Lead glass composition series for gradient glasses

Details Lead glass composition series for gradient glasses Lead glass composition series for gradient glasses

1995-06-06

1996-04-02

Epps, Georgia Y.

Optical: systems and elements

Lens

With graded refractive index

359652, G02B 106, G02B 312

Patent

active

055046231

ABSTRACT:
A fused glass block having an axial gradient index of refraction profile between two opposed parallel surfaces, with a change in refractive index from one of the surfaces to the other ranging from about 0.04 to 0.47, is provided. The fused glass block has a change in thermal expansion coefficient from one of the surfaces to the other of less than about 3.times.10.sup.-7 .degree. C..sup.-1, has essentially no strain or birefringence therein, and has a smoothly varying refractive index profile from one of the surfaces to the other. The fused glass block is prepared from at least two pre-selected compositions of a lead-silicate glass series that has been discovered to provide the requisite properties.

REFERENCES:
patent: 4883522 (1989-11-01), Hagerty et al.
patent: 4907864 (1990-03-01), Hagerty et al.
patent: 4929065 (1990-05-01), Hagerty et al.
patent: 5044737 (1991-09-01), Blankenbecler
patent: 5200858 (1993-04-01), Hagerty et al.

Affiliated with

Also associated with

Rating

Lead glass composition series for gradient glasses does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lead glass composition series for gradient glasses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lead glass composition series for gradient glasses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2020738