Patent ID: 6194701
Filing Date: 2001-02-27
Classification: G01N

Abstract:
A device for measuring transmissivity and haze in transparencies as detected through night vision goggles, comprising:(a) an emitter portion for placement near a first side of a transparency and a sensor portion for placement near the second side of the transparency in substantial confronting relationship with said emitter portion;(b) said emitter portion including a first infrared producing light source for presenting an image thereof to said sensor portion along a first optical axis through the transparency, and a second infrared producing light source disposed in preselected spaced relationship from said first light source for projecting light along a second optical axis disposed at a preselected angle to the first side of the transparency for producing haze in the transparency;(c) said sensor portion including a focusing lens disposed along said first optical axis for focusing light transmitted through the transparency, a light intensifier tube, and a photometer operatively connected to said light intensifier tube for measuring the luminance output thereof; and(d) a source of power for said emitter and sensor portions.