WO2001042827A1 - Filtre permettant d'eviter une reaction d'onde cerebrale paroxystique photique - Google Patents

Filtre permettant d'eviter une reaction d'onde cerebrale paroxystique photique Download PDF

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Publication number
WO2001042827A1
WO2001042827A1 PCT/JP2000/008706 JP0008706W WO0142827A1 WO 2001042827 A1 WO2001042827 A1 WO 2001042827A1 JP 0008706 W JP0008706 W JP 0008706W WO 0142827 A1 WO0142827 A1 WO 0142827A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
transmittance
onm
characteristic
wavelength side
Prior art date
Application number
PCT/JP2000/008706
Other languages
English (en)
Japanese (ja)
Inventor
Yukitoshi Takahashi
Shigetoshi Fujiwara
Original Assignee
Japan As Represented By President Of Gifu University
Filtec Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan As Represented By President Of Gifu University, Filtec Inc. filed Critical Japan As Represented By President Of Gifu University
Publication of WO2001042827A1 publication Critical patent/WO2001042827A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/226—Glass filters
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
    • G02C7/104—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having spectral characteristics for purposes other than sun-protection

Definitions

  • the present invention relates to a funtor that suppresses the amount of transmitted light of a specific wavelength to prevent a sudden photoencephalogram response.
  • the purpose of the present invention is to find out what kind of light causes the light spontaneous electroencephalogram response, and to determine the transmission characteristics as a filter necessary to prevent the light spontaneous electroencephalogram reaction based on the results.
  • the most fundamental problem to be solved by the present invention is to propose a technology for practical use of a filter having the transmission characteristics. Disclosure of the invention
  • a photo-sudden electroencephalogram reaction prevention filter according to claim 1 of the present invention is provided.
  • the filter is at least at wavelengths longer than 60 Onm, and the wavelength at which the transmittance becomes 20 ° / 0 in the transmittance attenuation curve formed toward the longer wavelength side is in the range of 61 to 68 Onm. It is characterized by having both a certain characteristic and a characteristic of suppressing the average transmittance from 400 to 70 Onm by 65 to 20%.
  • Claim 2 is that at least the wavelength at which the transmittance becomes 20% in the transmittance attenuation curve formed toward the longer wavelength side on the longer wavelength side than 60 Onm is 610 to 68 Onm.
  • the characteristics are in the range of 400-70 Onm and the average transmittance is 60-20. / 3 , characterized in that the transmittance is at least 20% in the transmittance attenuation curve formed toward the long wavelength side at wavelengths longer than 60 Onm.
  • the wavelength at which the transmittance is 20%, the power is in the range of 6 10 to 6 75 nm, and the average transmittance at 400 to 70 Onm is 5 5 It is characterized by having a characteristic of suppressing it by up to 20%.
  • claim 6 relates to a photo-sudden electroencephalogram reaction prevention filter, characterized in that Cu ion is essential as a coloring component and at least one of Nd ion, Fe ion, Co ion and Mn ion is included. is there. Claim 7 is characterized in that Cu ions and Nd ions are contained as essential coloring components.
  • Figure 1 is a spectral transmittance curves of the light-absorbing filter CF 1 c
  • FIG. 2 is a spectral transmittance curve diagram of the light absorption type filter CF2.
  • FIG. 3 is a spectral transmittance curve diagram of the light absorption type filter CF3.
  • FIG. 4 is a spectral transmittance curve diagram of the light absorption type filter CF4.
  • FIG. 5 is a spectral transmittance curve diagram of the light absorption filter CF5.
  • FIG. 6 is a spectral transmittance curve diagram of the light absorption type filter CF6.
  • FIG. 7 is a diagram of a reflection filter-TF1 spectral transmittance curve of a multilayer film.
  • FIG. 8 is a spectral transmittance curve diagram of a multilayer filter of a reflection type filter TF2.
  • FIG. 9 is a spectral transmittance curve diagram of a combination of the filter type CF1 and TF1.
  • Figure 1 0 is a spectral transmittance curve chart when combining filter one CF 2 and TF 1 c
  • Figure 1 1 is a spectral transmittance curve diagram of combining the filter one of CF 4 and TF 1 c
  • FIG. 12 is a spectral transmittance curve diagram when the filters CF 1 and TF 2 are combined.
  • FIG. 13 is a spectral transmittance curve diagram when filters CF 2 and TF 2 are combined.
  • FIG. 14 is a spectral transmittance curve diagram when filters CF3 and TF2 are combined.
  • FIG. 15 is a spectral transmittance curve diagram when the filters CF 4 and TF 2 are combined.
  • Figure 1 6 is a spectral transmittance curve chart when combining filter CF 3 and CF 6 c
  • FIG. 17 is a spectral transmittance curve diagram when filters CF4 and CF6 are combined.
  • FIG. 18 shows the correlation between AXBZ100 in Table 1 and the prevention rate of the photo-spontaneous electroencephalogram response.
  • the present inventors have determined whether the intensity of visible light affects the appearance of the photo-spontaneous electroencephalogram response (light-intensity dependence), and whether there is a specific wavelength range in which the photo-spontaneous electroencephalogram response occurs.
  • Optical filters with various characteristics (wavelength dependence) were manufactured, and these were used alone or in combination to conduct detailed clinical tests.
  • CF 1 with an average transmission of 75 ° / .
  • Figure 1 and 50% CF 2 Figure 2 alone
  • the prevention effect was recognized in any case compared to the case of the naked eye (100%), there was no difference between CF1 and CF2, and the prevention effect was improved in about 33% of the test subjects. Only recognized (see
  • CF 1 and CF 2 are absorption type filters (ND) with the characteristic of neutral density, to which Fe ions, Co ions, etc. are added as coloring components, as shown in Figs. 1 and 2, respectively.
  • the average transmittance at 400 to 70 Onm is 75% and 50% as follows:
  • CF3 and CF4 are both absorption filters with Nd ions added as coloring components, as shown in Figs. 3 and 4, respectively. As described above, it has a spectral transmittance characteristic of selectively transmitting only BGR.
  • Each of TF 1 and TF 2 is a multilayer filter and has a characteristic of shielding a wavelength band around 70 Onm as shown in FIGS.
  • Table 1 shows the difference in the prevention rate of the photo-spontaneous electroencephalogram response based on the combination of the filters:
  • a filter that shields around 70 Onm used in the test up to that time that is, a filter that blocks visible light in a long wavelength region is realized by a multilayer film.
  • the light coming out of the display device such as a CRT (TV) as an image is adjusted by the filter to light that does not induce a light sudden EEG response.
  • this filter will leave that light as it is. Because of the reflection, people watching the CRT (TV) will see the light. Light sources that emit undesired light are consciously avoided and not seen, but light reflected and reflected on the front of the CRT (TV) that you are actively watching cannot be avoided:
  • CF 5 and CF 6 that utilize the light absorption of Cu (+2) ions have a certain strength, as shown in Figs. 5 and 6, respectively. It is clearly different from a reflection type filter using a multilayer film. This is a characteristic in which the transmittance attenuates gradually from around 520 ⁇ m to 78 Onm, and transmits light to some extent even at 650 to 750 nm. It was thought that the suppression effect could not be expected so much.
  • the present inventors examined the effect of suppressing the photo-spontaneous electroencephalogram reaction by using the Cu ion-added filter (CF5) alone to make sure that the effect was higher than that of the multilayer filter. It is.
  • the present inventors examined how much the suppression effect of the light sudden electroencephalogram reaction changes by replacing CF 6 as the filter of (2) and superimposing with the filter of (1). As a result, the comparison of CF3 + TF2 and CF3 + CF6 in Table 1; or the comparison of CF4 + TF2 and CF4 + CF6, the absorption type filter (CF6) with Cu ion addition was also found. Thus, the suppression effect was quite close to that of a multilayer filter (TF2) that sharply shields wavelengths longer than 65 Onm. This is another important point of the present invention.
  • TF2 multilayer filter
  • the present inventors have conducted studies based on the above experimental results to determine the transmission characteristics required to prevent the occurrence of the photo-sudden electroencephalographic response. As a result, the following two values were found to be particularly effective in determining the transmission characteristics of the filter.
  • One is an average transmittance from 400 to 700 nm; the other is a wavelength longer than 600 nm, at which the transmittance becomes 20% in a transmittance attenuation curve formed toward the longer wavelength side. It is.
  • the average transmittance of 400 to 70 Onm is 65 ° / 0 or less, and it is desirable that the average transmittance be lower, but if it is less than 20%, it will be too high. Therefore, the average transmittance of 400 to 70 Onm is judged to be suitable between 65 and 20%, because it may cause eyestrain.
  • the wavelength at which the transmittance becomes 20% in the transmittance attenuation curve formed toward the longer wavelength side has a sudden burst of light with a transmission characteristic that is closer to the longer wavelength side than 68 Onm. Since the EEG response cannot be suppressed, a shorter wavelength is desirable, but it should be shorter than 615 nm.
  • the wavelength range suitable for the present invention is limited to 615 to 68 Onm.
  • the value obtained by multiplying the value of the average transmittance (B) by 100 is divided by 100, and only the upper two digits are taken as the effective figure.
  • ⁇ indicates the combination of filters using TF2 (No. 8 to 11 in Table 1)
  • # indicates the combination of filters with TF2 changed to CF6 (Table 1).
  • ⁇ indicates the case of the combination of filters using TF1 (No. 5 to 7 in Table 1).
  • FIG. 18 clearly shows the magnitude of the synergistic effect of A and B, and the magnitude of the effect of the above-mentioned 20% transmission wavelength.
  • the optical sudden electroencephalogram reaction prevention filter according to the present invention has at least a wavelength at which the transmittance becomes 20% in the transmittance attenuation curve formed on the longer wavelength side than 60 Onm toward the longer wavelength side. It is characterized by having both a characteristic in the range of 10 to 68 Onm and a characteristic of suppressing the average transmittance from 400 to 700 nm by 65 to 20%. These two optical characteristics are limited irrespective of the composition of the filter material and the like in embodying the present invention.
  • FIGS. 1 to 6 show the spectral transmittance curves of the light absorbing filters CF 1 to CF 6 respectively;
  • FIGS. 7 and 8 show the spectral transmittance curves of the multilayer filters TF 1 and TF 2 respectively.
  • Is shown. 9 to 17 show spectral transmittance curves when the above filters are combined, and the combinations are as shown in Table 1. Further, in FIG.
  • the present inventors have studied visibility and mass productivity for practical use of the present invention.
  • the entire color becomes slightly bluish when viewed through a filter in order to suppress the transmittance particularly in the R wavelength band of the BGR.
  • the present inventors have studied to improve the filter characteristics so that the optical spontaneous electroencephalogram reaction can be suppressed and an image or the like can be visually recognized in a state closer to a natural color.
  • the present inventors have studied various element technologies from various angles and devised the following mass production technologies. These mass production technologies can be applied not only to small products such as glasses, but also to low-cost large display devices.
  • the optical spontaneous electroencephalogram reaction prevention filter according to the present invention is capable of controlling the optical spontaneous electroencephalogram reaction such as a display device using a CRT, a liquid crystal, a plasma, an EL, an LED, etc. It can be applied as a structure directly coated on a potential trigger object; or as a retrofit structure.
  • Example 1 The transmission characteristic of FIG. 15 formed by superposing the absorption type filter CF 4 having the transmission characteristic of FIG. 4 and the reflection type filter TF 2 of the multilayer film having the transmission characteristic of FIG. That is, on the longer wavelength side than 60 Onm, the wavelength at which the transmittance becomes 20% in the transmittance attenuation curve formed toward the longer wavelength side is 625 nm, and the average transmittance from 400 to 700 nm is 25 ° / o.
  • the filter having the transmission characteristics based on the present invention as shown in No. 11 of Table 1, An extremely high prevention rate of 94 ° / 0 was confirmed.
  • Example 2 The transmission characteristics of FIG. 16 formed by superimposing the absorption type filter CF3 having the transmission characteristics of FIG. 3 and the absorption type filter CF6 of the transmission characteristics of FIG. 6; On the longer wavelength side than 60 Onm, the wavelength at which the transmittance becomes 20% in the attenuation curve formed toward the longer wavelength side is 634 nm, and the average transmittance from 400 to 70 Onm is 33%.
  • the present invention has been made to relieve a photosensitized person having a photo-spontaneous electroencephalogram reaction from such anxiety, and to observe a CRT (TV) or other image through a filter according to the present invention.
  • the danger of electroencephalographic reactions can be avoided.
  • the present invention will play a major role in removing a kind of social unrest about the image culture represented by the Pokemon uproar.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Health & Medical Sciences (AREA)
  • Optical Filters (AREA)

Abstract

Cette invention a trait à un filtre permettant d'éviter que des enfants ne subissent une réaction d'onde cérébrale paroxystique photique et ce, même si la stimulation photique est faible, par exemple lorsqu'ils regardent la télévision (tube cathodique) et, partant, ne soient l'objet d'une attaque du type photosensible. Ce filtre se caractérise par le fait que la transmittance montrée par la courbe d'atténuation dessinée vers le côté grande longueur d'onde dans une plage se situant au-dessus de 600 nm décroît jusqu'à 20 % dans une plage comprise entre 610 et 680 nm et par le fait que la transmittance moyenne se situant au-dessus d'une plage comprise entre 400 et 700 nm est éliminée selon un ordre de 65 à 50 %. On obtient ces propriétés en colorant le verre ou la résine du filtre selon l'invention et ce, en ajoutant un colorant renfermant principalement des ions Cu et au moins une sorte d'ions issus du groupe constitué par des ions Nd, Fe, Co et Mn, ce qui permet d'obtenir un filtre du type à absorption, lequel est préférable pour un tube cathodique (télévision), par exemple.
PCT/JP2000/008706 1999-12-08 2000-12-08 Filtre permettant d'eviter une reaction d'onde cerebrale paroxystique photique WO2001042827A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP34882699A JP2001166130A (ja) 1999-12-08 1999-12-08 光突発脳波反応防止フィルター
JP11/348826 1999-12-08

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WO2001042827A1 true WO2001042827A1 (fr) 2001-06-14

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06324213A (ja) * 1993-04-28 1994-11-25 Kureha Chem Ind Co Ltd 複合光学フィルター
JPH09211220A (ja) * 1996-01-30 1997-08-15 Kureha Chem Ind Co Ltd 熱線吸収性複合体
JPH11302308A (ja) * 1998-02-20 1999-11-02 Mitsubishi Rayon Co Ltd 銅化合物含有樹脂組成物の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06324213A (ja) * 1993-04-28 1994-11-25 Kureha Chem Ind Co Ltd 複合光学フィルター
JPH09211220A (ja) * 1996-01-30 1997-08-15 Kureha Chem Ind Co Ltd 熱線吸収性複合体
JPH11302308A (ja) * 1998-02-20 1999-11-02 Mitsubishi Rayon Co Ltd 銅化合物含有樹脂組成物の製造方法

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