Pistachio sorting device

Abstract

A pistachio sorting device capable of accurately detecting BGY fluorescence emitted from a fluorescent material adhered to a shell of an in-shell pistachio to perform pass/fail determination and sort out defective products at high speed is provided. The pistachio sorting device comprises a lighting device 11 for irradiating in-shell pistachios which are objects to be sorted in an inspection region with ultraviolet light having a maximum peak wavelength within a range of 345 nm to 390 nm, an optical filter 12 for selectively transmitting light within a wavelength range of 500 nm to 600 nm, a sensor 13 for detecting a two-dimensional intensity distribution of the fluorescence transmitted through the optical filter 12 to generate two-dimensional image data indicating a two-dimensional intensity distribution of fluorescence in the inspection region, and a determining device for determining a pass/fail of for each object to be sorted 10 based on the two-dimensional image data.

Dependencies are inferred from the claim text.