CN117504158B - Laser optical system for laser pain relieving instrument - Google Patents
Laser optical system for laser pain relieving instrument Download PDFInfo
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- CN117504158B CN117504158B CN202410020422.9A CN202410020422A CN117504158B CN 117504158 B CN117504158 B CN 117504158B CN 202410020422 A CN202410020422 A CN 202410020422A CN 117504158 B CN117504158 B CN 117504158B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 48
- 230000000202 analgesic effect Effects 0.000 claims abstract description 18
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000002310 reflectometry Methods 0.000 claims description 9
- 238000002834 transmittance Methods 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 abstract description 3
- 239000013307 optical fiber Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000002560 therapeutic procedure Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000004071 biological effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000000554 physical therapy Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000017423 tissue regeneration Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001827 electrotherapy Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002653 magnetic therapy Methods 0.000 description 1
- 231100000957 no side effect Toxicity 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/067—Radiation therapy using light using laser light
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/0626—Monitoring, verifying, controlling systems and methods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/063—Radiation therapy using light comprising light transmitting means, e.g. optical fibres
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/0632—Constructional aspects of the apparatus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/0635—Radiation therapy using light characterised by the body area to be irradiated
- A61N2005/0642—Irradiating part of the body at a certain distance
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/0658—Radiation therapy using light characterised by the wavelength of light used
- A61N2005/0659—Radiation therapy using light characterised by the wavelength of light used infrared
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/0664—Details
- A61N2005/0665—Reflectors
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
The invention discloses a laser optical system for a laser analgesic instrument, belongs to the technical field of medical equipment, and aims to solve the problems that the radiation range and power of laser cannot be accurately controlled and the pain area cannot be accurately positioned and adjusted in the treatment process in the prior art. The invention relates to a laser optical system for a laser analgesic apparatus, which comprises an infrared laser, an indication light source, a transmission beam expanding system, a laser reflection system, a laser beam combining system, an off-axis beam expanding system, a diaphragm and a parameter control system; the infrared laser beam emitted by the infrared laser enters the laser reflection system after being expanded by the transmission beam expanding system, the laser beam reflected by the laser reflection system and the beam emitted by the indication light source enter the off-axis beam expanding system after being combined and coaxially output by the laser beam combining system, and the optical fiber after being expanded by the off-axis beam expanding system is output by the diaphragm; and regulating and controlling the power density of the infrared laser and the power density of the indicating light source through the parameter control system.
Description
Technical Field
The invention belongs to the technical field of medical equipment, and particularly relates to a laser optical system for a laser analgesic instrument.
Background
Pain management has been an important direction in the medical field. Traditional pain treatment methods include medication, physical therapy, etc., however, medication may cause a series of adverse effects, and traditional physical therapy such as electrotherapy, thermal therapy, magnetic therapy, etc. has limitations in terms of therapeutic effect and safety. Therefore, finding new therapeutic methods is a research hotspot in the medical field.
Laser analgesic therapy has been increasingly used in pain treatment because of its advantages such as non-invasive, high precision, and no side effects. Particularly, the infrared laser has stronger tissue penetrating capability, can directly act on a pain part, and promotes tissue repair and pain relief by activating biological effects of cells.
However, in practical application, there is a certain technical problem in infrared laser pain treatment. For example, the irradiation range and power of the laser cannot be precisely controlled to ensure that the painful area is adequately treated without damaging surrounding normal tissue. In addition, due to the difference of the pain parts, accurate positioning and adjustment cannot be performed in the treatment process so as to ensure accurate irradiation of laser.
Disclosure of Invention
The invention aims to provide a laser optical system for a laser analgesic instrument, which solves the problems that the irradiation range and power of laser cannot be accurately controlled and the pain area cannot be accurately positioned and adjusted in the treatment process in the prior art.
In order to achieve the above object, a laser optical system for a laser analgesic apparatus of the present invention includes an infrared laser, an indication light source, a transmission beam expanding system, a laser reflection system, a laser beam combining system, an off-axis beam expanding system, a diaphragm and a parameter control system;
the infrared laser beam emitted by the infrared laser enters the laser reflection system after being expanded by the transmission beam expanding system, the laser beam reflected by the laser reflection system and the beam emitted by the indication light source enter the off-axis beam expanding system after being combined and coaxially output by the laser beam combining system, and the beam after being expanded by the off-axis beam expanding system is output by the diaphragm; and regulating and controlling the power density of the infrared laser and the power density of the indicating light source through the parameter control system.
The transmission beam expanding system comprises a 10-time transmission beam expanding main lens and a 10-time transmission beam expanding secondary lens which are sequentially arranged along the optical axis direction of the infrared laser; the 10-time transmission beam expanding main lens is a concave lens, the 10-time transmission beam expanding secondary lens is a convex lens, and the infrared laser beam emitted by the infrared laser outputs parallel beams after sequentially passing through the 10-time transmission beam expanding main lens and the 10-time transmission beam expanding secondary lens.
The laser optical system further comprises a system power supply, and the system power supply is used for providing required power for the parameter control system, the infrared laser and the indication light source.
The 10-time transmission beam expansion primary lens is a concave lens with two sides coated with an antireflection film of 10.6 mu m, the average transmittance is more than 99%, the 10-time transmission beam expansion secondary lens is a convex lens with two sides coated with an antireflection film of 10.6 mu m, and the average transmittance is more than 99%.
The laser reflection system comprises a first laser reflector, a second laser reflector and a third laser reflector; the first laser reflector, the second laser reflector and the third laser reflector are all 10.6 mu m reflectors with single-sided plating of 10.6 mu m reflecting films, the average reflectivity is more than 99 percent, and the incidence angle of 45 degrees is reflected; the laser emitted by the transmission beam expanding system sequentially passes through the first laser reflector, the second laser reflector and the third laser reflector to be reflected and then enters the laser beam combining system.
The laser beam combining system is a beam combining lens plated with an antireflection film of 10.6 mu m, the average transmittance of which is more than 95 percent, and a reflection film of 650nm, and the average reflectance of which is more than 75 percent.
The off-axis beam expanding system comprises a 5-time off-axis beam expanding main lens and a 5-time off-axis beam expanding secondary lens, and the combined beam emitted by the laser beam combining system sequentially passes through the 5-time off-axis beam expanding main lens and the 5-time off-axis beam expanding secondary lens and then outputs parallel beams.
The 5-fold off-axis beam expander primary mirror and the 5-fold off-axis beam expander secondary mirror are off-axis parabolic mirrors having an average reflectivity of greater than 95% over a range of 10.6 + -0.5 μm and an average reflectivity of greater than 75% at 650 + -50 nm.
The diaphragm is an aperture diaphragm, and the beam diameter of emergent light is controlled through the diaphragm.
The infrared laser is CO 2 The output center wavelength of the radio frequency laser is 10.6 mu m; the indication light source is a semiconductor laser, and the output center wavelength is 650nm.
The beneficial effects of the invention are as follows: in the laser optical system for the laser analgesic apparatus, the laser beam output by the infrared laser expands the diameter of the laser beam to 10 times of the original diameter through the beam expanding system, the laser beam emitted by the laser reflecting system, the laser beam combining system and the indicating light source is coaxially incident to the off-axis beam expanding system, the diameters of the laser beam and the indicating light beam are expanded to 5 times of the original diameter through the off-axis beam expanding system, and finally the laser beam and the indicating light beam are irradiated to a pain area after being limited by a diaphragm.
The laser optical system for the laser analgesic device overcomes the limitations of the traditional analgesic method in the aspects of treatment effect and safety, and has the following effects:
(1) The effects of accurately expanding, reflecting and combining the infrared laser and controlling the laser irradiation range are realized;
(2) Accurate positioning and accurate treatment: the application of the indication light source helps operators to accurately position the laser irradiation position, and the light spots output by the indication light source can be used for realizing the accurate visual positioning of invisible light spots output by the infrared laser, so that the accurate positioning of a pain treatment area is realized, and the treatment of the pain area is convenient to adjust; the treatment can be accurately aligned to the pain area, error irradiation and unnecessary treatment are avoided, and the laser beam output by the infrared laser and the beam output by the indication light source are combined through the application of the laser beam combining system, so that coaxial transmission is realized, and the laser is accurately irradiated to the treatment area. This greatly improves the accuracy of the treatment, ensures that the laser acts on the painful site, and reduces the impact on surrounding normal tissue.
(3) High-efficiency energy transmission: by using the transmission beam expanding system and the off-axis beam expanding system, the diameter of the laser beam is enlarged, so that the distribution of laser energy in a treatment area is increased, the treatment effect is more uniform, and the energy transmission efficiency of the laser is improved.
(4) Improving the treatment effect: due to the improvement of the system accuracy, the infrared laser can better act on the pain area and promote the cell biological effect, thereby accelerating tissue repair and pain relief and improving the treatment effect.
(5) The safety is enhanced: the accuracy and beam control of the system reduces adverse effects on normal tissue, reduces safety risks during treatment, and enables patients to receive treatment more safely.
Drawings
FIG. 1 is a schematic diagram of a laser optical system for a laser analgesic apparatus according to the present invention;
fig. 2 is a schematic view of the optical path structure of a laser optical system for a laser analgesic apparatus according to the present invention.
FIG. 3 is a structural view showing the appearance of a laser optical system for a laser analgesic apparatus according to the present invention;
fig. 4 is a schematic structural diagram of a laser optical system for a laser analgesic apparatus according to the present invention.
Wherein: 1. the infrared laser comprises an infrared laser, 2-time and 10-time transmission beam expanding main mirrors, 3-time and 10-time transmission beam expanding secondary mirrors, 4-time and 5-time first laser reflectors, 5-time and second laser reflectors, 6-time and third laser reflectors, 7-time indication light sources, 8-time and beam combining mirrors, 9-time and 5-time off-axis beam expanding main mirrors, 10-time and 5-time off-axis beam expanding secondary mirrors, 11 and diaphragms.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 4, a laser optical system for a laser analgesic apparatus of the present invention includes an infrared laser 1, an indication light source 7, a transmission beam expanding system, a laser reflection system, a laser beam combining system, an off-axis beam expanding system, a diaphragm 11, and a parameter control system;
the infrared laser beam emitted by the infrared laser 1 enters a laser reflection system after being expanded by a transmission beam expanding system, the laser beam reflected by the laser reflection system and the beam emitted by the indication light source 7 enter an off-axis beam expanding system after being combined and coaxially output by a laser beam combining system, and the beam after being expanded by the off-axis beam expanding system is output by a diaphragm 11; the parameter control system is connected with the infrared laser 1 and the indication light source 7, and the power density of the infrared laser 1 and the power density of the indication light source 7 are regulated and controlled through the parameter control system.
The indication light source 7 is a semiconductor laser and is used for outputting visible red light with the center wavelength of 650nm.
The infrared laser 1 is used for outputting an infrared laser beam, and visual positioning of the indication light source in a pain treatment area of a patient is realized through combining a visible indication light source 7 and invisible laser.
The transmission beam expanding system is used for expanding the laser beam output by the infrared laser 1.
The laser reflection system is used for reflecting the laser beam output by the infrared laser 1 to the off-axis beam expanding system.
The laser beam combining system is used for combining the laser beam output by the infrared laser 1 and the beam output by the indicating light source to realize coaxial transmission.
The off-axis beam expanding system is used for expanding the laser output by the infrared laser 1 and the beam output by the indicating light source.
The transmission beam expanding system comprises a 10-time transmission beam expanding main lens 2 and a 10-time transmission beam expanding secondary lens 3 which are sequentially arranged along the optical axis direction of the infrared laser 1; the 10-time transmission beam expanding main lens 2 is a concave lens, the 10-time transmission beam expanding secondary lens 3 is a convex lens, and the infrared laser beam emitted by the infrared laser 1 sequentially outputs parallel beams after passing through the 10-time transmission beam expanding main lens 2 and the 10-time transmission beam expanding secondary lens 3. The transmission beam expanding system can expand the diameter of the laser beam output by the infrared laser 1 to 10 times of the original diameter.
The laser optical system further comprises a system power supply, through which the required power is provided for the parameter control system, the infrared laser 1 and the indication light source 7. The input voltage of the system power supply is 220V, and the output voltage range is 12V-24V.
The 10-time transmission beam expansion main lens 2 is a concave lens with two sides coated with an antireflection film of 10.6 mu m, the average transmittance is more than 99%, the 10-time transmission beam expansion secondary lens 3 is a convex lens with two sides coated with an antireflection film of 10.6 mu m, and the average transmittance is more than 99%.
The laser reflection system comprises a first laser reflection mirror 4, a second laser reflection mirror 5 and a third laser reflection mirror 6; the first laser reflector 4, the second laser reflector 5 and the third laser reflector 6 are all 10.6 mu m reflectors with single-sided plating of 10.6 mu m reflecting films, the average reflectivity is more than 99 percent, and the incidence angle of 45 degrees is reflected; the laser emitted by the transmission beam expanding system sequentially passes through the first laser reflector 4, the second laser reflector 5 and the third laser reflector 6 to be reflected and then enters the laser beam combining system.
The laser beam combining system is used for combining the laser beam output by the infrared laser 1 and the beam output by the indication light source to realize coaxial transmission; the laser beam combining system is a beam combining lens 8 which is plated with an antireflection film of 10.6 mu m, the average transmittance of which is more than 95 percent, and a reflection film of 650nm, and the average reflectance of which is more than 75 percent.
The off-axis beam expanding system comprises a 5-time off-axis beam expanding main lens 9 and a 5-time off-axis beam expanding secondary lens 10, and is used for expanding the laser output by the infrared laser 1 and the light beam output by the indicating light source. And the beam combination light emitted by the laser beam combination system sequentially passes through the 5-time off-axis beam expansion main lens 9 and the 5-time off-axis beam expansion secondary lens 10 to output parallel light beams. The off-axis beam expanding system can expand the diameters of the laser beam output by the infrared laser 1 and the beam output by the indicating light source to be 5 times of the original diameters.
The 5-times off-axis beam expander primary mirror 9 and the 5-times off-axis beam expander secondary mirror 10 are off-axis parabolic mirrors having an average reflectivity of greater than 95% over a range of 10.6 + -0.5 μm and an average reflectivity of greater than 75% at 650 + -50 nm.
The diaphragm 11 is an aperture diaphragm, and the beam diameter of the emergent light is controlled through the diaphragm 11, so that the change of the infrared beam diameter from 5mm to 100mm can be realized, and the treatment of the area of different pain areas is adapted.
The infrared laser 1 is CO 2 The radio frequency laser has the output center wavelength of 10.6 mu m, the output power of 30W at maximum, the repetition frequency of 0-25kHz and the beam diameter of 2mm; the indication light source 7 is a semiconductor laser, the output center wavelength is 650nm, the output power is 5mW, and the beam diameter is 5mm.
The invention relates to a light path radiation process in a laser optical system for a laser analgesic instrument, which comprises the following steps: the laser beam emitted by the infrared laser 1 is reflected to the beam combining mirror 8 through the first laser reflector 4, the second laser reflector 5 and the third laser reflector 6 at an incidence angle of 45 degrees by the primary projection beam expanding mirror and the secondary projection beam expanding mirror which are 10 times larger than the primary projection beam expanding mirror, and is coaxially incident to the primary beam expanding mirror 9 and the secondary projection beam expanding mirror 10 which are 5 times larger than the primary projection beam expanding mirror, and finally is limited by the diaphragm 11 and irradiated to a pain area.
The invention relates to a laser optical system for a laser analgesic instrument, which can realize the laser radiation flux density of 10-385 mW/cm after the laser beam emitted by an infrared laser 1 is emitted by the system, the duration pulse time is 0.2-15.2 ms 2 Output control of (c).
According to the laser optical system for the laser pain relieving instrument, the infrared laser 1 and the indication light source 7 realize coaxial beam expansion output, and the light spots output by the indication light source 7 can realize accurate visual positioning of invisible light spots output by the infrared laser 1, so that accurate positioning of a pain treatment area is realized, and the pain treatment area is convenient to adjust.
Claims (3)
1. The laser optical system for the laser pain relieving instrument is characterized by comprising an infrared laser (1), an indication light source (7), a transmission beam expanding system, a laser reflecting system, a laser beam combining system, an off-axis beam expanding system, a diaphragm (11) and a parameter control system;
the infrared laser beam emitted by the infrared laser (1) enters a laser reflection system after being expanded by a transmission beam expanding system, the laser beam reflected by the laser reflection system and the beam emitted by the indication light source (7) enter an off-axis beam expanding system after being combined and coaxially output by a laser beam combining system, and the beam after being expanded by the off-axis beam expanding system is output by a diaphragm (11); regulating and controlling the power density of the infrared laser (1) and the power density of the indication light source (7) through the parameter control system;
the transmission beam expanding system comprises a 10-time transmission beam expanding main lens (2) and a 10-time transmission beam expanding secondary lens (3) which are sequentially arranged along the optical axis direction of the infrared laser (1); the 10-time transmission beam expanding main lens (2) is a concave lens, the 10-time transmission beam expanding secondary lens (3) is a convex lens, and the infrared laser beam emitted by the infrared laser (1) is sequentially transmitted by the 10-time transmission beam expanding main lens (2) and the 10-time transmission beam expanding secondary lens (3) and then outputs parallel beams;
the 10-time transmission beam expansion primary mirror (2) is a concave lens with two sides coated with an antireflection film of 10.6 mu m, the average transmittance is more than 99%, the 10-time transmission beam expansion secondary mirror (3) is a convex lens with two sides coated with an antireflection film of 10.6 mu m, and the average transmittance is more than 99%;
the laser reflection system comprises a first laser reflector (4), a second laser reflector (5) and a third laser reflector (6); the first laser reflector (4), the second laser reflector (5) and the third laser reflector (6) are all 10.6 mu m reflectors with single-sided 10.6 mu m reflecting films plated, the average reflectivity is more than 99 percent, and the incidence angle of 45 degrees is reflected; the laser emitted by the transmission beam expanding system sequentially passes through a first laser reflector (4), a second laser reflector (5) and a third laser reflector (6) to be reflected and then enters the laser beam combining system;
the laser beam combining system is a beam combining lens (8) plated with an antireflection film of 10.6 mu m, an average transmittance of more than 95 percent and a 650nm reflecting film, and an average reflectance of more than 75 percent;
the off-axis beam expanding system comprises a 5-time off-axis beam expanding main lens (9) and a 5-time off-axis beam expanding secondary lens (10), and the combined beam emitted by the laser beam combining system sequentially passes through the 5-time off-axis beam expanding main lens (9) and the 5-time off-axis beam expanding secondary lens (10) and then outputs parallel beams;
the 5-times off-axis beam expanding main mirror (9) and the 5-times off-axis beam expanding secondary mirror (10) are off-axis parabolic mirrors with an average reflectivity of more than 95% over a range of 10.6+/-0.5 μm and an average reflectivity of more than 75% at 650+/-50 nm;
the infrared laser (1) is CO 2 The output center wavelength of the radio frequency laser is 10.6 mu m; the indication light source (7) is a semiconductor laser, and the output center wavelength is 650nm.
2. A laser optical system for a laser analgesic apparatus according to claim 1, characterized in that the laser optical system further comprises a system power supply by means of which the required power is supplied to the parameter control system, the infrared laser (1) and the indicating light source (7).
3. A laser optical system for a laser analgesic apparatus according to claim 1, characterized in that the diaphragm (11) is an aperture diaphragm, the beam diameter of the outgoing light being controlled by the diaphragm (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410020422.9A CN117504158B (en) | 2024-01-08 | 2024-01-08 | Laser optical system for laser pain relieving instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410020422.9A CN117504158B (en) | 2024-01-08 | 2024-01-08 | Laser optical system for laser pain relieving instrument |
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| Publication Number | Publication Date |
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| CN117504158A CN117504158A (en) | 2024-02-06 |
| CN117504158B true CN117504158B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410020422.9A Active CN117504158B (en) | 2024-01-08 | 2024-01-08 | Laser optical system for laser pain relieving instrument |
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2024
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| JP2001018084A (en) * | 1999-07-02 | 2001-01-23 | Nec Corp | Laser beam machining optical system and laser beam output monitoring optical system |
| JP2003329408A (en) * | 2002-05-09 | 2003-11-19 | Ricoh Co Ltd | Laser length-measurement device |
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| Publication number | Publication date |
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| CN117504158A (en) | 2024-02-06 |
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