Method for making a direction sensitive contrast enhancement fil

Details Method for making a direction sensitive contrast enhancement fil Method for making a direction sensitive contrast enhancement fil

1981-10-30

1983-09-20

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 916

Patent

active

044059396

ABSTRACT:
A method for making a direction sensitive contrast enhancement filter for a shadow mask color cathode ray tube is disclosed to minimize the amplitude of moire interference patterns to unnoticeable or unobjectionable levels. For a particular color cathode ray tube phosphor dot size, the light transmission through a direction sensitive enhancement filter having a given hole size and spacing is determined mathematically. The filter is then moved a number of fixed increments with respect to the phosphor dot and the light transmission is determined for each incremented position. The variation in light transmission as the filter is moved incrementally across the phosphor dot is the data recorded. This procedure is repeated for different hole sizes and different hole spacings and the data graphed to find the minimum light transmission variation. At this minimum light transmission variation moire patterns are reduced to unnoticeable or unobjectional levels. A selected planar material then has holes or optically clear channels of the selected radius and spacing placed therethrough to make the filter.

REFERENCES:
patent: 3439207 (1969-04-01), Barten

Affiliated with

Also associated with

Rating

Method for making a direction sensitive contrast enhancement fil does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for making a direction sensitive contrast enhancement fil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making a direction sensitive contrast enhancement fil will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-590559