Application Of UV Adhesive In Glasses

- Jan 25, 2018-

According to the lens material classification: can be divided into glass lenses, resin lenses, crystal lenses.

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Glass lenses: Glass is the earliest used as a material for eyeglass lenses. Although the lenses are generally resin lenses, but the glass lens in that era has an irreplaceable role. The higher the degree of glass lenses, the greater the thickness. As the thickness increases, the quality of the glass lens also increases, so it is gradually replaced by the resin lens.

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Resin lenses: light weight, not fragile, security is the largest optical resin material features. Its weight is about the general glass lenses; impact resistance is 10 times higher than the glass, chemical stability and light transmittance is also good, UV absorption, easy processing. However, the same lack of resin lenses: low hardness, easy to scratch, poor heat resistance. At present, there are mature processing technologies for these cases of resin lenses, so long as the coating of various functions on the surface of the lens can greatly solve the above problems. For example, attach a layer of hard film, you can increase the lens hardness, more scratch-resistant.

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Crystal lens: Crystal is a transparent quartz crystal, the main component of silica. Its refractive index and density higher than glass lenses. The advantages of crystal lenses: high hardness, high temperature, friction, easy to wet. Disadvantages: hardness, processing difficult, heavy, expensive. Most of this natural crystal impure texture, uneven color, making the transmittance decreased. Its optical performance is inferior to that of glass, so it is basically unnecessary now.

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In accordance with the design of the lens classification: can be divided into spherical lenses, single aspherical lenses, double aspherical lenses.

Spherical lens: refers to the convex surface, concave spherical lens. The first lens is spherical design, and later people found spherical lens aberration. The presence of aberrations does not make the wearer to see the visual sensation is not particularly true.

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Aspherical lenses: aspherical lenses are divided into single-sided aspheric and double-sided aspherical.

Compared to spherical lenses, aspherical lenses are mainly as follows:

1, small deformation, wide field of vision. (We glasses, the general optical shops and hospitals have a spherical and aspherical vision contrast, a comparison we can see the difference)

2, compared to spherical lenses more thin

Double-sided aspherical lenses: This lens is more effective in patients with astigmatism, he can reduce the deviation of astigmatism, making the lens more superior performance.

Compared with the single-sided aspheric lens advantages of double-sided aspheric as follows:

1, a broader vision, vision to see more clearly

2, luminosity can play better, more superior to astigmatism lenses

3, the overall lens more light

Aspherical lenses suitable for the crowd:

1, like to wear large glasses people

2, height and astigmatism crowd

3, the first time wearing glasses

4, anisometropia

5, contact lenses and glasses worn alternately frames

CRCBOND UV glue in the glasses polarized lenses gluing applications

1: (A) Two lenses bonded

Colorful polarizer / fog lenses polarized lenses bonding

Adhesive strength / 120 degree heat shock test.

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2: two lenses + polarizer bonding

Two transparent acrylic film + polarized lenses bonding

Adhesive strength / 120 degree heat shock test.


2-1 (B) Two transparent PMMA polarizer plus a layer of PVA polarizing film

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2-2 (C) Two transparent PMMA polarizers with a layer of PVA polarizing film (PET film with PET on both sides)

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