Basic Info.
Specification
63-16-130mm
Product Description
Frame: Stainless frame with Patent PC Plastic Temples.
Lens: Optical Quality Polarized lens, with 100% UVA and UVB Protection
Style: Tastefully molded frame, extremely comfortable and Lightweight.
Note: The bifocal inserts are tinted, but not polarized, allowing you to read your instruments with ease.
Frame Dimensions:
Height= 48 mm or 1.89 inches
Width = 61 mm or 2.40 inches
Overall Frame Width = 132 mm or 5.20 inches
Temple to Temple = 135 mm or 5.31 inches
The RA Series are available in the following Frame / lens color combination and magnifications / powers:
How do I know if mine are polarized?
Very easily done. Just look through the glasses at the reflection of any object on a window panel (but not at yourself! You have to look at an angle to the glass). Then, turn the sunglasses around as if they were the hands of a clock facing you. If the intensity of the reflection doesn't change with respect to what you see through the window, they are not polarized. Or you can use as your target image any of the numerous other examples of linear polarization mentioned in this web site, read on!
I still don't understand, why are polarized sunglasses better than normal dark sunglasses?
Normal sunglasses decrease the intensity of everything by the same amount. Polarized sunglasses can selectively eliminate the reflection from light coming from above the water surface.
Then, could polarized glasses be crystal clear?
Nope, they will always decrease the intensity of unpolarized light by at least half. In practice somewhat more because of losses in the material. They come in all shades from light gray (only polarizing) to very dark (polarizing plus black tint), and also light sensitive (photochromatic). You can even find sunglasses with darkness adjustable by the user.
Do polarized sunglasses help see fish and rocks below the water surface?
Yes. First, if there is glare, they help a lot by reducing its blinding effect. Second, even without glare they selectively reduce other reflections from objects above water, including clouds and even the sky (the reflected sky gives most of its blue color to the sea). Finally, light coming from under water is slightly polarized in the vertical plane (polarized on transmission). The end effect is that the water seems darker but more transparent! But remember, it only works if you look at the water at some angle and not straight down.
Does it matter the time of the day?
Yes. Maximum polarization is obtained when the sun is at about 37 degrees from the horizon (in theory 100% polarization at the Brewster angle). If the sun is very low or very high the sunglasses will be of little help in filtering the glare in calm seas. A rule of thumb would be that polarized filters limit the glare from calm waters for a sun altitude between 30 and 60 degrees (but see next question). Anyway, it should be stressed that polarization won't help in looking directly at the sun (except in decreasing the overall intensity of everything by half).
Does it matter the choppiness of the sea?
Yes. When the sea is ruffled the sun reflection becomes the familiar glitter, an elongated pattern of shimmering water stretching towards the sun. Because different parts of the glitter are reflected from different wave slopes, the degree of polarization varies from place to place. In those conditions the sunglasses will also help for high or low suns and the benefit will depend on where you are looking. As a side note, the width and length of the glitter together with the altitude of the sun can be used to compute the height of the waves without ever getting close to them!
Address:
No. 313 Ouhai Road, Wenzhou, Zhejiang, China
Business Type:
Manufacturer/Factory
Business Range:
Arts & Crafts, Health & Medicine, Light Industry & Daily Use, Sporting Goods & Recreation
Company Introduction:
We are one of leading glasses manufacturer in Wenzhou China, it is established in 2002, and there is about 100 workers in our factory. Our products are sunglasses, polarized sunglasses, driving glasses, fishing glasses, reading glasses, case pouch.
We can supply the customer various of style glasses, metal, injection, And it is with popular design and competitive price, also it is very good quality.
We have more than 8 years export experience, we supply to Wal-mart(U. S. A), Blue Gem(UK), Anglo(UK), HEMA BV(Holand), Target(USA), Watsons (H. K. ), Clas Ohlson(Sweden), ForstGrant(U. S. A) and so on.
Our product meet CE(EN1836: 2005 +A1: 2007)and ANSI Z80.3-2001 and AS NZS 1067 2003 and FDA standard, the lens meet UV400 standard, so we are sure that we can supply the good service for you if you select our products.
Our commitment: If you buy the same quality we can offer the best price and the best service.
Please free use the fax or email, we will send you the catalogue after we received your enquiry.
Thank you and look forward to hearing from you soon.