CN217034958U - Laser pen with continuously adjustable brightness and light spot size - Google Patents
Laser pen with continuously adjustable brightness and light spot size Download PDFInfo
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- CN217034958U CN217034958U CN202220145721.1U CN202220145721U CN217034958U CN 217034958 U CN217034958 U CN 217034958U CN 202220145721 U CN202220145721 U CN 202220145721U CN 217034958 U CN217034958 U CN 217034958U
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Abstract
The utility model discloses a laser pen with continuously adjustable brightness and light spot size, which comprises a first shell, a second shell, a third shell and a fourth shell which are sequentially connected, wherein a pen point is arranged at the tail end of the fourth shell, the first shell is connected with the second shell through a pressing ring, and the second shell and the fourth shell are respectively connected with a third shell through threads; a battery, a circuit board and a laser emitting head are arranged in the first shell, and a switch button connected with the circuit board is arranged outside the first shell; set up polarization beam splitter prism and convex lens one in the shell two, polarization beam splitter prism is located between laser emission head and the convex lens one, set up concave lens in the shell three, set up convex lens two in the shell four, the focus of convex lens two is greater than the focus of convex lens one. The laser pen disclosed by the utility model can realize continuous adjustment of brightness and light spot size, and has the outstanding advantages of capability of meeting individual requirements, quick response, convenience in operation, simple structure, low cost and the like.
Description
Technical Field
The utility model relates to a laser pen, in particular to a laser pen with continuously adjustable brightness and light spot size.
Background
Owing to the characteristics of good collimation, high brightness and the like of laser, the laser pen is widely applied to classroom teaching and various lecture activities in cooperation with multimedia equipment at present.
The traditional laser pen is constant in brightness and light spot size, which is inconvenient in certain specific use conditions, for example, in rainy days or other places with darker environments, if the light intensity of the laser pen is too strong, reflected light is very strong, visual fatigue of human eyes is easily caused, and in addition, the laser pen has certain damage to human bodies; on the other hand, in a well-lighted environment, a brighter laser spot is required to be easily distinguished by the viewer because the scattering effect of the background light is too strong. In addition to the light environment, for a specific audience, such as the elderly and people with defective vision (myopia, amblyopia, etc.), a larger laser spot is often needed to avoid affecting the viewing effect. Therefore, the continuous adjustment of the brightness and the light spot size of the laser pen can meet the individual selection of a specific user, and has urgent practical significance and wide application prospect.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides the laser pen with continuously adjustable brightness and light spot size so as to achieve the purpose of continuously adjusting the brightness and the light spot size.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a laser pen with continuously adjustable brightness and light spot size comprises a first shell, a second shell, a third shell and a fourth shell which are sequentially connected, wherein pen points are arranged at the tail ends of the first shell, the first shell is connected with the second shell through a pressing ring, and the second shell and the fourth shell are respectively connected with the third shell through threads; a battery, a circuit board and a laser emitting head are arranged in the first shell, and a switch button connected with the circuit board is arranged outside the first shell; set up polarization beam splitter prism and convex lens one in the shell two, polarization beam splitter prism is located between laser emission head and the convex lens one, set up concave lens in the shell three, set up convex lens two in the shell four, the focus of convex lens two is greater than the focus of convex lens one.
In the above scheme, the pen point is a light-transmitting glass sheet.
In the scheme, the laser wavelength output by the laser emitting head is 480-630 nm.
In the scheme, the focal length range of the first convex lens is 2.1-5.5 cm.
In the scheme, the focal length range of the second convex lens is 6.3-7.3 cm.
In the above scheme, the focal length range of the concave lens is-2 to-10 cm.
In the above scheme, the first convex lens is mounted inside the second shell through the first fixing ring.
In the above scheme, the concave lens is mounted inside the third shell through the second fixing ring.
In the above scheme, the convex lens two-way is installed inside the shell four-way through the fixing ring three.
Through the technical scheme, the laser pen with continuously adjustable brightness and light spot size has the following beneficial effects:
1. the utility model utilizes the polarization beam splitter prism to only selectively transmit the laser of the polarization component parallel to the horizontal axis, can realize the continuous adjustment of the laser brightness by rotating the shell, and the laser intensity can be continuously changed between the maximum value and the minimum value.
2. A Galileo type combined telescope structure based on a convex lens I, a concave lens and a convex lens II achieves variable-multiple beam expanding and beam shrinking functions of laser, primary expansion and reduction operations can be conducted on the size of a light spot by rotating a shell III, and collimated laser output with small divergence can be achieved by rotating a shell IV in a matched mode.
In conclusion, the design can realize continuous adjustment of the brightness and the light spot size of the laser pen, and has the outstanding advantages of meeting individual requirements, being quick in response, convenient to operate, simple in structure, low in cost and the like, so that various application requirements can be met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic structural diagram of a laser pointer with continuously adjustable brightness and light spot size according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of adjusting laser brightness based on a polarization splitting prism;
FIG. 3 is a schematic diagram of adjusting the laser spot size based on a Galileo telescope structure composed of a first convex lens, a second concave lens and a second convex lens.
In the figure, 1, a first shell; 2. a second shell; 3. a third shell; 4. a shell IV; 5. a pen point; 6. a battery; 7. a circuit board; 8. a switch button; 9. a laser emitting head; 10. pressing a ring; 11. a polarization splitting prism; 12. a first fixing ring; 13. a second fixing ring; 14. a third fixing ring; 15. a first convex lens; 16. a concave lens; 17. and a second convex lens.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
The utility model provides a laser pen with continuously adjustable brightness and light spot size, which comprises a first shell 1, a second shell 2, a third shell 3 and a fourth shell 4 which are sequentially connected as shown in figure 1, wherein a pen point 5 is arranged at the tail end of the fourth shell 4, and the pen point 5 is a light-transmitting glass sheet.
The first shell 1 and the second shell 2 are mutually independent parts and are connected and fixed together through a pressing ring 10. The method comprises the following specific steps: the left side of the second shell 2 is provided with an extended external thread hollow cylindrical structure which can just penetrate through the hollow cylindrical structure on the right side of the first shell 1. The pressing ring 10 is an internal thread metal ring, and the inner diameter of the pressing ring is matched with the external thread hollow cylinder structure on the left side of the second shell 2. After the hollow cylinder structure on the right side of the first shell 1 is connected with the hollow cylinder structure on the left side of the second shell 2, the hollow cylinder structure is fixed by screwing the pressing ring 10. Through the connection mode, when the first shell 1 is rotated, only the first shell 1 and the internal components thereof can rotate along the central axis of the laser pen, and the second shell 2, the third shell 3, the fourth shell 4 and the internal components thereof are not moved.
The second shell 2 and the fourth shell 4 are respectively in threaded connection with the third shell 3, and specifically are as follows: two sides of the third shell 3 are hollow internal thread cylindrical structures and are respectively connected with the external thread cylindrical structures on the right side of the second shell 2 and the left side of the fourth shell 4. Due to the threaded connection structure, the shell III 3 and the shell IV 4 can be moved back and forth simultaneously by rotating the shell III 3, but the shell I1 and the shell II 2 are not moved in the process; the shell four 4 can be rotated to realize the forward and backward movement of the shell four 4 and the internal parts thereof, but the shell I1, the shell II 2 and the shell III 3 are not moved in the process.
A battery 6, a circuit board 7 and a laser emitting head 9 are arranged in the first shell 1, and the laser wavelength output by the laser emitting head 9 is 480-630 nm. The switch button 8 connected with the circuit board 7 is arranged outside the first shell 1, the battery 6 acts on the laser emitting head 9 through the circuit board 7, and the switch button 8 controls whether the circuit board 7 works or not, so that the on-off operation of the laser pen can be controlled.
Set up polarization beam splitter prism 11 and convex lens 15 in the shell two 2, polarization beam splitter prism 11 is located between laser emission head 9 and convex lens 15, and convex lens 15's focal length scope is 2.1 ~ 5.5 cm.
Fig. 2 is a schematic diagram of adjusting the brightness of the laser light based on the polarization splitting prism 11. A beam of laser light field
Light that can be considered as a horizontally polarized component
And light of a vertically polarized component
And (4) superposing. When the first shell 1 is rotated, the main polarization direction of the laser emitted from the laser emitting head 9 rotates along with the first shell, the size of an included angle between the main polarization direction and the parallel axis of the polarization beam splitter prism 11 is changed, and the projection component of the incident laser in the horizontal axis direction of the polarization beam splitter prism 11 is changed along with the change. Because the polarization beam splitter prism 11 can only selectively transmit the polarization beam parallel to the horizontal axisThe vibration component of the laser light, so that the intensity of the transmitted light can be adjusted.
The convex lens I15 is arranged inside the shell II 2 through the first fixing ring 12, and specifically comprises the following components: the first fixing ring 12 can be fixed on the inner wall of the second housing 2 by gluing or other methods. The convex lens one 15 can be embedded into the inner ring of the fixed ring one 12.
The third shell 3 is internally provided with a concave lens 16, and the focal length range of the concave lens 16 is-2 to-10 cm. The concave lens 16 is mounted inside the housing three 3 by a fixing ring two 13 in the same manner as the fixing of the convex lens one 15. The concave lens 16 can be driven to move back and forth by rotating the third shell 3, so that the combined focal length of the first convex lens 15 and the concave lens 16 is changed.
And a second convex lens 17 is arranged in the fourth shell 4, and the focal length range of the second convex lens 17 is 6.3-7.3 cm. The second convex lens 17 is mounted inside the fourth housing 4 through the third fixing ring 14 in the same manner as the first convex lens 15. The rotating shell four 4 can drive the convex lens two 17 to move back and forth, thereby realizing the function of adjusting the size of the emergent laser facula.
The brightness adjustment of the laser pen comprises the following steps:
1) the laser light emitted by the laser emitting head 9 is partially polarized light, that is, the polarization distribution of the laser light in a certain direction (main polarization direction) is the maximum;
2) the polarization splitting prism 11 has a selective transmission function of allowing only polarized light components parallel to its horizontal axis to pass therethrough, i.e., a selective transmission function for an incident light beam;
3) when the first housing 1 is rotated, the main polarization direction of the laser rotates, the included angle between the main polarization direction of the laser and the horizontal axis of the polarization splitting prism 11 changes, and the polarized light intensity distribution projected in the horizontal axis direction of the polarization splitting prism 11 also changes.
4) With the rotation of the first housing 1, the intensity of the laser beam finally transmitted through the polarization beam splitter prism 11 can be continuously adjusted.
The light spot size adjustment of the laser pen comprises the following two steps:
1) the third housing 3 is rotated, and the concave lens 16 in the third housing moves back and forth within a certain range relative to the position of the first convex lens 15. The focal length of the combined lens formed by the convex lens I15 and the concave lens 16 is changed, and the laser spot is adjusted to a satisfactory size preliminarily. In the process, the first shell 1 and the second shell 2 do not move along with the first shell and the second shell.
2) The shell IV 4 is rotated, the shell I1, the shell II 2 and the shell III 3 are not moved, the convex lens II 17 can move in the front-back direction relative to the convex lens I15 and the concave lens 16, the convex lens I15, the concave lens 16 and the convex lens II 17 form a variable-focus laser beam zooming system, the scattering angle of laser is greatly reduced in the process, and the emergent laser is approximately collimated laser with the size of a light spot and is zoomed.
Fig. 3 is a schematic diagram of adjusting the laser spot size based on a galilean type combined telescope structure composed of a first convex lens 15, a second concave lens 16 and a second convex lens 17. H is the initial spot radius, and H is the spot radius after passing through the Galileo type combined telescope structure.
Example 1
Table 1 shows a specific design value of the laser pointer with continuously adjustable brightness and light spot size, and the specific value can be optimized and adjusted according to the product requirements and applications, and is not meant to limit the embodiment of the present invention. The column "reference number" in the table is numbered according to the size pitch of each component.
A. B, C, D are the lengths of the first casing 1, the second casing 2, the third casing 3 and the fourth casing 4, respectively, E is the diameter of the pen tip 5, and f1, f2 and f3 are the focal lengths of the first convex lens 15, the second concave lens 16 and the second convex lens 17, respectively. Under the numerical conditions, the diameter of the laser spot can be enlarged by 10 times at most.
TABLE 1 laser pen specific parameters
| A | B | C | D | E | f1 | f2 | f3 | |
| Length (centimeter) | 2 | 3 | 3 | 2 | 2 | 2.1 | -2 | 6.3 |
By the specific embodiment, the laser pen with continuously adjustable brightness and light spot size can be obtained. In the laser opening state, continuous adjustment of the laser brightness can be achieved by rotating the first shell 1. The third shell 3 can be rotated to perform preliminary expansion and reduction operations on the size of the light spot, and the fourth shell 4 is rotated in a matching manner, so that the collimated laser output with small divergence can be realized.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A laser pen with continuously adjustable brightness and light spot size is characterized by comprising a first shell, a second shell, a third shell and a fourth shell which are sequentially connected, wherein a pen point is arranged at the tail end of the fourth shell, the first shell is connected with the second shell through a pressing ring, and the second shell is connected with the fourth shell through threads; a battery, a circuit board and a laser emitting head are arranged in the first shell, and a switch button connected with the circuit board is arranged outside the first shell; set up polarization beam splitter prism and convex lens one in the shell two, polarization beam splitter prism is located between laser emission head and the convex lens one, set up concave lens in the shell three, set up convex lens two in the shell four, the focus of convex lens two is greater than the focus of convex lens one.
2. The laser pen with the continuously adjustable brightness and the continuously adjustable light spot size as claimed in claim 1, wherein the pen point is a transparent glass sheet.
3. The laser pen with continuously adjustable brightness and light spot size as claimed in claim 1, wherein the laser output from the laser emitting head has a wavelength of 480-630 nm.
4. The laser pen with the continuously adjustable brightness and the continuously adjustable light spot size as claimed in claim 1, wherein the first convex lens has a focal length ranging from 2.1 cm to 5.5 cm.
5. The laser pen with continuously adjustable brightness and light spot size as claimed in claim 1, wherein the focal length of the second convex lens is 6.3-7.3 cm.
6. The laser pen with continuously adjustable brightness and light spot size as claimed in claim 1, wherein the focal length of the concave lens is in the range of-2 to-10 cm.
7. The laser pen as claimed in claim 1, wherein the first convex lens is mounted inside the second housing through a first fixing ring.
8. The laser pen as claimed in claim 1, wherein the concave lens is mounted inside the housing III through a second fixing ring.
9. The laser pen as claimed in claim 1, wherein the convex lens is mounted inside the housing through a third fixing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220145721.1U CN217034958U (en) | 2022-01-19 | 2022-01-19 | Laser pen with continuously adjustable brightness and light spot size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220145721.1U CN217034958U (en) | 2022-01-19 | 2022-01-19 | Laser pen with continuously adjustable brightness and light spot size |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217034958U true CN217034958U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220145721.1U Active CN217034958U (en) | 2022-01-19 | 2022-01-19 | Laser pen with continuously adjustable brightness and light spot size |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217034958U (en) |
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2022
- 2022-01-19 CN CN202220145721.1U patent/CN217034958U/en active Active
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