Patent ID: 9491377
Filing Date: 2016-11-08
CPC Classification: G03B,H04N

Claim Text:
1. A camera for capturing an image of an object in an optical path emanating from the object, comprising: a CCD for capturing the image, the CCD disposed at a distant end of the optical path and having at least four different pixel responses to light emitted from the object; an optical filter for removing energy of a portion of the spectrum of wavelengths between red and NIR, the optical filter disposed in the optical path between the object and the CCD; and a ND filter for attenuating light, the ND filter disposed in the optical path between the object and the CCD; wherein the ND filter allows a first percentage of light in a visible wavelength region incident on the ND filter to be transmitted through the ND filter, and allows a second percentage of light in a NIR wavelength region incident on the ND filter to be transmitted through the ND filter, the first percentage being lower than the second percentage, wherein the first percentage is 20-30% and the second percentage is 82-94%.