CN103639591A

CN103639591A - Laser marking method

Info

Publication number: CN103639591A
Application number: CN201310595231.7A
Authority: CN
Inventors: 吕武全
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-21
Filing date: 2013-11-21
Publication date: 2014-03-19

Abstract

The invention relates to a laser marking method. A laser source and a scanning mirror are used. The method includes opening a laser source to enable the laser source to output laser with constant power; conducting XY coordinate point-by-point irradiation on a solid carrier according to scanning sequence based on all pixel points of a pattern input in advance and determining irradiation time Ti of the coordinate point at each position according to the gray levels of corresponding pixel points. The higher the gray level is, the longer the irradiation time Ti is. The lower the gray level is, the shorter the irradiation time is. The scanning speed changes with the change of the image gray level. The scanning speed is low in the place with high gray level, and the scanning speed is high in the place with low gray level. The laser marking method does not require laser sources with high price, and production efficiency is high.

Description

A kind of laser marking method

Technical field

The present invention relates to mark and laser scanning, be specifically related to a kind of laser marking method.

Background technology

Tradition marking method comprises corrosion, spark machined, mechanical scratching, printing, poor efficiency and have pollution more.Laser marking technology has been widely used in all trades and professions, is high-quality, and efficient, wide prospect has been opened up in pollution-free and modern processing cheaply.

Laser marking refers to that Polariscope motor drives speculum reflection laser to scan, environmental protection, but production equipment input is too high.The concrete principle of laser marking is: by laser beam incident to two speculums (scanning mirror), the reflection angle of speculum computerizeds control, these two speculums can be respectively along X, Y axis scanning, thereby reach the deflection of laser beam, the Laser Focusing point that makes to have certain power density on mark material by required requirement campaign, thereby on material surface, leave permanent mark.

Scan control is the core technology of laser marking, and scanning is applied to display the earliest, is now widely used in various images processing, digital imagery aspect.Present scanning is all also the scanning based in display the earliest: utilize persistence of vision principle, make electron beam fix on the panel of pick-up tube or kinescope and make periodic motion process by one.For guaranteeing imaging effect, its constant period, sweep speed is constant.

Now, all its laser of existing laser marking device is all also the constant-speed scanning of scan period, constant rate on the object being marked, and by changing time dependent some watt level of laser, reaches the method that generates the deep mixed marking on object.This mode, require lasing light emitter transmitting power variable, also require lasing light emitter to want fast to transmit power variation instruction response simultaneously, and the lasing light emitter that at present China produces does not also reach, its performance indications are can steady operation and surpass 1W hour service time continuously, and operating power reaches 30W, price is 10W$, similar Foreign Laser source can reach, and its performance indications are 300W, but its price is 100W $.Cause like this domestic manufacturers to compete, thus laser marking device price high not under.And this constant speed mode do not make full use of Laser emission power, production efficiency is lower.

Summary of the invention

The technical issues that need to address of the present invention are, how a kind of laser marking method is provided, can break through tradition scanning limitation, reduce the requirement to lasing light emitter, make domestic lasing light emitter also can meet laser marking, fill the domestic gaps, greatly reduce equipment cost and raise the efficiency, thereby can obtain spread.

Above-mentioned technical problem of the present invention solves like this: build a kind of laser marking method, use lasing light emitter and scanning mirror, it is characterized in that, comprise the following steps:

Opening lasing light emitter makes it with firm power Output of laser;

All pixels based on prior input pattern carry out XY coordinate laser pointwise illumination by scanning sequency to carrier in kind, and the irradiation time Ti of each position coordinate points is according to the gray value calculative determination of corresponding pixel points: gray scale is darker, irradiation time Ti is longer or gray scale is more shallow, irradiation time Ti is shorter.

According to laser marking method provided by the invention, described scanning includes, but are not limited to following concrete mode:

(i) described scanning sequency be from top to bottom, from a left side to the right side;

(ii) described scanning sequency is from top to bottom, from right to left;

(iii) described scanning sequency is to line by line scan.

According to laser marking method provided by the invention, irradiation time Ti is calculated on irradiation limit, the preferred limit of this laser marking method, improves processing speed.

According to laser marking method provided by the invention, described pointwise illumination is to all pixels full illumination of prior input pattern once.

According to laser marking method provided by the invention, this laser marking method also comprises definition is set: definition is higher, from prior input pattern, obtains and needs all pixels of irradiating more.

According to laser marking method provided by the invention, this laser marking method also comprises laser output power is set: laser output power is larger, and the mark time is fewer; Described laser output power is less than or equal to the maximum output of using lasing light emitter.

According to laser marking method provided by the invention, this laser marking method also comprises by bearer type in kind material is set, and described material comprises that the non-metallic materials such as burlap, paper, cork, even can processing metal in the situation that energy is enough.

According to laser marking method provided by the invention, this laser marking method also comprises by sweep speed and frequency are set, for controlled working effect.

According to laser marking method provided by the invention, the formula that described calculating is used is Ti=k (Gray (x, y)); Wherein: K refers to gradation effect proportionality coefficient, and Gray refers to distributed function, X, Y is coordinate coefficient.

Laser marking method provided by the invention, breaks through traditional scanning technique, compared with prior art has following outstanding advantages:

1, equipment cost declines, and efficiently utilizes light source, in the situation that guaranteeing with texts, can use the laser instrument of domestic 100W in same equal time, to complete the effect of import laser instrument 250W;

2, improve the production efficiency of ten times;

3, make the new technology of environmental protection be able to spread.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, further the present invention is described in detail.

Fig. 1 is the structural representation of laser marking device of the present invention;

Fig. 2 is the mark control flow schematic diagram of Fig. 1 apparatus shown;

Fig. 3 scans the schematic flow sheet of subprogram in Fig. 2.

Reference numeral wherein:

Lasing light emitter 1, lens 2, scanning mirror 3, scanning platform 4.

The specific embodiment

As shown in Figure 1, laser marking device provided by the invention mainly by: lasing light emitter 1, lens 2, scanning mirror 3 and the scanning platform 4 of placing carrier in kind form, on the carrier in kind of high-energy Emission Lasers in scanning platform 4, irradiate, scan, form mark pattern or character.

As shown in Figure 2, the mark control program of laser marking device of the present invention comprises the following steps:

201) start;

202) input pending figure, word or sign;

203) by man-machine interface, definition, sweep speed, laser power, material and frequency are set;

204) open galvanometer power supply and lasing light emitter power supply;

205) Ti is calculated on limit, limit scanning; Ti=k (Gray (x, y)) wherein;

Ti=Laser Time(laser irradiation time wherein)

K=gradation effect proportionality coefficient

Gray=distributed function

X, Y coordinate coefficient

206) been scanned finishes.

As Fig. 3 shows, in the mark control program of laser marking device of the present invention, scan subprogram and comprise following steps:

301) start;

302) scanning initial position coordinate (i=1);

303) judge whether this irradiation time is to enter next step, otherwise return to this step to Ti;

304) judge whether that i=END is, enter next step, otherwise scanning the next position coordinate (i=i+1) enters step 303);

305) all points of irradiation calculating is complete, processing.

The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the claims in the present invention scope change and modify, and all should belong to the covering scope of the claims in the present invention.

Claims

1. a laser marking method, is used lasing light emitter and scanning mirror, it is characterized in that, comprises the following steps:

Opening lasing light emitter makes it with firm power Output of laser;

All pixels based on prior input pattern carry out XY coordinate laser pointwise illumination by scanning sequency to carrier in kind, and the irradiation time Ti of each position coordinate points is according to the gray value calculative determination of corresponding pixel points: gray scale is darker, irradiation time Ti is longer.

2. laser marking method according to claim 1, is characterized in that, described scanning sequency be from top to bottom, from a left side to the right side.

3. laser marking method according to claim 1, is characterized in that, described scanning sequency is from top to bottom, from right to left.

4. according to claim 1 laser marking method, it is characterized in that, described scanning sequency is shuttle-scanning line by line.

5. according to laser marking method described in claim 1-4 any one, it is characterized in that, this laser marking method is to calculate irradiation time according to fixing ratio data.

6. laser marking method according to claim 5, is characterized in that, described pointwise illumination is to all pixels full illumination of prior input pattern once.

7. laser marking method according to claim 6, is characterized in that, this laser marking method also comprises definition is set: definition is higher, from prior input pattern, obtains and needs all pixels of irradiating more.

8. laser marking method according to claim 6, is characterized in that, this laser marking method also comprises laser output power is set: laser output power is larger, and the mark time is fewer; Described laser output power is less than or equal to the maximum output of using lasing light emitter.

9. according to claim 6 laser marking method, it is characterized in that, this laser marking method also comprises by bearer type in kind material is set, described material comprises the non-metallic materials such as burlap, paper, cork, and enough and enough bearing capacitys of probe in the situation that, can be applicable to a lot of materials at energy of light source.

10. laser marking method according to claim 9, is characterized in that, this laser marking method also comprises by sweep speed and frequency are set, for adjusting laser instrument peak power, and then reaches the object of controlled working effect.