Method for preparing filmy intraocular lens
An intraocular lens and film type technology, applied in the optical field, can solve the problems of increasing the antireflection optical properties of intraocular lenses, etc., and achieve the effects of small thermal expansion coefficient, controllable film thickness and good compactness
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Embodiment 1
[0038] [Example 1] Preparation of anti-reflection film intraocular lens
[0039] The intraocular lens with PMMA as the main material (select Alcon KC60BN+20D intraocular lens, Alcon (China) Ophthalmic Products Co., Ltd.) (the refractive index of PMMA is 1.491), and the silicone gel (or water) with a refractive index of about 1.41 is selected. Gel) is coating material, the optical thickness nh=(2k-1) * 135nm of thin film, n is the refractive index of film, h is the thickness of thin film, k is any integer, silicon gel is plated on artificial with ion beam method The surface of the lens is formed into a single-layer film; after testing, the prepared anti-reflection film intraocular lens makes the transmittance of green light exceed 90%.
Embodiment 2
[0040] [Example 2] Preparation of anti-reflection film intraocular lens
[0041] The intraocular lens with acrylate as the main material (select Alcon ACRYSOF® SA60AT+20D intraocular lens, Alcon (China) Ophthalmic Products Co., Ltd.). Hydrogel or acrylate is the coating material, the optical thickness of the film is nh=(2k-1)×170nm, n is the refractive index of the film, h is the thickness of the film, and k is any integer. A single-layer film with a lower refractive index than the intraocular lens is coated; the prepared anti-reflection film intraocular lens has a transmittance of more than 90% for red light.
Embodiment 3
[0042] [embodiment 3] preparation of anti-reflective film intraocular lens
[0043] Intraocular lens with PMMA as the main material (Alcon KC60BN +20D intraocular lens, Alcon (China) Ophthalmic Products Co., Ltd.), the refractive index of the intraocular lens is 1.491; the coating material is polycarbonate with a refractive index of about 1.60 As the high film, select nh=(2k-1)×110nm as the optical thickness of the high film, PMMA with a refractive index of 1.491 is used as the low refractive index material, and the high film and the low film interval are coated to form a plurality of reflection-enhancing surfaces, which are respectively coated with 10 Layers and 20 layers of optical film; After testing, the IOL with 10 layers of anti-reflection film reduces the transmittance of blue light by 30%, and the IOL with 20 layers of anti-reflection film reduces the transmittance of blue light by 80%.
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