Optical phase plate and production process thereof

Details Optical phase plate and production process thereof Optical phase plate and production process thereof

1990-03-08

1991-08-27

Arnold, Bruce Y.

Optical: systems and elements

Extended spacing structure for optical elements

Extension of tubular element adjustable

252582, 252585, 264 13, 359494, G02B 104, G02B 108

Patent

active

050429248

ABSTRACT:
An optical phase plate is provided in the form of a drawn and oriented film or sheet, having a composition comprising a vinylidene fluoride resin and a methyl methacrylate resin in a mixing ratio of the former to the latter between about 65/35 and about 85/15 by weight, in which the crystal structure of the vinylidene fluoride resin consists mainly of a .beta.-form and the film or the sheet has dimensional stability and a retardation value R within a range from 500 to 650 nm. The optical phase plate is produced by uniformly kneading and melt-extruding the predetermined PVDF/PMMA mixture into a sheet and subjecting the sheet to drawing and then to heat treatment.

REFERENCES:
patent: 3459834 (1969-08-01), Schmitt
patent: 3790645 (1971-08-01), Murayama et al.
patent: 4863648 (1989-09-01), Scheinbeim et al.
S. Osaki et al., "Effects of Annealing and Isothermal Crystallization upon Crystalline Forms of Poly(vinylidene Fluoride)", JOURNAL OF POLYMER SCIENCE, Polymer Physics Edition, vol. 13, 1971-1083 (1975).
Bernard R. Hahn et al., "Compensation Method for Zero Birefringence in Oriented Polymers", POLYMER, 1985, vol. 26, Oct., pp. 1619-1622.

Affiliated with

Also associated with

Rating

Optical phase plate and production process thereof 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 phase plate and production process thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical phase plate and production process thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1411227