OPTICAL FILTER DEVICE FOR ILLUMINATING A SAMPLE

OPTICAL FILTER DEVICE FOR ILLUMINATING A SAMPLE

An optical filter device (102) for illuminating a sample (104) comprises a light supply unit (108) configured to generate input light (110) of a predetermined spectral bandwidth in a collinear manner, an acousto-optic tunable filter (112) configured to receive the input light (110) and to emit diffr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: Krishnamachari, Vishnu Vardhan
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
FREQUENCY-CHANGING
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:An optical filter device (102) for illuminating a sample (104) comprises a light supply unit (108) configured to generate input light (110) of a predetermined spectral bandwidth in a collinear manner, an acousto-optic tunable filter (112) configured to receive the input light (110) and to emit diffracted output light (126) including multiple wavelengths from the spectral bandwidth at exit angles towards the sample (104), said exit angles defining an angular spread (C) among the multiple wavelengths of the output light (126). The angular spread (C) among the multiple wavelengths of the output light (126) is determined by an angular characteristic (W2-W5) varying from a minimum wavelength to a maximum wavelength. The angular characteristic (W2-W5) has an extremum at an intermediate wavelength between the minimum wavelength and the maximum wavelength to provide at least one group (P1-P3, T1-T3) of different wavelengths having the same exit angle.