CN103384949B - Forbid the unwarranted access to lasing light emitter - Google Patents
Forbid the unwarranted access to lasing light emitter Download PDFInfo
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- CN103384949B CN103384949B CN201280004728.0A CN201280004728A CN103384949B CN 103384949 B CN103384949 B CN 103384949B CN 201280004728 A CN201280004728 A CN 201280004728A CN 103384949 B CN103384949 B CN 103384949B
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- light emitter
- lasing light
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Abstract
The present invention relates to lasing light emitter (3) field, the infringement caused more particularly to the misuse of the high power laser source (3) forbidden owing to providing in lasing light emitter (3), particularly consumer goods (1).The device (1) proposed at least includes lasing light emitter (3) and safe unit (2), wherein by the setting of safe unit (2), it is provided that following effect: by reducing lasing light emitter (3) output power levels or limiting even with stopping the output of its any laser completely or even stop based on lasing light emitter (3) unwarranted access to be misapplied the potential hazard caused by lasing light emitter (3).Also proposed the correlation method that lasing light emitter (3) is provided and the other method stoping lasing light emitter (3) to be misapplied.
Description
Technical field
The present invention relates to lasing light emitter field, the infringement caused more particularly to the misuse of the high power laser source forbidden owing to possessing in lasing light emitter, particularly consumer products.
Background technology
Laser technology is applied to multiple field, including instruction device, optical storage of data, bar code scanning, 3-D scanning, the digital projection of image and the cutting of material or engraving.In some of these fields, for the purpose of laser, the laser beam used is limited in the inside of corresponding product, and in other cases, laser beam leaves this device (such as in the case of laser designator or for digital image projection).
Depend specifically on the power of laser beam, there is danger (such as infringement eyes or even skin) or the danger of infringement object of the harm mankind or animal health.
In US 7,676,061 B2, it is proposed that the existence of laser beam, focusing and the integrity of a kind of lens He other parts for checking focused laser system are to improve people and object safety in order to avoid accidental exposure laser safety system under this laser beam.US
7,676,061 B2 suggestions provide alarm or disabling lasing light emitter in the case of unusual condition is detected recognizing.
But, exist about using commercial laser indicator to disturb the report of goalkeeper during football match, wherein during taking off or landing, similar interference to aircraft pilots possibly even causes catastrophic accident.
Although similar to US 7, system as the system of 676,061 B2 can improve the overall security using laser technology in expection environment, but still existence deliberately misapplies the probability of lasing light emitter for non-originating expection purpose.
Along with laser is increasingly entering in the field of image digitization projection, the demand of brightness being caused to the consumer products comprising the lasing light emitter of the power output with up to tens watts, the abuse of the most such lasing light emitter forms serious threat.
Summary of the invention
It is an object of the invention to reduce the danger involved by the attempt abusing this lasing light emitter outside the expection environment of lasing light emitter.
In the first aspect of the invention, propose a device, this device includes lasing light emitter and safe unit, wherein safe unit includes the detector for detecting unauthorized access lasing light emitter, and this safe unit is suitable to cause when lasing light emitter carries out unwarranted access so that lasing light emitter is inoperable or reduces the exportable power of lasing light emitter, so that lasing light emitter is permanently disabled.
The inventors found that, in order to avoid or at least alleviate the ill-effect of potential misuse of laser equipment of potentially dangerous, armed with for reducing the measure that lasing light emitter is dangerous, then typically without stoping laser equipment or the unwarranted access to lasing light emitter, wherein by disabling lasing light emitter (preferably permanently, alternately becoming in irrational this degree) in maintenance or can provide the danger to lasing light emitter such reduction by reducing the power of the laser beam that can therefrom export.
In the case of lasing light emitter becomes to can use unwarranted access, i.e. running counter to for lasing light emitter generally and in the case of expection uses the probability of the safety measure provided existing, the device comprising lasing light emitter is suitable to damage at least in part lasing light emitter and reaches such degree by safe unit: reduce and preferably eliminate thereby result in danger (such as to the danger of the user self of unexpected misuse lasing light emitter or typically in the case of misapplying to third-party danger).
Lasing light emitter and safe unit is at least included according to assembly of the invention, wherein by the setting of safe unit, it is provided that following effect: by reducing lasing light emitter output power levels or limiting even with stopping the output of its any laser completely or even prevent by the potential hazard misuse of lasing light emitter caused based on the unauthorized access to lasing light emitter.
In a preferred embodiment, this device farther includes the interface outside device, wherein this interface be adapted to provide for mandate action to stop safe unit cause described in make and/or reduce, therefore allow the mandate to lasing light emitter to access.Device according to this embodiment allows response to distinguish the access of mandate and unwarranted access from outside input, so that execution is safeguarded or service is possibly realized such as do not trigger safe unit at access lasing light emitter in the case of.It should be noted, however, that the present invention equally with no longer exist the mandate to lasing light emitter access and any access be regarded as unwarranted mode and realize.
In one particular embodiment, interface includes the user interface being suitable to accept user's input, and wherein this interface is suitable to take action to authorizing time corresponding with predetermined access code in user's input.A kind of probability allowing outside authorized access is the code of input validation mandate, password or other data.Such user input may relate to the process added, and this is well-known in the environment of being used for the password accessing control and similar means.
In another special embodiment, interface is operably coupled to external authorization device, and wherein interface is suitable to provide in the case of outside authorization device provides scheduled visit code for interface authorize action.Alternative scheme or in addition as the special characteristic of above-described embodiment, access it is also possible to grant the mandate to lasing light emitter when introducing single authorization device (such as dongle (dongle) or simple key), these give additional advantage, i.e. relative to for verifying the versatility that the routine of authorization device is bigger.
In another particular embodiment, action is authorized to include exporting authorization code from interface to safe unit.Safe unit is suitable to check that this access was authorized or unwarranted before causing lasing light emitter to damage.Additionally, such inspection can include the further data exchange between safe unit and interface.
In another specific embodiment, authorize action to include temporarily making safe unit inertia, temporarily lasing light emitter is removed from the influence area of safety device, and/or temporarily limit this influence area lasing light emitter is excluded from this region.As indicated by herein, safe unit has any positive response or reaction to so action to authorize action to be not necessarily mean that, because as the direct result of the mandate action further participated in not having safe unit self, safe unit can also be prevented from damaging lasing light emitter.
In another preferred embodiment, safe unit be suitable to lasing light emitter any access time cause so that lasing light emitter is inoperable or reduce lasing light emitter exportable power.As described above, the present invention is not restricted to wherein there is also the situation that lasing light emitter authorizes the probability accessed.
In yet another embodiment, safe unit includes the detector for detecting the access to lasing light emitter.Although safe unit is provided to stop passively unwarranted (or the most any) to lasing light emitter to access (such as by mechanically or electrically arranging lasing light emitter and safe unit in the way of as follows: make the access being not allowed to itself can cause the destruction of lasing light emitter), but the protection being to provide can also alternately or additionally initiative recognition based on the access to lasing light emitter.
In a specific embodiment, this device farther includes the shell for lasing light emitter and/or the structure to lasing light emitter supports, and the disconnection that wherein detector is suitable between the opening by detection shell and/or lasing light emitter and structure support detects the access to lasing light emitter.Include checking that the shell including lasing light emitter is closed to a particular instance of the initiative recognition accessed, and/or lasing light emitter is to the existence of the connection of the element of the normal device supporting lasing light emitter.
In yet another preferred embodiment, safe unit is suitable to by making lasing light emitter inoperable to the lasing light emitter destructive voltage of input and/or electric current.Owing to lasing light emitter (particularly laser diode) to operate under given conditions, meet such conditions permit the most voluntarily and for good and all disable lasing light emitter and without the complete redesign of lasing light emitter and/or its control circuit.
In another preferred embodiment, safe unit is suitable to destroy lasing light emitter because making lasing light emitter inoperable.As supplement or alternatively, according to only stoping lasing light emitter to operate under its normal mode, the present embodiment structurally destroys lasing light emitter self.
In a particular embodiment, safe unit is suitable to mechanically and/or chemically destroy lasing light emitter.The probability destroying lasing light emitter includes fragmentation, bends or cut at least one ingredient of lasing light emitter to destroy it, wherein destroys and can also such as chemically be provided by etching lasing light emitter or one part.
In yet another preferred embodiment, safe unit is suitable to by making the laser outgoing route of lasing light emitter opaque and/or stopping that the laser outgoing route of lasing light emitter makes lasing light emitter inoperable and/or reduces the exportable power of lasing light emitter.It is found the output that be enough to stop or at least reduce laser, because reducing output or even preventing the lasing light emitter of output may cause less injury.
In another aspect of the present invention, propose the method that lasing light emitter is provided, wherein the method includes the step providing the safe unit with the detector for detecting unauthorized access lasing light emitter, wherein safe unit is suitable to cause when unauthorized access lasing light emitter so that lasing light emitter is inoperable or reduces the exportable power of lasing light emitter, so that lasing light emitter is permanently disabled.
In another aspect of the present invention, it is proposed that the method stoping lasing light emitter misuse, the method includes the step by detector detection unauthorized access lasing light emitter；When unauthorized access lasing light emitter by means of making lasing light emitter inoperable or reduce the exportable power of lasing light emitter forever to disable the step of lasing light emitter.
It should be appreciated that the method stoping lasing light emitter misuse of the method providing lasing light emitter of the device of claim 1, claim 13 and claim 14 has the preferred embodiment as limited in dependent claims similar, correspondence and/or the most identical.
Should be understood that the preferred embodiments of the present invention can also be any combination of any dependent claims and corresponding independent claims.
These and other aspects of the invention will be clear according to embodiments described hereinafter and be illustrated with reference to these embodiments.
Accompanying drawing explanation
In drawings below:
Fig. 1 diagrammatically illustrates the device according to the first exemplary embodiment of the present invention,
Fig. 2 diagrammatically illustrates the device according to the second exemplary embodiment of the present invention,
Fig. 3 diagrammatically illustrates the device according to the third exemplary embodiment of the present invention,
Fig. 4 diagrammatically illustrates the device according to the fourth exemplary embodiment of the present invention,
Fig. 5 shows the schematic illustration flow chart according to the exemplary embodiment of the method providing lasing light emitter of the present invention, and
Fig. 6 shows the schematic illustration flow chart according to the exemplary embodiment of the method stoping lasing light emitter misuse of the present invention.
Detailed description of the invention
Fig. 1 diagrammatically illustrates the device 1 of the first exemplary embodiment according to the present invention.Device 1 is the image projection device including lasing light emitter 3, and wherein image projection device 1 farther includes safe unit 2.Safe unit 2 in this embodiment is suitable to cause so that lasing light emitter is inoperable when unauthorized access lasing light emitter.In other words, safe unit 2 can to affect lasing light emitter 3(as shown in arrow 4) and its operability.In this example, lasing light emitter 3 is made up of laser diode, and wherein safe unit 2 can provide the voltage of reversed polarity forever to disable lasing light emitter 3 for lasing light emitter 3.Correspondingly, in the embodiment in figure 1, if there is any access to lasing light emitter (in the case of with no authorized, any access is all counted as unwarranted), safe unit 2 will provide sufficiently large backward voltage, thus disable lasing light emitter 3 and therefore prevent the misuse of lasing light emitter 3, otherwise it would be possible to cause access unconfined to lasing light emitter 3.
Fig. 2 diagrammatically illustrates the device 1 according to the second exemplary embodiment of the present invention.The basic structure of the device 1 of this embodiment is largely corresponding to the structure of the embodiment of Fig. 1, and wherein the device 1 of the second exemplary embodiment farther includes interface 5.Interface 5 is provided with the user interface 7 for accepting user's input and the external device interface 8 for coupled external authorization device 9.As in the case of the embodiment shown in figure 1, it is the most as shown in arrow 4 that safe unit 2 is suitable to affect lasing light emitter 3().But in the present embodiment, safe unit 2 is suitable to by applying opacifying agent to reduce the output of lasing light emitter 3 in the case of lasing light emitter 2 carries out unauthorized access on the outgoing route of lasing light emitter 2.But, moreover, it being different from the embodiment of Fig. 1, interface 5 allows to authorize input, or by customer-furnished user interface 7 or by the authorization device 9 being coupled to external device interface 8.Authorizing input armed with such, safe unit 2 is taked mandate action (as shown in arrow 6), thus is stoped safe unit 2 to be triggered by interface.
In various embodiments, interface requests is from the correct mandate input of both user interface and external device interface, in order to confirm to access the access for authorizing.
Fig. 3 schematically shows the device 1 according to the third exemplary embodiment of the present invention.Similar with the device of Fig. 2, the device 1 of this embodiment includes safe unit 2, lasing light emitter 3 and has the interface 5 of user interface 7 and external device interface 8, and wherein external device interface 8 is suitable to couple with external device (ED) as such as authorization device 9.Being different from the embodiment of Fig. 2, this safe unit 2 is suitable to for the spring catch (not shown) of perforation by release thus be destroyed lasing light emitter 3 and mechanically destroy lasing light emitter 3.And, when from user's (via user interface 7) and external device (ED) 9(via external device interface 8) receive simultaneous authorize input time, interface 5 is suitable to by stopping spring catch (shown in arrow 10) independently, so spring catch is practically without being released (being indicated by the arrow indicated by (4)), take the act of authorization.Otherwise, the operation of the embodiment of Fig. 3 is corresponding with the operation of the embodiment of Fig. 2.
Fig. 4 schematically shows the device 1 according to the fourth exemplary embodiment of the present invention.Similar with the embodiment of previous figures and discussion, device 1 includes safe unit 2 and lasing light emitter 3.It addition, this device includes that the shell 12 surrounding lasing light emitter 3 and the structure for lasing light emitter 3 support 13.Supporting 13 by structure, it is internal that lasing light emitter 3 is fixed on device 1.And, safe unit 2 includes detector 11, its opening being adapted to detect for shell 12 and lasing light emitter 3 with support intact between 13 connection.In this embodiment, being considered as unwarranted access to the opening of shell 12 or lasing light emitter 3 from the detection of the disconnection supporting 13, this causes safe unit 2 to make lasing light emitter 3 the most inoperable (seeing above, arrow 4).From the combination of the detections supporting 13 disconnections, detection to the opening of shell 12 gives the advantage that detector can be limited to such degree for the sensitivity of shell 12 opening with to lasing light emitter 3: pass through opening therein together with making any permission lasing light emitter 3 and supporting 13 detected.If lasing light emitter 3 is not from supporting 13 disconnections, such sensitivity guarantees that lasing light emitter 3 will not be removed from shell 12.But, if lasing light emitter 3 supports 13 disconnections, this event detection trigger from structure, whether it is opened regardless of shell 12.Due to the detection to shell 12 opening, it is also blocked from including the unwarranted access removing lasing light emitter 3 and support 13 together or is detected.
Fig. 5 shows the indicative icon flow chart according to the exemplary embodiment of the method providing lasing light emitter of the present invention.In addition to 20 lasing light emitters are only provided, the method farther includes to provide the additional step 21 of safe unit (safe unit as discussed above), wherein safe unit is suitable to when unauthorized access lasing light emitter, causes so that lasing light emitter is inoperable or reduces the exportable power of lasing light emitter.It should be noted that the order of these steps can also reverse.
Fig. 6 shows the indicative icon flow chart according to the exemplary embodiment of the method stoping lasing light emitter misuse of the present invention.When unwarranted access at lasing light emitter being detected (step 30), cause at least one in the step (step 32) of the step (step 31) inoperable so that lasing light emitter or the reduction exportable power of lasing light emitter.
Inherent contact is actually had with corresponding safety measure, say, that unwarranted access itself directly results in or performs safety measure it should be pointed out that, unwarranted access is detected.In other words, trigger safety measure and can essentially be understood to the detection to unauthorized access.
Although including that the device of lasing light emitter is described as digital image projector in the above-described embodiment, but this device can also be another includes the device of lasing light emitter, such as cut or laser carving device.
Those skilled in the art are by research accompanying drawing, disclosure and appended claims, during putting into practice invention required for protection, it is to be understood that and realize other variant of disclosed embodiment.
In the claims, word " includes " being not excluded for other element or step, and indefinite article "a" or "an" is not excluded for multiple.
Individual unit or device can realize the function of some described in claim.Narration this fact of certain measures is not offered as the combination of these measures and can not be utilized the most in mutually different dependent claims.
Any reference in the claims is all not necessarily to be construed as the restriction to scope.
Device that is presented herein and that describe at least includes lasing light emitter and safe unit, wherein by the setting of safe unit, it is provided that following effect: by reducing lasing light emitter output power levels or therefrom exporting and limit even with stopping any laser completely or even stop by the potential hazard misuse of lasing light emitter caused based on the unauthorized access to lasing light emitter.Herein it is also proposed that and describe the correlation method providing lasing light emitter and the other method stoping lasing light emitter misuse.
Laser instrument can be dangerous device, and it may be easily caused the injury of eyes or even skin.In order to ensure safety, the laser instrument great majority in consumer products are the laser instrument of laser instrument classification 1 or are the laser instrument of classification 2 in some cases.In consumer products, modal laser instrument is in the CD/DVD/ blu-ray drive of optical storage, and it is impossible for wherein accessing laser beam in the case of being not switched on this device.
This situation is different from laser designator, and in laser designator, the light of laser instrument should be seen.Here, laser power should be maintained at such low level so that equipment is still in laser instrument classification 1 or 2.
The misuse of laser instrument is dangerous.Along with the ever-increasing availability of laser in consumer products, it is necessary to consider its potential misuse.One example of this kind of misuse is in the news from football match, and wherein the vermicelli of a team uses laser designator to disturb the goalkeeper of another team.Worse situation is that aircraft pilots is interfered in a similar manner when taking off or land, and this may cause real catastrophic accident.
Along with can be obtained by more and more powerful lasing light emitter only by taking product apart, this lasing light emitter is provided and potential may affecting of dangerous and such misuse of misapplying increases.A few days ago, have and released market more than the laser-projector of 20W laser power, and have been provided for the high power laser light indicator using laser-projector parts beyond any security restriction via the Internet now.It is true that at present laser instrument enters digital projector arena day by day, wherein on screen, the brightness demand of thousand of lm directly results in the laser power installed on this projector and reaches tens W.Sending a branch of collimated beam in blue wavelength with only 1W laser power, can easily reach laser safety classification 4, wherein the misuse to this kind of laser is likely to be formed the great threat to public security.
In this application, it is proposed that help to stop or at least alleviate the measure of the misuse of laser aid parts.Discussed above is an example of such measure, and this example include providing destroy unit as the example of safe unit, interlocking is as the example of interface and stops when accessing lasing light emitter and destroys the key that unit is activated.The most authorized people can use this key to discard destruction and arrange, and therefore can access lasing light emitter, such as, be used for servicing.The unauthorized person not having key will not be able to access laser instrument in the case of not activating destruction unit.This will cause the destruction of lasing light emitter, so that lasing light emitter is no longer misapplied.
Discussing the use of the safety measure of the consumer products device of the laser instrument being particularly directed to comprise potential danger in this application, this measure does not allow to access laser instrument without permission, and does not destroy them or laser power is reduced to less dangerous level.
Destruction unit presented above is for destroying the laser diode of lasing light emitter, and can realize in several ways: such as, and it can have electrical property, and can result in excess backward voltage to destroy diode.So a kind of possible implementation of example can be capacitor, and this capacitor discharges on laser diode when destroying unit and being activated.Another kind of implementation can be explosive, and it is triggered for spray paint on laser diode or enamel so that its window is opaque or is blocked.Other measures destroying diode can be readily apparent that, and above example list is not exhaustive.
Allow to authorize the key accessed can also have various character: a kind of possible be achieved in that the digital code that can be supplied to it before opening exemplary projection instrument apparatus.Another example is the dongle device with the suitable key being safely stored into it.Other alternative scheme is also feasible, does not the most provide any access to lasing light emitter, the most any trial distorting lasing light emitter to cause lasing light emitter to be caught inoperable or at least its power and is reduced.
The present invention relates to lasing light emitter field, more particularly to forbidding the infringement that brings due to the misuse of high power laser source provided in lasing light emitter, particularly consumer products.The device proposed at least includes lasing light emitter and safe unit, wherein by the setting of safe unit, it is provided that following effect: by reducing lasing light emitter output power levels or limiting even with stopping the output of its any laser completely or even stop by the potential injury misuse of lasing light emitter caused based on the unauthorized access to lasing light emitter.Also proposed the correlation method that lasing light emitter is provided and the other method stoping lasing light emitter misuse.
Claims (13)
1. the device stoping lasing light emitter to be misapplied (1), including
-lasing light emitter (3) and
-safe unit (2),
Wherein safe unit (2) includes the detector (11) for detecting unauthorized access lasing light emitter (3), and this safe unit is suitable to cause when unauthorized access lasing light emitter (3),
-make lasing light emitter (3) inoperable, or
-reduce lasing light emitter (3) exportable power,
So that lasing light emitter (3) is permanently disabled,
Wherein safe unit (2) is suitable to destroy lasing light emitter (3) when making lasing light emitter (3) inoperable.
Device the most according to claim 1 (1), farther includes
-it is coupled to the interface (5) that device (1) is outside,
Wherein interface (5) be adapted to provide for mandate action (6,10) stop safe unit (2) cause described in make and/or reduce, thus allow to access lasing light emitter (3) authorizedly.
Device the most according to claim 2 (1),
Wherein interface (5) includes the user interface (7) being suitable to accept user's input, and wherein this interface (5) is suitable to provide in the case of user's input is corresponding with predetermined access code authorize action (6,10).
Device the most according to claim 2 (1),
Wherein interface (5) is operably coupled to external authorization device (9), and wherein interface (5) is suitable to provide in the case of predetermined access code is supplied to interface (5) by outside authorization device (9) authorize action (6,10).
Device the most according to claim 2 (1),
Wherein authorize action (6) to include from interface (5) and export authorization code to safe unit (2).
Device the most according to claim 2 (1),
Wherein authorize action (10) to include temporarily making safe unit (2) inertia, temporarily lasing light emitter (3) is removed from the influence area of safe unit (2) and/or temporary transient limitations affect region is therefrom to get rid of lasing light emitter (3).
Device the most according to claim 1 (1),
Wherein, safe unit (2) is suitable to cause when lasing light emitter carries out any access
-make lasing light emitter (3) inoperable, or
The exportable power of-reduction lasing light emitter (3).
Device the most according to claim 1 (1),
Farther include
-shell (12) for lasing light emitter (3) and/or structure support (13),
Wherein detector (11) be suitable to by detection shell (12) opening and/or lasing light emitter (3) from structure support (13) disconnection detect the access to lasing light emitter (3).
Device the most according to claim 1 (1),
Wherein safe unit (2) is suitable to by inputting destructive voltage to lasing light emitter (3) and/or electric current makes lasing light emitter (3) inoperable.
Device the most according to claim 9 (1),
Wherein safe unit (2) is suitable to mechanically and/or chemically destroy lasing light emitter (3).
11. devices according to claim 1 (1),
Wherein safe unit (2) is suitable to by making the laser outgoing route of lasing light emitter (3) opaque and/or stopping that the laser outgoing route of lasing light emitter makes lasing light emitter (3) inoperable and/or reduces the exportable power of lasing light emitter (3).
12. 1 kinds of methods that lasing light emitter (3) is provided, including
-offer has the step (21) of the safe unit (2) of the detector (11) for detecting unauthorized access lasing light emitter (3),
Wherein safe unit (2) is suitable to cause when unauthorized access lasing light emitter (3),
-make lasing light emitter (3) inoperable, or
The exportable power of-reduction lasing light emitter (3),
So that lasing light emitter (3) is permanently disabled,
Wherein safe unit (2) is suitable to destroy lasing light emitter (3) when making lasing light emitter (3) inoperable.
13. 1 kinds stop the method that lasing light emitter (3) is misapplied, including step
-by detector (11) detection unauthorized access lasing light emitter (3) step,
-when unauthorized access lasing light emitter (2) by the step of following every permanent disabling lasing light emitter (3):
-make lasing light emitter (3) inoperable, or
The exportable power of-reduction lasing light emitter (3),
-when making lasing light emitter (3) inoperable destroy lasing light emitter (3) step.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11150279.5 | 2011-01-06 | ||
| EP111502795 | 2011-01-06 | ||
| EP11150279 | 2011-01-06 | ||
| PCT/IB2012/050034 WO2012093359A1 (en) | 2011-01-06 | 2012-01-04 | Inhibiting unauthorized access to a laser source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103384949A CN103384949A (en) | 2013-11-06 |
| CN103384949B true CN103384949B (en) | 2016-11-30 |
Family
ID=
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6160568A (en) * | 1997-05-27 | 2000-12-12 | Sdl, Inc. | Laser marking system and method of energy control |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6160568A (en) * | 1997-05-27 | 2000-12-12 | Sdl, Inc. | Laser marking system and method of energy control |
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Granted publication date: 20161130 Termination date: 20210104 |