Optical film, optical assembly comprising same and preparation method thereof
An optical film and optical component technology, applied in optical components, optics, instruments, etc., can solve the problems of poor adhesion and low mechanical strength of magnesium fluoride films, and achieve the effect of strong adhesion, excellent optical properties and mechanical properties
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Embodiment 1
[0071] [Preparation of MgF2 sol]
[0072]Weigh hydrofluoric acid and magnesium acetate according to the F / Mg molar ratio of 2.0, first dissolve hydrofluoric acid in methanol to obtain hydrofluoric acid methanol solution, and dissolve magnesium acetate in methanol to obtain magnesium acetate methanol solution, and then stir Add the hydrofluoric acid methanol solution to the magnesium acetate methanol solution to form a clear precursor solution, and then transfer the precursor solution to a polytetrafluoroethylene-lined reactor, under the condition of high temperature and self-pressure at 150°C After heat treatment, a light blue MgF2 sol with a concentration of 0.38 M was obtained. During the above heat treatment at 150°C, the by-product acetic acid can be reacted with the solvent methanol to form methyl acetate. Because the MgF2 sol contains acetic acid, it is easy to form a gel without high temperature and high pressure treatment and cannot form a film.
[0073] [MgF2 sol re...
Embodiment 2
[0094] [Preparation of MgF2 sol]
[0095] Weigh hydrofluoric acid and magnesium acetate according to the F / Mg molar ratio of 2.0, first dissolve hydrofluoric acid in methanol to obtain hydrofluoric acid methanol solution, and dissolve magnesium acetate in methanol to obtain magnesium acetate methanol solution, and then stir Add the hydrofluoric acid methanol solution to the magnesium acetate methanol solution to form a clear precursor solution, and then transfer the precursor solution to a polytetrafluoroethylene-lined reactor, under the condition of high temperature and self-pressure at 150°C After heat treatment, a light blue MgF2 sol with a concentration of 0.38 M was obtained. During the above heat treatment at 150°C, the by-product acetic acid can be reacted with the solvent methanol to form methyl acetate. Because the MgF2 sol contains acetic acid, it is easy to form a gel without high temperature and high pressure treatment and cannot form a film.
[0096] [MgF2 sol r...
Embodiment 3
[0108] [Preparation of MgF2 sol]
[0109] Weigh hydrofluoric acid and magnesium acetate according to the F / Mg molar ratio of 1.95, first dissolve hydrofluoric acid in methanol to obtain hydrofluoric acid methanol solution, and dissolve magnesium acetate in methanol to obtain magnesium acetate methanol solution, and then stir Add the hydrofluoric acid methanol solution to the magnesium acetate methanol solution to form a clear precursor solution, and then transfer the precursor solution to a polytetrafluoroethylene-lined reactor, under the condition of high temperature and self-pressure at 150°C After heat treatment, a light blue MgF2 sol with a concentration of 0.38 M was obtained. During the above heat treatment at 150°C, the by-product acetic acid can be reacted with the solvent methanol to form methyl acetate. Because the MgF2 sol contains acetic acid, it is easy to form a gel without high temperature and high pressure treatment and cannot form a film.
[0110] [MgF2 sol ...
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