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Process for treating an ophthalmic lens
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A spectacle lens and lens technology, which is applied in the direction of thin material processing, glasses/goggles, coating, etc., and can solve problems such as difficulty in handling lenses
Inactive Publication Date: 2012-07-18
ESSILOR INT CIE GEN DOPTIQUE
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[0026] Difficulty handling such lenses by conventional means
Method used
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example 1
[0124] deposited on CR39 performed on the substrate of the base ophthalmic lens, the CR39 The base ophthalmic lens comprises on both sides a polysiloxane type abrasion resistant coating corresponding to Example 3 of patent application EP614957. Wash the lenses in an ultrasonic cleaning vessel; and steam at a temperature of 100°C for a minimum of 3 hours. They are then ready for processing.
[0125] Two different types of lenses are processed:
[0126] - round lenses,
[0127] -Such as figure 2 Pre-calibrated lenses shown.
[0128] 1.1 Preparation of Lenses Comprising an Antireflective Hydrophobic and / or Oleophobic Coating
[0129] The vacuum processing unit used was a BalZers BAK 760 unit equipped with an electron gun, an "end-Hall" Mark 2 Commonwealth type ion gun and a Joule effect evaporation source.
[0130] The mirror is placed on a carousel with the concave side exposed to the evaporation source and ion gun.
[0131] The circular lenses are placed on the outer...
example 2
[0153] The substrates were the same painted CR39 as those used in Example 1 Spectacle lenses. They were washed in an ultrasonic cleaner and steamed at a temperature of 100°C for a minimum period of 3 hours.
[0154] 2.1 Preparation of Lenses Including Hydrophobic and / or Oleophobic Coatings
[0155] The vacuum processing apparatus used was a Leyhold LH1104 type apparatus equipped with an electron gun, a Mark2 type ion gun and a Joule effect evaporation source.
[0156] The mirror is placed on a carousel with the concave side exposed to the evaporation source and ion gun.
[0157] Circular lenses are placed on the outer crown (in the most sensitive zone for processing) of the carousel and in the central part of the carousel.
[0158] Pre-aligned lenses are also placed on the crown and center sections of the carousel.
[0159] Vacuum pumping is performed until a second vacuum is reached.
[0160] Thereafter, sequential evaporation was performed by heating the evaporation sour...
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Abstract
The present invention relates to a process for treating an ophthalmic lens comprising two main sides the first one of which comprises a thin external organic or inorganic layer, comprising:- at least one treatment step for the second lens side through energetic and / or reactive species capable to perform a surface physical attack and / or chemical modification,- in option, at least one or more stepsfor depositing inorganic or organic layers carried out simultaneously or subsequently to the treatment step through said energetic and / or reactive species,characterized in that before the treatment step through energetic and / or reactive species, a deposition of a temporary protective layer is performed onto the thin external organic or inorganic layer.Application to ophthalmic optics.
Description
technical field [0001] The invention relates to a method for obtaining an ophthalmic lens comprising two main sides, the first side comprising at least one outer organic or inorganic thin layer modifying the surface properties of the lens. [0002] More precisely, this method allows obtaining an ophthalmic lens comprising two main sides, each containing a multilayer coating, the outer layer of which is a thin layer having hydrophobic and / or oleophobic properties . Background technique [0003] Typically, ophthalmic lenses containing a multilayer coating are obtained by depositing evaporated material on the surface of the lens in a vacuum enclosure. [0004] According to one conventional arrangement, the lens is provided on a carousel or cover mounted in the upper part of the vacuum enclosure, and wherein there are provided a plurality of positions above which the lens will be located, more specifically a round hole. [0005] By convention, this article will use the follow...
Claims
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