SPECTRAL DEVICE

Provided is a spectral device which easily increases the variable range of a selected wavelength without an increase in the size of the device. A spectral device (1) comprises four band pass filters (11a to 11d) through which light (L2) from a light source (3) is selectively transmitted in a wavelen...

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Bibliographic Details
Main Authors YONEZAWA MICHIHARU, FUKUYO FUMITSUGU
Format Patent
LanguageEnglish
French
Japanese
Published 28.07.2011
Subjects
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Summary:Provided is a spectral device which easily increases the variable range of a selected wavelength without an increase in the size of the device. A spectral device (1) comprises four band pass filters (11a to 11d) through which light (L2) from a light source (3) is selectively transmitted in a wavelength range in accordance with an incidence angle of the light (L2), and a flat rotary table (10) which has a main face (10a) on which the band pass filters (11a to 11d) stand and is configured to be rotatable around the rotary center (C1) along the main face (10a). The four band pass filters (11a to 11d) are disposed so that optical incidence faces (12) or optical exit faces (13) thereof are inclined relative to lines connecting the rotary center (C1) of the main face (10a) of the rotary table (10) and the center points (15a to 15d) of the band pass filters (11a to 11d) on the main face (10a), respectively. La présente invention concerne un dispositif spectral permettant facilement d'augmenter la plage variable d'une longueur d'ondes sélectionnée, sans augmentation des dimensions du dispositif. Un tel dispositif spectral (1) comprend, d'une part quatre filtres passe-bande (11a à 11d) au travers desquels la lumière (L2) provenant d'une source de lumière (3) est sélectivement transmise dans une plage de longueurs d'ondes en fonction d'un angle d'incidence de la lumière (L2), et d'autre part un plateau rotatif plat (10), qui comporte une face principale (10a) sur laquelle reposent les filtres passe-bande (11a à 11d), et qui est configuré pour pouvoir tourner autour du centre de rotation (C1) le long de la face principale (10a). Ces quatre filtres passe-bande (11a à 11d) sont disposés de façon que leurs faces d'incidence optique (12) ou leurs faces de sortie optique (13) soient inclinées, chacune en ce qui la concerne, par rapport aux lignes reliant le centre de rotation (C1) de la face principale (10a) du plateau rotatif (10) aux points centraux (15a à 15d) des filtres passe-bande (11a à 11d) de la face principale (10a).
Bibliography:Application Number: WO2011JP50122