Patent ID: 9297992
Filing Date: 2016-03-29
CPC Classification: G02B

Claim Text:
1. A method for illuminating a sample in a microscope, the method comprising: illuminating the sample alternately or simultaneously in transmitted light bright field illumination and in incident light fluorescence illumination; using a white light LED as a light source for the transmitted light bright field illumination, said white light LED comprising a conversion dye that emits yellow-green light when excited by blue light; and activating a correction filter in an illumination beam path of the transmitted light bright field illumination when the white light LED is turned OFF and a fluorescence source of the incident light fluorescence illumination is turned ON, wherein the correction filter absorbs blue light of the incident light fluorescence illumination to minimize transmission of the blue light to the white light LED, and the correction filter absorbs yellow-green light emitted from the conversion dye in response to receiving the minimized blue light of the incident light fluorescence illumination, thereby minimizing transmission of yellow-green light from the conversion dye.