Safety filter microembolism of compensation of color. The invention relates to a filter and a method for filtering an optical beam.A method of the filter is an optical filter for filtering an incident light beam.It comprises a material otu00edcamente efficiently characterized by: a transmu00edtu00e2ncu00eda light smaller than 1% for wavelengths below 420 nm; and a light transmittance to the compressesInts wavelengths complementary to wavelengths below 420 nm which, combined with the transmu00edtu00e2ncia for wavelengths below 420 nm.A beam of light to generate a filtered has a luminosity of about 90% and the purity of the excitement of 5% or less.The additional wavelengths may be the wavelengths above approximately 640 nm wavelengths above approximately 660 nm.And / or wavelengths of approximately 540 nm to approximately 560 nm.Yet, in one mode, the difference between the transmu00edtu00e2ncia light below 420 nm and the light transmittance above 420 nm can be greater than 90% above 420 nm.In some methods, the transmu00edtu00e2ncu00eda of light can be arbitrarily determined.The optically effective material may be a glass optical grade plastic or polymer, a grade optical coating, a dielectric thin film.Or a glass or plastic is coated with a coating dielu00e9tru00edco optical grade.The optical filter may be mounted downstream of an opening out of light source, the light source produces a beam of incident light.And the amount of an area to be illuminated by the light beam of the filtrate.Alternatively,The optical filter may be operatively mounted on a set of optical sight of a surgical microscope to filter a reflected portion of a light beam produced by a source of iluminAction and used to illuminate a location, such as a surgical site.
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