公开(公告)号：FR2651575A1

公开(公告)日：1991-03-08

申请号：FR8911607

申请日：1989-09-05

Applicant: INSTRUMENTS SA

Inventor： JEAN-CLAUDE GAUTHERIN ,  HENRI ZEGRE

IPC: G01J3/02 ,  G01J3/20 ,  G01N21/68

Abstract: The subject of the invention is a spectroscopic analysis device comprising a light source, a light analyzer comprising an entrance slit, a diffraction grating and at least one exit slit which are disposed along a Rowland circle, and an optical transmission system. According to the invention, the entrance slit (3) is mounted so as to be displaceable along the Rowland circle (1), on either side of a central position, the optical transmission system comprises a first, fixed part (I) associated with the light source (5; 8) and a second, movable part (II) associated with the entrance slit (3) and mounted so as to be displaceable parallel to itself in a direction (a1, a2; b1, b2; c1, c2) parallel to the tangent (T) to the Rowland circle (1) at the central position of the entrance slit (3), and the device comprises means for controlling the displacement, in synchronism, of the entrance slit (3) along the Rowland circle (1) and of the movable part (II), parallel to the tangent (T), with maintenance of the direction of the optical axis of the assembly.