Gradient filter

Details Gradient filter Gradient filter

1990-05-29

1992-05-05

Lobo, Ian J.

Optical: systems and elements

Absorption filter

Neutral or graded density

359885, G02B 520, G02B 522

Patent

active

051113430

ABSTRACT:
A gradient filter is disclosed which is adapted to compensate for the variation of beam divergence of diode lasers. The gradient filter comprises a substrate having a transmission density distribution along at least one axis which is inversely proportional to a Gaussian intensity distribution along the axis. Such a gradient filter has a transmission profile which is transparent, or nearly so, at the center of the beam and which falls gradually to zero transmission in an area spaced from the center.

REFERENCES:
patent: 3465347 (1969-09-01), Hudson
patent: 3914016 (1975-10-01), Dreyer
patent: 3935545 (1976-01-01), Campillo et al.
patent: 4013338 (1977-03-01), Sato et al.
patent: 4093460 (1978-06-01), Weinstein
patent: 4298275 (1981-11-01), Critchlow et al.
patent: 4469407 (1984-09-01), Cowan et al.
patent: 4594507 (1986-06-01), Elliott et al.
patent: 4605606 (1986-08-01), Ferrante
patent: 4722581 (1988-02-01), Hamada et al.
patent: 4832469 (1989-05-01), Noguchi et al.
patent: 4933688 (1990-06-01), Brophy

Affiliated with

Also associated with

Rating

Gradient 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 Gradient filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gradient filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1417380