Wide-view laser protective goggles

Abstract

The invention discloses a pair of wide-view laser protective goggles which comprises a goggle frame and a protective lens, the protective lens is clamped on the inner side of the goggle frame, the protective lens and the goggle frame are detachably connected, and the protective lens comprises an outer-layer protective piece, an inner-layer anti-fog piece and a liquid crystal tunable optical filter. The liquid crystal tunable optical filter is arranged between the outer-layer protection sheet and the inner-layer anti-fog sheet, the liquid crystal tunable optical filter, the outer-layer protection sheet and the inner-layer anti-fog sheet are connected in a bonding mode, the glasses frame is electrically connected with the protection lenses, and an MCU control module is arranged in the glasses frame and used for controlling the liquid crystal tunable optical filter. The liquid crystal tunable optical filter is arranged in the protective lens, the liquid crystal tunable optical filter utilizes the electro-optical effect of liquid crystal, a liquid crystal layer is embedded in the liquid crystal tunable optical filter, different electric fields are applied, the orientation of liquid crystal molecules can be changed, and therefore the absorption and reflection characteristics of the lens to lasers with different wavelengths are adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of protective goggles, in particular to a pair of wide-view laser protective goggles. Background Art

[0002] With the widespread application of laser technology in many fields such as military, industry, medical and scientific research, the potential harm of laser to human eyes has become increasingly prominent. For example, in scenes such as laser cutting and welding in industry, laser ranging and laser guidance in the military field, and laser surgery in the medical field, operators or surrounding personnel may be exposed to high-intensity laser radiation.

[0003] Although traditional laser protective goggles can block lasers to a certain extent, they have the problem of narrow field of view. In many application scenarios where a large area needs to be observed at the same time, the narrow field of view seriously affects the user's work efficiency and safety. For example, in industrial production sites, operators need to be able to clearly observe the situation in the entire work area while protecting against lasers to ensure the accuracy and safety of operations. In a military combat environment, soldiers need to keep an eye on the vast battlefield environment while protecting themselves from possible enemy laser weapon attacks. Therefore, some new types of goggles with better laser protection functions have now appeared on the market.

[0004] For example, a Chinese patent with publication number CN210155356U discloses a film layer, a goggles and goggles, wherein the film includes a laser protection film layer and a visible light transmittance-enhancing layer connected together; the film layer has a good reflection effect on laser and a good transmission effect on visible light; the goggles including the film layer have a good reflection effect on laser and a good transmission effect on visible light, and have good hardness, impact resistance and wear resistance; the goggles including the goggles have a good protection effect on laser, and can increase the transmittance of visible light, making the field of vision brighter, and can be used as eye protection equipment in laser protection.

[0005] The goggles provided by the above patent are goggles with good laser protection function, but this kind of anti-laser goggles cannot protect against lasers of different wavelengths emitted from different directions, resulting in limited protection effect against lasers. Summary of the invention

[0006] The purpose of the present invention is to provide a wide-field laser protection goggles, aiming to improve the problem that the existing anti-laser goggles cannot protect lasers of different wavelengths emitted from different directions, resulting in limited protection effect against lasers.

[0007] The present invention is achieved in that:

[0008] A wide-field laser protective goggles comprises a frame and a protective lens, wherein the protective lens is detachably engaged with the inner side of the frame, and comprises an outer protective sheet, a liquid crystal tunable filter and an inner anti-fog sheet which are sequentially arranged from the outside to the inside, wherein the outer protective sheet, the liquid crystal tunable filter and the inner anti-fog sheet are bonded and connected to each other; an MCU control module is built into the frame, and the liquid crystal tunable filter is electrically connected to the MCU control module.

[0009] Furthermore, connecting buckles are symmetrically provided on both sides of the frame, and baffles are provided along the outer sides of the connecting buckles on both sides of the frame; a power supply unit is provided on the top of the frame, and the power supply unit is used to supply power to the entire frame to maintain the operation of the liquid crystal tunable filter, and a charging connector is provided at the front end of the power supply unit; a nose pad is provided at the bottom of the frame, and communication slots are symmetrically provided along both sides of the nose pad inside the frame, and the communication slots are used to be electrically connected to the protective lenses.

[0010] Furthermore, the MCU control module is connected to a power module, a control signal generating module, a temperature control module and a communication interface module; the power module is connected to the power supply unit, and is used to provide a stable operating voltage to the liquid crystal tunable filter; the control signal generating module is used to adjust parameters such as the filtering wavelength and bandwidth of the liquid crystal tunable filter; the temperature control module is used to keep the operating temperature of the liquid crystal tunable filter stable; the communication interface module is connected to the communication slot, and is used to connect the liquid crystal tunable filter to the built-in control system of the frame.

[0011] Furthermore, the protective lens is provided with a frame on the edge of one side facing the inner side of the frame, and limit clamps are provided on both sides of the top of the protective lens for being connected to the frame; a bayonet is provided at the bottom of the protective lens, and the bayonet is used to engage with the nose pad position of the frame; a plurality of electrical contacts are provided on the top of the protective lens for being electrically connected to the frame; an outer protective sheet is provided at the bottom of the protective lens, and the outer surface of the outer protective sheet is coated with a thin film with anti-fog function, and the inner surface of the inner anti-fog sheet is coated with an anti-fog chemical coating, which is used to ensure that both the inner and outer surfaces of the protective lens have an anti-fog effect.

[0012] Furthermore, the liquid crystal tunable filter includes a liquid crystal layer, and both sides of the liquid crystal layer are provided with a liquid crystal alignment layer, a reflective layer, an ITO conductive layer, a glass substrate and an anti-reflection film in sequence from the inside to the outside; the liquid crystal layer and the liquid crystal alignment layer are used to block the laser; the reflective layer is used to reflect the laser; the ITO conductive layer is used to energize the liquid crystal tunable filter, the glass substrate is used to ensure that the liquid crystal tunable filter has a certain strength, and the anti-reflection film is used to reduce the reflection loss of light.

[0013] Furthermore, the reflective layer realizes the laser protection function based on the thin film interference principle. For vertically incident light, the calculation formula of the reflectivity R is:

[0014]

[0015] Where n0 is the refractive index of the incident medium, n s It is the refractive index of the reflective layer material. By selecting the appropriate reflective layer material and thickness, lasers of a specific wavelength can be made to produce destructive interference, thereby greatly reducing the transmittance of the laser and achieving protection against the laser.

[0016] The anti-reflection film is used to reduce the reflection loss on the lens surface and improve the light transmittance of the lens. The thickness d of the anti-reflection film satisfies the formula:

[0017]

[0018] Among them, λ is the wavelength of light that needs to be enhanced, and n is the refractive index of the anti-reflection film material; by coating the surface of the lens with a suitable anti-reflection film, the overall light transmittance of the eyepiece can be improved, allowing the wearer to obtain a clearer field of view.

[0019] Furthermore, it also includes a strap, the material of the strap is leather, and the two ends of the strap close to the frame are respectively provided with binding heads, the middle of the binding head is provided with a binding opening, and the binding opening is connected to the frame; and the middle of the strap is provided with a connecting part.

[0020] Furthermore, it also includes a tightening assembly, which is connected to the connecting part. The tightening assembly includes a storage tube, a limit plate and a rotating shaft. The rotating shaft is inserted into the storage tube and is rotatably connected to the storage tube. A limit plate is provided at the top of the storage tube. The limit plate is used to limit mutual positioning with the top of the rotating shaft, and the strap passes through the middle of the rotating shaft.

[0021] Furthermore, two through holes are provided on the side of the storage tube, and bearings are provided at the bottom and the top of the inner side of the storage tube, a plurality of slots are provided on the upper surface of the storage tube, and plug posts are provided at positions of the bottom of the limit plate aligned with the slots, a return spring is provided at the bottom of the plug post, and the plug post is inserted into the slot, a plurality of slots are provided on the upper surface of the limit plate, and a sleeve hole is provided in the middle of the limit plate for being sleeved on the rotating shaft.

[0022] Furthermore, a connecting hole is provided in the middle of the rotating shaft, and the connecting hole is used for a strap to pass through the middle of the rotating shaft; connecting shafts are provided at the bottom and top of the rotating shaft, and the connecting shafts are interference connected with the bearing, and a chuck is provided at the end of the top of the connecting shaft that protrudes out of the storage tube, and teeth are provided at the position where the bottom surface of the chuck is aligned with the slot, and a knob is provided on the upper surface of the chuck for rotating the rotating shaft.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention integrates various components inside the frame to control the protective lens. A liquid crystal tunable filter is provided inside the protective lens. This liquid crystal tunable filter utilizes the electro-optical effect of liquid crystal. By embedding a liquid crystal layer in the liquid crystal tunable filter and applying different electric fields, the orientation of the liquid crystal molecules can be changed, thereby adjusting the absorption and reflection characteristics of the lens to lasers of different wavelengths. Within a wide field of view, multiple micro-electrode arrays can independently control different areas of the liquid crystal layer to achieve adaptive protection against complex laser environments. When lasers of different wavelengths appear in different directions in the field of view, the liquid crystal molecules in the corresponding areas adjust their states to block the lasers, greatly improving the protective effect of the protective goggles against lasers.

[0025] 2. The present invention installs a strap behind the frame, and the protective goggles can be stably fastened to the patient's eyes through the strap, so as to stably protect against laser.

[0026] 3. The present invention installs a tightening assembly at the rear end of the restraint belt, and the restraint belt can be tightened by rotating the tightening assembly, thereby ensuring that the restraint belt stably binds the protective goggles to the head of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the mirror frame of the present invention;

[0029] Figure 3 It is a block diagram of the internal structure of the mirror frame of the present invention;

[0030] Figure 4 It is a schematic structural diagram of the protective lens of the present invention;

[0031] Figure 5 Schematic diagram of the layered structure of the protective lens of the present invention;

[0032] Figure 6 It is a schematic diagram of the layered structure of the liquid crystal tunable filter of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the binding strap of the present invention;

[0034] Figure 8 It is a structural schematic diagram of the tightening assembly of the present invention.

[0035] In the figure: 1, frame; 11, connecting buckle; 12, baffle; 13, power supply; 14, charging connector; 15, communication slot; 16, nose pad; 2, protective lens; 21, frame; 22, limit clamp; 23, electrical contact; 24, bayonet; 25, outer protective sheet; 26, inner anti-fog sheet; 27, liquid crystal tunable filter; 271, liquid crystal layer; 272, liquid crystal alignment layer; 273, reflective layer; 274, I TO conductive layer; 275, glass substrate; 276, anti-reflection film; 3, binding tape; 31, binding head; 32, binding mouth; 33, connecting part; 4, tightening assembly; 41, storage tube; 411, perforation; 412, slot; 413, bearing; 42, limit plate; 421, plug column; 422, reset spring; 423, slot; 424, sleeve hole; 43, rotating shaft; 431, connecting hole; 432, connecting shaft; 433, chuck; 434, tooth; 435, knob. DETAILED DESCRIPTION

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0038] Example 1

[0039] like Figure 1 , Figure 3 and Figure 5As shown, a wide-view laser protective goggles includes a frame 1 and a protective lens 2. The protective lens 2 is engaged with the inner side of the frame 1, and the protective lens 2 and the frame 1 are detachably connected. This structure is convenient for replacing the protective lens 2 after the protective lens 2 is damaged. The protective lens 2 includes an outer protective sheet 25, an inner anti-fog sheet 26, and a liquid crystal tunable filter 27. The liquid crystal tunable filter 27 is arranged between the outer protective sheet 25 and the inner anti-fog sheet 26, and the liquid crystal tunable filter 27, the outer protective sheet 25, and the inner anti-fog sheet 26 are bonded and connected. This structure can make the liquid crystal tunable filter 27 well protected, and at the same time, the outer protective sheet 25 and the inner anti-fog sheet 26 can effectively play an anti-fog role, and after bonding, the protective lens 2 can have good integrity; when bonding, it is necessary to ensure that the layers are closely combined without affecting the optical performance, and at the same time, the thickness and order of each layer should be optimized to achieve the best balance between laser protection and field of view. The frame 1 and the protective lens 2 are electrically connected. The frame 1 has a built-in MCU control module, which is used to control the liquid crystal tunable filter 27. Through this structure, the frame 1 can cooperate with the protective lens 2 to effectively block the mechanism and achieve better laser protection effect.

[0040] like Figure 2 As shown, the frame 1 is symmetrically provided with connecting buckles 11 on both sides, and the connecting buckles 11 are convenient for connecting the frame 1 with the ear pads or the straps 3. And baffles 12 are provided along the outer sides of the connecting buckles 11 on both sides of the frame 1; the baffles 12 are convenient for blocking the connecting part 33 to ensure the stability of the ear pads or the straps 3, and also make the entire protective goggles look more beautiful. A power supply unit 13 is provided at the top of the frame 1, and the power supply unit 13 is used to power the entire frame 1 to maintain the operation of the liquid crystal tunable filter 27. A charging connector 14 is provided at the front end of the power supply unit 13; the charging connector 14 is convenient for charging the battery inside the power supply unit 13. A nose pad 16 is provided at the bottom of the frame 1, and the nose pad 16 is convenient for snapping on the nose, so as to facilitate the stable use of the entire protective goggles. And communication slots 15 are symmetrically provided along the two sides of the nose pad 16 inside the frame 1, and the communication slots 15 are used to be electrically connected to the protective lens 2.

[0041] like Figure 3 As shown, the MCU control module is connected with a power module, a control signal generating module, a temperature control module and a communication interface module; the power module is connected to the power supply unit 13, and is used to provide a stable working voltage to the liquid crystal tunable filter 27; the control signal generating module is used to adjust the filtering wavelength and bandwidth and other parameters of the liquid crystal tunable filter 27; the temperature control module is used to keep the working temperature of the liquid crystal tunable filter 27 stable; the communication interface module is connected to the communication slot 15, and is used to connect the liquid crystal tunable filter 27 to the built-in control system of the frame 1.

[0042] like Figure 4 and Figure 5 As shown, the edge of the protective lens 2 facing the inner side of the frame 1 is provided with a frame 21, and the top two sides of the protective lens 2 are provided with limit clamps 22, which are used to be connected with the frame 1, so as to facilitate the detachable connection between the protective lens 2 and the frame 1; the bottom of the protective lens 2 is provided with a bayonet 24, which is used to be engaged with the nose pad 16 of the frame 1; the top of the protective lens 2 is provided with a plurality of electrical contacts 23, which are used to be electrically connected with the frame 1; the bottom of the protective lens 2 is provided with an outer protective sheet 25, the outer surface of which is coated with a film with anti-fog function, such as polyvinyl alcohol (PVA). The PVA molecular chain contains a large number of hydroxyl groups (-OH), which are hydrophilic groups that can absorb water molecules to keep the lens surface moist and avoid fogging. The inner surface of the inner anti-fog sheet 26 is coated with an anti-fog chemical coating, which is used to ensure that the inner and outer surfaces of the protective lens 2 have an anti-fog effect. The specific processing method of the anti-fog chemical coating is to apply a solution containing an anti-fog agent on the lens surface by dipping, spraying or spin coating. If it is the dipping method, the lens will be immersed in the anti-fog solution for a certain period of time, generally 30 seconds to 2 minutes, and then slowly taken out to allow the excess solution to drip naturally. The spraying method can more accurately control the thickness and uniformity of the coating. The spraying pressure is generally between 0.1-0.5MPa, and the amount of each spray can be adjusted according to the size of the lens and the required coating thickness. After coating, the coating needs to be cured so that the anti-fog agent forms a stable coating on the surface of the lens. Curing can be done by thermal curing or light curing. Thermal curing requires placing the lens in an oven and baking it at a certain temperature (such as 80-120°C) for a certain time (such as 30-60 minutes). Light curing uses light of a specific wavelength, such as ultraviolet rays, to irradiate the lens, causing the anti-fog agent to undergo a photochemical reaction and solidify. The irradiation time may be between a few minutes and more than ten minutes.

[0043] like Figure 6 As shown, the liquid crystal tunable filter 27 includes a liquid crystal layer 271, and both sides of the liquid crystal layer 271 are provided with a liquid crystal alignment layer 272, a reflective layer 273, an ITO conductive layer 274, a glass substrate 275 and an anti-reflection film 276 in sequence from the inside to the outside; the liquid crystal layer 271 and the liquid crystal alignment layer 272 are used to block the laser; the reflective layer 273 is used to reflect the laser; the ITO conductive layer 274 is used to energize the liquid crystal tunable filter 27, the glass substrate 275 is used to ensure that the liquid crystal tunable filter 27 has a certain strength, and the anti-reflection film 276 is used to reduce the reflection loss of light.

[0044] The reflective layer 273 realizes the laser protection function based on the thin film interference principle. For vertically incident light, the calculation formula of the reflectivity R is:

[0045]

[0046] Where n0 is the refractive index of the incident medium (usually air, n0 = 1), s is the refractive index of the material of the reflective layer 273; by selecting a suitable material and thickness of the reflective layer 273, lasers of a specific wavelength can be made to produce destructive interference, thereby greatly reducing the transmittance of the laser and achieving protection against the laser;

[0047] The anti-reflection film 276 is used to reduce the reflection loss on the lens surface and improve the light transmittance of the lens. The thickness d of the anti-reflection film satisfies the formula:

[0048]

[0049] Among them, λ is the wavelength of light that needs to be enhanced, and n is the refractive index of the anti-reflection film material; by coating the surface of the lens with a suitable anti-reflection film, the overall light transmittance of the eyepiece can be improved, allowing the wearer to obtain a clearer field of view.

[0050] Example 2

[0051] like Figure 1 , Figure 3 and Figure 5 As shown, a wide-view laser protective goggles includes a frame 1 and a protective lens 2. The protective lens 2 is engaged with the inner side of the frame 1, and the protective lens 2 and the frame 1 are detachably connected. This structure is convenient for replacing the protective lens 2 after the protective lens 2 is damaged. The protective lens 2 includes an outer protective sheet 25, an inner anti-fog sheet 26, and a liquid crystal tunable filter 27. The liquid crystal tunable filter 27 is arranged between the outer protective sheet 25 and the inner anti-fog sheet 26, and the liquid crystal tunable filter 27, the outer protective sheet 25, and the inner anti-fog sheet 26 are bonded and connected. This structure can make the liquid crystal tunable filter 27 well protected, and at the same time, the outer protective sheet 25 and the inner anti-fog sheet 26 can effectively play an anti-fog role, and after bonding, the protective lens 2 can have good integrity; when bonding, it is necessary to ensure that the layers are closely combined without affecting the optical performance, and at the same time, the thickness and order of each layer should be optimized to achieve the best balance between laser protection and field of view. The frame 1 and the protective lens 2 are electrically connected. The frame 1 has a built-in MCU control module, which is used to control the liquid crystal tunable filter 27. Through this structure, the frame 1 can cooperate with the protective lens 2 to effectively block the mechanism and achieve better laser protection effect.

[0052] like Figure 2As shown, the frame 1 is symmetrically provided with connecting buckles 11 on both sides, and the connecting buckles 11 are convenient for connecting the frame 1 with the ear pads or the straps 3. And baffles 12 are provided along the outer sides of the connecting buckles 11 on both sides of the frame 1; the baffles 12 are convenient for blocking the connecting part 33 to ensure the stability of the ear pads or the straps 3, and also make the entire protective goggles look more beautiful. A power supply unit 13 is provided at the top of the frame 1, and the power supply unit 13 is used to power the entire frame 1 to maintain the operation of the liquid crystal tunable filter 27. A charging connector 14 is provided at the front end of the power supply unit 13; the charging connector 14 is convenient for charging the battery inside the power supply unit 13. A nose pad 16 is provided at the bottom of the frame 1, and the nose pad 16 is convenient for snapping on the nose, so as to facilitate the stable use of the entire protective goggles. And communication slots 15 are symmetrically provided along the two sides of the nose pad 16 inside the frame 1, and the communication slots 15 are used to be electrically connected to the protective lens 2.

[0053] like Figure 3 As shown, the MCU control module is connected with a power module, a control signal generating module, a temperature control module and a communication interface module; the power module is connected to the power supply unit 13, and is used to provide a stable working voltage to the liquid crystal tunable filter 27; the control signal generating module is used to adjust the filtering wavelength and bandwidth and other parameters of the liquid crystal tunable filter 27; the temperature control module is used to keep the working temperature of the liquid crystal tunable filter 27 stable; the communication interface module is connected to the communication slot 15, and is used to connect the liquid crystal tunable filter 27 to the built-in control system of the frame 1.

[0054] like Figure 4 and Figure 5As shown, the edge of the protective lens 2 facing the inner side of the frame 1 is provided with a frame 21, and the top two sides of the protective lens 2 are provided with limit clamps 22, which are used to be connected with the frame 1, so as to facilitate the detachable connection between the protective lens 2 and the frame 1; the bottom of the protective lens 2 is provided with a bayonet 24, which is used to be engaged with the nose pad 16 of the frame 1; the top of the protective lens 2 is provided with a plurality of electrical contacts 23, which are used to be electrically connected with the frame 1; the bottom of the protective lens 2 is provided with an outer protective sheet 25, the outer surface of which is coated with a film with anti-fog function, such as polyvinyl alcohol (PVA). The PVA molecular chain contains a large number of hydroxyl groups (-OH), which are hydrophilic groups that can absorb water molecules to keep the lens surface moist and avoid fogging. The inner surface of the inner anti-fog sheet 26 is coated with an anti-fog chemical coating, which is used to ensure that the inner and outer surfaces of the protective lens 2 have an anti-fog effect. The specific processing method of the anti-fog chemical coating is to apply a solution containing an anti-fog agent on the lens surface by dipping, spraying or spin coating. If it is the dipping method, the lens will be immersed in the anti-fog solution for a certain period of time, generally 30 seconds to 2 minutes, and then slowly taken out to allow the excess solution to drip naturally. The spraying method can more accurately control the thickness and uniformity of the coating. The spraying pressure is generally between 0.1-0.5MPa, and the amount of each spray can be adjusted according to the size of the lens and the required coating thickness. After coating, the coating needs to be cured so that the anti-fog agent forms a stable coating on the surface of the lens. Curing can be done by thermal curing or light curing. Thermal curing requires placing the lens in an oven and baking it at a certain temperature (such as 80-120°C) for a certain time (such as 30-60 minutes). Light curing uses light of a specific wavelength, such as ultraviolet rays, to irradiate the lens, causing the anti-fog agent to undergo a photochemical reaction and solidify. The irradiation time may be between a few minutes and more than ten minutes.

[0055] like Figure 6 As shown, the liquid crystal tunable filter 27 includes a liquid crystal layer 271, and both sides of the liquid crystal layer 271 are provided with a liquid crystal alignment layer 272, a reflective layer 273, an ITO conductive layer 274, a glass substrate 275 and an anti-reflection film 276 in sequence from the inside to the outside; the liquid crystal layer 271 and the liquid crystal alignment layer 272 are used to block the laser; the reflective layer 273 is used to reflect the laser; the ITO conductive layer 274 is used to energize the liquid crystal tunable filter 27, the glass substrate 275 is used to ensure that the liquid crystal tunable filter 27 has a certain strength, and the anti-reflection film 276 is used to reduce the reflection loss of light.

[0056] The reflective layer 273 realizes the laser protection function based on the thin film interference principle. For vertically incident light, the calculation formula of the reflectivity R is:

[0057]

[0058] Where n0 is the refractive index of the incident medium (usually air, n0 = 1),s is the refractive index of the material of the reflective layer 273; by selecting a suitable material and thickness of the reflective layer 273, lasers of a specific wavelength can be made to produce destructive interference, thereby greatly reducing the transmittance of the laser and achieving protection against the laser;

[0059] The anti-reflection film 276 is used to reduce the reflection loss on the lens surface and improve the light transmittance of the lens. The thickness d of the anti-reflection film satisfies the formula:

[0060]

[0061] Among them, λ is the wavelength of light that needs to be enhanced, and n is the refractive index of the anti-reflection film material; by coating the surface of the lens with a suitable anti-reflection film, the overall light transmittance of the eyepiece can be improved, allowing the wearer to obtain a clearer field of view.

[0062] like Figure 7 As shown, it also includes a strap 3, which is made of leather. The strap 3 of this structure has a good tensile resistance. The strap 3 is provided with a binding head 31 at both ends close to the frame 1, and a binding opening 32 is provided in the middle of the binding head 31. The binding opening 32 is connected to the frame 1, so that the strap 3 can be used with the frame 1 to bind the frame 1 to the head of the user. The strap 3 is provided with a connecting portion 33 in the middle, which is convenient for connecting other components.

[0063] Example 3

[0064] like Figure 1 , Figure 3 and Figure 5 As shown, a wide-view laser protective goggles includes a frame 1 and a protective lens 2. The protective lens 2 is engaged with the inner side of the frame 1, and the protective lens 2 and the frame 1 are detachably connected. This structure is convenient for replacing the protective lens 2 after the protective lens 2 is damaged. The protective lens 2 includes an outer protective sheet 25, an inner anti-fog sheet 26, and a liquid crystal tunable filter 27. The liquid crystal tunable filter 27 is arranged between the outer protective sheet 25 and the inner anti-fog sheet 26, and the liquid crystal tunable filter 27, the outer protective sheet 25, and the inner anti-fog sheet 26 are bonded and connected. This structure can make the liquid crystal tunable filter 27 well protected, and at the same time, the outer protective sheet 25 and the inner anti-fog sheet 26 can effectively play an anti-fog role, and after bonding, the protective lens 2 can have good integrity; when bonding, it is necessary to ensure that the layers are closely combined without affecting the optical performance, and at the same time, the thickness and order of each layer should be optimized to achieve the best balance between laser protection and field of view. The frame 1 and the protective lens 2 are electrically connected. The frame 1 has a built-in MCU control module, which is used to control the liquid crystal tunable filter 27. Through this structure, the frame 1 can cooperate with the protective lens 2 to effectively block the mechanism and achieve better laser protection effect.

[0065] like Figure 2 As shown, the frame 1 is symmetrically provided with connecting buckles 11 on both sides, and the connecting buckles 11 are convenient for connecting the frame 1 with the ear pads or the straps 3. And baffles 12 are provided along the outer sides of the connecting buckles 11 on both sides of the frame 1; the baffles 12 are convenient for blocking the connecting part 33 to ensure the stability of the ear pads or the straps 3, and also make the entire protective goggles look more beautiful. A power supply unit 13 is provided at the top of the frame 1, and the power supply unit 13 is used to power the entire frame 1 to maintain the operation of the liquid crystal tunable filter 27. A charging connector 14 is provided at the front end of the power supply unit 13; the charging connector 14 is convenient for charging the battery inside the power supply unit 13. A nose pad 16 is provided at the bottom of the frame 1, and the nose pad 16 is convenient for snapping on the nose, so as to facilitate the stable use of the entire protective goggles. And communication slots 15 are symmetrically provided along the two sides of the nose pad 16 inside the frame 1, and the communication slots 15 are used to be electrically connected to the protective lens 2.

[0066] like Figure 3 As shown, the MCU control module is connected with a power module, a control signal generating module, a temperature control module and a communication interface module; the power module is connected to the power supply unit 13, and is used to provide a stable working voltage to the liquid crystal tunable filter 27; the control signal generating module is used to adjust the filtering wavelength and bandwidth and other parameters of the liquid crystal tunable filter 27; the temperature control module is used to keep the working temperature of the liquid crystal tunable filter 27 stable; the communication interface module is connected to the communication slot 15, and is used to connect the liquid crystal tunable filter 27 to the built-in control system of the frame 1.

[0067] like Figure 4 and Figure 5As shown, the edge of the protective lens 2 facing the inner side of the frame 1 is provided with a frame 21, and the top two sides of the protective lens 2 are provided with limit clamps 22, which are used to be connected with the frame 1, so as to facilitate the detachable connection between the protective lens 2 and the frame 1; the bottom of the protective lens 2 is provided with a bayonet 24, which is used to be engaged with the nose pad 16 of the frame 1; the top of the protective lens 2 is provided with a plurality of electrical contacts 23, which are used to be electrically connected with the frame 1; the bottom of the protective lens 2 is provided with an outer protective sheet 25, the outer surface of which is coated with a film with anti-fog function, such as polyvinyl alcohol (PVA). The PVA molecular chain contains a large number of hydroxyl groups (-OH), which are hydrophilic groups that can absorb water molecules to keep the lens surface moist and avoid fogging. The inner surface of the inner anti-fog sheet 26 is coated with an anti-fog chemical coating, which is used to ensure that the inner and outer surfaces of the protective lens 2 have an anti-fog effect. The specific processing method of the anti-fog chemical coating is to apply a solution containing an anti-fog agent on the lens surface by dipping, spraying or spin coating. If it is the dipping method, the lens will be immersed in the anti-fog solution for a certain period of time, generally 30 seconds to 2 minutes, and then slowly taken out to allow the excess solution to drip naturally. The spraying method can more accurately control the thickness and uniformity of the coating. The spraying pressure is generally between 0.1-0.5MPa, and the amount of each spray can be adjusted according to the size of the lens and the required coating thickness. After coating, the coating needs to be cured so that the anti-fog agent forms a stable coating on the surface of the lens. Curing can be done by thermal curing or light curing. Thermal curing requires placing the lens in an oven and baking it at a certain temperature (such as 80-120°C) for a certain time (such as 30-60 minutes). Light curing uses light of a specific wavelength, such as ultraviolet rays, to irradiate the lens, causing the anti-fog agent to undergo a photochemical reaction and solidify. The irradiation time may be between a few minutes and more than ten minutes.

[0068] like Figure 6 As shown, the liquid crystal tunable filter 27 includes a liquid crystal layer 271, and both sides of the liquid crystal layer 271 are provided with a liquid crystal alignment layer 272, a reflective layer 273, an ITO conductive layer 274, a glass substrate 275 and an anti-reflection film 276 in sequence from the inside to the outside; the liquid crystal layer 271 and the liquid crystal alignment layer 272 are used to block the laser; the reflective layer 273 is used to reflect the laser; the ITO conductive layer 274 is used to energize the liquid crystal tunable filter 27, the glass substrate 275 is used to ensure that the liquid crystal tunable filter 27 has a certain strength, and the anti-reflection film 276 is used to reduce the reflection loss of light.

[0069] The reflective layer 273 realizes the laser protection function based on the thin film interference principle. For vertically incident light, the calculation formula of the reflectivity R is:

[0070]

[0071] Where n0 is the refractive index of the incident medium (usually air, n0 = 1),s is the refractive index of the material of the reflective layer 273; by selecting a suitable material and thickness of the reflective layer 273, lasers of a specific wavelength can be made to produce destructive interference, thereby greatly reducing the transmittance of the laser and achieving protection against the laser;

[0072] The anti-reflection film 276 is used to reduce the reflection loss on the lens surface and improve the light transmittance of the lens. The thickness d of the anti-reflection film satisfies the formula:

[0073]

[0074] Among them, λ is the wavelength of light that needs to be enhanced, and n is the refractive index of the anti-reflection film material; by coating the surface of the lens with a suitable anti-reflection film, the overall light transmittance of the eyepiece can be improved, allowing the wearer to obtain a clearer field of view.

[0075] like Figure 7 As shown, it also includes a strap 3, which is made of leather. The strap 3 of this structure has a good tensile resistance. The strap 3 is provided with a binding head 31 at both ends close to the frame 1, and a binding opening 32 is provided in the middle of the binding head 31. The binding opening 32 is connected to the frame 1, so that the strap 3 can be used with the frame 1 to bind the frame 1 to the head of the user. The strap 3 is provided with a connecting portion 33 in the middle, which is convenient for connecting other components.

[0076] like Figure 8As shown, it also includes a tightening component 4, which is connected to the connecting part 33. The tightening component 4 is convenient for tightening or loosening the strap 3, so that different wearers can stably tie the protective goggles to their heads. The tightening component 4 includes a storage tube 41, a limiting disk 42 and a rotating shaft 43. The rotating shaft 43 is inserted into the storage tube 41 and is rotatably connected to the storage tube 41. The top of the storage tube 41 is provided with a limiting disk 42, which is used to limit each other with the top of the rotating shaft 43. The strap 3 passes through the middle of the rotating shaft 43. By rotating the rotating shaft 43, the strap 3 can be rolled into the storage tube 41 or released from the storage tube 41, so as to achieve the purpose of tightening or loosening the strap 3; by limiting each other between the top of the rotating shaft 43 and the limiting disk 42, the tightened strap 3 will not loosen automatically. Two through holes 411 are provided on the side of the storage tube 41, and the through holes 411 are convenient for the strap 3 to pass into the storage tube 41. Bearings 413 are provided at the bottom and top of the inner side of the storage tube 41, and the bearings 413 are conveniently connected to the rotating shaft 43. A plurality of slots 412 are provided on the upper surface of the storage tube 41, and the slots 412 are convenient for the limit plate 42 to be plugged and connected to the storage tube 41. A plug post 421 is provided at the bottom of the limit plate 42 aligned with the slot 412, and a reset spring 422 is provided at the bottom of the plug post 421, and the plug post 421 is inserted into the slot 412. This structure is convenient for pressing down the limit plate 42 when the strap 3 needs to be loosened, so that the limit plate 42 is staggered with the top of the rotating shaft 43. A plurality of card slots 423 are provided on the upper surface of the limit plate 42, and the card slots 423 are convenient for mutual engagement and limiting with the top of the rotating shaft 43. A sleeve hole 424 is provided in the middle of the limit plate 42 for sleeved on the rotating shaft 43. A connecting hole 431 is provided in the middle of the rotating shaft 43, and the connecting hole 431 is used for the strap 3 to pass through the middle of the rotating shaft 43; a connecting shaft 432 is provided at the bottom and top of the rotating shaft 43, and the connecting shaft 432 is interference-connected with the bearing 413 to facilitate the rotation of the rotating shaft 43. A chuck 433 is provided at one end of the top of the connecting shaft 432 that protrudes out of the storage tube 41, and a position where the bottom surface of the chuck 433 is aligned with the slot 423 is provided with a clamping tooth 434, and the clamping tooth 434 is clamped into the chuck 433, so that the wound strap 3 is stabilized inside the storage tube 41. A knob 435 is provided on the upper surface of the chuck 433, which is used to rotate the rotating shaft 43.

[0077] Working principle: When in use, the strap 3 is connected with the tightening component 4 to the frame 1, and then the entire protective goggles are worn on the eyes; when the laser is irradiated on the protective goggles, it will trigger the ITO conductive layer 274 in the liquid crystal tunable filter 27, and the ITO conductive layer 274 will apply different electric fields to the liquid crystal layer 271, thereby changing the direction of the liquid crystal molecules, thereby achieving the purpose of absorbing lasers of different wavelengths. At the same time, the inner anti-fog sheet 26 and the outer protective sheet 25 are both provided with anti-fog structures, which can make the entire protective goggles have a good anti-fog effect.

[0078] In summary, compared with the prior art, the present application integrates various components inside the frame 1 for controlling the protective lens 2. A liquid crystal tunable filter 27 is provided inside the protective lens 2. This liquid crystal tunable filter 27 utilizes the electro-optical effect of liquid crystal. By embedding a liquid crystal layer 271 in the liquid crystal tunable filter 27 and applying different electric fields, the orientation of the liquid crystal molecules can be changed, thereby adjusting the absorption and reflection characteristics of the lens to lasers of different wavelengths. Within a wide field of view, multiple micro-electrode arrays can independently control different areas of the liquid crystal layer 271 to achieve adaptive protection against complex laser environments. When lasers of different wavelengths appear in different directions in the field of view, the liquid crystal molecules in the corresponding areas adjust their states to block the lasers, greatly improving the protective effect of the protective goggles against lasers.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wide-field laser protective goggles, comprising a frame (1) and a protective lens (2), characterized in that: The protective lens (2) is detachably engaged with the inner side of the lens frame (1); the protective lens (2) comprises an outer protective sheet (25), a liquid crystal tunable filter (27) and an inner anti-fog sheet (26) which are arranged in sequence from the outside to the inside; the outer protective sheet (25), the liquid crystal tunable filter (27) and the inner anti-fog sheet (26) are bonded and connected; the lens frame (1) is equipped with an MCU control module, and the liquid crystal tunable filter (27) is electrically connected to the MCU control module.

2. The wide-view laser protective goggles according to claim 1, characterized in that: Connecting buckles (11) are symmetrically arranged on both sides of the frame (1), and baffles (12) are arranged on both sides of the frame (1) along the outer sides of the connecting buckles (11); a power supply unit (13) is arranged on the top of the frame (1), and the power supply unit (13) is used to supply power to the entire frame (1) to maintain the operation of the liquid crystal tunable filter (27), and a charging connector (14) is arranged at the front end of the power supply unit (13); a nose pad (16) is arranged on the bottom of the frame (1), and communication slots (15) are symmetrically arranged inside the frame (1) along both sides of the nose pad (16), and the communication slots (15) are used to be electrically connected to the protective lens (2).

3. The wide-view laser protective goggles according to claim 2, characterized in that: The MCU control module is connected to a power module, a control signal generating module, a temperature control module and a communication interface module; the power module is connected to a power supply unit (13) and is used to provide a stable working voltage to the liquid crystal tunable filter (27); the control signal generating module is used to adjust parameters such as the filter wavelength and bandwidth of the liquid crystal tunable filter (27); the temperature control module is used to maintain a stable working temperature of the liquid crystal tunable filter (27); and the communication interface module is connected to a communication slot (15) and is used to connect the liquid crystal tunable filter (27) to a built-in control system of the frame (1).

4. The wide-view laser protective goggles according to claim 1, characterized in that: The edge of one side of the protective lens (2) facing the inner side of the frame (1) is provided with a frame (21); the top two sides of the protective lens (2) are provided with limit clamps (22) for clamping and connecting with the frame (1); the bottom of the protective lens (2) is provided with a bayonet (24), and the bayonet (24) is used to clamp with the nose pad (16) of the frame (1); the top of the protective lens (2) is provided with a plurality of electrical contacts (23) for electrically connecting with the frame (1); the bottom of the protective lens (2) is provided with an outer protective sheet (25) whose outer surface is coated with a thin film with anti-fog function, and the inner surface of the inner anti-fog sheet (26) is coated with an anti-fog chemical coating, so as to ensure that both the inner and outer surfaces of the protective lens (2) have an anti-fog effect.

5. The wide-view laser protective goggles according to claim 4, characterized in that: The liquid crystal tunable filter (27) comprises a liquid crystal layer (271), and both sides of the liquid crystal layer (271) are provided with a liquid crystal alignment layer (272), a reflective layer (273), an ITO conductive layer (274), a glass substrate (275) and an anti-reflection film (276) in sequence from the inside to the outside; the liquid crystal layer (271) and the liquid crystal alignment layer (272) are used to block laser light; the reflective layer (273) is used to reflect laser light; the ITO conductive layer (274) is used to energize the liquid crystal tunable filter (27); the glass substrate (275) is used to ensure that the liquid crystal tunable filter (27) has a certain strength; and the anti-reflection film (276) is used to reduce the reflection loss of light.

6. The wide-view laser protective goggles according to claim 5, characterized in that: The reflective layer (273) realizes the laser protection function based on the thin film interference principle. For vertically incident light, the calculation formula of the reflectivity R is: Where n0 is the refractive index of the incident medium, n s is the refractive index of the material of the reflective layer (273); by selecting a suitable reflective layer material and thickness, laser light of a specific wavelength can be caused to produce destructive interference, thereby greatly reducing the transmittance of the laser light and achieving protection against the laser light; The anti-reflection film (276) is used to reduce the reflection loss on the surface of the lens and improve the light transmittance of the lens. The thickness d of the anti-reflection film satisfies the formula: Among them, λ is the wavelength of light that needs to be enhanced, and n is the refractive index of the anti-reflection film material; by coating the surface of the lens with a suitable anti-reflection film, the overall light transmittance of the eyepiece can be improved, allowing the wearer to obtain a clearer field of view.

7. A wide-view laser protective goggles according to any one of claims 1 to 6, characterized in that: The invention also comprises a strap (3), wherein the strap (3) is made of leather, and the strap (3) is provided with binding heads (31) at both ends close to the frame (1), and a binding opening (32) is provided in the middle of the binding head (31), and the binding opening (32) is connected to the frame (1); and a connecting portion (33) is provided in the middle of the strap (3).

8. The wide-view laser protective goggles according to claim 7, characterized in that: The invention also comprises a tightening assembly (4), wherein the tightening assembly (4) is connected to the connecting portion (33), and the tightening assembly (4) comprises a storage tube (41), a limiting plate (42) and a rotating shaft (43), wherein the rotating shaft (43) is inserted into the storage tube (41) and is rotationally connected to the storage tube (41), and a limiting plate (42) is provided at the top end of the storage tube (41), and the limiting plate (42) is used for mutual limiting with the top end of the rotating shaft (43), and the binding strap (3) passes through the middle of the rotating shaft (43).

9. The wide-view laser protective goggles according to claim 8, characterized in that: The storage tube (41) is provided with two through holes (411) on the side, and the bottom end and the top end of the inner side of the storage tube (41) are provided with bearings (413). The upper surface of the storage tube (41) is provided with a plurality of slots (412). The bottom of the limiting plate (42) is aligned with the slots (412) and is provided with a plug post (421). The bottom end of the plug post (421) is provided with a reset spring (422), and the plug post (421) is inserted into the slot (412). The upper surface of the limiting plate (42) is provided with a plurality of slots (423), and the middle part of the limiting plate (42) is provided with a sleeve hole (424) for being sleeved on the rotating shaft (43).

10. The wide-view laser protective goggles according to claim 9, characterized in that: A connecting hole (431) is provided in the middle of the rotating shaft (43), and the connecting hole (431) is used for the strap (3) to pass through the middle of the rotating shaft (43); a connecting shaft (432) is provided at the bottom and top of the rotating shaft (43), and the connecting shaft (432) is interference-connected with the bearing (413), and a chuck (433) is provided at the end of the top of the connecting shaft (432) that protrudes out of the storage tube (41), and a position where the bottom surface of the chuck (433) is aligned with the slot (423) is provided with a locking tooth (434), and a knob (435) is provided on the upper surface of the chuck (433) for rotating the rotating shaft (43).

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