TWI605788B - Laser apparatus - Google Patents

Description

Laser device

The present disclosure relates to a laser device, and more particularly to a laser device having a plurality of light bars or light guide bars arranged in a ring or symmetry.

The application of lasers in medical applications is becoming more and more extensive, such as instrument scanning, surgery, sterilization, etc., and handheld laser devices are the future development trend. However, most of the handheld laser devices are composed of two skeletons, which not only increase the weight of the user, but also cause inconvenience to the movement. In addition, when the laser is fired, the laser crystal (resonance cavity) needs High-voltage drive is also the cause of increased risk.

At present, in the laser medical equipment, the structure of the handheld laser device is usually a flash lamp as a laser pump source, and the flash lamp is arranged in parallel with the laser crystal, and lateral excitation is utilized. In this way, the laser crystal is irradiated, and the laser beam is output through the laser crystal.

In particular, the appearance of a typical handheld laser device is 90 degrees connected by two active skeletons, while the laser crystal (resonant cavity) is placed in the second section of the skeleton, and the laser crystal is transmitted through the dihedral mirror. The output laser beam is conducted to the first section skeleton. However, since the flash lamp tube is arranged in parallel with the laser crystal (resonant cavity), and both need to be cooled by the aqueous solution, the hand is held. The size of the laser device cannot be reduced, resulting in a large volume and heavy weight.

Furthermore, in the lighting of the flash lamp, since the two-end electrode of the flash lamp requires a high-voltage power supply of several hundred volts, if the electrode and the metal are in contact with each other, a short circuit may occur, or after the flash lamp is used for a long time, the two ends The insulation on the periphery of the electrode is also prone to aging. At this time, the handheld laser device will be filled with high-voltage power, which will endanger the safety of the user.

In addition, in the case of a flash lamp, the wavelength of the flash lamp is between 220 and 280 nm, and the absorption spectrum of the laser crystal is rather narrow. Under the flash lamp with the laser crystal, it is easy to cause excessive light. Conversion to a heat source makes laser conversion performance difficult to improve.

Therefore, how to solve the above problems of the prior art has become one of the major problems of those skilled in the art.

The present disclosure provides a laser device that enhances the illumination of a laser crystal or the output of a laser beam.

A laser device of the present disclosure includes: a housing having an annular or polygonal inner wall; a laser crystal disposed in the housing and located adjacent to or adjacent to the annular or polygonal shape of the housing a center of the inner wall; and at least two light bars disposed in the housing and located at or adjacent to the inner wall of the annular or polygonal shape of the housing, wherein the light bars are arranged in a ring shape or symmetrically arranged thereon The laser crystal is surrounded and irradiated with light to the laser crystal to output a laser beam through the laser crystal.

Another laser device of the present disclosure includes: a casing having an annular or polygonal inner wall; and a laser crystal disposed in the casing and in position At or adjacent to a center of the annular or polygonal inner wall of the housing; and at least two light guiding strips disposed in the housing and located adjacent to or adjacent to the annular or polygonal inner wall of the housing, wherein The light guiding strips are arranged in a ring shape or symmetrically arranged around the laser crystal, and respectively irradiate light to the laser crystal to output a laser beam through the laser crystal.

It can be seen from the above that in the laser device of the present disclosure, the plurality of light bars or light guiding strips are arranged annularly or symmetrically around the laser crystal, and respectively irradiate light to the laser crystal to output a laser beam. Thereby, the receiving illumination of the laser crystal, the conversion performance or the output performance of the laser beam is improved.

The above described features and advantages of the present invention will be more apparent from the following description. Additional features and advantages of the present invention will be set forth in part in the description. The features and advantages of the present invention are realized and attained by the elements and combinations particularly pointed out in the appended claims. It is to be understood that both the foregoing general description and

1, 1a, 1b‧‧‧ laser device

2, 20‧‧‧ shell

21‧‧‧ inner wall

22‧‧‧ Center

23‧‧‧ accommodating space

3‧‧‧Laser crystal

30‧‧‧Laser beam

31‧‧‧ first end face

32‧‧‧second end face

41‧‧‧First film

42‧‧‧Second film

5‧‧‧Light strips

5a‧‧‧Lighting diode

5b‧‧‧Light guide strip

50‧‧‧Light

51‧‧‧Loading Department

52‧‧‧Lighting Department

53‧‧‧Bevel

54‧‧‧V-groove

61‧‧‧ Mercury source

62‧‧‧Multi-core fiber

71‧‧‧ Focusing mirror

72‧‧‧Mirror

73‧‧‧ Output

D‧‧‧ Direction

‧‧‧‧ angle

、, θ‧‧‧ angle

1A and 1B are respectively a cross-sectional view of the laser device of the present disclosure in two different directions; FIGS. 2A to 2F are respectively different aspects of the laser device of the first embodiment of the present disclosure. 3A and 3B are respectively a cross-sectional view of the laser device of the first embodiment in two different directions; 4A and 4B are respectively a cross-sectional view of the laser device according to the second embodiment of the present disclosure in two different directions; and FIG. 5 is a partially enlarged view of the laser device of the fourth embodiment; Figure 6 is a comparison of a laser device of the present disclosure with a hand-held laser device of the prior art.

The embodiments of the present disclosure are described in the following specific embodiments, and those skilled in the art can easily understand other advantages and functions of the disclosure by the contents disclosed in the specification, and can also be implemented by other different embodiments. Or application.

1A and 1B are cross-sectional views of the laser device 1 of the present disclosure in two different directions, such as lateral and forward directions, respectively. As shown, the laser device 1 can be a handheld laser device, and can be the laser device 1a of the first embodiment of FIG. 3A to FIG. 3B, or the second of the 4A to 4B drawings. The laser device 1b of the embodiment is not limited thereto.

As shown in FIGS. 1A and 1B, the laser device 1 mainly includes a casing 2, a laser crystal 3 and at least two light bars 5, for example, FIG. 1A shows a six light bar 5. The housing 2 has an annular or polygonal inner wall 21. The ring may be circular or elliptical, etc., and the polygon may be a quadrangle, a pentagon, a hexagon, or other polygons, see Figures 2A through 2F.

The laser crystal 3 is disposed in the housing 2 and is located at or adjacent to the center 22 of the annular or polygonal inner wall 21 of the housing 2. The laser crystal 3 can be a laser gain medium. The light strips 5 are disposed on The housing 2 is located at or adjacent to the annular or polygonal inner wall 21 of the housing 2. The light bars 5 may be arranged in a ring shape or symmetrically arranged around the laser crystal 3, and respectively illuminate the light 50 to the laser crystal 3 to excite the laser crystal 3 to output a laser beam 30.

The housing 2 can have an accommodating space 23, and the accommodating space 23 can be filled with a cooling liquid (not shown) to reduce the temperature of the laser crystal 3 and the light bar 5 by the cooling liquid. . The coolant may be cooling water or a coolant containing a cold gel. Moreover, the laser device 1 can be connected to a water circulation system (not shown) to the accommodating space 23 of the casing 2 to supply and circulate the coolant through the water circulation system.

The laser device 1 may include a first film 41 and a second film 42. The first film 41 and the second film 42 are respectively formed on the first end surface 31 and the second end surface 32 of the laser crystal 3, and the first film 41, the laser crystal 3 and the second film 42 are common. Form a resonant cavity.

The first film 41 can serve as a first mirror, and the first film 41 has a wavelength of 940 to 990 nanometers (nm) of total reflection and a wavelength of 2650 to 3000 nm of total reflection. The second film 42 can serve as a second mirror, and the second film 42 has a wavelength of 940 to 990 nm for total reflection and a wavelength of 2650 to 3000 nm for partial reflection. The partial reflection of the second film 42 may reflect a reflectance of 90% to 99%, and the laser crystal 3 may output the laser beam 30 through the second film 42 without limitation.

In addition, the laser device 1 can include a housing 20, a focusing mirror 71, a mirror 72 and an output end 73. The housing 20 can be coupled to the housing 2, and the focusing mirror 71 is located in the housing 20 and corresponds to the second film 42. A mirror 72 is located in the housing 20 and corresponds to the focusing mirror 71. The output end 73 is located outside the housing 20 and corresponds to the mirror 72. Moreover, the focusing mirror 71 can focus the laser beam 30 outputted by the laser crystal 3 through the second film 42 into the mirror 72, and the focusing mirror 71 is focused by the mirror 72. The laser beam 30 is reflected or outputted outside of the output terminal 73.

2A to 2F are respectively different aspects of the laser device 1 of the first embodiment, and the laser device 1 of the 2A to 2F can be applied to the 3A to 3B. The laser device 1a is in the laser device 1b of FIGS. 4A to 4B.

As shown in FIG. 2A, the housing 2 of the laser device 1 can have an annular inner wall 21, and the laser device 1 can have two light bars 5. As shown in FIG. 2B, the housing 2 can have an annular inner wall 21, and the laser device 1 can have three light bars 5. As shown in FIG. 2C, the housing 2 can have an annular inner wall 21, and the laser device 1 can have four light bars 5.

Further, as shown in FIG. 2D, the housing 2 may have an annular inner wall 21, and the laser device 1 may have five light bars 5. As shown in FIG. 2E, the housing 2 can have a pentagonal inner wall 21, and the laser device 1 can have five light bars 5. As shown in FIG. 2F, the housing 2 may have a hexagonal inner wall 21, and the laser device 1 may have six light bars 5.

The angle θ at which the above-mentioned light bar 5 (or the following light guiding strip 5b) is spaced apart from each other can be calculated according to the calculation formula θ=360°/N±10%, where N is the number of the light bars 5. Taking FIG. 2B as an example, the angle between the three light bars 5 is θ=360°/3±10%, that is, the angle θ can be between 132 degrees (ie 120 degrees plus 12 degrees) to Between 108 degrees (ie 120 degrees minus 12 degrees).

3A and 3B are cross-sectional views showing the laser device 1a of the first embodiment in two different directions (such as lateral and forward directions), respectively. As shown in the figure, each of the light bars 5 of the above-mentioned 1A to 2F diagrams may be formed by connecting a plurality of light-emitting diodes (LEDs) 5a in series, or each of the light-emitting strips 5 may be a plurality of light-emitting diodes (LEDs). 5a is arranged, and each of the light bars 5 can also be a light-emitting diode (LED) lamp. Each of the light-emitting diodes 5a may have a carrying portion 51 and a light-emitting portion 52. The light-emitting portion 52 or the LED tube of the light-emitting diodes 5a may generate the light 50 to illuminate the laser crystal 3.

The wavelength of the light-emitting diodes 5a may be between 950 and 980 nm, and is higher than the wavelength of the flash lamp of the prior art (between 220 and 280 nm). Therefore, the present invention can reduce the conversion of the light 50 into a heat source by using the light-emitting diodes 5a with the laser crystal 3, and enhance the conversion performance of the light 50 into the laser beam 30.

4A and 4B are respectively a cross-sectional view of the laser device 1b according to the second embodiment in two different directions (such as lateral and forward), and FIG. 5 is a diagram showing the fourth embodiment of the disclosure. A partially enlarged view of the laser device 1b.

As shown in Figs. 4A to 4B, the laser device 1b may have at least two light guiding strips 5b, as shown in Fig. 4A to show six light guiding strips 5b. The light guiding strip 5b can have a slope 53 and a plurality of V-shaped grooves 54 facing or contacting the annular or polygonal inner wall 21 of the casing 2, and the V-shaped grooves 54 face the laser. Crystal 3.

As shown in Fig. 4B, the V-shaped grooves 54 of the light guiding strip 5b may have the same size or the same angle β (see Fig. 5). Or, as shown in Figure 5 As shown, the V-shaped grooves 54 of the light guiding strip 5b can be arranged from the dense to the dense or from the largest to the smallest according to the direction D.

As shown in FIG. 5, the angle α between the inclined surface 53 of the light guiding strip 5b and the annular or polygonal inner wall 21 of the casing 2 may be between 1 and 20 degrees, such as 1, 5, and 10. , 15 or 20 degrees. Moreover, the angle β of the V-shaped grooves 54 of the light guiding strip 5b may be between 5 degrees and 85 degrees, such as 20, 40, 60 or 80 degrees.

As shown in FIGS. 4B to 5, the laser device 1b may include a mercury source 61 and a multi-core fiber 62. The multi-core fiber 62 is connected to the merging source 61 and the light guiding strips 5b, respectively, and the illuminating light source 61 generates the ray 50 to conduct the ray 50 through the multi-core fiber 62 to the light guiding strips 5b, and The light rays 50 are sequentially transmitted to the laser crystal 3 through the inclined surface 53 of the light guiding strip 5b and the V-shaped grooves 54.

The mercury ray source 61 can be a laser diode (LD). The wavelength of the laser diode can be between 965 and 980 nm and is higher than the wavelength of a conventional flash lamp (between 220 and 280 nm). Therefore, in the present disclosure, the laser diode 3 and the light guiding strip 5b are matched with the laser crystal 3 to reduce the conversion of the light 50 into a heat source, and to enhance the conversion efficiency of the light 50 into the laser beam 30.

6 is a comparison table of the laser device 1a of the first embodiment, the laser device 1b of the second embodiment, and the hand-held laser device of the prior art.

As shown in the figure, in terms of size, in the above-mentioned hand-held laser device of the prior art, the inner wall of the casing has a diameter of about 3 cm; On the other hand, in the laser device 1a of the first embodiment, the diameter (in the case of a ring shape) of the inner wall 21 of the casing 2 is about 2.3 cm, and in the laser device 1b of the second embodiment, the casing The diameter of the inner wall 21 of 2 (in the form of a ring) is about 2 cm. Therefore, the size of the laser device 1a (1b) of the present disclosure can be smaller than that of the prior art handheld laser device.

In terms of weight, in the handheld laser device of the prior art, the housing, the lamp tube, the laser crystal and the aqueous solution total about 300 gram; otherwise, in the laser device 1a of the first embodiment, the housing 2 The light-emitting diode 5a, the laser crystal 3 and the cooling liquid in the accommodating space 23 have a total of about 220 grams, and in the laser device 1b of the second embodiment, the housing 2, the light guiding strip 5b, and the laser crystal 3 and a total of about 200 grams of coolant in the accommodating space 23. Therefore, the weight of the laser device 1a (1b) of the present disclosure can be lighter than the weight of a conventional hand-held laser device.

In terms of danger, in the handheld laser device of the prior art, the two end electrodes of the laser crystal have a voltage of several hundred volts; conversely, in the laser device 1a of the first embodiment, only the light emitting diode is The DC voltage of the body 5a (3 to 24 volts), and in the laser device 1b of the second embodiment, only the light 50 conducted by the multi-core fiber 62 and the light guiding strip 5b is voltage-free. Therefore, the risk of the laser device 1a (1b) of the present disclosure can be lower than that of the conventional hand-held laser device.

In the handheld laser device of the prior art, the receiving illuminance of the laser lens is about 3,600 watts/m ² (W/m ² ); otherwise, in the laser device 1a of the first embodiment, The receiving illuminance of the laser crystal 3 is about 6000 watts/square meter (W/m ² ), and in the laser device 1b of the second embodiment, the receiving illuminance of the laser crystal 3 is about 7000 watts/square meter (W/ m ² ). Therefore, the receiving illuminance of the laser device 1a (1b) of the present disclosure can be higher than the receiving illuminance of the handheld laser device of the prior art.

It can be seen from the above that in the laser device of the present disclosure, the plurality of light bars or light guiding strips are arranged annularly or symmetrically around the laser crystal, and respectively irradiate light to the laser crystal to output a laser beam. Thereby, the receiving illumination of the laser crystal, the conversion performance or the output performance of the laser beam is improved. Meanwhile, as can be seen from the comparison table of FIG. 6, the laser device of the present disclosure can have a smaller size, a lighter weight, a lower risk, and a higher receiving illumination.

The above-described embodiments are merely illustrative of the principles, features, and functions of the present disclosure, and are not intended to limit the scope of the present disclosure. Any person skilled in the art can practice the above without departing from the spirit and scope of the disclosure. The embodiment is modified and changed. Any equivalent changes and modifications made by the disclosure of the present disclosure should still be covered by the following claims. Therefore, the scope of protection of this disclosure should be as set forth in the scope of the patent application.

1‧‧‧ Laser device

2, 20‧‧‧ shell

21‧‧‧ inner wall

23‧‧‧ accommodating space

3‧‧‧Laser crystal

30‧‧‧Laser beam

31‧‧‧ first end face

32‧‧‧second end face

41‧‧‧First film

42‧‧‧Second film

5‧‧‧Light strips

50‧‧‧Light

71‧‧‧ Focusing mirror

72‧‧‧Mirror

73‧‧‧ Output

Claims (16)

A laser device comprising: a housing having an annular or polygonal inner wall; a laser crystal disposed in the housing and located adjacent to or adjacent to the inner or outer wall of the housing a center of at least two light bars disposed in the housing and located adjacent to or adjacent to the inner wall of the annular or polygonal shape of the housing, wherein the light bars are arranged in a ring shape or symmetrically arranged on the laser crystal Surrounding, and respectively irradiating light to the laser crystal to output a laser beam through the laser crystal; and a first film and a second film respectively formed on the opposite first end and the second end of the laser crystal On the end surface, the first film, the laser crystal and the second film together form a resonant cavity. The laser device of claim 1, wherein the housing further has an accommodating space, and the accommodating space is filled with a cooling liquid to lower the laser crystal by the cooling liquid The temperature of these light bars. The laser device of claim 1, wherein the first film serves as a first mirror, and the first film has a total reflection of 940 to 990 nm, and a total reflection of 2650 to 3000 The wavelength of the nanometer. The laser device of claim 1, wherein the second film serves as a second mirror, and the second film has a total reflection of 940 to 990 nm wavelength and a partial reflection of 2650 to 3000 Nai The wavelength of the meter. The laser device of claim 4, wherein the portion of the second film reflects a reflectance of 90% to 99%, and the laser crystal outputs the laser beam through the second film. The laser device of claim 1, wherein the angle θ of the light bars spaced apart from each other is calculated according to the following formula: θ=360°/N±10%, where N is the number of the light bars. . The laser device of claim 1, wherein each of the light bars is formed by arranging or arranging a plurality of light emitting diodes, and the light emitting diodes generate the light to illuminate the laser crystal. The laser device of claim 7, wherein the light emitting diodes have a wavelength between 950 and 980 nm. The laser device of claim 1, wherein each of the light bars is an LED tube, and the LED tubes generate the light to illuminate the laser crystal. A laser device comprising: a housing having an annular or polygonal inner wall; a laser crystal disposed in the housing and located adjacent to or adjacent to the inner or outer wall of the housing And at least two light guiding strips disposed in the housing and located at or adjacent to the inner wall of the annular or polygonal shape of the housing, wherein the light guiding strips are arranged in a ring shape or symmetrically arranged thereon The laser crystal is surrounded and irradiated with light to the laser crystal to output a laser beam through the laser crystal. The laser device of claim 10, wherein the light guiding strip has a slope and a plurality of V-shaped grooves facing or contacting the inner wall of the ring or the polygon of the casing, and the V The groove faces the laser crystal. The laser device of claim 11, wherein an angle between the slope of the light guiding strip and the inner wall of the annular or polygonal shape of the housing is between 1 and 20 degrees. The laser device of claim 11, wherein the V-shaped grooves of the light guiding strip have an angle of between 5 and 85 degrees. The laser device of claim 11, wherein the V-shaped grooves of the light guiding strip have the same size or are arranged in a dense to dense manner. The laser device of claim 10, further comprising a mercury source and a multi-core fiber, wherein the multi-core fiber is respectively connected to the mercury source and the light guide strips, and the mercury source generates the light The light is transmitted to the light guiding strips through the multi-core optical fiber, and the light is sequentially transmitted to the laser crystal through the inclined surface of the light guiding strip and the V-shaped grooves. The laser device of claim 15, wherein the mercury source is a laser diode, and the wavelength of the laser diode is between 965 and 980 nm.