JP6646031B2 - Color vision correction filter and color vision correction glasses - Google Patents

Description

  The present invention relates to a color vision correction filter that assists a person with color vision deficiency in determining a color, and to color vision correction glasses including a pair of left and right color vision correction filters.

  Conventionally, in order to correct the color vision of a person with color vision deficiency, color vision correction glasses provided with a color vision transmittance curve whose transmittance varies for each wavelength of light are known (for example, Patent Document 1).

The color vision correction filter of Patent Literature 1 has a color vision abnormality because a person with abnormal color vision has too high sensitivity to light of a specific wavelength as compared to a person with normal color vision than the sensitivity to light of another wavelength. It is based on the theory that color vision can be corrected by using a color vision correction filter that suppresses light transmittance.
For example, a color vision deficient person having a strong color vision characteristic with high sensitivity to green is used to correct the color vision by using a color vision correction filter provided with a transmittance curve that suppresses the transmittance of green light. According to this theory, so-called red-green color blinders have A type, which is more sensitive to green than other colors, and B type, which is more sensitive to green and blue than other colors. Conventionally, a color-vision-impaired person uses a color-vision correction filter that suppresses the transmittance of green light as shown in FIG. 3, and a B-type color-impaired person sees green and blue as shown in FIG. 4. A color vision correction filter that suppresses the transmittance of the light is used.

  However, the color vision correction filter according to Patent Literature 1 improves color discrimination ability by suppressing light strongly felt by a color vision impaired person, but reduces the amount of light that enters the eyes as a whole. There is a problem that it is difficult to use in a dark place, such as driving a car, and that much of the light that strikes the back surface of the filter is reflected without passing through the filter.

  Therefore, the present inventor, when suppressing the transmittance of the green light region in the transmittance curve, by increasing the transmittance of the region on both sides of the green light region has been reduced transmittance accordingly, as a whole Consider increasing the amount of light passing through the filter.

JP-A-6-18819

However, when the transmittance in the region on both sides of the green light region is increased, it has been found that some of the color vision impaired persons are too dazzling, and conversely, the color vision correction filter cannot be used in a bright place.
The present invention has been made in view of the above problems, and has as its object to provide a color vision correction filter that can be used in a bright place and a dark place, and color vision correction glasses.

A first invention made to solve the above-mentioned problem is a color vision correction filter for correcting color vision of a color vision impaired person, wherein the transmittance of blue light having a wavelength of 470 nm is 30% or more and 80% or less, The transmittance in the green light region having a wavelength of 500 nm or more and 550 nm or less is 30% or more and 6% or more.
0% or less, and the minimum transmittance in a region having a wavelength of 450 nm or more and 600 nm or less is provided in the green light region, and the transmittance of yellow light having a wavelength of 560 nm is 80%.
As described above, the transmittance of red light having a wavelength of 600 nm is 90% or more.

According to the inventor's intense study, even if the color-vision correction filter increases the transmittance on the red side, a person with abnormal color vision does not feel so dazzling. It turned out to be dazzling. That is, in the color vision correction filter according to the present invention, the transmittance of blue light having a wavelength of 470 nm is suppressed to 80% or less, so that the user can be prevented from feeling dazzling. Further, since the transmittance of yellow light having a wavelength of 560 nm is set to 80% or more and the transmittance of red light having a wavelength of 600 nm is set to 90% or more, the amount of light passing through the entire filter is increased. The person can sufficiently perform color vision correction even in a dark place.
Furthermore, the color vision correction filter of the present invention, by increasing the transmittance of red light, even if the transmittance of green light is increased, the difference between the transmittance of green light and red light can be sufficiently ensured, The light transmittance is increased from 30%, which is higher than that of the conventional product, to 60% or more. As a result, even in the range of green light, the amount of light passing through the filter is increased as compared with the conventional product, enabling use in a darker place.Also, the green color seen through the color vision correction filter of the present invention is seen with the naked eye. The appearance of a color different from the color can be suppressed.

In the color vision correction filter according to the first aspect of the invention (hereinafter referred to as "A type" color vision correction filter), a difference between a maximum transmittance and a minimum transmittance in a green light region of 500 nm or more and 550 nm or less is within 10%. It is characterized by.
The A-type color-blind person can discriminate a green color included in a wavelength region of 500 nm to 550 nm even if the color is slightly different. However, if the transmittance curve in this wavelength region is greatly inclined, the ratio of the transmittance between adjacent green colors will be different from that for the naked eye, and the subtle green difference that can be discerned by the naked eye will cause the filter There is a possibility that it will not be possible to use it. By keeping the difference between the maximum value and the minimum value of the transmittance of light of 500 nm to 550 nm within 10%, the transmittance curve in the wavelength region becomes substantially horizontal, and when a B-type color vision impaired person uses, It is possible to prevent the subtle green color included in this wavelength region from being indistinguishable.

The color vision correction filter according to the second invention of the present application (hereinafter referred to as a “B type” color vision correction filter) is a color vision correction filter that corrects the color vision of a person with color vision deficiency and has a transmittance of blue light having a wavelength of 470 nm. 30% or more and 80% or less, the transmittance in the green light region having a wavelength of 520 nm or more and 550 nm or less is provided in a range of 30% or more and 60% or less, and the transmittance of yellow light having a wavelength of 560 nm is 80% or more. The transmittance of red light having a wavelength of 600 nm is 90% or more, and in the type B color vision correction filter, the difference between the maximum transmittance and the minimum transmittance in a region having a wavelength of 520 nm to 550 nm is within 10%. It is characterized by the following.
The B-type color-blind person can discriminate a green color included in the wavelength range of 520 nm to 550 nm even if the color is slightly different. However, if the transmittance curve in this wavelength region has a large slope, the transmittance ratio between adjacent green colors will be different from that for the naked eye, so that the subtle distinction of green that can be distinguished by the naked eye will be filtered. There is a possibility that the use of the refrigeration system becomes impossible. By keeping the difference between the maximum value and the minimum value of the transmittance of light of 520 nm to 550 nm within 10%, the transmittance curve in the wavelength region becomes substantially horizontal, and when a B-type color-blind person uses the color-blind person, It is possible to prevent the subtle green color included in this wavelength region from being indistinguishable. The present invention includes color vision correction glasses including the color vision correction filter according to the first invention and a pair of left and right color vision correction filters.

  ADVANTAGE OF THE INVENTION According to the color vision correction filter set and the color vision correction glasses of the present invention, a person with red-green color deficiency can sufficiently perform color vision correction in a bright place or a dark place.

3 is a schematic transmittance curve of an A-type color vision correction filter according to the first embodiment of the present invention. 9 is a schematic transmittance curve of a B-type color vision correction filter according to a second embodiment of the present invention. It is a typical transmittance curve of the conventional A type. It is a typical transmittance | permeability curve of the conventional B type.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
Regarding the color vision correction filter of the present invention, in any embodiment, a method of forming a multilayer film on a substrate surface of glass or resin by a vacuum deposition method, a method of attaching a multilayer film to the substrate, Although a known production method such as a method of mixing a pigment or the like can be appropriately selected, a method of attaching a multilayer film to a base material is preferable for accurately setting a target transmittance curve on a filter.
The present invention is not limited to the following embodiments.
(1st Embodiment)
FIG. 1 is a transmittance curve schematically showing the transmittance of light passing through an A-type color vision correction filter 100 (not shown) for each wavelength according to the first embodiment of the present invention.

  The A-type color vision correction filter 100 is intended for A-type color vision impaired persons, whose sensitivity to green is relatively stronger than sensitivity to other colors, among red-green color impaired persons, and in the visible light wavelength region. Among them, a transmittance curve in which the transmittance of light in a green region located substantially in the center is suppressed is given. FIG. 1 shows the transmittance curves of eight types of color vision correction filters 100 (101 to 108) that are selectively used depending on the degree of abnormality among the type A color vision abnormalities. The color vision correction filter 101 is used for a person with the least abnormal color vision, and the color vision correction filter 108 is used for a person with the most abnormal color vision.

  As shown in FIG. 1, each of the transmittance curves of the color vision correction filter 100 has a minimum transmittance at a wavelength of 450 nm to 600 nm in a green light region having a wavelength of 500 nm or more and 550 nm or less. This corrects the A-type color vision with strong green sensitivity.

  The transmittance curve of the color vision correction filter 100 is provided such that the transmittance of blue light having a wavelength of 470 nm is 30% or more and 80% or less. By setting the transmittance of blue light having a wavelength of 470 nm to be equal to or less than 80%, it is possible to prevent a person with abnormal color vision using the filter 100 from feeling dazzling. By setting the transmittance to 80% or less over the entire wavelength range of 450 nm to 490 nm, glare can be more effectively suppressed.

(Please check the underlined part.)
The transmittance curve of the color vision correction filter 100 is set so that the transmittance of blue light having a wavelength of 470 nm is 30% or more. By doing so, the hue of blue can be suppressed from being impaired as compared with the case of the naked eye. Actually, since the transmittance curve of the color vision correction filter 100 is intended for a color-blind person having a strong sensitivity to green, it is not necessary to greatly suppress blue light. It is provided at 45% or more.
In the A-type color vision correction filter 100, it is preferable that the difference between the maximum value and the minimum value of the transmittance in a blue region of 450 nm or more and 490 nm or less be within 10%. That is, by maintaining the transmittance in the blue region so as not to decrease to near the boundary with the green region, it is possible to increase the amount of light transmitted through the filter even in the blue region.

The type A color vision correction filter 100 has a transmittance of 30% or more for green light having a wavelength of 500 nm or more and 550 nm or less. As will be described later, the color vision correction filter 100 increases the transmittance in the yellow to red light region, so that the difference between the transmittance of yellow light and the transmittance of red light can be reduced even if the transmittance of green light is not less than 30%. Can be provided sufficiently. The A type color vision correction filter 100 is provided with a transmittance of 60% or less for green light having a wavelength of 500 nm or more and 550 nm or less. This is because an abnormal person may not be able to sufficiently distinguish between green and red.
Further, the difference between the maximum transmittance and the minimum transmittance in the green light region having a wavelength of 500 nm or more and 550 nm or less is set to 10% or less (0% in FIG. 1). In this way, it is possible to prevent the ability of the A-type color-blind person to originally discriminate the subtle difference in green color in this region from being impaired.

  In addition, the color vision correction filter 100 has a transmittance of yellow light having a wavelength of 560 nm of 80% or more and a transmittance of red light having a wavelength of 600 nm of 90% or more. By doing so, it is possible to secure the amount of light that enters the eyes of the color-blind person and prevent the visibility from becoming dark.

(2nd Embodiment)
FIG. 2 is a transmittance curve schematically showing the transmittance of light passing through a B-type color vision correction filter 200 (not shown) for each wavelength according to the second embodiment of the present invention.

The B-type color vision correction filter 200 is intended for a B-type color vision impaired person whose sensitivity to blue is relatively stronger than the sensitivity to other colors among red-green color vision impaired persons. In the wavelength region of light, a transmittance curve in which the transmittance of light in the blue region and the green region is suppressed is given. FIG. 2 shows transmittance curves of eight types of color vision correction filters 200 (201 to 208) that can be selectively used depending on the degree of abnormality among the B type color vision impaired persons. The color vision correction filter 201 is used for a person with the least abnormal color vision, and the color vision correction filter 208 is used for a person with the most abnormal color vision.
In the transmittance curves of the A-type color vision correction filter 100 and the B-type color vision correction filter 200, portions having similar characteristics are partially omitted.

  As shown in FIG. 2, the transmittance curve of the color vision correction filter 200 is a transmittance curve in which transmittance is suppressed in a blue region having a wavelength of 450 nm or more and less than 520 nm, and a blue region and a green light region having a wavelength of 520 nm or more and less than 550 nm. have. Among the B-type color vision correction filters 200, the filters 201 to 206 for color vision impaired persons with a light abnormality are provided so that the transmittance in the blue region is higher than the transmittance in the green light region, and the color vision abnormality with a high degree of abnormality is provided. The filters 207 and 208 for the users are provided such that the transmittance in the blue region is lower than the transmittance in the green light region.

  The transmittance curve of the color vision correction filter 200 is provided such that the transmittance in a blue region having a wavelength of 450 nm or more and 490 nm is 60% or less. Also in the color vision correction filter 200, since the transmittance of blue light having a wavelength of 470 nm is set to 80% or less, it is possible to suppress a person with abnormal color vision from feeling dazzling.

In addition, the transmittance curve of the color vision correction filter 200, similarly to the color vision correction filter 100, sets the transmittance of blue light having a wavelength of 470 nm to 30% or more, and suppresses the loss of blue tint.
Actually, the transmittance curve of the color vision correction filter 200 is designed for a color vision impaired person who has strong sensitivity to blue, and it is necessary to suppress blue light. Is provided at 60% or less.
In addition, in the B-type color vision correction filter 200, similarly to the A type color vision correction filter 100, in order to secure the amount of light transmitted in the blue region, the maximum value and the minimum value of the transmittance in the blue region of 450 nm or more and 490 nm or less. Is provided within 10%.

  In the B-type color vision correction filter 200, the transmittance of green light having a wavelength of 520 nm to 550 nm is set to 30% or more. This is because, similarly to the A-type color vision correction filter 100, by increasing the transmittance in the yellow to red light region, the transmittance of yellow light and red light can be reduced even if the transmittance of green light is not less than 30%. This is because it is possible to provide a sufficient difference in the rates.

Further, in the example of FIG. 2, the transmittance of green light having a wavelength of 520 nm to 550 nm is provided at 34%, but this can be changed as appropriate within the range of 30% to 60%. .
Here, if the transmittance in this range exceeds 60%, there is a possibility that a B-type color-impaired person cannot sufficiently distinguish between green and red.
Further, the color vision correction filter 200 is provided such that the difference between the maximum transmittance and the minimum transmittance in a green light region having a wavelength of 520 nm or more and 550 nm or less is 10% or less (0% in FIG. 2). By doing so, it is possible to suppress the impairment of the ability of the B-type color vision impaired person to originally determine the subtle difference in green color in this region.

  In the type A color vision correction filter 100, the transmittance changes at a position where the wavelength is 500 nm from the blue region to the green light region, whereas in the type B color vision correction filter 200, the transmittance varies from the blue region to the green light region. Is changed so that the transmittance changes at a position of 520 nm. That is, as a result of the inventor's intensive study, by adjusting the difference in transmittance between the region of 500 nm or more and less than 520 nm and the region of 520 nm or more and 550 nm or less, color vision deficiency of the B type is more effectively achieved. Correction can be made.

  In the color vision correction filter 200 as well, the transmittance of yellow light having a wavelength of 560 nm is set to 80% or more, and the transmittance of red light having a wavelength of 600 nm is set to 90% or more, so that the color vision deficient eyes can be seen. The amount of light is secured to prevent the visibility from becoming dark.

  Although not shown, the present invention includes color vision correction glasses provided with a pair of left and right color vision correction filters 100 or 200.

As described above, the color vision correction filter of the present invention is not limited to the above-described embodiment. For example, in the color vision correction filter for the A type, the maximum transmittance and the minimum transmittance in the green light region including 500 nm or more and 550 nm or less are used. The difference may not be within 10%, and the difference between the maximum value and the minimum value of the transmittance in the blue region of 450 nm to 490 nm may not be within 10%.
Similarly, in the B type color vision correction film, the difference between the maximum transmittance and the minimum transmittance in the green light region of 520 nm or more and 550 nm or less need not be within 10%, and the transmittance in the blue region of 450 nm or more and 490 nm or less. The difference between the maximum value and the minimum value of may not be within 10%.

Color vision correction filters 100 (101 to 108), 200 (201 to 208) (not shown)

Claims (3)

A color vision correction filter that corrects the color vision of a color blind person,
The transmittance of blue light having a wavelength of 470 nm is 30% or more and 80% or less;
A green light region having a wavelength of 500 nm or more and 550 nm or less is provided with a transmittance of 30% or more and 60% or less, and a minimum transmittance of a wavelength region of 450 nm or more and 600 nm or less is provided in the green light region,
Wavelength is the transmittance of yellow light is 80% or more is 560 nm, Ri der red light transmittance wavelength is 600nm is 90% or more,
A color vision correction filter, wherein a difference between a maximum transmittance and a minimum transmittance in a green light region of 500 nm or more and 550 nm or less is within 10%.   A color vision correction filter for correcting the color vision of a color blind person,
  The transmittance of blue light having a wavelength of 470 nm is 30% or more and 80% or less;
  A green light region having a wavelength of 520 nm or more and 550 nm or less is provided with a transmittance of 30% or more and 60% or less;
  The transmittance of yellow light having a wavelength of 560 nm is 80% or more;
  A color vision correction filter, wherein the transmittance of red light having a wavelength of 600 nm is 90% or more, and the difference between the maximum transmittance and the minimum transmittance in a green light region of 520 nm to 550 nm is within 10%. .   Color vision correction glasses comprising a pair of left and right color vision correction filters according to claim 1 or 2.

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