公开(公告)号：US20230117589A1

公开(公告)日：2023-04-20

申请号：US17905223

申请日：2021-02-25

Applicant: ELDIM

Inventor： Thierry Leroux

IPC: G01J1/02 ,  G01J1/04

Abstract: A device allowing the angular emission pattern of a source to be measured without mechanical movement comprises, in succession, along its optical axis: a first objective, called the Fourier objective, arranged to form a Fourier surface each point of which corresponds to one direction of observation of the object; a diffuser used in transmission and placed on the Fourier surface; a substance of optical density placed upstream of the diffuser and arranged to attenuate the light backscattered toward the Fourier objective and the areal source; and a video photometer located downstream of the plane of the diffuser and arranged to image the surface of the diffuser.

公开(公告)号：US11525734B2

公开(公告)日：2022-12-13

申请号：US17043493

申请日：2019-03-29

Applicant: ELDIM

Inventor： Thierry Leroux

IPC: G01J3/50 ,  G01J3/02 ,  G01N21/95

Abstract: A system for measuring the spatial distribution of the spectral emission of a measurement zone of an object, comprises: a first objective; means for selecting a portion of an image formed by the first objective; a diaphragm; light-dispersing means located in the vicinity of the diaphragm and allowing the light coming from the selecting means to be dispersed; and a second objective placed between the selecting means and the diaphragm, interacting with the first objective so that the aperture of the diaphragm is optically conjugated with the measurement zone by the first and second objectives. The first objective forms an image on a predetermined Fourier surface on which each point corresponds to an emission direction of the object for one particular wavelength. The selecting means have a selection surface shaped depending on the predetermined. Fourier surface, and the selecting means are placed on the predetermined Fourier surface.

公开(公告)号：US20210172802A1

公开(公告)日：2021-06-10

申请号：US17043493

申请日：2019-03-29

Applicant: ELDIM

Inventor： Thierry Leroux

IPC: G01J3/50 ,  G01J3/02

Abstract: System (100) for measuring the spatial distribution of the spectral emission of a measurement zone (2) of an object (1), comprising: a first objective (202); means (204) for selecting a portion of an image formed by the first objective; a diaphragm (208); light-dispersing means (210) located in the vicinity of the diaphragm and allowing the light coming from the selecting means to be dispersed; a second objective (206) placed between the selecting means and the diaphragm, interacting with the first objective so that the aperture of the diaphragm is optically conjugated with the measurement zone by the first and second objectives and so that the measurement zone. According to the invention, the first objective forms an image on a predetermined Fourier surface on which each point corresponds to an emission direction of the object for one particular wavelength, the selecting means have a selection surface shaped depending on the predetermined Fourier surface, and the selecting means are placed on the predetermined Fourier surface.