Medical goggle lens and design method thereof

Abstract

The invention discloses a medical goggle lens and a design method thereof, and belongs to the field of goggles, a standard observer response function for three stimulus values is obtained according to corresponding curves x (lambda), y (lambda) and z (lambda) of three cone cells of human eyes to a visible spectrum, the three stimulus values are normalized, the chromaticity is set to be less than 0.1, so that the value range of x, y and z is 0.32-0.34, and the value range of x, y and z is 0.32-0.34. Laser wavelengths needing to be cut off are obtained, transmittance adjustment is carried out on other wavelengths, corresponding x, y and z design values are obtained, film system design of the optical thin film is carried out according to the x, y and z design values, and a corresponding film system is obtained; through the steps, cut-off in a specific wavelength range is achieved, the wavelength of the laser adopted by an operation is cut off, the situation that radiation light of the laser hurts human eyes is prevented, the transmittance is high, the color difference is small, the color of the film layer is close to be colorless, and interference of the color of the lens of the protective glasses to medical staff is reduced.

Description

Technical Field

[0001] The invention relates to the field of optical fibers, and in particular to a medical goggle lens and a design method thereof. Background Art

[0002] Protective glasses lenses are a type of filter lens. Their main function in applications is to isolate certain wavelengths of light, thereby preventing radiation light from causing damage to the eyes, while allowing other wavelengths of light to pass through, thereby increasing the light transmittance of the lens.

[0003] At present, goggles are mainly divided into two categories: one is absorption type and the other is reflection type. Absorption type lenses not only cut off the light of the radiation wavelength, but also absorb other wavelengths of visible light at the same time, resulting in reduced visibility; the current reflection type lenses only cut off the light intensity of the corresponding radiation wavelength, allowing other wavelengths of light to pass through, resulting in the light passing through the lens to present a certain color, that is, the color presented is the color of the transmitted light. Due to the color difference problem, it is easy to cause visual errors for medical staff, affecting the working status of medical staff. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a method for designing a medical goggle lens with high transmittance, small chromatic aberration, and a color of transmitted light close to white light.

[0005] In order to overcome the deficiencies of the prior art, the second object of the present invention is to provide a medical goggle lens with high transmittance, small chromatic aberration and a color of transmitted light close to white light.

[0006] One of the purposes of the present invention is achieved by the following technical solution:

[0007] A method for designing medical goggle lenses comprises the following steps:

[0008] According to the corresponding curves x(λ), y(λ) and z(λ) of the three cone cells of the human eye to the visible spectrum, the standard observer response function for the three stimulus values ​​is obtained. The response function formulas for the three stimulus values ​​are:

[0009]

[0010] Among them, S(λ) is the spectrum of natural light after passing through the goggles; x(λ) is the response curve of the red cone cells of the simulated human eye to the visible spectrum; y(λ) is the response curve of the green cone cells of the simulated human eye to the visible spectrum; z(λ) is the response curve of the blue cone cells of the simulated human eye to the visible spectrum; X is the red stimulus value obtained by the standard observer response function; Y is the green stimulus value obtained by the standard observer response function; Z is the blue stimulus value obtained by the standard observer response function;

[0011] Normalizing the three stimulus values, we get:

[0012]

[0013]

[0014] x is the color coordinate corresponding to red in chromaticity, y is the color coordinate corresponding to green in chromaticity, z is the color coordinate corresponding to blue in chromaticity, and the chromaticity is set to be less than 0.1, so the value range of x, y, and z is 0.32-0.34. The laser wavelength that needs to be cut off is obtained, and the transmittance of other wavelengths is adjusted to obtain the corresponding x, y, and z design values;

[0015] Design the film system of the optical thin film according to the x, y, and z design values ​​to obtain the corresponding film system;

[0016] According to the designed film system, the actual values ​​of x, y, z and the final chromaticity value are obtained.

[0017] Furthermore, the laser wavelength to be cut off is 525-545 nm.

[0018] Furthermore, the film system is a film system formed by alternately stacking multiple layers of high refractive index film layers H and low refractive index film layers L.

[0019] Furthermore, the high refractive index film layer material includes at least one of Ta2O5, Nb2O5, and TiO2.

[0020] Furthermore, the low refractive index film layer material includes at least one of SiO2, Al2O3, and MgF2.

[0021] The second object of the present invention is achieved by adopting the following technical solution:

[0022] A medical goggle lens is manufactured by using any one of the above-mentioned medical goggle lens design methods. The medical goggle lens comprises a substrate having a film system formed by alternately stacking multiple layers of high refractive index film layers H and low refractive index film layers L.

[0023] Furthermore, the substrate is made of silicon dioxide material.

[0024] Furthermore, the high refractive index film layer material includes at least one of Ta2O5, Nb2O5, and TiO2.

[0025] Furthermore, the low refractive index film layer material includes at least one of SiO2, Al2O3, and MgF2.

[0026] Compared with the prior art, the medical goggle lens design method of the present invention obtains the standard observer response function for three stimulus values ​​according to the corresponding curves x(λ), y(λ) and z(λ) of the three cone cells of the human eye to the visible spectrum, normalizes the three stimulus values, sets the chromaticity to be less than 0.1, so the value range of x, y, z is 0.32-0.34, obtains the laser wavelength that needs to be cut off, adjusts the transmittance of other wavelengths, obtains the corresponding x, y, z design values, designs the film system of the optical film according to the x, y, z design values, and obtains the corresponding film system; through the above steps, cutoff is achieved within a specific wavelength range, the laser wavelength used in the operation is cut off, the laser radiation light is prevented from causing damage to the human eye, the transmittance is high, the chromatic aberration is small, the color of the film layer is close to colorless, and the interference of the color of the goggle lens on medical staff is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a standard three-primary color chromatogram;

[0028] Figure 2 It is a schematic diagram comparing the standard three-primary color spectrum and the negative filter of 532nm laser wavelength;

[0029] Figure 3 The three primary color spectrum of the negative filter of 532nm laser wavelength;

[0030] Figure 4 Schematic diagram of the comparison between the standard three-primary color spectrum and the colorless filter of 532nm laser wavelength;

[0031] Figure 5 The three primary color spectrum of the colorless lens with a laser wavelength of 532nm;

[0032] Figure 6 This is a schematic diagram comparing the target curve of the colorless lens with a laser wavelength of 532nm and the actual sample. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] See also Figure 1 The present invention provides a method for designing medical goggles, comprising the following steps:

[0036] According to the corresponding curves x(λ), y(λ) and z(λ) of the three cone cells of the human eye to the visible spectrum, the standard observer response function for the three stimulus values ​​is obtained. The response function formulas for the three stimulus values ​​are:

[0037]

[0038] Among them, S(λ) represents the power spectrum of a certain color light, which can be considered as the spectrum of natural light after passing through the goggles; x(λ) is the response curve of the red cone cells of the simulated human eye to the visible spectrum; y(λ) is the response curve of the green cone cells of the simulated human eye to the visible spectrum; z(λ) is the response curve of the blue cone cells of the simulated human eye to the visible spectrum; X is the red stimulus value obtained by the standard observer response function; Y is the green stimulus value obtained by the standard observer response function; Z is the blue stimulus value obtained by the standard observer response function;

[0039] Normalizing the three stimulus values, we get:

[0040]

[0041] x is the color coordinate corresponding to red in chromaticity, y is the color coordinate corresponding to green in chromaticity, z is the color coordinate corresponding to blue in chromaticity, and the chromaticity is set to be less than 0.1, so the value range of x, y, and z is 0.32-0.34. The laser wavelength that needs to be cut off is obtained, and the transmittance of other wavelengths is adjusted to obtain the corresponding x, y, and z design values;

[0042] Design the film system of the optical thin film according to the x, y, and z design values ​​to obtain the corresponding film system;

[0043] According to the designed film system, the actual values ​​of x, y, z and the final chromaticity value are obtained.

[0044] Specifically, the corresponding curves x(λ), y(λ) and z(λ) of the three types of cone cells for the visible spectrum are as follows: Figure 1 shown.

[0045] The laser wavelength to be cut off is 525-545nm. The film system is a film system formed by alternating multiple layers of high refractive index film layers H and low refractive index film layers L. The high refractive index film layer material includes at least one of Ta2O5, Nb2O5, and TiO2. The low refractive index film layer material includes at least one of SiO2, Al2O3, and MgF2.

[0046] The specific design process for 532nm laser is as follows:

[0047] The wavelength range of the laser is selected to be cut off at 525-545nm, and other wavelengths are transmitted, such as Figure 2 , Figure 2 Target is the negative filter as the spectrum of the goggles, and the three-stimulus color spectrum of the lens transmission spectrum is obtained, such as Figure 3 According to the three-stimulus color spectrum, x=0.34686, y=0.289333, z=1-xy=0.363807 are calculated respectively; by adjusting the transmittance of other wavelengths so that the values ​​of x and y are close to 0.33, a comparison chart of the standard three-primary color comparison lens spectrum transmittance spectrum is obtained, as shown in Figure 4 , Figure 4 Target is the curve when x, y, and z are all target values ​​0.33; and the three-primary color spectrum of the lens, such as Figure 5 , and obtain the corresponding x=0.338719, y=0.323657, z=0.337624. The obtained target spectrum curve is used to optimize the film system, and the corresponding film system can be obtained, as shown in Table 1. By using Ta2O5 and SiO2 as high and low refractive index materials for the processing technology, the refractive index of Ta2O5 near 550nm is 2.22861, and the refractive index of SiO2 near 550nm is 1.47464.

[0048] Table 1

[0049]

[0050]

[0051]

[0052]

[0053]

[0054]

[0055]

[0056]

[0057] According to the designed film system, x=0.337391, y=0.324086, z=0.338523 are obtained, and the final chromaticity value is 0.07.

[0058] The medical protective eyewear lens for 532nm laser provided in this embodiment realizes the cutoff of 532nm laser wavelength channel, chromaticity <0.1, so that the lens appears colorless; hard dielectric coating by sputtering or ion beam assisted deposition is adopted, and the reliability requirements of friction resistance, high temperature and high humidity resistance can be met. Its performance can be seen in Figure 6 Performance diagram of .

[0059] The present application also discloses a medical goggle lens, which is manufactured by the above-mentioned medical goggle lens design method. The medical goggle lens comprises a substrate, and the substrate has a film system formed by alternately stacking multiple high-refractive index film layers H and low-refractive index film layers L. The substrate is made of silicon dioxide material, such as glass materials with high visible light transmittance such as D263T, BK7, and FS.

[0060] The high refractive index film material includes at least one of Ta2O5, Nb2O5, and TiO2. The low refractive index film material includes at least one of SiO2, Al2O3, and MgF2. The protective eyeglass lens has an isolation greater than OD2 at the required cut-off laser wavelength, and a color saturation of the lens under the White environment under the CIE-1931 standard of less than 0.1.

[0061] Compared with the prior art, the medical goggle lens design method of the present invention obtains the standard observer response function for three stimulus values ​​according to the corresponding curves x(λ), y(λ) and z(λ) of the three cone cells of the human eye to the visible spectrum, normalizes the three stimulus values, sets the chromaticity to be less than 0.1, so the value range of x, y, z is 0.32-0.34, obtains the laser wavelength that needs to be cut off, adjusts the transmittance of other wavelengths, obtains the corresponding x, y, z design values, designs the film system of the optical film according to the x, y, z design values, and obtains the corresponding film system; through the above steps, cutoff is achieved within a specific wavelength range, the laser wavelength used in the operation is cut off, the laser radiation light is prevented from causing damage to the human eye, the transmittance is high, the chromatic aberration is small, the color of the film layer is close to colorless, and the interference of the color of the goggle lens on medical staff is reduced.

[0062] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. A method for designing medical goggles, characterized in that: The following steps are involved: According to the corresponding curves x(λ), y(λ) and z(λ) of the three cone cells of the human eye to the visible spectrum, the standard observer response function for the three stimulus values ​​is obtained. The response function formulas for the three stimulus values ​​are: Among them, S(λ) is the spectrum of natural light after passing through the goggles; x(λ) is the response curve of the red cone cells of the simulated human eye to the visible spectrum; y(λ) is the response curve of the green cone cells of the simulated human eye to the visible spectrum; z(λ) is the response curve of the blue cone cells of the simulated human eye to the visible spectrum; X is the red stimulus value obtained by the standard observer response function; Y is the green stimulus value obtained by the standard observer response function; Z is the blue stimulus value obtained by the standard observer response function; Normalizing the three stimulus values, we get: x is the color coordinate corresponding to red in chromaticity, y is the color coordinate corresponding to green in chromaticity, z is the color coordinate corresponding to blue in chromaticity, and the chromaticity is set to be less than 0.1, so the value range of x, y, and z is 0.32-0.

34. The laser wavelength to be cut off is obtained, and the transmittance of other wavelengths is adjusted to obtain the corresponding x, y, and z design values; Design the film system of the optical thin film according to the x, y, and z design values ​​to obtain the corresponding film system; According to the designed film system, the actual values ​​of x, y, z and the final chromaticity value are obtained.

2. The method for designing medical goggles according to claim 1, characterized in that: The laser wavelength that needs to be cut off is 525-545nm.

3. The method for designing medical goggles according to claim 1, characterized in that: The film system is a film system formed by alternately stacking multiple layers of high refractive index film layers H and low refractive index film layers L.

4. The method for designing medical goggles according to claim 3, characterized in that: The high refractive index film layer material includes at least one of Ta2O5, Nb2O5, and TiO2.

5. The method for designing medical goggles according to claim 3, characterized in that: The low refractive index film layer material includes at least one of SiO2, Al2O3, and MgF2.

6. A medical goggle lens manufactured by the medical goggle lens design method according to any one of claims 1 to 5, the medical goggle lens comprising a substrate, characterized in that: The substrate has a film system formed by alternately stacking multiple high-refractive-index film layers H and low-refractive-index film layers L.

7. The medical goggle lens according to claim 6, characterized in that: The substrate is made of silicon dioxide material.

8. The medical goggle lens according to claim 6, characterized in that: The high refractive index film layer material includes at least one of Ta2O5, Nb2O5, and TiO2.

9. The medical goggle lens according to claim 6, characterized in that: The low refractive index film layer material includes at least one of SiO2, Al2O3, and MgF2.

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