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1. (WO2018100255) PASSIVE DEVICE FOR DECREASING THE POLLUTION OF AN OPTICAL ACCESS OF AN OPTICAL INSTRUMENT

Pub. No.:    WO/2018/100255    International Application No.:    PCT/FR2017/000221
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Wed Nov 29 00:59:59 CET 2017
IPC: G01N 21/15
Applicants: ARIANEGROUP SAS
Inventors: BAILET Gilles
Title: PASSIVE DEVICE FOR DECREASING THE POLLUTION OF AN OPTICAL ACCESS OF AN OPTICAL INSTRUMENT
Abstract:
The device (1) includes a part (2) that is provided with a channel (3) having a first end (3A) that is intended to open into a polluting environment (4), said channel (3) having a substantially rectilinear axis (X-X) and an average general diameter d, the part (2) also being provided with a cavity (5) that is produced at a second end (3B) of the channel (3), which end is opposite said first end (3A), said second end (3B) of the channel (3) opening into the cavity (5), said cavity (5) having an open end (5B) that is opposite said second end (3B) of the channel (3), this open end (5B) being intended to face an optical instrument (IO), said cavity (5) having an average general diameter D, the ratio between the average general diameter D and the average general diameter d being higher than or equal to 2.