GOB

We supply preformed gobs which are suitable for double-sided glass mouldings. Gobs are produced by injecting the molten glass directly into moulds. The internationally patented Tritan® crystal glass is used for this.

Technical properties

• Refraction index      n_d          1,5221
• Abbe number            V_d        56,75
• Density                  g/cm³          2,52
• Thermal expansion α (20°C; 300°C)  10e-6*K^-1       9,3

Semi-finished glass products

• Gobs are suitable for double-sided glass mouldings
• A lens is pressed from the gob due to a transformation at approx. 400° – 850°C
• The advantage of the glass mouldings is the diversity of shapes which a pressed optical part can take (e.g. notches, openings, edgings)

Download:
Gobs – Table of sizes & weights for semi-finished glass products