Multi-band color vision filters and method by lp-optimization
AssigneeEnChroma, Inc.
InventorsAndrew W. Schmeder, Donald M. McPherson
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Abstract
The invention generally relates to optical filters that provide regulation and/or enhancement of chromatic and luminous aspects of the color appearance of light to human vision, generally to applications of such optical filters, to therapeutic applications of such optical filters, to industrial and safety applications of such optical filters when incorporated, for example, in radiation-protective eyewear, to methods of designing such optical filters, to methods of manufacturing such optical filters, and to designs and methods of incorporating such optical filters into apparatus including, for example, eyewear and illuminants.
Claims36
A multi-band optical filter for affecting color vision, the filter comprising:
- a plurality of pass-bands and stop-bands partitioning the visible spectrum, including,
- three or more pass-bands interleaved with two or more stop-bands, wherein
- each pass-band has a center, a width, a lower band boundary equal to the center minus half the width, an upper band boundary equal to the center plus half the width, and a mean transmittance,
- each stop-band has a center, a width, a lower band boundary equal to the center minus half the width, an upper band boundary equal to the center plus half the width, and a mean transmittance,
- the lower band boundary of each interleaved stop-band is the same as the upper band boundary of an adjacent pass-band,
- the upper band boundary of each interleaved stop-band is the same as the lower band boundary of an adjacent pass-band,
- the first pass-band has a center located between about 435 nanometers and about 465 nanometers and a width of between about 20 and about 50 nanometers,
- the second pass-band has a center located between about 525 nanometers and about 555 nanometers and a width of between about 20 and about 40 nanometers,
- the third pass-band has a center located between about 610 nanometers and about 660 nanometers and a width of between about 30 and about 80 nanometers, and
- each of the interleaved stop-bands has a width of at least about 40 nanometers and a mean transmittance that is less than about one half of the mean transmittance of an adjacent pass-band.
Dependencies are inferred from the claim text.