Depolarizer for light measuring instruments

Details Depolarizer for light measuring instruments Depolarizer for light measuring instruments

1990-05-24

1991-07-02

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

350370, 356334, G01J 318, G01J 302

Patent

active

050281348

ABSTRACT:
Light measuring instruments have a sensitivity to polarization states of the light being measured. To minimize such sensitivity a depolarizer is used. The depolarizer includes a half wave polarization plate between the source of light being measured and the light measuring instrument or within the instrument, but ahead of the polarizing elements. The half wave plate is rotated through an angular sector of at least 90.degree. (.pi./2 radians) for each measurement period to ensure that all polarization states are measured. If the measurement period is sufficiently long, its half wave plate may be rotated asynchronously with respect to the measurement period through at least two and one-half revolutions.

REFERENCES:
patent: 4699512 (1987-10-01), Koshi
Billings, Journal of the Optical Society of America, vol. 41, Dec. 1951, pp. 966-975.
Hughes, Review of Scientific Instruments, vol. 31, 1960, pp. 1156-1157.
Rahn et al., Applied Spectroscopy, vol. 25, No. 6, 1971, pp. 675-677.

Affiliated with

Also associated with

Rating

Depolarizer for light measuring instruments does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Depolarizer for light measuring instruments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Depolarizer for light measuring instruments will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1242727