Absorption path controlled filter

Details Absorption path controlled filter Absorption path controlled filter

1982-06-24

1985-03-05

Arnold, Bruce Y.

350312, G02B 524, G05D 2500

Patent

active

045027587

ABSTRACT:
A controlled absorption path filter for charge couple device seekers is made using a variable depth fluid. The use of a liquid as an absorber permits the entire aperture area to darken without loss of aperture. Thus the device provides a uniform extinction feature which preserves the system modulation transfer function. The device can be tied to a closed loop system with automatic gain control for feedback. Depending on the nature of absorber in the liquid, the device can also serve as a spectral filter. The device is applicable for visible light to near infrared light.

REFERENCES:
patent: 612937 (1898-11-01), Uebelacker
patent: 1234333 (1917-07-01), Heathcote
patent: 2537011 (1951-01-01), Aparicio
patent: 3560077 (1971-02-01), Sooy et al.
patent: 3572907 (1971-03-01), Cindrich
patent: 3990786 (1976-11-01), Jorna et al.
patent: 4065207 (1977-12-01), Zavitsanos et al.
Amelio, Charge-Coupled Devices, "Scientific American," vol. 230, No. 2, F 1974, pp. 22 to 31.
Marshall Graham, A Piezoelectric Fine-Focusing Optical Mount, Rev. Sci. Instrum., vol. 45, No. 8, Aug. 1974, pp. 1026-1027.

Affiliated with

Also associated with

Rating

Absorption path controlled filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Absorption path controlled filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absorption path controlled filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1731675