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CN-122018067-A - Dual-band reflection optical film system and optical lens

CN122018067ACN 122018067 ACN122018067 ACN 122018067ACN-122018067-A

Abstract

The invention discloses a dual-band reflective optical film system and an optical lens. The film system comprises seven layers of all-dielectric optical films, namely a titanium pentoxide layer, a silicon dioxide layer, a zirconium dioxide layer, a titanium pentoxide layer and a silicon dioxide layer, wherein the reflectivity of the film system at 385-445 nm of blue light wave band is 20-35%, the reflectivity at 780-1400 nm of near infrared wave band is more than or equal to 40%, the reflectivity at 500-780 nm of visible light wave band is less than or equal to 1%, and the film system is of an absorption-free structure. The film system is based on the design of an all-medium pure interference structure, realizes the accurate regulation and control of multiband spectrum in a single film system, and has three characteristics of short-wave blue light blocking, near infrared high-efficiency heat insulation and visible light extremely high transmission. The invention fundamentally overcomes the technical bottlenecks of single function, heat accumulation caused by photo-thermal conversion, damaged light transmittance and the like of the traditional absorption type protective lens, and is suitable for various vision protection products with strict requirements on color reduction degree and heat protection.

Inventors

  • CHEN YUXIANG

Assignees

  • 厦门虹泰光学有限公司

Dates

Publication Date
20260512
Application Date
20260325

Claims (8)

  1. 1. The dual-band reflection optical film system is characterized by comprising seven layers of optical films, wherein each film layer has the following structure: the first film layer is a titanium pentoxide layer, and the physical film thickness is 140-150 nm; the second film layer is a silicon dioxide layer, and the physical film thickness is 280-290 nm; the third film layer is a titanium pentoxide layer, and the physical film thickness is 150-160 nm; The fourth film layer is a silicon dioxide layer, and the physical film thickness is 190-200 nm; the fifth film layer is a zirconium dioxide layer, and the physical film thickness is 35-40 nm; The sixth film layer is a titanium pentoxide layer, and the physical film thickness is 75-85 nm; The seventh film layer is a silicon dioxide layer, and the physical film thickness is 25-35 nm; the reflectivity of the film system in the 385-4475 nm blue light wave band is 20-35%, the reflectivity in the 780-1400 nm near infrared light wave band is more than or equal to 40%, and the reflectivity in the 500-780 nm visible light wave band is less than or equal to 1%.
  2. 2. The dual band reflective optical film system of claim 1, wherein: The refractive index of the titanium pentoxide layer is 2.05-2.15; the refractive index of the silicon dioxide layer is 1.45-1.47; the refractive index of the zirconium dioxide layer is 1.83-1.87.
  3. 3. The dual band reflective optical film system of claim 1, wherein each film layer has the following structure: the first film layer is a titanium pentoxide layer, and the physical film thickness is 144nm; The second film layer is a silicon dioxide layer, and the physical film thickness is 288nm; the third film layer is a titanium pentoxide layer, and the physical film thickness is 154nm; the fourth film layer is a silicon dioxide layer, and the physical film thickness is 196nm; the fifth film layer is a zirconium dioxide layer, and the physical film thickness is 38nm; the sixth film layer is a titanium pentoxide layer, and the physical film thickness is 80nm; The seventh film layer is a silicon dioxide layer, and the physical film thickness is 30nm; The film has a reflectance of 22% in a 385-445nm blue light band, a reflectance of 42% in a 780-1400 nm near infrared light band, and a reflectance of 0.49% in a 500-780 nm visible light band.
  4. 4. The dual-band reflective optical film system of claim 1, wherein said dual-band reflective optical film system is disposed on a convex surface of a lens substrate.
  5. 5. The dual-band reflection optical lens is characterized by comprising a lens substrate and the dual-band reflection optical film system according to any one of claims 1 to 4, wherein the dual-band reflection optical film system is arranged on the convex surface of the lens substrate, the first film layer is close to the convex surface of the lens substrate, and the seventh film layer is far away from the convex surface of the lens substrate.
  6. 6. The dual-band reflection optical lens of claim 5, wherein the lens substrate is made of polycarbonate material and has a refractive index of 1.50-1.60.
  7. 7. The dual band reflective optical lens of claim 6, wherein said lens substrate has a refractive index of 1.57.
  8. 8. The dual band reflection optical lens of claim 5, wherein the lens is used for preparing a near-view mirror, a sunglass, a sport mirror, a driving mirror, a pair of protective glasses or an electronic display goggles.

Description

Dual-band reflection optical film system and optical lens Technical Field The invention relates to the technical field of optical films, in particular to a dual-band reflection optical film system and an optical lens comprising the same, which are particularly suitable for vision protection products for simultaneously protecting blue light and infrared rays. Background With the popularization of electronic display devices and the increase of outdoor activity time, the problem of harmful light radiation suffered by human eyes is increasingly prominent. The blue light with the wavelength of 385-445 nm can penetrate through the lens to reach the retina, eye diseases such as asthenopia, macular degeneration and the like can be caused by long-time irradiation, and near infrared light with the wavelength of 780-1400 nm mainly generates a thermal effect to cause thermal dryness-heat phenomena such as burning sensation, dryness and discomfort of eyes. Protective lenses currently on the market are mainly of two types: one type is an absorption type protective lens, which blocks light of a specific wavelength band by adding an absorber into a base material or coating an absorption film on the surface. Such lenses suffer from significant drawbacks: 1. The absorbed light energy is converted into heat energy, so that the temperature of the lens is increased, and wearing comfort is poor; 2. The protection performance can be reduced due to ageing of materials after long-term use; 3. The light-absorbing film also has certain absorption to visible light, and influences the light transmittance and color authenticity. Another type is a reflective protective lens, in which a single-layer or multi-layer dielectric film is generally used to achieve reflection in a specific wavelength band, but the prior art focuses on single-band protection, such as only blue light protection or only infrared light protection, and it is difficult to achieve dual efficient reflection of blue light and infrared light while maintaining high light transmittance in a wide visible light band. Disclosure of Invention The invention aims to provide a dual-band reflection optical film system which can simultaneously realize high-efficiency reflection of harmful short-wave blue light and near-infrared heat radiation, keep near-zero reflection and high light transmittance for a visible light band, and simultaneously has a pure interference structure without absorption, so that the heat accumulation effect is fundamentally eliminated. In order to achieve the above object, the present invention provides a dual-band reflective optical film system comprising: The optical film comprises seven layers of optical films, and each film layer has the following structure: the first film layer is a titanium pentoxide layer, and the physical film thickness is 140-150 nm; the second film layer is a silicon dioxide layer, and the physical film thickness is 280-290 nm; the third film layer is a titanium pentoxide layer, and the physical film thickness is 150-160 nm; The fourth film layer is a silicon dioxide layer, and the physical film thickness is 190-200 nm; the fifth film layer is a zirconium dioxide layer, and the physical film thickness is 35-40 nm; The sixth film layer is a titanium pentoxide layer, and the physical film thickness is 75-85 nm; The seventh film layer is a silicon dioxide layer, and the physical film thickness is 25-35 nm; The film has a reflectance of 20-35% in 385-4475 nm blue light band, a reflectance of not less than 40% in 780-1400 nm near infrared light band, a reflectance of not more than 1% in 500-780 nm visible light band, and a transmittance of not less than 99%. Further, the refractive index of the titanium pentoxide layer is 2.05-2.15, the refractive index of the silicon dioxide layer is 1.45-1.47, and the refractive index of the zirconium dioxide layer is 1.83-1.87. Further, each film layer structure is as follows: the first film layer is a titanium pentoxide layer, and the physical film thickness is 144nm; The second film layer is a silicon dioxide layer, and the physical film thickness is 288nm; the third film layer is a titanium pentoxide layer, and the physical film thickness is 154nm; the fourth film layer is a silicon dioxide layer, and the physical film thickness is 196nm; the fifth film layer is a zirconium dioxide layer, and the physical film thickness is 38nm; the sixth film layer is a titanium pentoxide layer, and the physical film thickness is 80nm; The seventh film layer is a silicon dioxide layer, and the physical film thickness is 30nm; The film has a reflectance of 22% in a 385-445nm blue light band, a reflectance of 42% in a 780-1400 nm near infrared light band, and a reflectance of 0.49% in a 500-780 nm visible light band. Further, the dual-band reflective optical film is disposed on the convex surface of the lens substrate. The invention also provides a dual-band reflective optical lens, comprising a lens substrate and t