公开(公告)号：US10663348B2

公开(公告)日：2020-05-26

申请号：US15533848

申请日：2015-11-20

Applicant: KONICA MINOLTA, INC.

Inventor： Takuma Morikawa ,  Masafumi Hashimoto

IPC: G01J3/50 ,  G01N21/27 ,  G01J3/02 ,  G01N21/15 ,  G01J3/10 ,  G01N21/47 ,  G01N21/25 ,  G01J3/46 ,  G03G15/01 ,  G03G15/00 ,  G03G21/00

Abstract: A housing (20) has a passage port (3) that serves as both the outlet for the illumination light (IL) to go out of the housing (20) toward a sample surface (S) and the inlet for the reflection light (RL) reflected on the sample surface (S) to enter the housing (20). A transparent member (19) is disposed at the passage port (3) to prevent dust including paper dust from entering the housing (20). A light quantity calculation unit (71) calculates the light quantity of light received by a light reception lens (33). A notification unit (81) performs a predetermined notification when the light quantity is less than or equal to a predetermined value.