| 摘要 |
A gas sensor (20) comprising a substrate (231); an objective (211) situated on the substrate (231), adapted to collect a light beam (212, 213) emitted by a light source (210); an eyepiece (250) situated on the substrate (231), adapted to collect an incident light beam to focus it on a detector (251); return reflective surfaces (281, 282), situated facing said substrate; and at least one field lens (221), arranged on an intermediate reflective surface (222) formed on the substrate (231), and adapted to deviate the rays (213) of the light beam emitted by the light source, to bring them closer to the optical axis of the eyepiece (250). |
| 主权项 |
1. Gas sensor (20; 30; 50; 60) comprising a cavity (270) for receiving a gas, a light source (210) and a detector (251), characterised by:
a substrate (231); an objective (211) situated on the substrate (231), adapted to collect a light beam (212, 213) emitted by the light source (210); an eyepiece (250) situated on the substrate (231), adapted to collect an incident light beam to focus it on the detector (251); reflective surfaces known as return surfaces (281, 282), situated facing said substrate; and at least one relay lens (221; 321, 322), arranged on a reflective surface known as intermediate surface (222) formed on the substrate (231), and comprising at least one field lens (221; 321) adapted to deviate the rays (213) of the light beam emitted by the light source, to bring them closer to the optical axis of the eyepiece (250); the objective (211), the eyepiece (250), the relay lens (221; 321, 322), the intermediate reflective surface (222), and the return reflective surfaces (281, 282) together forming an optical system laid out such that the light beam (212, 213) emitted by the light source (210) propagates by successive reflections from the objective (211) to the eyepiece (250) while passing through the relay lens (221; 321, 322). |
