Heat absorbing glasses

Details Heat absorbing glasses Heat absorbing glasses

1974-06-17

1976-03-16

Garvin, Patrick P.

Optics: image projectors

Temperature control

Heat filter

106 47Q, 106 52, 106 54, G03B 2118, C03C 300

Patent

active

039443523

ABSTRACT:
This invention relates to heat absorbing glass compositions exhibiting strain points in excess of 560.degree.C. and transmissions to visible radiations suitable for optical applications. Such glasses consist essentially of Fe.sub.2 O.sub.3, Na.sub.2 O, Al.sub.2 O.sub.3, SiO.sub.2, and P.sub.2 O.sub.5, wherein NH.sub.4 H.sub.2 PO.sub.4 constitutes an essential ingredient of the batch.

REFERENCES:
patent: 1961603 (1934-06-01), Berger
patent: 2194784 (1940-03-01), Berger
patent: 2269494 (1942-01-01), Tillyer
patent: 2294844 (1942-09-01), Gelstharp
patent: 2359789 (1944-10-01), Pincus
patent: 3220861 (1965-11-01), Parry et al.
patent: 3326703 (1967-06-01), Harrington
patent: 3711264 (1973-01-01), Robinson et al.

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