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Optical sheet and optical component

An optical sheet and light absorbing agent technology, applied in optical elements, optical elements, optical components, etc., can solve the problems of inability to obtain strength, difficulty in taking into account dye agglutination and high strength, etc., and achieve the effect of preventing agglomeration

Pending Publication Date: 2020-05-15
SUMITOMO BAKELITE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this case, sufficient strength after molding may not be obtained
[0005] In this way, it is difficult to balance the prevention of dye aggregation and high strength

Method used

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  • Optical sheet and optical component
  • Optical sheet and optical component
  • Optical sheet and optical component

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach ＞

[0037] figure 1 It is a perspective view of sunglasses provided with the optical sheet (1st Embodiment) of this invention. figure 2 It is a perspective view of the sun visor provided with the optical sheet (1st embodiment) of this invention. Figure 5 yes figure 1 Cross-sectional view of the optical element shown.

[0038] In addition, in figure 1 , figure 2 , Figure 5 (about Figure 6 Also the same), the upper side is also called "upper" or "upper", and the lower side is also called "lower" or "lower". In addition, in the drawings referred to in this specification, the dimensions in the thickness direction are shown exaggeratedly, and are greatly different from the actual dimensions.

[0039] figure 1 , figure 2 and Figure 5 The shown optical sheet 1 of the present invention is characterized in that it has a specific wavelength absorbing layer 11, the specific wavelength absorbing layer 11 is made of polycarbonate as a main material, and includes a material tha...

no. 2 Embodiment approach ＞

[0118] Figure 6 It is a sectional view of the optical element provided with the optical sheet (2nd embodiment) of this invention.

[0119] Hereinafter, the second embodiment of the optical sheet and the optical element of the present invention will be described with reference to this figure, but the differences from the above-mentioned embodiment will be mainly described, and the description of the same matters will be omitted.

[0120] This embodiment is the same as the above-mentioned 1st Embodiment except having a polarizing film.

[0121] (polarizing film)

[0122] Such as Figure 6 As shown, the optical sheet 1A further has a polarizing film 12 and an adhesive layer 13 . Polarizing film 12 is laminated on specific wavelength absorbing layer 11 via adhesive layer 13 . In the illustrated structure, the polarizing film 12 is disposed on the lens 4 side.

[0123] The polarizing film 12 has a function of extracting linearly polarized light having a polarization plane fro...

Embodiment 1

[0141] [1] First, by stirring and mixing 100 parts by mass of bisphenol A polycarbonate (manufactured by MITSUBISHI GAS CHEMICAL COMPANY, INC., "Iupilon E2000F E5111"), 0.04 parts by mass of a light absorber (YAMADA CHEMICALCO., LTD. "FDG-005" manufactured by ADEKA Corporation) and 0.4 parts by mass of an ultraviolet absorber ("ADK STABLA-31G" manufactured by ADEKA Corporation) were used to prepare an optical sheet forming material.

[0142] [2] Next, accommodate the optical sheet forming material in the image 3In the illustrated optical sheet manufacturing apparatus 100, melting is performed in the extruder 210, and extrusion molding is performed from a T-die 220 to obtain a sheet. Then, the sheet was cooled and molded in the sheet molding unit 300 , and cut into a rectangle with an average thickness of 0.3 mm and a planar view of 500 mm×500 mm to produce an optical sheet.

[0143] In addition, the polycarbonate has a viscosity average molecular weight Mv of 27000, a meltin...

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Abstract

The optical sheet according to the present invention is characterized by comprising a specific wavelength absorbing layer that includes polycarbonate as a main material, and includes a light absorberfor absorbing, from light with a wavelength of 350-740 nm, light with a specific wavelength, wherein the polycarbonate has a viscosity average molecular weight Mw of 20000-30000. In addition, the specific wavelength absorbing layer further includes an ultraviolet absorber for absorbing light within a wavelength range of 100-420 nm.

Description

technical field [0001] The invention relates to an optical sheet and an optical element. Background technique [0002] For example, there is known an optical sheet that absorbs a specific wavelength region from incident light for the purpose of improving the contrast of the field of view or preventing glare (for example, refer to Patent Document 1). This optical sheet is used by being attached to eyeglasses, sunglasses, a sun visor, and the like. [0003] The optical sheet described in Patent Document 1 includes, for example, a resin material and a dye (light absorber) that is contained in the resin material and absorbs light of a specific wavelength in the visible light region. The optical sheet is molded into a sheet shape by, for example, mixing a dye in a molten resin material, extruding it in this state, and then cooling it. [0004] However, depending on the resin material, the type of dye, etc., the dye aggregates during molding, and sometimes the dye partially aggr...

Claims

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Application Information

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IPC IPC(8): G02B5/22G02C7/10
CPCG02C7/104G02B5/223G02B1/10B29D11/00009B29D11/0073B29D11/00634B29D11/00788B29C48/08G02B1/04B29C48/305C08L69/00C08L2666/70Y10T428/31507B32B27/365B32B2551/00B32B27/306B32B2307/71B32B2307/4026B32B2307/42
Inventor 大山拓也石川哲也
Owner SUMITOMO BAKELITE CO LTD
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