The instrument is suitable for the determination of light transmittance and haze value of various materials. Various transparent packaging films, including: biaxially oriented polypropylene pearlescent film, uniaxially oriented high-density polyethylene film, polypropylene blown film, heat-sealing biaxially oriented polypropylene film/common biaxially oriented polypropylene Film, unstretched polyethylene, polypropylene film, biaxially oriented polyamide (nylon) film, biaxially oriented polystyrene sheet, polyvinyl chloride (PVC) rigid sheet and film for food packaging.