JPH0238923B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a pink-colored antireflection coating that is applied to optical members, particularly eyeglass lenses, to produce pink-toned fashion-tinted eyeglass lenses. b. Prior art and its problems Conventional fashion-tinted eyeglass lenses used a colored base material, but there was a problem in that the density was not uniform depending on the thickness of the lens. Therefore, in recent years, coloring by coating has been developed. However, pink coloring due to coating,
As a coloring agent, only a mixture mainly composed of gold is commercially available, and there is no single-component material. In general, it is difficult to maintain the composition of mixtures, so in this sense, a method of obtaining the desired coloring as a result of a combination of single-component layers of single-component materials is more preferable in terms of coating material management and product stability. c Purpose In view of the above points, the present invention produces a pink color by using two types of single-component layers made of two types of single-component materials, and further has anti-reflection properties, and has anti-reflection properties on the front and back sides. The purpose of the present invention is to provide a multilayer pink colored antireflection coating, including matching. d.Structure of the Invention The present invention is a pink colored antireflection film characterized in that gold and ferric oxide or manganese are used as colorants for coloring an optical member. The present invention uses gold and ferric oxide as the colorants in the above-mentioned pink colored antireflection film, and has a film structure in which the transparent low refractive index layer is L and the transparent high refractive index layer is H.
When (air/L/Au/L/Fe ₂ O ₃ /L/
H/L/Fe ₂ O ₃ /L/Au/L/H/L/H/glass), and the ratio of the total thickness of the gold layer to the total thickness of the ferric oxide layer was 1:0.900, and the gold Total layer thickness from 0 to
A feature is that the concentration can be arbitrarily changed by changing the wavelength to 21.28 nm. Further, in the present invention, in the pink colored antireflection film, gold and manganese are used as colorants, and the film structure is as follows: (air/L /Au/L/Mn/L/H/L/
Mn/L/Au/L/H/L/H/glass), and the ratio of the total thickness of the gold layer to the total thickness of the manganese layer is 1:
0.694, and the concentration can be arbitrarily changed by changing the total thickness of the gold layer from 0 to 21.28 nm. e Examples Examples of the membrane structure of the present invention will be described below. The refractive index of the transparent low refractive index layer is e.g. _MgF2 n _L
= 1.38, for example, the refractive index of the transparent high refractive index layer is
n _H of the material whose main component is Ta ₂ O ₅ = 2.051,
The refractive index of the base glass is, for example, BasF5, n _S = 1.60, and the colorants are gold (refractive index n _A = 0.940, absorption coefficient K _A = 0.323) and ferric oxide (refractive index n _F =
1.827, absorption coefficient K _F =0.059), and the film thickness ratio is 1:
Table 1 shows the composition of the pink colored antireflection film when used as 0.900.

【table】

[Table] In addition, (a) in Table 1 is the transmittance at a wavelength of 500 nm.
92.66%, and (b) in Table 1 is the film configuration for a transmittance of 86.01% at a wavelength of 500 nm. Next, the refractive indices of the transparent low refractive index and high refractive index layers are the same as above, and the film thickness ratio of gold and manganese (refractive index n _M = 2.404, absorption coefficient K _M = 0.048) is used as the colorant. Table 2 shows the composition of the pink colored antireflection film when used as 1:0.694.

[Table] In addition, (a) in Table 2 is the transmittance at a wavelength of 500 nm.
92.66%, and (b) in Table 2 is the film configuration for a transmittance of 86.01% at a wavelength of 500 nm. In these examples, if the gold film thickness exceeds 0 and changes to 21.28 nm while keeping the ratio of the total film thickness of gold and ferric oxide or manganese as described above,
It is clear that the concentration can be varied arbitrarily. The absorption characteristics of gold are large near the visible center wavelength;
Because it is small at short wavelengths, it exhibits a bluish-purple color, while ferric oxide and manganese exhibit a brown color because they gradually increase in size from long wavelengths to short wavelengths. Therefore, the combination of these two components results in a unique pink tone in which the overall absorption is large toward short wavelengths, and in addition, the absorption is slightly large near the center wavelength. FIG. 1 shows the spectral transmittance curve T and the surface spectral reflectance curve R _f for the film configuration of (a) in Table 2. In addition, the surface reflectance curve R and the back surface reflectance curve of the film obtained by measuring the surface reflectance, back surface reflectance, and transmittance of the same film configuration applied on the parallel plane substrate BK-7.
R' is further shown in FIG. 1 to show the coincidence of the front and back reflection characteristics in this film configuration. Similarly to the above, the curves T, R _f , R, and R' for the membrane structure in Table 2 (b) are shown in FIG. As seen from the data (FIGS. 1 and 2), the desired transmitted color tone density, antireflection properties, and front and back reflection properties match. Note that the membrane configurations in Table 1 are omitted because the same results as above can be obtained. f Effect In the present invention, a pink tone that cannot be obtained with a single component is created by combining two components, gold and ferric oxide or manganese, each as a single component layer. (a) By using a single component material in this way as opposed to a mixed material, it is advantageous in reducing the number of man-hours for material production, the strictness of the deposition conditions for maintaining the composition, and the resulting stability of the product. (b) Also, 2.
The film thickness ratio of the components can be arbitrarily selected, and the color tone can be delicately adjusted, which is also easy.

[Brief explanation of drawings]

FIGS. 1 and 2 are curve diagrams of the transmittance and reflectance in (a) and (b) of Table 2, respectively, showing the film structure of the present invention. T: spectral transmittance curve, R _f : surface spectral reflectance curve, R: surface reflectance curve, R': back surface reflectance curve.

Claims (1)

[Scope of Claims] 1 Gold and ferric oxide are used as colorants applied to optical members to color them, and the film structure is such that L is a transparent low refractive index layer and H is a transparent high refractive index layer. ,(air/
L/Au/L/Fe ₂ O ₃ /L/H/L/Fe ₂ O ₃ /L/
Au/L/H/L/H/glass), the ratio of the total thickness of the gold layer to the total thickness of the ferric oxide layer is 1:0.900, and the total thickness of the gold layer is greater than 0 nm and 21.28 nm. A pink colored anti-reflective film characterized by having the following range: 2 Gold and manganese are used as the colorants applied to the optical members to color them, and the film structure is as follows: (air/
L/Au/L/Mn/L/H/L/Mn/L/Au/
L/H/L/H/glass), the ratio of the total gold layer thickness to the manganese layer gold thickness is 1:0.694, and the total gold layer thickness is in the range of greater than 0 nm and 21.28 nm or less. A pink colored anti-reflective film characterized by: