File:Spontaneous Raman hyperspectral imaging setup.svg
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Captions
Captions
Spontaneous Raman hyperspectral imaging : typical optical setup
Summary[edit]
| Description |
English: A focused laser beam illuminates the sample at a given point in the sample plane (1). There, part of the Raman scattered light is collected by an objective (O). This collected light is spectrally filtered to discard laser light (dichroic filter (D) and notch filter (F2)); and spatially filtered with a confocal element (e.g., slit (S)). The frequency components contained in the Raman signal are then dispersed with a grating (G) onto a camera. A hyperspectral image is then obtained by repeating the procedure for each (x,y) coordinate of the sample plane. This is done by either scanning the sample stage (1) or the laser beam (2).
O: objective, M: mirror, L: lens (or other converging optics), D: dichroic mirror, S: slit, G: grating, F1: laser line filter, F2: notch filter
Français : Un faisceau laser est focalisé en un point donné de l’échantillon (1). Une partie du signal Raman diffusé est collecté par un objectif (O). Ce signal est séparé spectralement du signal Rayleigh et du signal émanant du laser par un miroir dichroïque (D) et un filtre coupe-bande (F2). Le filtrage spectral est assuré par un ou plusieurs éléments confocaux (ex. fente d’entrée (S)). Les composantes spectrales contenues dans le signal Raman sont ensuite séparées par un réseau de diffraction (G) et imagées sur une caméra. L’image hyperspectrale est finalement obtenue en mesurant un spectre Raman par coordonnée spatiale (x,y) de l’échantillon (par scan de le l’échantillon (1) ou du faisceau laser (2))
O: objectif, M: miroir, L: lentille (ou autre optique convergente), D: miroir dichroïque, S: fente, G: réseau, F1: filtre passe-bande laser, F2: filtre coupe-bande |
| Date | |
| Source | Own work |
| Author | Camille Scotté |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:26, 4 December 2021 | | 440 × 201 (293 KB) | Cameeko (talk | contribs) | addition of Raman spectrum |
| 20:06, 4 December 2021 |  | 440 × 201 (301 KB) | Cameeko (talk | contribs) | Uploaded own work with UploadWizard |
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