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Spectroscopic instrument and process for spectral analysis

A spectrum and instrument technology, applied in the field of spectrum analysis, can solve problems such as difficulties in expressing OCT signals quickly

Inactive Publication Date: 2014-09-10
WAVELIGHT GMBH
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  • Application Information

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Problems solved by technology

Said resampling requires a certain computation time, which makes a fast representation of the OCT signal difficult, especially when large amounts of data are determined for the spectral intensity distribution

Method used

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  • Spectroscopic instrument and process for spectral analysis
  • Spectroscopic instrument and process for spectral analysis
  • Spectroscopic instrument and process for spectral analysis

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Embodiment Construction

[0044] Systems used for optical coherence tomography are typically found in figure 1 represented by 10 in . In the exemplary case, the system 10 is used to inspect an object 12 shown in the form of a human eye. The optical coherence tomography is based on SD OCT or FD OCT.

[0045] The system 10 includes a light source 14 for emitting a coherent polychromatic light beam 16 . The light source 14 emits continuous coherent light that is broadband in frequency space. The light beam emitted from said light source 14 is directed onto a beam splitter 18 . The beam splitter 18 is an integral part of the interferometer 20 and splits the incident light output by the beam 16 according to a predetermined beam splitting ratio (eg 50:50). One beam of radiation 22 travels in a reference arm 24 ; the other beam of radiation 26 travels in a sample arm 28 .

[0046] The beam of radiation 22 branched off into the reference arm 24 irradiates a mirror 30 which reflects the beam of radiation 2...

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Abstract

A spectroscopic instrument (38) includes a first optical component (48) for spatial spectral splitting of a polychromatic beam of light (46) impinging onto the first optical component (48), an objective (50), which routes various spectral regions (B1, B2, B3) of the split beam of light (46a, 46b, 46c) onto differing spatial regions (52a, 52b, 52c), and a sensor (54), situated downstream of the objective (50) in the beam path of the beam of light (46a, 46b, 46c), with a plurality of light-sensitive sensor elements (54a, 54b, 54c). The sensor elements (54a, 54b, 54c) are arranged in the beam path of the split beam of light 46a, 46b, 46c in such a manner that each sensor element (54a, 54b, 54c) registers the intensity of a spectral sector (A1, A2, A3) of the beam of light (46) and the medians (Mk1, Mk2, Mk3) of the spectral sectors (A1, A2, A3) are situated equidistant from one another in the k-space, where (k) denotes the wavenumber.

Description

technical field [0001] The present application relates to a spectroscopic instrument (in particular an imaging system for a spectroscopic instrument), a system for optical coherence tomography and also to a method of spectroscopic analysis. Background technique [0002] Optical coherence tomography (OCT for short) is used for two-dimensional and three-dimensional (2D and 3D for short) structural inspection of samples. In so-called spectral-domain OCT (shortly SD OCT) or so-called frequency-domain OCT (shortly FD OCT), light beams whose spectrum is broadband (ie polychromatic) are spectroscopically analyzed. For this, spectroscopic instruments are put into operation. The light beam is coupled into the spectroscopic instrument where it is spectrally separated and the spectral intensity distribution (spectrum) I is recorded with the aid of a sensor with a plurality of sensing elements. From this spectral intensity distribution I, the spatial structure of the examined sample c...

Claims

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Application Information

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IPC IPC(8): G01J3/28
CPCG01B9/02091G01J3/2803G01J3/45G01J3/0208G01J3/14G01J2003/1208G01J3/28
Inventor 克劳迪娅·格舍博特托比亚斯·热格洛茨奥勒·马索亨宁·威斯维克劳斯·沃格勒
Owner WAVELIGHT GMBH
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