CN200983060Y

CN200983060Y - Laser control set

Info

Publication number: CN200983060Y
Application number: CN 200620052305
Authority: CN
Inventors: 叶重凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-20
Filing date: 2006-09-20
Publication date: 2007-11-28
Anticipated expiration: 2016-09-20

Abstract

Disclosed is a laser controlling device, more particularly a laser module with automatic control of the laser power, which comprises a laser source device. The front of the laser source device is provided with focusing lens, laser switching crystals, filter clogging plates and gathering lens in order. The laser controlling device is characterized in that the front of the gathering lens is provided with an angle adjustable prism. And a light detecting device is positioned besides the prism. One end of the laser diode is connected with the electric power and the other end is connected with the triode of the switching circuit. The laser source device comprises a switching control circuit, a switch circuit and laser diodes. The lasers emitted by the laser source device are gathered by gathering lens then exchanged into lasers of different frequencies and waves by the laser switching crystals, and the triode can generate amplifying laser current flow, thereby the laser diode can emit the lasers with proper power. The utility model can prevent the drawback of the prior laser modules effectively. The utility model not only provides for a better laser module structure which can control the laser power automatically, but also is small in volume with reduced cost, thereby being more economical and practical.

Description

Laser control apparatus

Technical field

The utility model relates to a kind of laser control apparatus, refers to a kind of laser module with automatic control laser power especially.

Background technology

It is very extensive that laser is used, as be used for excimer laser medically, be used for CD-ROM device and printer laser, or the laser, the laser level that are used for calibration instrument indicate instrument or the like.The laser stylus is used more at present, its laser spot or light are redness, developed at present and green and blue laser, though green and blue laser power height, effective, because of the cost height generally uses, moreover green laser have that power varies with temperature and the shortcoming that changes so must collocation refrigerator or the cooling of other heat abstractors, to keep power stability output.The laser modular structure of commonly using as shown in Figure 1, this laser module 10 has a housing 11, this housing 11 has a Laser emission end 111, can penetrate for green laser L1, be provided with a circuit board 12 in the housing, circuit board one end is provided with a Laser room 13, Laser room has a laser diode 14 that can send ruddiness, this laser diode 14 is towards a laser crystal 15, laser crystal is provided with crystal cover 151 outward, and crystal overlaps 151 front ends and is provided with a lens combination 16, and this lens combination 16 comprises concavees lens 161, one filter sheet 162, convex lens 163.Concavees lens 161 are arranged in the eyeglass cover 164, filter 162 is embedded at eyeglass and overlaps in the set pedestal 165 in 164 the place aheads, the infrared laser that laser diode 14 is sent is converted to green laser by laser crystal 15, expand light and focus on via concavees lens 161, filter 162, convex lens 163 in regular turn again and handle, the Laser emission end 111 by housing 11 penetrates again.Be provided with the refrigerator 20 that to keep proper temperature in laser crystal 15 bottoms, make green laser keep the best power output state.But the setting of refrigerator causes such laser module 10 to have following shortcoming: 1, the refrigerator volume is big, takes up space; Hinder the module miniaturization; 2, cost height; 3, the refrigerator power consumption is big, and its power consumption is equivalent to the power consumption of laser semiconductor, is not suitable for the battery powered type laser designator of carrying especially.Except high temperature can reduce the power of green laser, also can be subjected to the influence of other external factor to cause power output unstable, make laser intensity flickering, this moment, refrigerator cut little ice.

Summary of the invention

The purpose of this utility model provides a kind of laser control apparatus, and a kind of laser module with automatic control laser power specifically is provided, to reach the purpose of laser stabilization output.

The purpose of this utility model is achieved by the following technical solution: laser control apparatus, comprise laser light-source device, laser light-source device the place ahead is disposed with focusing lens, laser conversion crystal, filter plate and gathering eyeglass, be provided with the prism of an adjustable angle in the place ahead of assembling eyeglass, the other photodetector that is provided with of prism, laser diode one end connects power supply VCC, and the other end connects the triode of on-off circuit.

Laser light-source device comprises ON-OFF control circuit, on-off circuit and laser diode, wherein ON-OFF control circuit mainly is made up of photodetector, bleeder circuit, adjustable resistance circuit and potential comparator, photodetector wherein, adjustable resistance circuit are connected to the negative pole of potential comparator, bleeder circuit is connected to the positive pole of potential comparator, and potential comparator connects triode.

After laser light-source device emission laser line focus eyeglass is assembled, change the laser that crystal transition becomes different frequency and wavelength by laser, most of laser sees through via filter plate, forms a beam emissions through the gathering eyeglass and goes out; Prismatic adjustment is arrived suitable angle, the laser beam that sees through prism is launched, the laser that does not see through prism then reflexes to photodetector, to detect the power of laser, by photodetector back coupling power, and then by bleeder circuit and adjustable resistance circuit adjustment resistance value, potential comparator is adjusted to appropriate location and sends and is fit to the required electric current of laser, triode produces the amplifying laser electric current, and laser and via laser conversion crystal makes laser diode launch well-lit laser.

Actual effect of the present utility model is: the shortcoming of effectively avoiding existing laser module, by adjustable prism to suitable reflection angle, can't pass through the laser-bounce of filter mirror to photodetector, to detect the power of laser, potential comparator is adjusted to suitably and sends the required electric current of suitable laser, function with automatic control laser power reaches the purpose that laser stabilization is exported.The design not only provides better laser modular structure, and saves refrigerator or heat abstractor required cost, space, is suitable for the microminiaturization of green laser module, and has reduced power consumption, and is economical and practical.

Description of drawings

Fig. 1 is a structural arrangements synoptic diagram of commonly using the laser module;

Fig. 2 is a structure block schematic diagram of the present utility model;

Fig. 3 is a structural arrangements synoptic diagram of the present utility model;

Fig. 4 is the structure block schematic diagram of laser light-source device of the present utility model;

Fig. 5 is the adjustment structure block schematic diagram of laser light-source device of the present utility model;

Fig. 6 is a circuit diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is elaborated.

See also Fig. 2, Fig. 3, as seen from the figure, the utility model mainly comprises: laser light-source device 3, laser light-source device 3 front ends are provided with focusing lens 4, laser conversion crystal 5, filter plate 6 successively, assemble eyeglass 7, assemble the prism 8 that eyeglass 7 the place aheads are provided with adjustable angle, the other photodetector 30 that is provided with of prism.Laser light-source device 3 emission laser are assembled via focusing lens 4 in regular turn, laser conversion crystal 5, filter plate 6, make LASER Light Source assemble the back is converted to different frequency and wavelength by laser conversion crystal 5 laser, relend by filter plate 6 filtering, make most of permeable LASER Light Source form a light beam after prism 8 transmits single colored light through assembling eyeglass 7 gatherings, the laser that fraction fails to see through, then reflex to the photodetector 30 of laser light-source device, the power of the photodetector 30 detection laser light sources that prism is other via the reflection angle of prism 8.This photodetector 30 is connected with its circuit.

Please consult Fig. 4～Fig. 6 again.As seen from the figure, laser light-source device 3 mainly is made up of photodetector 30, potential comparator 31, triode 32, laser diode 33, bleeder circuit 34 and adjustable resistance circuit 35, photodetector 30 wherein, adjustable resistance circuit 35 are connected to the negative pole of potential comparator 31, bleeder circuit 34 is connected to the positive pole of potential comparator 31, and potential comparator 31 connects triode 32 and laser diode 33.Laser diode 33 1 ends connect power supply VCC, and the other end connects the triode 32 of on-off circuit.The luminosity power of the LASER Light Source of photodetector 30 detection of reflected, multiple dividing potential drop by bleeder circuit 34 (R1 and R2), make the anode of potential comparator 31 get input voltage, and cooperate the VR (variable resistor) of adjustable resistance circuit 35 (VR, R3) to adjust proper resistor, make potential comparator 31 produce suitable electric current (IB) through triode 32 (Q, R4), the electric current of this electric crystal Q produces the laser that laser current (IC=ID) excitation laser diode 33 is launched suitable luminosity through amplifying.Thereby can control the function of laser power automatically, reach the purpose of laser stabilization output.

Claims

1, laser control apparatus, comprise laser light-source device [3], laser light-source device [3] the place ahead is disposed with focusing lens [4], laser conversion crystal [5], filter plate [6] and assembles eyeglass [7], it is characterized in that: the prism [8] that is provided with an adjustable angle in the place ahead of assembling eyeglass [7], the other photodetector [30] that is provided with of prism, laser diode [33] one ends connect power supply VCC, and the other end connects on-off circuit, and on-off circuit is triode [32].

2, laser control apparatus according to claim 1, it is characterized in that: laser light-source device [3] comprises ON-OFF control circuit, on-off circuit and laser diode [33], wherein ON-OFF control circuit mainly is made up of photodetector [30], bleeder circuit [34], adjustable resistance circuit [35] and potential comparator [31], photodetector wherein [30], adjustable resistance circuit [35] are connected to the negative pole of potential comparator [31], bleeder circuit [34] is connected to the positive pole of potential comparator [31], and potential comparator [31] connects triode [32].