Polarizing optical system

Details Polarizing optical system Polarizing optical system

1996-08-01

1999-10-19

Spyrou, Casandra

Optical: systems and elements

Polarization without modulation

Glare prevention by discriminating against polarized light

359485, 359501, 501 11, 501 53, 501 73, G02B 530

Patent

active

059698616

ABSTRACT:
A polarizing optical system comprising: at least, polarizing characteristic imparting means for imparting a polarizing characteristic to light emitted from a light source; analyzer means for converting the polarizing characteristic into light intensity information; and output means for outputting the light intensity information; at least one element constituting the polarizing characteristic imparting means comprising an optical glass having a photoelastic constant C in the range of substantially zero with respect to a wavelength range of 0.4 .mu.m to 3.0 .mu.m. The optical glass has a photoelastic constant C in the range of -0.8 to +0.8 (10.sup.-8 cm.sup.2 /N) with respect to a wavelength range of 0.4 .mu.m to 3.0 .mu.m, and has the following composition when represented in terms of wt.% of oxides:

REFERENCES:
patent: 3801878 (1974-04-01), Merrin
patent: 4127322 (1978-11-01), Jacobson et al.
patent: 5375012 (1994-12-01), Borrelli et al.
Optical Technology Contact, Etsuhiro Mochida, Birefringence by Phase Modulation Method-Measurement and Application.
Patent Abstracts of Japan, JP pat No. 3-50138, Mar. 1991, Abs. date May 1991, vol. 15, No. 193.

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