TW201815360A - Laser apparatus - Google Patents

Abstract

A laser apparatus is provided, which comprises a housing, a laser crystal and at least two light bars. The housing has an annular or polygonal inner wall. The laser crystal is disposed in the housing, and located at or adjacent a center of the annular or polygonal inner wall of the housing. The light bars are disposed in the housing, and located at or adjacent to the annular or polygonal inner wall of the housing. The light bars are annularly or symmetrically arranged around the laser crystal, and irradiate light to the laser crystal to output a laser beam through the laser crystal, respectively.

Description

   Laser device   

This disclosure relates to a laser device, and particularly to a laser device having a plurality of circular or symmetrically arranged light bars or light guide bars.

Lasers are becoming more and more widely used in medical applications, such as instrument scanning, surgery, and sterilization, and handheld laser devices are the future development trend. However, most hand-held laser devices are mostly composed of two-section skeletons. Not only the heavy weight will increase the burden on the user, but also cause inconvenience in movement. In addition, when the laser is fired, the laser crystal (resonant cavity) needs High-voltage drive is also the reason for increased danger.

In the current laser medical equipment, the structure of a handheld laser device usually uses a flash lamp tube as a laser pump source, and arranges the flash lamp tube and the laser crystal in parallel, and uses lateral excitation. In this way, the laser crystal is irradiated, and the laser beam is output through the laser crystal.

In detail, the appearance of a general handheld laser device is 90 degrees connected by two movable skeletons, while the laser crystal (resonant cavity) is placed in the second section skeleton, and the laser crystal is transmitted through a two-sided mirror. The output laser beam is transmitted to the first section skeleton. However, because the flash lamp tube and the laser crystal (resonant cavity) are arranged in parallel, and both of them need to be cooled by an aqueous solution, the size of the handheld laser device cannot be reduced, resulting in a large volume and heavy weight.

In addition, in the lighting of the flash tube, the two ends of the flash tube require a high-voltage power source of several hundred volts, so if the electrodes and metal contact each other, it will cause a short circuit, or after long-term use of the flash tube, The insulating skin around the electrodes is also easy to age and fall off. At this time, the handheld laser device will be flooded with high voltage power, which will endanger the safety of the user.

In addition, with regard to flash lamp tubes, the wavelength of the flash lamp tube is between 220 and 280 nanometers, and the absorption spectrum of the laser crystal is quite narrow. When the flash lamp tube is matched with the laser crystal, it is easy to cause excessive light. Transformed into a heat source, making it difficult to improve laser conversion efficiency.

Therefore, how to solve the problems of the conventional technology has become a major issue for those skilled in the art.

This disclosure provides a laser device that can improve the receiving illuminance of a laser crystal or the output efficiency of a laser beam.

A laser device disclosed in this disclosure includes: a casing having an inner wall of a ring shape or a polygon; and a laser crystal disposed in the casing and located at or adjacent to the ring or polygon of the case. The center of the inner wall; and at least two light bars disposed in the housing and located on or adjacent to the annular or polygonal inner wall of the housing, wherein the light bars are arranged circularly or symmetrically on the Around the laser crystal, irradiate light to the laser crystal to output a laser beam through the laser crystal.

Another laser device disclosed in the present disclosure includes: a casing having an annular or polygonal inner wall; and a laser crystal disposed in the casing and located at or adjacent to the annular or polygon of the casing. The center of the inner wall of the inner wall; and at least two light guide strips, which are arranged in the housing and are located on or near the annular or polygonal inner wall of the housing, wherein the light guide bars are arranged in a circle or are symmetrical It is arranged around the laser crystal and irradiates light to the laser crystal to output a laser beam through the laser crystal.

As can be seen from the above, in the laser device disclosed in the present disclosure, a plurality of light bars or light guide bars are arranged in a ring or symmetrically around the laser crystal, and the light is irradiated to the laser crystal to output a laser beam. Thereby, the receiving illuminance of the laser crystal, the conversion efficiency or the output efficiency of the laser beam are improved.

In order to make the above-mentioned features and advantages of the disclosure more comprehensible, embodiments are exemplified below and described in detail with reference to the accompanying drawings. In the following description, additional features and advantages of the present disclosure will be partially explained, and these features and advantages will be partly obvious from the description, or can be acquired through practice of the present disclosure. The features and advantages of this disclosure are recognized and achieved by means of elements and combinations specifically pointed out in the scope of the patent application. It should be understood that both the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the scope of the present disclosure.

1, 1a, 1b ‧‧‧ laser device

2, 20‧‧‧ shell

21‧‧‧Inner wall

22‧‧‧ Center

23‧‧‧accommodation space

3‧‧‧laser crystal

30‧‧‧laser beam

31‧‧‧first end

32‧‧‧Second end face

41‧‧‧first film

42‧‧‧Second film

5‧‧‧ light bar

5a‧‧‧light-emitting diode

5b‧‧‧light guide

50‧‧‧ light

51‧‧‧bearing department

52‧‧‧Lighting Department

53‧‧‧ bevel

54‧‧‧V-shaped groove

61‧‧‧ Mercury light source

62‧‧‧Multicore Fiber

71‧‧‧ focusing lens

72‧‧‧Reflector

73‧‧‧output

D‧‧‧ direction

α‧‧‧ Angle

β, θ‧‧‧ angle

Figures 1A and 1B are sectional views of the laser device of the present disclosure in two different directions; Figures 2A to 2F are different views of the laser device of Figure 1A respectively. Figures 3A and 3B are sectional views of the laser device of the first embodiment of the disclosure in two different directions; Figures 4A and 4B respectively show the laser of the second embodiment of the disclosure; Sectional views of the device in two different directions; Figure 5 is a partial enlarged view of the laser device of Figure 4B of this disclosure; and Figure 6 is a hand-held laser of the disclosed laser device and conventional technology Comparison table of radio equipment.

The following describes the implementation of the disclosure through specific specific implementation forms. Those familiar with this technology can easily understand other advantages and effects of the disclosure from the content disclosed in this description, and can also be implemented by other different specific implementation forms. Or apply.

FIG. 1A and FIG. 1B are sectional views of the laser device 1 of the present disclosure in two different directions (such as a lateral direction and a forward direction). As shown in the figure, the laser device 1 may be a handheld laser device, and may be the laser device 1a of the first embodiment shown in FIGS. 3A to 3B, or the second device of FIGS. 4A to 4B. 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 housing 2, a laser crystal 3, and at least two light bars 5. For example, FIG. 1A shows six light bars 5. The casing 2 has an annular or polygonal inner wall 21. The ring may be a circle or an ellipse, and the polygon may be a quadrangle, a pentagon, a hexagon, or other polygons. See FIGS. 2A to 2F.

The laser crystal 3 is disposed in the casing 2 and is located at or near the center 22 of the annular or polygonal inner wall 21 of the casing 2. The laser crystal 3 may be a laser gain medium. The light bars 5 are arranged in the casing 2 and are located on or adjacent to the annular or polygonal inner wall 21 of the casing 2. The light bars 5 may be arranged in a circle or symmetrically around the laser crystal 3, and irradiate light 50 to the laser crystal 3 to excite the laser crystal 3 to output a laser beam 30.

The housing 2 may have an accommodating space 23, and the accommodating space 23 may be filled with a cooling liquid (not shown) to reduce the temperature of the laser crystal 3 and the light bars 5 by the cooling liquid. . The cooling liquid may be cooling water or a cooling liquid 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 cooling liquid through the water circulation system light.

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

The first film 41 can be used as a first mirror, and the first film 41 has a total reflection wavelength of 940 to 990 nanometers (nm) and a total reflection wavelength of 2650 to 3000 nanometers. The second film 42 can be used as a second reflector, and the second film 42 has a wavelength of 940 to 990 nm in total reflection and a wavelength of 2650 to 3000 nm in partial reflection. The reflectivity of the partial reflection of the second film 42 may be 90% to 99%, and the laser crystal 3 may output the laser beam 30 through the second film 42, but not limited thereto.

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

Figures 2A to 2F show different aspects of the laser device 1 of Figure 1A, and the laser device 1 of Figures 2A to 2F can be applied to Figures 3A to 3B. The laser device 1a and the laser device 1b of FIGS. 4A to 4B are shown in FIG.

As shown in FIG. 2A, the housing 2 of the laser device 1 may have a ring-shaped inner wall 21, and the laser device 1 may have two light bars 5. As shown in FIG. 2B, the housing 2 may have a ring-shaped inner wall 21, and the laser device 1 may have three light bars 5. As shown in FIG. 2C, the housing 2 may have a ring-shaped inner wall 21, and the laser device 1 may have four light bars 5.

In addition, as shown in FIG. 2D, the casing 2 may have a ring-shaped inner wall 21, and the laser device 1 may have five light bars 5. As shown in FIG. 2E, the housing 2 may have a pentagonal inner wall 21, and the laser device 1 may have a five light bar 5. As shown in FIG. 2F, the housing 2 may have a hexagonal inner wall 21, and the laser device 1 may have a six light bar 5.

The angle θ between the light bars 5 (or the following light guide bars 5b) 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 Figure 2B as an example, the angle between the three light bars 5 spaced from each other θ = 360 ° / 3 ± 10%, that is, the angle θ can be between 132 degrees (that is, 120 degrees plus 12 degrees) to 108 degrees (that is, 120 degrees Minus 12 degrees).

3A and 3B are sectional views of the laser device 1a according to the first embodiment of the disclosure in two different directions (such as a lateral direction and a forward direction). As shown in the figure, each of the light bars 5 in FIGS. 1A to 2F may be a plurality of light emitting diodes (LEDs) 5a connected in series, or each light bar 5 may be a plurality of light emitting diodes (LEDs) ) 5a is arranged, and each light bar 5 may also be a light emitting diode (LED) tube. Each of the light-emitting diodes 5 a can have a bearing portion 51 and a light-emitting portion 52. The light-emitting portion 52 or the LED tube of the light-emitting diodes 5 a can generate the light 50 to illuminate the laser crystal 3.

The wavelength of the light-emitting diodes 5a can be between 950 and 980 nanometers, which is higher than the wavelength of the flash lamp tube of the conventional technology (between 220 and 280 nanometers). Therefore, the disclosure using the light emitting diodes 5a and the laser crystal 3 can reduce the conversion of the light 50 into a heat source, and improve the conversion efficiency of the light 50 into the laser beam 30.

4A and 4B are cross-sectional views of the laser device 1b of the second embodiment of the present disclosure in two different directions (such as lateral and forward), and FIG. 5 is a drawing of FIG. 4B of the present disclosure. An enlarged view of a part of the laser device 1b.

As shown in FIG. 4A to FIG. 4B, the laser device 1b may have at least two light guide bars 5b. As shown in FIG. 4A, six light guide bars 5b are shown. The light guide strip 5 b may have an inclined surface 53 and a plurality of V-shaped grooves 54. The inclined surface 53 faces or contacts the annular or polygonal inner wall 21 of the housing 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 guide strip 5 b may have the same size or the same angle β (see FIG. 5). Alternatively, as shown in FIG. 5, the V-shaped grooves 54 of the light guide strip 5 b may be arranged from sparse to dense or from large to small according to the direction D.

As shown in FIG. 5, the angle α between the inclined surface 53 of the light guide strip 5b and the annular or polygonal inner wall 21 of the housing 2 may be between 1 degree and 20 degrees, such as 1, 5, 10 , 15 or 20 degrees. Moreover, the angle β of the V-shaped grooves 54 of the light guide 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 1 b may include a mercury pump light source 61 and a multi-core optical fiber 62. The multi-core optical fiber 62 is respectively connected to the mercury light source 61 and the light guide bars 5b. The mercury light source 61 generates the light 50 to conduct the light 50 into the light guide bars 5b through the multi-core fiber 62. The light beam 50 passes through the inclined surface 53 and the V-shaped grooves 54 of the light guide strip 5 b in sequence and irradiates the laser crystal 3.

The mercury pump light source 61 may be a laser diode (LD). The wavelength of the laser diode can be between 965 and 980 nanometers, which is higher than the wavelength of the conventional flash lamp tube (between 220 and 280 nanometers). Therefore, the disclosure using the laser diode 61 and the light guide bar 5b with the laser crystal 3 can reduce the conversion of the light 50 into a heat source, and improve the conversion efficiency of the light 50 into the laser beam 30.

FIG. 6 is a comparison table between 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, according to actual measurement results, in terms of size, in the handheld laser device of the above-mentioned conventional technology, the diameter of the inner wall of the casing is about 3 cm; on the contrary, the laser device 1a of the first embodiment of the present disclosure The diameter of the inner wall 21 of the casing 2 (taking the ring as an example) is about 2.3 cm, while in the laser device 1b of the second embodiment, the diameter of the inner wall 21 of the casing 2 (taking the ring as an example) About 2 cm. Therefore, the size of the laser device 1a (1b) disclosed in this disclosure may be smaller than the size of the handheld laser device of the conventional technology.

In terms of weight, in the conventional hand-held laser device, the housing, the lamp tube, the laser crystal and the aqueous solution total about 300 grams; on the contrary, in the laser device 1a of the first embodiment, the housing 2 , The light-emitting diode 5a, the laser crystal 3, and the coolant in the accommodating space 23 total about 220 grams, and in the laser device 1b of the second embodiment, the housing 2, the light guide bar 5b, and the laser crystal The total amount of the coolant in 3 and the accommodating space 23 is about 200 grams. Therefore, the weight of the laser device 1a (1b) disclosed in this disclosure can be lighter than the weight of the handheld laser device of the conventional technology.

In terms of danger, in the hand-held laser device of the conventional technology, the two terminal electrodes of the laser crystal have a voltage of hundreds of volts; on the contrary, in the laser device 1a of the first embodiment of the disclosure, only the light-emitting diode is used. The DC voltage (3 to 24 volts) of the body 5a, and in the laser device 1b of the second embodiment, there is only the light 50 transmitted by the multi-core optical fiber 62 and the light guide bar 5b without voltage. Therefore, the danger of the laser device 1a (1b) disclosed in this disclosure may be lower than the danger of the hand-held laser device of the conventional technology.

In terms of receiving illuminance, in the conventional handheld laser device, the receiving illuminance of the laser crystal is about 3600 watts per square meter (W / m ² ). On the contrary, in the laser device 1a of the first embodiment of the present disclosure, The receiving illuminance of the laser crystal 3 is about 6000 W / m ² (W / m ² ), and in the laser device 1 b of the second embodiment, the receiving illuminance of the laser crystal 3 is about 7000 W / m 2 (W / m ² ). Therefore, the receiving illuminance of the laser device 1a (1b) disclosed in this disclosure may be higher than the receiving illuminance of the handheld laser device of the conventional technology.

As can be seen from the above, in the laser device disclosed in the present disclosure, a plurality of light bars or light guide bars are arranged in a ring or symmetrically around the laser crystal, and the light is irradiated to the laser crystal to output a laser beam. Thereby, the receiving illuminance of the laser crystal, the conversion efficiency or the output efficiency of the laser beam are improved. At the same time, it can be seen from the comparison table in FIG. 6 that the laser device disclosed in the present disclosure can have a smaller size, a lighter weight, a lower risk, and a higher received illumination.

The above-mentioned embodiment merely illustrates the principle, characteristics, and effects of this disclosure by way of example, and is not intended to limit the scope of implementation of this disclosure. Anyone who is familiar with this technique can do the above without departing from the spirit and scope of this disclosure. Modifications and changes to the implementation form. Any equivalent changes and modifications made by using the content disclosed in this disclosure shall still be covered by the scope of patent application described below. Therefore, the scope of protection of the rights in this disclosure should be as listed in the scope of patent application.

Claims (17)

    A laser device includes: a casing having an annular or polygonal inner wall; and a laser crystal disposed in the casing and located at or adjacent to the annular or polygonal inner wall of the casing And at least two light bars disposed in the housing and located on or adjacent to the inner wall of the ring or polygon of the housing, wherein the light bars are arranged circularly or symmetrically on the laser Around the crystal, light is irradiated to the laser crystal to output a laser beam through the laser crystal.         The laser device according to item 1 of the scope of patent application, wherein the housing further has a containing space, and the containing space is filled with a cooling liquid to reduce the laser crystal and the The temperature of these light bars.         The laser device according to item 1 of the patent application scope further includes a first thin film and a second thin film, which are respectively formed on the first and second end faces of the laser crystal, and the first thin film, The laser crystal and the second film together form a resonant cavity.         The laser device according to item 3 of the scope of patent application, wherein the first film serves as a first reflector, and the first film has a total reflection wavelength of 940 to 990 nm, and a total reflection of 2650 to 3000. The wavelength of nanometers.         The laser device according to item 3 of the scope of patent application, wherein the second film serves as a second reflector, and the second film has a total reflection wavelength of 940 to 990 nm, and a partial reflection of 2650 to 3000. The wavelength of nanometers.         The laser device according to item 5 of the scope of the patent application, wherein the part of the second film has a reflectivity of 90% to 99%, and the laser crystal outputs the laser beam through the second film.         The laser device according to item 1 of the scope of patent application, wherein the angle θ between the light bars is calculated according to the following formula: θ = 360 ° / N ± 10%, N is the number of the light bars .         The laser device according to item 1 of the scope of patent application, wherein each of the light bars is formed by connecting or arranging a plurality of light emitting diodes in series, and the light emitting diodes generate the light to illuminate the laser crystal.         The laser device according to item 8 of the scope of patent application, wherein the wavelengths of the light-emitting diodes are between 950 and 980 nm.         The laser device according to item 1 of the scope of the patent application, wherein each of the light bars is a light emitting diode tube, and the light emitting diode tubes generate the light to illuminate the laser crystal.         A laser device includes: a casing having an annular or polygonal inner wall; and a laser crystal disposed in the casing and located at or adjacent to the annular or polygonal inner wall of the casing The center of the light guide; and at least two light guide strips, which are arranged in the housing and are located on or adjacent to the inner wall of the ring or polygon, wherein the light guide bars are arranged in a ring or symmetrically Around the laser crystal, irradiate light to the laser crystal to output a laser beam through the laser crystal.         The laser device according to item 11 of the scope of patent application, wherein the light guide bar has an inclined surface and a plurality of V-shaped grooves, the inclined surface faces or contacts the inner wall of the ring or polygon of the housing, and the The V-shaped groove faces the laser crystal.         The laser device according to item 12 of the scope of patent application, wherein an included angle between the inclined surface of the light guide bar and the inner wall of the ring or polygon of the housing is between 1 degree and 20 degrees.         The laser device according to item 12 of the scope of patent application, wherein the angles of the V-shaped grooves of the light guide bar are between 5 degrees and 85 degrees.         The laser device according to item 12 of the scope of the patent application, wherein the V-shaped grooves of the light guide bar have the same size or are arranged from sparse to dense.         The laser device according to item 11 of the scope of patent application, further comprising a mercury pump light source and a multi-core optical fiber, the multi-core fiber is connected to the mercury pump light source and the light guide strips respectively, and the mercury pump light source generates the light The light is transmitted to the light guide bars through the multi-core optical fiber, and the light sequentially shines through the inclined surface of the light guide bar and the V-shaped grooves to the laser crystal.         The laser device according to item 16 of the patent application scope, wherein the mercury pump light source is a laser diode, and the wavelength of the laser diode is between 965 and 980 nm.