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US 10,912,457 B2Granted
Lighting system for simulating conditions of color deficient vision and demonstrating effectiveness of color-blindness compensating eyewear
AssigneeEnChroma, Inc.
InventorAndrew Schmeder
Life of this patent
Estimating the term…
Abstract
The invention generally relates to devices that demonstrate the function of ophthalmic lenses that modify human color perception and to methods and devices that simulate color vision deficiency or color blindness.
Claims16
A system for demonstrating an optical filter designed to ameliorate the effects of color vision deficiency comprising:
- a lighting apparatus comprising a yellow light emitter emitting yellow light with a narrow-band spectral peak having a maximum wavelength between 570 nanometers and 600 nanometers and a band-width of between 1 nanometers and 40 nanometers at half maximum;
- and
- an optical filter designed to ameliorate the effects of color vision deficiency having a transmission spectrum comprising a spectral notch having a transmission minimum located between 570 and 600 nanometers and having a half-minimum width of 40 nanometers or less,
- wherein the lighting apparatus is configured to illuminate a colorful object which can be viewed by a person through the optical filter.
1 more element
A method for demonstrating an ophthalmic lens designed to ameliorate the effects of color vision deficiency comprising:
- illuminating a colorful object with a lighting apparatus comprising a yellow light emitter emitting yellow light with a narrow-band spectral peak having a maximum wavelength between 570 nanometers and 600 nanometers and a band-width of between 1 nanometers and 40 nanometers at half maximum;
- providing to a person a first view of the colorful object illuminated by the lighting apparatus;
- and
- providing to the person a second view of the colorful object illuminated by the lighting apparatus and filtered by an optical filter, the optical filter having a transmission spectrum comprising a spectral notch having a transmission minimum located between 570 and 600 nanometers and having a half-minimum width of 40 nanometers or less.
1 more element
Dependencies are inferred from the claim text.