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candy jones's Blogs >> candy226 According to the market survey indicated that discounted oakley sunglasses

What must remind the consumer specially is, the sunglasses are not equal to the pilot mirror. The pilot mirror divides into the daily expense and night use, should have can distinguish the different color the traffic signal characteristic. Regarding these mirror dual purpose's sunglasses, should have obvious caution marking, namely may use to make the everyday discount oakley sunglasses use pilot mirror or the night use pilot mirror. Has the special request to at night use's pilot mirror, it needs both to be able to cover at night dazzling glare or to dazzle dazzlingly, and can have the enough transmissivity in the visible light scope (> 75%), can distinguish the road surface and the pedestrian goal clearly. At present in the market had the considerable amount pilot mirror to be quite low in the visible light region transmission, wears such eyeglasses to drive at night, if encountered the emergency case, because eyeglasses' discrimination will lower presents the accident. At present in the market sunglasses have these problems?

The consumer when chooses the sunglasses, besides pays attention to the design, should consider sunglasses' quality question. Qualified sunglasses should be able to prevent the ultraviolet ray to penetrate, long wave ultraviolet UVA transmissibility control in allowable deviation scope, but to the midwave ultraviolet UVB part, take not by as good. Puts on oakley discount sunglasses such sunglasses to be able to cause the human eye the cornea, the crystal and the retina does not receive ultraviolet ray's violation. The sunglasses belong to the plain eyeglasses series. According to national standards stipulation, plain eyeglasses diopter allowable deviation for ¡À0.08D. That is, the sunglasses are most only allow to have the 0.08D diopter, surpasses this error namely regards as unqualified. The fake and shoddy sunglasses will pose these threats to the consumer?

According to the market survey indicated that at present still had 30% above sunglasses to have the high diopter. Also some sunglasses have oakley minute the big prism (i.e.: The slanting light), the normal vision's consumer puts on this kind to have the number of degree or to have the big prism sunglasses, quite Yu Dai nearsightedness or the slanting light microscope, from now on will summer have become the true ametropia patient. In brief, involves sunglasses' specialized knowledge to be many. May result in the sunglasses which the net sells after the Chinese measurement courtyard strict examination, and has the certificate, welcome you to come to select and purchase. Is different according to the filtration polarized light's mechanism, the polariscope may divide into the rotatory polarization mirror (i.e. CPL) and the linear polariscope (i.e. LPL) two kinds, these two kind of functions are the same. LPL mainly uses in the old style manual focusing camera. Presented late CPL to increase a 1/4 wave length thin film, this kind of thin film had one special nature, might to a direction (supposition be x) the oakley polarized polarization electric vector had ¦Ð/2 the phase-shift, but to and its vertical direction (supposition was y) electric vector not any function. Therefore may cause the above polarized light along x and the y internal bisector direction through 1/4 wave plate, therefore the exit ray is a bunch has two kind of directions of polarization vertical, phase difference ¦Ð/2 polarized light synthesis optical fiber, is also the so-called circularly polarized light.