MONOCHROMATOR, CENTRIFUGAL SEPARATOR EQUIPPED WITH MONOCHROMATOR, AND METHOD FOR CAPTURING STRAY LIGHT IN MONOCHROMATOR

Japanese Patent JP3184279

B2

PURPOSE: To prevent a stray light from returning to a diffraction grating on account of reflecting and scattering, and from mixing with the output of a monochromator, by forming surfaces having different optical characteristics on the inner wall of an optical tube.
CONSTITUTION: An optical tube 34 of a monochromator 30 is made of segments 36, 38 which are coupled by an elbow 39, in which a diffraction mirror 40 is arranged. An incident light 59 from a light source 44 is guided to the mirror 40. On the inner surface of a tube 34 for capturing a stray light, the following are formed; a very smoothly reflecting half-absorption surface, comparatively smooth half-absorption surface, and a roughly scattering high absorption surface. First characteristic is arranged more adjacently to the mirror 40, second characteristic is arranged in the vicinity of the outlet end of the segment 38. Third characteristic is arranged below the segment 38, thereby turning the stray light away from the diffraction grating and the outlet of the monochromator 30.

JPS53133459	DIGITAL SPECTROMETER
JP2001523334	Description: Spectral bioimaging method for cell classification
WO/2020/058702	RAMAN SPECTROSCOPY METHOD AND APPARATUS

Robert H. Gibeler Jr.

JP2161592A

July 09, 2001

January 13, 1992

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Beckman Coulter Incorporated

G01J3/12; G01J3/02; G01J3/18; G01J3/42; G01N21/07; G02B5/00; (IPC1-7): G01J3/18; G01N21/07

【文献】米国特許4300835(US,A)
【文献】米国特許4919537(US,A)

Nobuyuki Matsunaga

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