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Home  > Products and Service  > Optical products  > New Glass Types  > S-NBH52, S-NBH53
 
New Glass Types
 

S-NBH52, S-NBH53

 

In comparison with general optical glasses, S-NBH52/S-NBH53 demonstrates unique characteristic in that the intensity of fluorescence from ultraviolet ray excitation is remarkably low. Therefore, the conventional problem of noise due to self fluorescence within an optical lens can be reduced. In addition, these glasses also provide abnormal dispersion and high transmittance, both of which are advantageous for lens design.


  S-NBH52 BPH35 S-NBH53 S-TIH3
Optical properties Refractive Index nd 1.67300 1.64450 1.73800 1.74000
Abbe Number νd 38.15 40.8 32.26 28.30
Coloring λ80 360 380 385 420
λ5 320 320 335 360
Anomalous dispersion θ g,F 0.5754 0.5687 0.5899 0.6079
Thermal Properties CTE α
(10-7/°C)
-30~70°C 86 48 69 85
+100~300°C 109 62 89 100
Transformation Point Tg(°C) 520 485 578 615
Yield Point At(°C) 556 519 620 644
Mechanical Properties Specific Gravity 3.09 3.46 3.28 3.11
Knoop Hardness Hk 590 [6] 470 [5] 600 [6] 560 [6]
Abrasion Aa 123 111 114 165
Chemical Properties Water Resistance RW(p)
(Powder Method)
1 3 1 1
Acid Resistance RA(p)
(Powder Method)
1 5 1 1
Weathering Resistance W(s)
(Surface Method)
4 3 2 1
Acid Resistance SR 1.0 52.1 1.0 1.0
Phosphate Resistance PR 1.0 4.2 1.0 1.0
Detail Catalog DATA PDF   PDF PDF
Please consult us about available shape, size and tolerance.
 

365nm excitation fluorescence spectrum

365nm excitation fluorescence spectrum

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