basketball shoes kids Abbe number

Basics 20 hours ago ,nike shoes for kids What's ~ ~ ~

1, how to interpret the index?

light propagation velocity in air and light in the lens of the propagation velocity ratio (N), the higher the refractive index,basketball shoes kids, the more thin lenses.

2, the thickness of the lens Security Center (International)

glass resin 1.0MM 0.7MM

3, Abbe with the dispersion, refractive index

The higher refractive index, Abbe number, the lower the dispersion the greater the

4, the refractive index of glass lenses which

1.523 1.61 (Zeiss unique) 1.7 1.8 1.9

5, the refractive index of resin lens which

1.499 1.56 1.61 1.67 1.701 1.74

6, resin lens which process?

hardened plus AR film (green film amethyst diamond gold film film) plus UV radiation plus film film (EMI) staining

7, how to explain to customers polarized lenses?

such as shutters, like polarized lenses allow only light to pass through a certain direction, it can filter out part of the stray light, the light becomes soft and can reduce glare, so that we more clearly see objects more real . Particularly suitable for fishing and driving

8,50 □ 18 135 mean?

□ box notation refers to the level of 50 is the maximum diameter of 18 frames is the beam length 135 refers to the length of the legs mirror

9, frame the CE mean?

EU quality system certification

10, What are the advantages of non-spherical lens?

(1) vortex pattern less, look beautiful (2) lifelike images, more clear, easy fatigue

(3) lenses lighter and more books (4) a broader vision

11, What are the characteristics of pure titanium frames?

(1) lighter than 48% nickel alloy frame (2) corrosion resistance are not allergic to

(3) not fade (4) temperature of 2900 degrees for welding, sealing off a very solid hard

12, used the natural materials which frames?

tortoiseshell horn wood

13, NO NIKEL, NIKEL FREE mean?

this frame does not contain nickel

14, I care solution company after opening their validity?

Boshi Lun Bao seeing: 4 months Hai Chang Wei Kang round natural beauty: three

15. SCL can be divided according to what type of life cycle?

two weeks of daily disposable week throwing throwing throwing six month season throwing throwing extended wear

16. How to distinguish plate frame frame with plastic injection?

sheet: (1) nose pad is Nianshang Qu's (2) mirror legs hekou Department has cut the texture

(3) Mirror has polished texture circle (4) color three-dimensional,on sale nike shoes, do not fade

17. ZS top ten selling

(1) world of professional cameras, camera lenses used to do such as Sony ZS lenses, Suha

(2) First, both inside and outside the lens curvature by computer calculation, adhere to a degree Only one of the best combinations of curvature

(3) fine grinding error is low. Zeiss three-dimensional surface grinding technology, accuracy to ensure the best optical quality,nike air kids shoes Although China in recent year, visual clarity, image distortion

(4) a good visual quality can be achieved tomorrow, as the scope of 56MM

(5) multi-wavelength coating, reflecting the soft light reflecting harmful effect

(6) Abbe coefficient,cheap air max 95, low dispersion, imaging quality and stability

(7) excellent quality, through the breadth of high-up to 99%

(8) high-precision planetarium and the precision of the top body detector (for example, Mercedes-Benz, BMW) are from Zeiss

(9) security center thickness resin 1. 5MM Glass 0. 8MM

(10) world-class brands have 150 years of history, and certainly by Einstein

18. What types of two-light?

flat line double double double optical light dome light invisible double optical

19. Coated lenses feature?

(1) increase the transmission rate (2) anti-reflective (3) effectively block the harmful rays (4) water fog

20. FROME JAPAN MADE IN JAPAN and What's the difference?

The former is made in Japan which is the brand from Japan