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Blue Block 1.56 Semi Finished Lens Blanks HMC EMI Coated UV420 Protection
Home » Products » Semi Finished Lens » SF Blue Block Lens » Blue Block 1.56 Semi Finished Lens Blanks HMC EMI Coated UV420 Protection
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Blue Block 1.56 Semi Finished Lens Blanks HMC EMI Coated UV420 Protection

  • Semi Finished Blue Block
  • Aogang
  • 9001509900
  • 1.56
  • 70mm
  • NK55, imported from Japan
  • 42
  • 1.15
  • > 97%
  • HC, HMC
  • Base: 50~1000
Quantity:

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Technical Data

1.56 Blue Block Spherical Lens
Material: 1.56 Index Resin(Ne=1.549, Abbe value=42, Specific gracity=1.15)
CONVEX SURFACECONCAVE SURFACE


Mominal CurveTrue CurveSag(sagitta: 40mm)Sag(sagitta: 50mm)RadiusRadiusCT(mm)ET(mm)Dia(mm)
1.549
0.500.49
0.180.281,117.4790.508.415.470
1.001.10
0.400.63498.708.514.3
2.002.06
0.751.17265.998.513.7
3.003.01
1.091.71182.538.511.6
4.004.03
1.462.29136.228.310.2
5.005.03
1.822.86109.088.59.4
6.006.07
2.203.4690.109.49.3
7.006.94
2.523.9779.1310.79.5
8.008.13
2.964.6867.5512.39.5
9.009.83
3.605.7355.8613.78.9
10.0010.59
3.896.2251.8614.07.8
12.0012.51
4.647.5143.8990.2215.08.1


Product Features

  • Harmful effects of blue light
     

According to the research, 63% of adults do not know that a variety of electronics (computers, tablets, television, videos games and Smartphones) produce blue light, also called high-energy visible (HEV) light. The council also notes than 41% of adults have never tried – or do not know how – to reduce digital eye discomfort, and 70% of adults experience some form of digital eye strain due to ongoing use of electronic devices.

Blue Block 1.56 Semi Finished Lens Blanks HMC EMI Coated UV420 Protection

 

The good news is that most patients don’t have to suffer with these symptoms and conditions. In the past few years, the optical industry has made great strides in creating new lens technologies designed to filter bad blue light, thus decreasing eye strain, reducing head and neck pain, sleep deprivation and posture problems from viewing digital devices. Optical manufacturers and opticians are successfully improving the whole digital experience for users with the newest computer and office lenses, along with specialized anti blue ray lenses.

 

Blue Block 1.56 Semi Finished Lens Blanks HMC EMI Coated UV420 Protection
  • UV420-cut lens

 

----UV+420cut technology filters out not only UVA&UVB, but also high-energy visible light(HEV light) of 400nm-420nm

 

----Latest reasearch has shown that blocking UV and HEV light is critical for protecting eyes against cataracts and age-related macular degeneration(AMD).

 

----We are still exposed to 60% of Ultraviolet rays on cloudy days and 20%-30% on rainy days. Oue blue cut lens can provide protection under all weathers. 


Coating Choice

Hard Coating:

Employed to enhance the corrosion resistance or abrasion resistance of the treated surface.

 

AR/HMC Coating:

Used to reduce reflection from surfaces. Whenever a ray of light moves from one medium to another (such as when light enters a sheet of glass after travelling through air), some portion of the light is reflected from the surface (known as the interface) between the two media.

Blue Block 1.56 Semi Finished Lens Blanks HMC EMI Coated UV420 Protection


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contact us

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CONTACT

Add: East Of Nongganxiao, Situ Town, Danyang City, Jiangsu Province, China

Tel:+86-511-86550315
Phone No: +86 18796035231
Fax: +86-511-86555316
Email: admin@ag-optical.com.cn
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