reflecting mirror and is overlapped with the main laser of laser, by adjusting the first reflection
Mirror, two-mirror realize that instruction light and main laser are coaxial, make to indicate light and the same angle of divergence of main laser by adjusting lens group.Its
In, the second reflecting mirror, which is installed on, is convenient to carry out main laser with the handover operation for indicating light optical path, again on light path switching component
Position precision is high；After switching, the second reflecting mirror and its mirror holder do not block main laser, while indicating that light is incident to optical path switching alarm device
On detector photosurface.Operator can judge the switching feelings of instruction light and main laser optical path according to alarm device LED status
Condition is eliminated because instruction light introduces system due to maloperation caused by failure, improves safety.
The technology of the present invention solution is:
A kind of external instruction light of laser safely introduces system, including instruction radiant, the first reflecting mirror, lens group, the
Two-mirror, light path switching component and optical path switching alarm device；
The instruction light for indicating that radiant is launched successively passes through the first reflecting mirror, lens group, the second reflecting mirror, anti-through second
The main laser for penetrating instruction light and the laser of mirror reflection is coaxial, the same to angle of divergence；
Second reflecting mirror is mounted on light path switching component, and the second reflecting mirror can be cut under the action of light path switching component
Enter or cut out main laser optical path；
Optical path switching alarm device is arranged in the instruction light optical path after the reflection of the first reflecting mirror, and is located at the second reflecting mirror
Later.
Further, above-mentioned instruction radiant is using visible light wave range and the continuous-wave laser of power adjustable.
Further, above-mentioned light path switching component is one-dimensional automatically controlled displacement platform or optical path switcher.
Further, above-mentioned optical path switching alarm device include optical filter, optical detector, comparator, relay, warning light and
Power supply；
Before optical filter is installed on optical detector, for filtering other incident lights other than indicating light；
Power supply is connect with relay and warning light respectively；
Comparator is outputed voltage signal to by optical detector after optical detector reception instruction light, comparator exports TTL electricity
It puts down to relay, warning light is lighted by trigger relay.
System is safely introduced based on the external instruction light of above-mentioned laser, now the system carries out indicating that light safely introduces to use
Method be described, specifically includes the following steps:
1) it is adjusted with optical axis
1.1) an adjustable diaphragm is respectively placed near field, the far field of the main laser optical path of laser emitting, adjusts tunable optical
The position of door screen and diameter, make the main laser optical path of laser while passing through two adjustable diaphragm centers；
1.2) instruction radiant, the first reflecting mirror, the second reflecting mirror are successively put；
1.3) open instruction radiant, by adjusting the position of the first reflecting mirror, the second reflecting mirror, making to indicate light while leading to
Two adjustable diaphragm centers are crossed, so that instruction light and main laser are coaxial；
2) it is adjusted with the angle of divergence
2.1) beam splitter (10) are placed in the instruction light optical path reflected through the second reflecting mirror, on the transmitted light path of beam splitter
Third reflecting mirror, the 4th reflecting mirror and the 5th reflecting mirror are placed, places diffuse reflecting screen on the reflected light path of beam splitter；Wherein,
The reflected light of 5th reflecting mirror and the reflected light path of beam splitter are parallel to each other；
2.2) reflected light of beam splitter is incident at diffuse reflecting screen A, transmitted light by third reflecting mirror, the 4th reflecting mirror with
And the 5th reflecting mirror reflection after be incident at diffuse reflecting screen B；
2.3) far-field spot near field hot spot and B is measured at A simultaneously using infrared camera, in conjunction with the optical path difference at A, B two
Beam divergence angle is calculated；
2.4) parameter and its relative position that lens group is estimated by beam divergence angle, introduce lens in instruction optical path
Group；
2.5) make itself and laser by adjusting the distance between each eyeglass in lens group to change the instruction light angle of divergence
The main laser angle of divergence it is identical；
3) systems inspection
3.1) optical path switching alarm device is placed；
3.2) the second reflecting mirror is cut out using light path switching component, the instruction light that instruction radiant issues is through the first reflection
It is received after mirror, lens group by optical path switching alarm device；
3.3) optical detector in optical path switching alarm device outputs voltage signal to comparator, if output voltage signal exceeds
Comparator setting value then exports Transistor-Transistor Logic level, and triggering opens relay switch, lights warning light, and prompt system is normal, can be performed
Step 4)；
If output voltage signal is less than comparator setting value, comparator output is zero, not trigger relay switch, alarm
Lamp is reactionless, then it is assumed that there may be problems for system, need to check system；4) light path switching component is cut again, together
When open instruction radiant,
Realize the introducing of instruction light.Advantages of the present invention:
1, for the present invention in the case where not influencing the transmission of laser main laser, external instruction light can be with main laser coaxially with hair
The introducing at angle is dissipated, system is simple, and brightness is adjustable, improves locating effect, reduces maintenance difficulty and cost.
2, the present invention joined optical path switching alarm device during introducing, introduces process to entire instruction light and examines
It surveys, bring security risk when instruction light introduces can be eliminated.
3, present invention proposition instruction light is coaxial, can be extended to other needs with angle of divergence adjustment process adjusts coaxial, same to hair
In the optical path for dissipating angle, method is simple and easy, versatile.
Detailed description of the invention
Fig. 1 is that present invention introduces the layouts of system；
Fig. 2 is light path layout schematic diagram when adjusting with optical axis；
Fig. 3 is light path layout schematic diagram when adjusting with the angle of divergence；
Fig. 4 is light switching alarm device working principle diagram.
Appended drawing reference are as follows:
1- laser, 2- indicate radiant, the first reflecting mirror of 3-, 4- lens group, the second reflecting mirror of 5-, 6- optical path switch groups
Part, 7- optical path switching alarm device, the near field 8- adjustable diaphragm, the far field 9- adjustable diaphragm, 10- beam splitter, 11- diffuse reflecting screen, 12-
Three reflecting mirrors, the 4th reflecting mirror of 13-, the 5th reflecting mirror of 14-, 15- infrared camera, 16- optical filter, 17- optical detector, 18- ratio
Compared with device, 19- relay, 20- warning light, 21- power supply.
Specific embodiment
The present invention is specifically described below in conjunction with attached drawing.
In order to overcome defect present in existing instruction light incorporation way, the present invention provides a kind of external instructions of laser
Light safely introduces system:
Referring to Fig. 1, which includes instruction radiant 2, the first reflecting mirror 3, and lens group 4, the second reflecting mirror 5, optical path is cut
Change component 6 and optical path switching alarm device 7；
The instruction light for indicating that radiant 2 is emitted successively passes through the first reflecting mirror 3, lens group 4, the second reflecting mirror 5；Through second
The instruction light that reflecting mirror 5 reflects is overlapped with the main laser that laser 1 emits, and indicates that the optical axis and the angle of divergence of light and main laser are homogeneous
Together；
Second reflecting mirror 5 is mounted on light path switching component 6, and the second reflecting mirror 5 can be in the effect of light path switching component 6
Lower incision or the main laser optical path for cutting out the transmitting of laser 1；
Optical path switching alarm device 7 is arranged in the instruction light optical path after the reflection of the first reflecting mirror 3, and is located at the second reflection
After mirror 5.
It should be understood that the instruction radiant 1 used in this example swashs for the continuous wave of visible light wave range and power adjustable
Light device.One-dimensional automatically controlled displacement platform or optical path switcher or other, which can be used, in light path switching component 6 can play support and mobile the
The device of two-mirror.
Referring to fig. 4, optical path switching alarm device 7 includes optical filter 16, optical detector 17, comparator 18, relay 19, alarm
Lamp 20 and power supply 21；Before optical filter 16 is installed on optical detector 17, for filtering other incident lights other than indicating light；Electricity
Source 21 is connect with relay 19 and warning light 20 respectively；Electricity is exported by optical detector 17 after the reception instruction light of optical detector 17
Press signal to comparator 18, comparator 18 exports Transistor-Transistor Logic level to relay 19, lights warning light by trigger relay 19
20, normal operating can be performed in prompt system fault-free.If warning light fails to light, then it is assumed that system be likely to occur optical path not at
Function switching, instruction radiant failure or optical path switching alarm device failure etc., caused by being can avoid in this way because of instruction photosystem failure
Maloperation improves the safety of experiment.
Description based on above system is now described the method for carrying out instruction light introducing using the system, this method
Comprise the concrete steps that:
Wherein, the core of the introducing method is exactly to indicate that light and main laser be coaxial, adjusting with the angle of divergence, to realize instruction
Light and main laser be coaxial, the same to angle of divergence, it is necessary to adjust by optical axis and the angle of divergence of the process shown in Fig. 2, Fig. 3 to instruction light
Section；
Referring to fig. 2, step 1) instruction light is adjusted with optical axis.
Firstly, determining main laser optical axis:
A near field adjustable diaphragm 8 and far field tunable optical are placed in the near field and far field of the main laser optical path of laser 1 respectively
Door screen 9, adjusts the position and diameter of two adjustable diaphragms, makes the main laser of laser 1 while passing through two adjustable diaphragm centers；
Then, instruction radiant 2, the first reflecting mirror 3, the second reflecting mirror 5 are successively put, and the second reflecting mirror 5 is installed
On light path switching component 6；
Open instruction radiant, by adjusting the position of the first reflecting mirror 3, the second reflecting mirror 5, making to indicate light while passing through
Adjustable diaphragm diameter can be changed in two adjustable diaphragm centers when necessary, at this point, instruction light and main laser are coaxial.
Referring to Fig. 3, step 2) is adjusted with the angle of divergence:
In Fig. 3 light beam initial position be the second reflecting mirror 5 after, in the instruction light optical path reflected through the second reflecting mirror 5
Beam splitter 10 is placed, places third reflecting mirror 12, the 4th reflecting mirror 13 and the 5th reflecting mirror on the transmitted light path of beam splitter 10
14, diffuse reflecting screen 11 is placed on the reflected light path of beam splitter 10；Wherein, the reflected light of the 5th reflecting mirror 14 and beam splitter 10 is anti-
It penetrates optical path to be parallel to each other, and the reflected light of the reflected light path of beam splitter 10 and the 5th reflecting mirror 15 can be incident to diffuse reflecting screen
11；
The reflected light of beam splitter 10 is incident at the A of diffuse reflecting screen 11, and the transmitted light of beam splitter 10 passes through third reflecting mirror
12, it is incident at the B of diffuse reflecting screen 11 after the 4th reflecting mirror 13 and the 5th reflecting mirror 14 reflection (extending light path)；
Far-field spot near field hot spot and B is measured at A simultaneously using infrared camera 15, in conjunction with the optical path difference meter at A, B two
Calculation obtains beam divergence angle；
On this basis, parameter and its relative position that lens group 4 is estimated by beam divergence angle, in instruction light optical path
It introduces lens group 4 (mounted lens group 4 on the position i.e. between the first reflecting mirror 3 and the second reflecting mirror 5), when introducing need to ensure
Do not change optical axis position；
Finally, swashing it with main by adjusting the distance between each eyeglass in lens group 4 to change the instruction light angle of divergence
Light it is identical.
Step 3) systems inspection
Firstly, on through 3 reflected light path of the first reflecting mirror, and it is located at placement optical path switching alarm after the second reflecting mirror 5
Device 7；
Second reflecting mirror 5 is cut out using light path switching component 6, the instruction light that instruction radiant issues is through the first reflecting mirror
3, it is received after lens group 4 by optical path switching alarm device 7；
Optical detector 17 in optical path switching alarm device 7 outputs voltage signal to comparator 18, if output voltage signal is super
18 setting value of comparator out then exports Transistor-Transistor Logic level, and triggering is opened relay 19 and switched, and lights warning light 20, prompt system is just
Often, step 4) can be performed；
If output voltage signal is less than comparator setting value, comparator output is zero, not trigger relay switch, alarm
Lamp is reactionless, then it is assumed that there may be problems for system, need to check system；
Step 4) is cut the second reflecting mirror 5 using light path switching component 6 again, while open instruction radiant 2, is realized
Indicate the introducing of light.
Claims (5)
1. a kind of external instruction light of laser safely introduces system, it is characterised in that:
Including instruction radiant (2), the first reflecting mirror (3), lens group (4), the second reflecting mirror (5), light path switching component (6) with
And optical path switching alarm device (7)；
The instruction light for indicating that radiant (2) launch successively passes through the first reflecting mirror (3), lens group (4), the second reflecting mirror (5),
The main laser of instruction light and laser through the second reflecting mirror (5) reflection is coaxial, the same to angle of divergence；
Second reflecting mirror (5) is mounted on light path switching component (6), and the second reflecting mirror (5) can be in light path switching component (6)
The main laser optical path of laser transmitting is cut or cut out under effect；
Optical path switching alarm device (7) setting is located at the second reflection in the instruction light optical path after the first reflecting mirror (3) reflection
After mirror (5).
2. the external instruction light of laser according to claim 1 safely introduces system, it is characterised in that: the instruction light light
Source (2) is using visible light wave range and the continuous-wave laser of power adjustable.
3. the external instruction light of laser according to claim 1 or 2 safely introduces system, it is characterised in that: the optical path
Changeover module (6) is one-dimensional automatically controlled displacement platform or optical path switcher.
4. the external instruction light of laser according to claim 3 safely introduces system, it is characterised in that: the optical path switching
Alarm device (7) includes optical filter (16), optical detector (17), comparator (18), relay (19), warning light (20) and power supply
(21)；
Before optical filter (16) is installed on optical detector (17), for filtering other incident lights other than indicating light；
Power supply (21) is connect with relay (19) and warning light (20) respectively；
Optical detector (17) is outputed voltage signal to comparator (18) after receiving instruction light by optical detector, and comparator (18) is defeated
Transistor-Transistor Logic level lights warning light by trigger relay (19) to relay (19) out.
5. a kind of external instruction light of laser safely introduces method, it is characterised in that: use laser as claimed in claim 4
External instruction light safely introduces system, and the introducing of instruction light is realized by following steps:
1) it is adjusted with optical axis
1.1) adjustable diaphragm is respectively placed near field, the far field of the main laser optical path of laser (1) outgoing, adjusts adjustable diaphragm
Position and diameter, make the main laser optical path of laser (1) while passing through two adjustable diaphragm centers；
1.2) instruction radiant (2), the first reflecting mirror (3), the second reflecting mirror (5) are successively put；
1.3) open instruction radiant (2) make to indicate light by adjusting the position of the first reflecting mirror (3), the second reflecting mirror (5)
Simultaneously by two adjustable diaphragm centers, so that the main laser of instruction light and laser is coaxial；
2) it is adjusted with the angle of divergence
2.1) beam splitter (10) are placed in the instruction light optical path reflected through the second reflecting mirror (5), the transmitted light of beam splitter (10)
Place third reflecting mirror (12), the 4th reflecting mirror (13) and the 5th reflecting mirror (14), the reflected light path of beam splitter (10) in road
Upper placement diffuse reflecting screen (11)；Wherein, the reflected light of the 5th reflecting mirror (14) and the reflected light path of beam splitter (10) are parallel to each other；
2.2) reflected light of beam splitter (10) is incident at diffuse reflecting screen (11) A, and transmitted light passes through third reflecting mirror (12), the 4th
It is incident at diffuse reflecting screen (11) B after reflecting mirror (13) and the reflection of the 5th reflecting mirror (14)；
2.3) far-field spot near field hot spot and B is measured at A simultaneously using infrared camera (15), in conjunction with the optical path difference at A, B two
Beam divergence angle is calculated；
2.4) parameter and its relative position that lens group is estimated by beam divergence angle, introduce lens group (4) in instruction optical path；
2.5) make itself and laser by adjusting the distance between each eyeglass in lens group (4) to change the instruction light angle of divergence
The main laser angle of divergence it is identical；
3) systems inspection
3.1) optical path switching alarm device (7) are placed；
3.2) the second reflecting mirror (5) is cut out using light path switching component (6), the instruction light that instruction radiant (2) issues is through the
It is received after one reflecting mirror (3), lens group (4) by optical path switching alarm device (7)；
3.3) optical detector (17) in optical path switching alarm device (7) outputs voltage signal to comparator (18), if output voltage
Signal exceeds comparator (18) setting value, then exports Transistor-Transistor Logic level, and triggering opens relay (19) switch, lights warning light (20),
Prompt system is normal, and step 4) can be performed；
If output voltage signal is less than comparator (18) setting value, comparator (18) output is zero, can not trigger relay
(19) switch, warning light (20) are reactionless, then it is assumed that there may be problems for system, need to check system；
4) light path switching component (6) is cut, while open instruction radiant (2) and laser (1) again, realizes instruction light
Introducing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910185214.3A CN109802293B (en) | 2019-03-12 | 2019-03-12 | Laser external indicating light safe leading-in system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910185214.3A CN109802293B (en) | 2019-03-12 | 2019-03-12 | Laser external indicating light safe leading-in system and method |
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| Publication Number | Publication Date |
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| CN109802293B CN109802293B (en) | 2020-07-28 |
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| CN111879238A (en) * | 2020-07-31 | 2020-11-03 | 北京环境特性研究所 | Device and method for rapidly adjusting size of terahertz time-domain spectroscopy measurement quiet zone |
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| CN111224315A (en) * | 2019-11-28 | 2020-06-02 | 山东华光光电子股份有限公司 | LD red TO laser packaging method of gold-tin process |
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| CN111879238A (en) * | 2020-07-31 | 2020-11-03 | 北京环境特性研究所 | Device and method for rapidly adjusting size of terahertz time-domain spectroscopy measurement quiet zone |
| CN111879238B (en) * | 2020-07-31 | 2022-01-28 | 北京环境特性研究所 | Device and method for rapidly adjusting size of terahertz time-domain spectroscopy measurement quiet zone |
| CN113640827A (en) * | 2021-08-02 | 2021-11-12 | 安徽皖仪科技股份有限公司 | Automatic obstacle avoidance system and automatic obstacle avoidance method for laser radar |
| CN113640827B (en) * | 2021-08-02 | 2024-02-09 | 安徽皖仪科技股份有限公司 | Automatic obstacle avoidance system and automatic obstacle avoidance method for laser radar |
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