Fecha de publicación: 21/06/1977 Fuente: WIPO "pollen" Improved apodization filter serving as the field stop of a scanning radiometer and attenuating unwanted light modulation signals when scanning edges of any field of view resulting in more accurate radiometric measurements. -GOVT PAR The invention described herein may be manufactured, used and licensed by or for the Government for governmental purposes without the payment to me of any royalty thereon.