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18 Cards in this Set
- Front
- Back
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Tint |
Visual comfort w/ protection from harmful rays Cat.A = absorbs visible light but maintains the integrity of the color Pink,grey and brown absorb brightness w/o distorting our perception Color dyed Plastic Oxide tinted lenses Cat.B = selective filtering lens Protection from UV, Infrared, Blue light and Glare , Infrared, Blue light and Glare |
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Dip Type Dye Coating |
Least expensive and easy Least amount of abrasion resistance Dip lensr dye like chemical,then cure in oven Wont crack or peel Limited amound of protection due to minimal amount of coating |
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Spin Flow Lacquer Coatings |
Expensive organic silicon chemicals onto spinning lens Cured with UV or in Oven Excellent abrasion resistance Limit to minus side coating Can not stripped of or redone once its cured |
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In Mold Coatings |
Newest and best Coating added to a mold as lens is being cast Superior bonding High tint ability and abrasion resistance |
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Edge Treatments |
Cosmetic and practical Stylish and reduce thickness and diminish annoying internal reflection Best for minus lenses |
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Edge Toning |
Applying special dye to rimless or beveled edge of plastic lens Camouflaging thickness Reduce and soften side light reflections |
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Edge Coating |
Color not translucent and work with glass or platic lenses Paint like material will block all internal reflected sidelight Reflective rings dissipated |
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Rolled And Polished Edge |
Back edge (mostly) of minus lens rolled inward Grinding process, time consuming ,by hand Plastic,poly,glass Makes lens and frame look oneness |
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Faceted or Scalloped Edges |
Hand cutting process Cut can be made front only, back only or on both sides Removes unused material Looks stylish |
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Colorlined Edges |
Grooved rimless mounting Hand painted clean groove to match frame Border of delicate color |
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Tempered Lenses |
*process to make glass impact resistant ( safety requirement ) *not unbreakable but improved breakage protection *3 methods: Case Hardening, Chem Treated, Super Toughed |
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Case Hardening |
*1800Degree Oven * time determined by size,thickness,and weight of lens * when "softend" state is reached,lens is removed and hit both sides with cooling jets of air * lens cools rapidly on the outer surface and slower at inner core aka cushion effect = allows the inner core great amount of impact before fracturing *breaks into smaller less dangerous pieces *not recomm. +/- 6 D |
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Chem Tempering |
*set up harder outside w/ process of ion exchange *molten bath of potassium based chemical, the heat triggers an ion exchange *replacement of small molecules with larger ones creates harder and compact oute surface *14-16 hrs process |
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Super Tuff |
*most advanced *just like Chem Tempering but with a more sophisticated mechanical unit *incl electrified bath that draws potassium ions more deeply into lens *results in deeper compression layer, greater impact resistance * 4 hours process |
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Drop Ball Test |
Dress Safety : *5/8 inch steel ball .6 oz drooped 50inch Safety : *7/8 inch steel ball, 1 1/2 oz dropped 50inch |
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Why AR ? |
*Plastic reflects 8% * Hi Index reflects 12% * light rays reflect front surface,back surface, internal reflections and corneal reflection |
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AR Coat
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*vacuum deposition coating methodology
*all in one process integrates scratch coating ,anti reflective and hydrophobic coating *controlling the compatibility of all layers included ( prevents bad adhesion and creates durability) 1.cleaning uncoated lens 2.apply scratch resistant coating 3.lens surface prep 4.apply AR layers 5.apply hydrophobic clean coat 6. quality control |
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AR Market |
Japan 95% Europe 75% Canada 50% USA 21% ( 4 out of 5 w/o AR) |
