• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An optical filter for sunglasses, with a transmittance of less than 20% for light wavelengths from 400 nm to 650 nm, is described. In order to design such an optical filter in such a way that, despite a good UV filter effect, overall improved color perception is achieved and the wear-free wearing of the sunglasses is also possible over a longer period of time, it is proposed that the transmission spectrum (1, 2, 3) in the light wavelength range between 440 nm and 470 nm (4) as well as between 570 nm and 590 nm (8) each have a local transmission maximum (5, 6, 7) or (9, 10, 11) and in the light wavelength range between 600 nm and 620 nm (12) a transmission maximum (13, 14) or a transmission saddle (15), the transmittance below the line connecting the local transmission maximum (5, 6, 7) between 440 nm and 470 nm and the local transmission maximum (9, 10, 11) between 570 nm and 590 nm has a substantially convex overall course (16) with a fluctuation width of less than 8%.
    公开号:AT521171A4
    申请号:T505212018
    申请日:2018-06-25
    公开日:2019-11-15
    发明作者:
    申请人:Silhouette Int Schmied Ag；
    IPC主号:
    专利说明:

    Summary
    An optical filter for sunglasses with a transmittance of less than 20% for light wavelengths from 400 nm to 650 nm is described. In order to design such an optical filter in such a way that, despite a good UV filter effect, overall improved color perception is achieved and fatigue-free wearing of the sunglasses is also possible over a longer period of time, it is proposed that the transmission spectrum (1, 2, 3) be in the light wavelength range between 440 nm and 470 nm (4) and between 570 nm and 590 nm (8) each a local transmission maximum (5, 6, 7) or (9, 10, 11) and in the light wavelength range between 600 nm and 620 nm (12) a local one Transmission maximum (13, 14) or a transmission saddle point (15), the degree of transmission below the connecting line of the local transmission maximum (5, 6, 7) between 440 nm and 470 nm and the local transmission maximum (9, 10, meanwhile 570 nm and 590 nm has an essentially convex overall course (16) with a fluctuation range below 8%.
    (Fig.)
    1/10 (42117) KA
    The invention relates to an optical filter for sunglasses with a transmittance of less than 20% for light wavelengths from 400 nm to 650 nm.
    Optical filters for sunglasses are known from the prior art, which have a transmittance of less than 20% for light wavelengths up to 650 nm, in particular to reduce UV light which is harmful to the human eye and light reflections which impair vision. Since, at such low transmission levels in this light wavelength range, not only is harmful UV light filtered, but other spectral colors are also attenuated, there is the problem that the color perception of the spectacle wearer, in particular the perception of color saturation and color temperature, is restricted as a result. As a result, the hues viewed through the filters are not only perceived as pale, but that when the glasses are worn for a longer period of time, the glasses wearer also experiences fatigue as a result of the increased white balance due to the chromatic adaptation of the eye. Sunglasses with such filters are therefore not suitable to be worn continuously for a long period of time.
    There are also optical filters for sports glasses, in particular for ski goggles, which have an amplification of certain light wavelength ranges to improve visual acuity and thus the reaction behavior, and an attenuation of certain light wavelength ranges to increase contrast. The disadvantage of this, however, is that there are color distortions due to the high fluctuation ranges and the high local rates of change in the transmittance curve,
    2/10 which is why a high chromatic adaptation of the eye is necessary when wearing such sports glasses, which leads to signs of fatigue. Apart from this, such sports glasses filters in the light wavelength range up to 650 nm have transmittances of over 30%, sometimes even over 60% and are therefore not suitable for use in sunglasses which should have a significantly lower transmittance.
    The invention is therefore based on the object of designing an optical filter of the type described in such a way that, despite a good UV filter effect, overall improved color perception is achieved and fatigue-free wearing of the sunglasses is also possible over a longer period of time.
    The invention achieves the object based on an optical filter of the type described in the introduction in that the transmission spectrum in the light wavelength range between 440 nm and 470 nm and between 570 nm and 590 nm each have a local transmission maximum and in the light wavelength range between 600 nm and 620 nm a local one Transmission maximum or a transmission saddle point, wherein the transmittance below the connecting line of the local transmission maximum between 440 nm and 470 nm and the local transmission maximum between 570 nm and 590 nm has a substantially convex overall course with a fluctuation range below 8%.
    It has been shown that the provision of a local transmission maximum between 440 nm and 470 nm and between 570 nm and 590 nm and a local transmission maximum or a transmission saddle point between 600 nm and 620 nm due to the associated higher harmless blue, yellow and as well as orange / red components in the transmission spectrum of the optical filter, a fresher color perception, in particular under daylight conditions, is achieved even at low transmission levels below 20%. An increase in the yellow portion of the transmission spectrum by increasing the transmittance between 570 nm and 590 nm has previously been avoided because
    3/10 this basically leads to a loss of contrast between the red and green parts of the transmission spectrum, which would not only disadvantage people with red-green eyesight, but would also reduce the overall color saturation. In order to avoid this disadvantage, the transmittance of the optical filter according to the invention has an essentially convex overall profile between 470 nm and 570 nm, the transmittance profile in this light wavelength range being below the connecting path of the local transmission maximum in the blue range and in the yellow range of the transmission spectrum. Surprisingly, this has the consequence that the contrast between the red and green components is increased despite a higher yellow component. The fact that the convex overall course of the transmittance between 470 nm and 570 nm has an essentially continuously positive curvature and a fluctuation range of less than 8% means that successive, fluctuating transmittance changes are avoided and thus a more uniform, distortion-free transmission behavior is achieved. As a result, color distortions affecting color perception are significantly reduced and the conditions for better color adaptation are created. The chromatic adaptation of the eyes is facilitated as a result of these features, as a result of which the sunglasses having the filter according to the invention can be worn without fatigue even over longer periods of time. In order to further improve the color rendering or perception, the transmittance up to the local transmission maximum between 440 nm and 470 nm in the blue region can have an essentially continuously increasing, convex overall course. A further local transmission minimum between 625 nm and 655 nm can be provided for an even better contrast behavior, in particular in the case of optical filters according to the invention with gray, green or brown tint.
    In order to achieve an even higher contrast between the red and green components and to further reduce color distortions, it is proposed that the essentially convex overall course of the transmittance below the connecting line of the local transmission maximum between 440 nm and 470 nm and
    4/10 of the local transmission maximum between 570 nm and 590 nm forms exactly one transmission minimum.
    Particularly favorable conditions result in this connection if the local transmission maximum between 440 nm and 470 nm has a transmittance between 5 and 15%, the local transmission minimum between 470 nm and 570 nm a transmittance below 10%, the local transmission maximum between 570 nm and 590 nm have a transmittance between 10 and 15% and between 600 nm and 620 nm the local transmission maximum has a transmittance between 10 and 20% or the transmission saddle point has a transmittance between 5 and 10%. In addition, the optional local transmission minimum between 625 nm and 655 nm can have a transmittance below 10%.
    In order to enable high-quality production of the optical filters according to the invention at high production speed and reproducibility and to adjust their transmission behavior in a particularly favorable manner, the optical filters can be made from a plastic matrix into which between 400 and 700 ppm of a UV filter pigment, between 33 and 98 ppm of a blue pigment, between 75 and 96 ppm of a yellow pigment, between 124 and 174 ppm of a red pigment and between 37 and 115 ppm of a green pigment are dispersed. Inorganic and / or organic pigments can be used. The optical filters can be injection molded from a thermoplastic suitable for optical applications, for example polycarbonate. Accordingly, the pigments are added to the plastic granulate and the melt is homogenized. Particularly favorable manufacturing conditions can be achieved, for example, if premixes are first created, each premix comprising UV filter pigments and pigments of a specific color. The premixes of different colors thus obtained are then mixed in sequence with the plastic granules.
    5.10
    In the drawing, embodiments of the subject matter of the invention are shown, for example, using transmission spectra for optical filters according to the invention, each with a different tint.
    Optical filters according to the invention, each with different tints, have transmission spectra 1, 2 and 3. The transmission spectrum 1 describes, for example, the percentage course of the transmittance T in the light wavelength range from 380 nm to 800 nm of an optical filter according to the invention with brown tint. Accordingly, the transmission spectrum 2 can be assigned to an optical filter according to the invention with a gray tint and the transmission spectrum 3 can be assigned to an optical filter according to the invention with a green tint.
    The transmission spectra 1, 2 and 3 each have a local transmission maximum 5, 6 and 7 in the light wavelength range 4 between 440 nm and 470 nm and a local transmission maximum 9, 10 and 11 each in the light wavelength range 8 between 570 nm and 590 nm. In the light wavelength range 12 between 600 nm and 620 nm, the transmission spectra 1 and 2 also have a local transmission maximum 13 or 14, while the transmission spectrum 3 in the local light wave range 12 includes a transmission saddle point 15.
    As can be clearly seen in the drawing, the degrees of transmission of the transmission spectra 1, 2 and 3 between the transmission maxima 5, 6 and 7 in the light wave range 4 and the transmission maxima 9, 10 and 11 in the light wave range 8 have an essentially convex overall course 16 a fluctuation range below 8%. The convex overall profile 16 of the transmission spectra 1, 2 and 3 forms exactly one transmission minimum 17, 18 and 19 in the light wavelength range between 470 nm and 570 nm.
    According to one embodiment, the transmission spectra 1, 2 and 3 in the light wave range 20 between 625 nm and 655 nm can comprise transmission minima 21, 22 and 23, respectively.
    6.10
    The transmission maximum 5 of the transmission spectrum 1 can be 7-9%, the transmission minimum 17 4-6%, the transmission maximum 9 12-14%, the transmission maximum 13 15-17% and the transmission minimum 21 7-9%.
    The transmission maximum 6 of the transmission spectrum 2 can be 11-13%, the transmission minimum 18 7-9%, the transmission maximum 10 12-14%, the transmission maximum 14 10-12% and the transmission minimum 22 3-5%.
    The transmission maximum 7 of the transmission spectrum 3 can be at 12 -14%, the transmission minimum 19 at 8.5 - 9.5%, the transmission maximum 11 at 11 - 13%, the transmission saddle point 15 at 8 - 9% and the transmission minimum 23 at 4 - 6% lie.
    7.10
    patent attorneys
    Dipl.-Ing. Helmut Hübscher
    Dipl.-Ing. Gerd pretty
    Dipl.-Ing. Karl Winfried Hellmich
    Spittelwiese 4, 4020 Linz (42117) KA
    权利要求:
    Claims (4)
    [1]
    claims
    1. Optical filter for sunglasses, with a transmittance of less than 20% for light wavelengths from 400 nm to 650 nm, characterized in that the transmission spectrum (1,2, 3) in the light wavelength range between 440 nm and 470 nm (4) and between 570 nm and 590 nm (8) each have a local transmission maximum (5, 6, 7) or (9, 10, 11) and in the light wavelength range between 600 nm and 620 nm (12) a local transmission maximum (13, 14) or a transmission saddle point (15), the degree of transmission below the connecting line of the local transmission maximum (5, 6, 7) between 440 nm and 470 nm and the local transmission maximum (9, 10, 11) between 570 nm and 590 nm having a substantially convex overall course ( 16) with a fluctuation range below 8%.
    [2]
    2. Optical filter according to claim 1, characterized in that the substantially convex overall course (16) of the transmittance below the connecting line of the local transmission maximum (5, 6, 7) between 440 nm and 470 nm and the local transmission maximum (9, 10, 11) forms a transmission minimum (17, 18, 19) between 570 nm and 590 nm.
    [3]
    3. Optical filter according to claim 1 or 2, characterized in that the local transmission maximum (5, 6, 7) between 440 nm and 470 nm has a transmittance between 5 and 15%, the local transmission minimum (17, 18, 19) between 470 nm and 570 nm a transmittance below 10%, the local transmission maximum (9, 10, 11) between 570 nm and 590 nm a transmittance between 10 and 15% and between 600 nm and 620 nm
    8/10 local transmission maximum (13, 14) have a transmittance between 10 and 20% or the transmission saddle point (15) has a transmittance between 5 and 10%.
    [4]
    4. Optical filter according to one of claims 1 to 3, characterized by a plastic matrix in which between 400 and 700 ppm of a UV filter pigment, between 33 and 98 ppm of a blue pigment, between 75 and 96 ppm of a yellow pigment, between 124 and 174 ppm of a red pigment and between 37 and 115 ppm of a green pigment.
    9.10
    100-

    10/10
    类似技术:
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    同族专利:
    公开号 | 公开日
    AT521171B1|2019-11-15|
    AU2019296505A1|2020-02-27|
    EP3811147A1|2021-04-28|
    KR20210021937A|2021-03-02|
    CN111194427A|2020-05-22|
    AU2019296505B2|2020-11-12|
    WO2020000006A1|2020-01-02|
    CA3072114A1|2020-01-02|
    US20200285079A1|2020-09-10|
    JP2021529331A|2021-10-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3520346A1|1985-06-07|1986-12-11|Fa. Carl Zeiss, 7920 Heidenheim|AREA OF COLORED CONTACT LENS|
    DE69839286T2|1997-01-28|2009-04-09|Kyowa Hakko Chemical Co., Ltd.|Use of synthetic resin moldings as light filters for display devices|
    EP2946245A1|2013-01-17|2015-11-25|Carl Zeiss Vision Italia S.p.A.|Contrast enhancing filter for eye glasses and contrast enhancing eye glass|
    DE102013106201A1|2013-06-13|2014-12-18|Infitec Gmbh|Filter arrangement for a wavelength division multiplex stereo system and stereo goggles, stereo projector or stereo display of a wavelength division multiplex stereo system|
    DE102015117540A1|2014-10-17|2016-04-21|Hoya Candeo Optronics Corp.|OPTICAL GLASS FILTER|
    US10168553B2|2015-01-19|2019-01-01|Optimeyes4U, Inc.|Ophthalmic spectacle lenses, materials and method|
    CN112630981A|2021-03-08|2021-04-09|宁波圻亿科技有限公司|Wearable device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    AT505212018A|AT521171B1|2018-06-25|2018-06-25|Optical filter for sunglasses|AT505212018A| AT521171B1|2018-06-25|2018-06-25|Optical filter for sunglasses|
    US16/652,462| US20200285079A1|2018-06-25|2019-06-21|Optical filter for sunglasses|
    KR1020207007288A| KR20210021937A|2018-06-25|2019-06-21|Optical filter for sunglasses|
    EP19734659.6A| EP3811147A1|2018-06-25|2019-06-21|Optical filter for sunglasses|
    AU2019296505A| AU2019296505B2|2018-06-25|2019-06-21|Optical filter for sunglasses|
    CA3072114A| CA3072114A1|2018-06-25|2019-06-21|Optical filter for sunglasses|
    JP2020512030A| JP2021529331A|2018-06-25|2019-06-21|Optical filter for sunglasses|
    CN201980004923.5A| CN111194427A|2018-06-25|2019-06-21|Optical filter for sunglasses|
    PCT/AT2019/060206| WO2020000006A1|2018-06-25|2019-06-21|Optical filter for sunglasses|
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