Optical fluorophosphate glasses possessing positive anomalous pa

Details Optical fluorophosphate glasses possessing positive anomalous pa Optical fluorophosphate glasses possessing positive anomalous pa

1988-11-08

1989-08-15

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501902, C03C 3247, C03C 400

Patent

active

048574872

ABSTRACT:
Optical fluorophosphate glasses based on Ba(PO.sub.3).sub.2, Al(PO.sub.3).sub.3, alkaline earth metal fluorides and AlF.sub.3 are described which have a refactive index n.sub.e between 1.47 and 1.50, an Abbe-value .nu..sub.e between 85 and 80 and a positive anomalous partial dispersion value .DELTA..nu..sub.e between +17 and +22. They comprise (in wt.-%) 0.5-3 Mg, 8-10 Ca, 12-20 Sr, 9-12 Ba, 7-9 Al, 5-9 P, 8-12 O and 35-38 F. Ti, Na, K and H may additionally be present. The improved physico-chemical parameters (expansion coefficient, glass transition temperature, density, Knoop-hardness) and the transmission characteristics are given, and a process for producing these optical glasses is described.

REFERENCES:
patent: 3492136 (1970-01-01), Bromer et al.
patent: 3508937 (1970-04-01), Bromer et al.
patent: 3671276 (1972-06-01), Bromer et al.
patent: 4040846 (1977-08-01), Broemer et al.
patent: 4225459 (1980-09-01), Faulstich
patent: 4386163 (1983-05-01), Kodama

Affiliated with

Also associated with

Rating

Optical fluorophosphate glasses possessing positive anomalous pa does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical fluorophosphate glasses possessing positive anomalous pa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical fluorophosphate glasses possessing positive anomalous pa will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-121517