CN110426810B - Focusing mechanism and optical system of laser device - Google Patents
Focusing mechanism and optical system of laser device Download PDFInfo
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- CN110426810B CN110426810B CN201910698751.8A CN201910698751A CN110426810B CN 110426810 B CN110426810 B CN 110426810B CN 201910698751 A CN201910698751 A CN 201910698751A CN 110426810 B CN110426810 B CN 110426810B
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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Abstract
The invention provides a focusing mechanism and an optical system of a portable laser weapon, wherein the focusing mechanism comprises a body and a focusing objective lens, a focusing cam and an adjusting groove are arranged in the body, the focusing cam is connected with a focusing thumb wheel, and an arc-shaped groove is arranged at the bottom of the focusing cam; the focusing objective is positioned at one side of the adjusting groove, an adjusting slide bar is arranged in the adjusting groove, the focusing objective is connected with the adjusting slide bar, and the adjusting slide bar is movably connected with the arc-shaped groove of the focusing cam through an adjusting guide pin; the focusing cam is rotated through the focusing thumb wheel, so that the adjusting guide pin is driven to move left and right along the track of the arc-shaped groove, and the focusing objective lens is driven to move through the adjusting slide rod. By adopting the technical scheme of the invention, the focusing mechanism enables the position of the focusing objective lens in the optical component to be adjustable, thereby achieving the effects of adjusting the divergence angle and the adjustment distance and having good compatibility to laser beams; the laser beam converted by the device has long eroding action distance, small volume and light weight, and is suitable for hand-held operation.
Description
Technical Field
The invention relates to the technical field of laser application, in particular to a focusing mechanism and an optical system of a laser device.
Background
Laser is a great invention for human beings after nuclear energy, computers and semiconductors in the 20 th century, and is called as a fastest knife, a most accurate ruler and a brightest light, and light emitted by atoms is excited, so the name of laser is that in order to meet technical and tactical index requirements of a certain individual laser weapon, an optical device capable of focusing a laser beam with average power of hundreds of watts into the range of hundreds of meters is needed, and the optical device is small in structure, light in weight, suitable for individual handheld operation and high in shooting precision.
The existing laser glare gun has low laser power and small action distance, can only be used for warning, has high laser power, but has huge volume, and cannot be equipped with individual soldiers, so that an optical device capable of long-distance transmission and small in volume is required to be designed to realize the individual soldier application of the laser weapon.
In addition, the beam of the laser output by the existing fiber laser after being shaped by the damaged optical component is in a divergent state, the size of a damaged light spot is difficult to meet the requirement in a long distance due to Gaussian distribution of laser energy, the laser parameter of the fiber laser is difficult to improve, and the divergence angle of the output laser cannot be reduced in a short time.
Disclosure of Invention
Aiming at the technical problems, the invention discloses an optical system of a focusing mechanism and a laser device, which has the advantages of small structure, light weight, precise control, good artificial efficiency and the like, and solves the problems that the existing laser glare gun has low laser power and small acting distance, can only be used for warning, and the existing laser gun has high laser power but huge volume and cannot be provided with portability.
In this regard, the invention adopts the following technical scheme:
The focusing mechanism comprises a body and a focusing objective lens, wherein a focusing cam and an adjusting groove are arranged in the body, the focusing cam is connected with a focusing thumb wheel, and an arc groove is formed in the bottom of the focusing cam; the focusing objective is positioned at one side of the adjusting groove, an adjusting slide bar is arranged in the adjusting groove, the focusing objective is connected with the adjusting slide bar, and the adjusting slide bar is movably connected with the arc-shaped groove of the focusing cam through an adjusting guide pin; the focusing cam is rotated through the focusing thumb wheel, so that the adjusting guide pin is driven to move left and right along the track of the arc-shaped groove, and the focusing objective lens is driven to move through the adjusting slide rod, so that the effect of adjusting the divergence angle is achieved.
Further, one end of the adjusting guide pin extends into the arc-shaped groove.
Further, the focusing cam is located at one side of the adjusting groove.
As a further improvement of the invention, the arc-shaped groove is a spiral speed change curve groove.
As a further improvement of the invention, the curve of the arc-shaped groove comprises four sections of motion curves in time intervals which are mutually connected, wherein the first three sections are curves with curvature changing gradually or progressively, and the adjacent motion curves are smoothly transited through the arc line.
Further, the motion curves of the four time intervals are four quadrants of a plane rectangular coordinate system.
Further, the motion curves of the four time intervals are monotonically increasing curves or monotonically decreasing curves.
As a further improvement of the invention, each motion curve is a matched shape function curve synthesized by at least two single-increase shape functions, the shape function curve is formed by matching G1 (x) and G2 (x), the G1 (x) is expressed by adopting a F1 (u) function, and the G2 (x) is expressed by adopting a F2 (u) function as follows:
Wherein F1 (x/a), F2 ((x-a)/(b-a)) are continuous functions and each satisfy F (0) =0 and F (1) =1; a. b, c and d are constants;
g1 The coefficient of fit λ for (x) and G2 (x) is: λ=m2/[ (b-a) m1+m2 ], where m1 is the derivative value of the end of the shape function F1 (u), and m2 is the derivative value of the head end of the shape function F2 (u).
The reasoning of the above-mentioned matching coefficients is as follows:
Deriving the functions G1 (x) and G2 (x), to obtain:
If two curves are made into a continuous and smooth curve, there are:
G'1(a)＝ G'2(a) (3)
substituting the formula (3) into the formula (2), and finishing to obtain:
c/d＝aF'2(0)/[(b-a)F1(1)+aF'2(0)] (4)
The cam mechanism follower jump curves are continuous, and the boundary conditions satisfied by the first derivatives of the shape functions F1 (u) and F2 (u) are generally:
Wherein m 1-the derivative value of the end of the shape function F1 (u);
m 2-derivative value of the head end of the shape function F2 (u).
Substituting the formula (5) into the formula (4), and finishing to obtain:
λ＝c/d＝am2/[(b-a)m1+am2] (6)
wherein lambda is the matching coefficient of the shape function.
For two monotonically increasing shape functions, as long as equation (5) is satisfied, the two shape functions may form a pair of cooperating shape functions, which facilitates the synthesis of the motion profile.
As a further improvement of the invention, the focusing deflector wheel is connected with a cam shaft of a focusing cam, and a sealing cover is arranged at a crack formed between the body and the cam shaft.
As a further improvement of the invention, a rotary shaft sleeve is arranged at a crack formed by the focusing cam and the sealing cover; the cam shaft extends out of the main body and is connected with the sealing cover through the rotary shaft sleeve.
As a further improvement of the invention, the bottom of the focusing cam is provided with an adjusting hole corresponding to the adjusting guide pin, and the top of the adjusting guide pin is provided with a limiting rod corresponding to the adjusting hole.
As a further improvement of the invention, a slide rail seat is arranged in the adjusting groove and is connected with the adjusting slide rod through a slide rod shaft sleeve; limiting and adjusting holes corresponding to the adjusting slide bars are formed in the slide bar shaft sleeves.
Further, the sliding rod shaft sleeve is fixed in the main body.
As a further improvement of the invention, the bottom of the focusing objective lens is fixedly connected with a slide rail seat, the bottom of the slide rail seat is movably connected with an adjusting slide rod, the bottom of the focusing objective lens is provided with a fixed screw nail, the bottom of the fixed screw nail is fixedly connected with an adjusting shifting block, and the effect of adjusting the distance is realized by adjusting the shifting block.
Further, the rotary shaft sleeve is sleeved with the cam shaft.
Further, the focusing thumb wheel is sleeved with the cam shaft.
Further, anti-skid patterns are arranged on the surface of the focusing thumb wheel.
Further, the main body at the outer side of the focusing cam is provided with a corresponding arc-shaped shell.
The invention also discloses an optical system of the laser device, which comprises a laser emitter, a laser isolator, a power module and an optical component, wherein the power module is connected with the laser emitter, the laser emitter is connected with the laser isolator, and the laser isolator is positioned at one side of the optical component; the optical assembly comprises a main body, a focusing mechanism and a lens group are arranged in the casing, the lens group comprises a first negative lens, a second negative lens, a first positive lens and a second positive lens which are sequentially arranged, the first negative lens and the second negative lens are connected to form a focusing objective lens, and laser emitted by the laser emitter is emitted from the first negative lens after being processed by the laser isolator; the focusing mechanism adopts the focusing mechanism as described in any one of the above. Wherein the central axes of the first negative lens, the second negative lens, the first positive lens and the second positive lens are on the same straight line. The number of the lens groups is reduced, so that the long-distance convergence is met, and the imaging quality is also considered.
Further, the diameter of the first negative lens is smaller than the diameter of the second negative lens. The diameters of the first positive lens and the second positive lens are larger than the diameter of the second negative lens. The curvature of the first positive lens is greater than that of the second positive lens.
As a further improvement of the invention, the focusing objective lens comprises a focusing bracket, the first negative lens and the second negative lens are fixed on two sides of the focusing bracket, and the focusing bracket is connected with the adjusting slide bar; the first positive lens and the second positive lens are fixed in the shell; and the first positive lens and the second positive lens are attached.
Compared with the prior art, the invention has the beneficial effects that:
firstly, by adopting the technical scheme of the invention, laser emitted by the laser isolator is subjected to four refraction transformations in the body, the laser beam is changed into a laser beam which has small dispersion angle and large beam waist radius and is suitable for long-distance convergence, the position of the focusing mechanism in the optical component body is adjustable, and the compatibility of the laser beam is good; the laser beam converted by the device has the advantages of long eroding action distance, small volume and light weight, is suitable for handheld operation, and has positive pushing action on the research and development of the combat laser weapon.
Secondly, by adopting the technical scheme of the invention, the laser weapon damage and interference function integration and miniaturization are realized through the lens group and the gear shifting mechanism, namely the focusing mechanism; the laser beam waist radius is increased through the first negative lens and the second negative lens, the distortion of the off-axis beam is reduced, the dispersion angle of the laser beam is compressed through the first positive lens and the second positive lens, and the distortion of the off-axis beam is reduced; the lens group forms a set of Galilean laser beam expansion structure type laser emission objective lens, the amplification factor of the laser emission objective lens can be calculated according to related parameters such as the wavelength of laser, the dispersion angle of the laser, the beam waist of the laser, the maximum attack distance, the diameter of a laser spot and the like, and parameters of the first negative lens, the second negative lens, the first positive lens and the second positive lens are calculated by utilizing ZEMAX optical software, so that the use of a user is facilitated.
Thirdly, by adopting the technical scheme of the invention, the focusing cam is arranged, the focusing objective lens is uniformly arranged at the bottom of the focusing cam, the effect of adjusting the divergence angle by adjusting the focusing thumb wheel to drive the focusing objective lens is achieved, and the effect of adjusting the distance is achieved by arranging the adjusting thumb block; by arranging the sealing cover, the effect of avoiding the interference of the internal elements is achieved; the anti-skid patterns are formed on the outer surface of the focusing thumb wheel, so that the effect of convenient adjustment is achieved.
Drawings
Fig. 1 is a schematic view of a focusing mechanism according to the present invention.
Fig. 2 is another schematic structure of a focusing mechanism of the present invention.
Fig. 3 is a structural elevation view of a focusing mechanism of the present invention.
Fig. 4 is a bottom view of a focus mechanism according to the present invention.
Fig. 5 is a graph showing the composition of the shape function curves of the arc grooves of the focusing cam of the present invention.
Fig. 6 is a schematic structural diagram of an optical system of a laser device according to the present invention.
Fig. 7 is a schematic diagram of a proprietary optical path of an optical system of a laser device according to the present invention.
The reference numerals include: the device comprises a 1-body, a 2-focusing cam, a 3-adjusting groove, a 4-focusing thumb wheel, a 5-arc groove, a 6-focusing objective lens, a 7-adjusting slide bar, an 8-adjusting guide pin, a 9-cam shaft, a 10-sealing cover, a 11-rotating shaft sleeve, a 12-adjusting hole, a 14-slide rail seat, a 15-slide bar shaft sleeve, a 16-limiting adjusting hole, a 17-fixed screw nail, a 18-adjusting shifting block and a 19-focusing driving plate;
21-laser transmitter, 22-laser isolator, 23-power module, 24-optical component, 25-first negative lens, 26-second negative lens, 27-first positive lens, 28-second positive lens, 29-focusing mechanism.
Detailed Description
Preferred embodiments of the present invention are described in further detail below.
Example 1
The focusing mechanism comprises a body 1 and a focusing objective lens 6, wherein a focusing cam 2 and an adjusting groove 3 are arranged in the body 1, the focusing cam 2 is connected with a focusing thumb wheel 4, and an arc groove 5 is arranged at the bottom of the focusing cam 2; the focusing objective 6 is positioned at one side of the adjusting groove 3, an adjusting slide bar 7 is arranged in the adjusting groove 3, the focusing objective 6 is connected with the adjusting slide bar 7, and the adjusting slide bar 7 is connected with the arc-shaped groove 5 of the focusing cam 2 through an adjusting guide pin 8; the focusing cam 2 is rotated through the focusing thumb wheel 4, so that the adjusting guide pin 8 is driven to move left and right along the track of the arc-shaped groove 5, and the focusing objective lens 6 is driven to move through the adjusting slide rod 7, so that the divergence angle adjusting effect is achieved. One end of the adjusting guide pin 8 extends into the arc-shaped groove 5. The focusing cam 2 is positioned at one side of the adjusting groove 3. The arc-shaped groove 5 is a spiral speed change curve groove.
The focusing thumb wheel 4 is connected with a cam shaft 9 of the focusing cam 2, and a sealing cover 10 is arranged at a crack formed by the body 1 and the cam shaft 9. The sealing cover 10 is arranged, so that the effect of avoiding the interference of the internal elements is achieved. A rotary shaft sleeve 11 is arranged at a crack formed between the focusing cam 2 and the sealing cover 10; the camshaft 9 protrudes out of the body and is connected to a sealing cover 10 by means of a swivel sleeve 11. Further, the rotary shaft sleeve 11 is sleeved with the cam shaft 9, and the focusing thumb wheel 4 is sleeved with the cam shaft 9.
The bottom of the focusing cam 2 is provided with an adjusting hole 12 corresponding to the adjusting guide pin 8, and the top of the adjusting guide pin 8 is provided with a limiting rod corresponding to the adjusting hole 12. The bottom of the focusing objective lens 6 is fixedly connected with a slide rail seat 14, and the slide rail seat 14 is connected with the adjusting slide rod 7 through a slide rod shaft sleeve 15; limiting and adjusting holes 16 corresponding to the adjusting slide bars 7 are formed in the slide bar shaft sleeves 15. The cooperation of the limit rod and the limit adjusting hole 1612 can enable the adjusting guide pin 8 to correspond to the focusing objective lens 6, so that the device is more precise. Further, the slide bar shaft sleeve 15 is fixed in the main body,
The bottom of the slide rail seat 14 is movably connected with the adjusting slide bar 7, a fixed screw nail 17 is arranged at the bottom of the focusing objective lens 6, and an adjusting shifting block 18 is fixedly connected with the bottom of the fixed screw nail 17. By adjusting the dial 18, an adjustable distance effect is achieved.
And the bottom of the focusing cam 2 is uniformly provided with the focusing objective lens 6, so that the focusing objective lens 6 can be driven by adjusting the focusing thumb wheel 4
In the embodiment, the focusing thumb wheel 4, the focusing cam 2, the adjusting slide rod 7 and the adjusting guide pin 8 form a set of shifting mechanism, and the shifting mechanism controls the focusing objective lens 6 to realize variable-speed focusing, so that the structure is compact.
Further, anti-skid patterns are arranged on the surface of the focusing thumb wheel 4. The anti-skid patterns are arranged on the surface of the focusing thumb wheel 4, so that the effect of convenient adjustment is achieved.
In this embodiment, the adjusting guide pin 8 plays a role in connecting the focusing cam 2 and the focusing objective lens 6, and by adjusting the focusing thumb wheel 4, the adjusting guide pin 8 is driven to adjust the position of the focusing objective lens 6 along the movement track designed by the focusing cam 2 as shown in fig. 2, so as to achieve the effect of adjusting the divergence angle, and make the device more precise.
Further, the curve of the arc-shaped groove 5 is formed by connecting motion curves of four time intervals, wherein the first three sections are curves with curvature changing gradually or progressively, and the adjacent motion curves are in smooth transition through the arc line. The motion curves of the four time intervals are four quadrants of a plane rectangular coordinate system. The motion curves of the four time intervals are monotonically increasing curves.
The motion track of the cam takes a dimensionless acceleration curve of a follower adjusting guide pin 8 of the focusing cam 2 as a base curve, and divides a general motion curve of four time intervals, wherein three time intervals are time intervals of acceleration change, and the time intervals are represented by a monotonic shape function. And on the basis of shape function curve synthesis research, a matched shape function is provided, synthesis between motion curves of each interval is analyzed, a continuous and smooth acceleration synthesis curve is obtained, and a general motion curve equation of each interval is solved, so that the motion rule design of the adjusting guide pin 8 of the follower of the focusing cam 2 is satisfied. The whole shape of the curve can be controlled by adjusting the interval time interval through the curve, and the local shape of the curve can be changed by selecting the function type of the interval, so that the curve is suitable for small installation space and the precision control is realized.
Matching shape functions:
The function F (u) is a continuous function defined in the interval [0,1], and is a shape function if it is not limited to a continuous function having a1 st order or more and satisfies two conditions of F (0) =0 and F (1) =1. If F' (u) is equal to or greater than 0, the shape function has monotonically increasing properties. As shown in fig. 4, functions G1 (x) and G2 (x) for setting two sections are represented by single increasing shape functions F1 (u) and F2 (u), respectively:
deriving the functions G1 (x) and G2 (x), to obtain:
If two curves are made into a continuous and smooth curve, there are:
G'1(a)＝ G'2(a) (3)
substituting the formula (3) into the formula (2), and finishing to obtain:
c/d＝aF'2(0)/[(b-a)F1(1)+aF'2(0)] (4)
The cam mechanism follower jump curves are continuous, and the boundary conditions satisfied by the first derivatives of the shape functions F1 (u) and F2 (u) are generally:
wherein m1 is the derivative value of the end of the shape function F1 (u);
m 2-derivative value of the head end of the shape function F2 (u).
Substituting the formula (5) into the formula (4), and finishing to obtain:
λ ＝c/d＝am2/[(b-a)m1+am2] (6)
in the formula, lambda is the matching coefficient of the shape function.
For two monotonically increasing shape functions, as long as equation (5) is satisfied, the two shape functions may form a pair of cooperating shape functions, which facilitates the synthesis of the motion profile. Table 1 shows a list of matching shape functions that may be employed in embodiments of the present invention, where the shape functions F1 (u) and F2 (u) may be paired in any combination, so as to improve the diversity of curve synthesis and enable adjustment of local shapes of curves.
TABLE 1 shape function of fit
And solving general jump, acceleration, speed and displacement motion equations of each section according to the relation between each section curve in the general motion curve model and the result derived from the motion curve characteristic values by utilizing the coordination relation of the shape function, as shown in table 2.
Table 2 general equation of motion curve for cam
Example 2
As shown in fig. 5, an optical system of a portable laser weapon includes a laser transmitter 21, a laser isolator 22, a power module 23, and an optical component 24, wherein the power module 23 is connected to the laser transmitter 21, the laser transmitter 21 is connected to the laser isolator 22, and the laser isolator 22 is located on one side of the optical component 24. The optical assembly 24 includes a main body, in which a focusing mechanism 29 and a lens group are disposed, as shown in fig. 6, the lens group includes a first negative lens 25, a second negative lens 26, a first positive lens 27 and a second positive lens 28 that are sequentially arranged, the first negative lens 25 and the second negative lens 26 are connected to form a focusing objective lens 6, and laser emitted from the laser emitter 21 is processed by a laser isolator 22, and then is incident from the first negative lens 25 and is emitted from the second positive lens 28; the focusing mechanism 29 adopts the focusing mechanism of embodiment 1. Wherein the central axes of the first negative lens 25, the second negative lens 26, the first positive lens 27 and the second positive lens 28 are on the same straight line.
The focusing objective lens 6 comprises a focusing bracket, the first negative lens 25 and the second negative lens 26 are fixed on two sides of the focusing bracket, and the focusing bracket is connected with the adjusting slide rod 7; the first positive lens 27 and the second positive lens 28 are fixed in the housing; the first positive lens 27 and the second positive lens 28 are bonded. Further, the diameter of the first negative lens 25 is smaller than the diameter of the second negative lens 26. The diameters of the first positive lens 27 and the second positive lens 28 are larger than the diameter of the second negative lens 26. The curvature of the first positive lens 27 is larger than that of the second positive lens 28.
The body 1 in embodiment 1 is actually connected to, or part of, a main body. The inside left side fixedly connected with first positive lens 27 and second positive lens 28 of main part, the main part is at the inside second negative lens 26 of fixedly connected with in the left side of focusing mechanism, the inside first negative lens 25 of fixedly connected with in the right side of focusing mechanism to constitute the lens group. The inside of main part is hollow chamber, focusing mechanism is located hollow intracavity. The focusing dial wheel 4 is connected with a focusing dial 19, the focusing dial 19 is positioned at the top of the main body,
The focusing cam 2 can rotate on the cam shaft 9, and the position of the focusing objective lens 6 is adjusted, so that the problems that the laser parameters of the fiber laser are difficult to improve and the divergence angle of output laser cannot be reduced in a short time are effectively solved.
In the optical system of the portable laser weapon of this embodiment, laser emitted by the laser isolator 22 is subjected to four refraction transformations in the body 1, the laser beam becomes a laser beam which is small in dispersion angle and large in beam waist radius and suitable for long-distance convergence, and is emitted from the front of the body 1, the position of the focusing mechanism in the body is adjustable, the focusing driving wheel 4 is adjusted to drive the focusing objective lens 6, namely, the positions of the first negative lens 25 and the second negative lens 26 are adjusted, the position adjustment movement achieves the effect of adjusting the divergence angle, and the adjusting block 18 is arranged to achieve the effect of adjusting the distance.
The laser beam laser device has good compatibility to laser beams, the optical system is a core component for realizing long-distance ablation effect of an individual laser weapon, the laser beam transformed by the device has long ablation effect distance, small volume and light weight, is suitable for handheld operation, and has positive pushing effect on research and development of the combat laser weapon.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (5)
1. A focusing mechanism, characterized in that: the focusing device comprises a body and a focusing objective lens, wherein a focusing cam and an adjusting groove are arranged in the body, the focusing cam is connected with a focusing thumb wheel, and an arc groove is formed in the bottom of the focusing cam; the focusing objective is positioned at one side of the adjusting groove, an adjusting slide bar is arranged in the adjusting groove, the focusing objective is connected with the adjusting slide bar, and the adjusting slide bar is movably connected with the arc-shaped groove of the focusing cam through an adjusting guide pin;
the focusing cam is rotated through the focusing thumb wheel, so that the adjusting guide pin is driven to move left and right along the track of the arc-shaped groove, and the focusing objective lens is driven to move through the adjusting slide rod;
The arc-shaped groove is a spiral speed-changing curve groove;
The curve of the arc-shaped groove comprises four sections of motion curves in time intervals which are mutually connected, wherein the first three sections are curves with curvature changing gradually or progressively, and the adjacent motion curves are in smooth transition through the arc line;
Each section of motion curve is a matched shape function curve synthesized by at least two single-increase shape functions, the shape function curve is formed by matching G1 (x) and G2 (x), the G1 (x) is represented by adopting a F1 (u) function, and the G2 (x) is represented by adopting a F2 (u) function as follows:
G1(x)= cF1(x/a) (0≤ x≤ a)，
G2(x)= c+(d-c)F2((x-a)/(b-a)) (a≤ x≤ b)，
Wherein F1 (x/a), F2 ((x-a)/(b-a)) are continuous functions and each satisfy F (0) =0 and F (1) =1; a. b, c and d are constants;
G1 The coefficient of fit λ for (x) and G2 (x) is: λ=m2/[ (b-a) m1+m2 ], where m1 is the derivative value of the end of the shape function F1 (u), and m2 is the derivative value of the head end of the shape function F2 (u); the function F (u) is a continuous function defined in the interval [0,1 ];
The bottom of the focusing objective lens is fixedly connected with a slide rail seat, the bottom of the slide rail seat is movably connected with an adjusting slide rod, the bottom of the focusing objective lens is provided with a fixed screw nail, and the bottom of the fixed screw nail is fixedly connected with an adjusting shifting block;
the sliding rail seat is connected with the adjusting sliding rod through a sliding rod shaft sleeve, and limiting adjusting holes corresponding to the adjusting sliding rod are formed in the sliding rod shaft sleeve; and anti-skid patterns are arranged on the surface of the focusing thumb wheel.
2. The focus adjustment mechanism of claim 1, wherein: the focusing shifting wheel is connected with a cam shaft of the focusing cam, a sealing cover is arranged at a joint formed by the body and the cam shaft, and a rotary shaft sleeve is arranged at the joint formed by the focusing cam and the sealing cover; the cam shaft extends out of the main body and is connected with the sealing cover through the rotary shaft sleeve.
3. The focus adjustment mechanism of claim 2, wherein: the bottom of the focusing cam is provided with an adjusting hole corresponding to the adjusting guide pin, and the top of the adjusting guide pin is provided with a limiting rod corresponding to the adjusting hole.
4. An optical system of a laser device, characterized in that: the device comprises a laser transmitter, a laser isolator, a power module and an optical component, wherein the power module is connected with the laser transmitter, the laser transmitter is connected with the laser isolator, and the laser isolator is positioned on one side of the optical component; the optical assembly comprises a shell, a focusing mechanism and a lens group are arranged in the shell, the lens group comprises a first negative lens, a second negative lens, a first positive lens and a second positive lens which are sequentially arranged, the first negative lens and the second negative lens are connected to form a focusing objective lens, and laser emitted by the laser emitter is processed by a laser isolator and then is emitted from the first negative lens and then is emitted from the second positive lens; the focusing mechanism adopts the focusing mechanism according to any one of claims 1 to 3.
5. The optical system of the laser device according to claim 4, wherein: the focusing objective lens comprises a focusing bracket, the first negative lens and the second negative lens are fixed on two sides of the focusing bracket, and the focusing bracket is connected with the adjusting slide rod; the first positive lens and the second positive lens are fixed in the shell; and the first positive lens and the second positive lens are attached.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910698751.8A CN110426810B (en) | 2019-07-31 | 2019-07-31 | Focusing mechanism and optical system of laser device |
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