Precision pressed optical components made of glass and glass suitable therefor
AssigneeU.S. Philips Corporation
InventorsGertraud A. A. Meden-Piesslinger, Johannes H. P. Van de Heuvel
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Abstract
Optical components can be pressed with such a precision that grinding and polishing of the formed components is not necessary, from glasses containing 45-55 wt. % P.sub.2 O.sub.5, 3.5-9 wt. % Al.sub.2 O.sub.3, 5-20 wt. % K.sub.2 O, 0-3 wt. % Li.sub.2 O, 8-15% BaO, 4.5-9 wt. % ZnO, 0-6 wt. % MgO, 0-18 wt. % PbO, 0-1 wt. % SiO.sub.2, 0-3 wt. % B.sub.2 O.sub.3, 0-2 wt. % TiO.sub.2.
Claims4
Precision pressed optical components made of glass, which components are pressed from a glass containing phosphorus pentoxide (P.sub.2 O.sub.5), one or more alkali metal oxides and one or more alkaline earth oxides, characterized in that the glass consists of in a percentage by weight:
- P.sub.2 O.sub.5 :
- 45-55
- Al.sub.2 O.sub.3 :
- 3.5-9
- K.sub.2 O:
- 5-20
- Li.sub.2 O:
- 0-3
- BaO:
- 8-15
- ZnO:
- 4.5-9
- MgO:
- 0-6
- PbO:
- 0-18
- SiO.sub.2 :
- 0-1
- B.sub.2 O.sub.3 :
- 0-3
- TiO.sub.2 :
- 0-2.
A glass containing phosphorus pentoxide, one or more alkali metal oxides and one or more alkaline earth oxides, characterized in that the glass consists of in a percentage by weight:
- P.sub.2 O.sub.5 :
- 45-55
- Al.sub.2 O.sub.3 :
- 3.5-9
- K.sub.2 O:
- 5-20
- Li.sub.2 O:
- 0-3
- BaO:
- 8-15
- ZnO:
- 4.5-9
- MgO:
- 0-6
- PbO:
- 0-18
- SiO.sub.2 :
- 0-1
- B.sub.2 O.sub.3 :
- 0-3
- TiO.sub.2 :
- 0-2.
Dependencies are inferred from the claim text.