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SPOTLIGHT GLASS--BOROSILICATE FLOAT GLASS 3.3(BG33) 

Specifications

glass for high power spotllight 
borosilicate glass 3.3 
powerful heat resistance 
high softening point 
high quality glass 

 

Characteristics:

Great heat resistance performance, stable chemical property

High light transmission

Various thicknesses for you to choose

Wide optical application

Technical Data

Dimensions(mm):                    1150×850   1150×1700  1200×600

                                    (other size could be produced upon the request)

Thickness(mm):                      2—20

Density(g/cm3)(at25C):               2.23±0.02

Expansion coefficient(α)(200-300C):   3.3±01×10-6

Softening point C):                   820±10

Identical temperature difference(K):     100      >300(strengthening type)

Thermal shock resistance(K):           ≥125

Maximum working temperature(C):   ≤450

Refractive(nd):                        1.47384

Light transmission:                    92(thickness≤4mm)  91%(thickness≥5mm)

Processing:                          cutting, edge processing, drilling, coating,

 toughening treatment, printing etc.