DD226962B1 - OPTICAL SYSTEM FOR ECHELLE SPECTROMETERS - Google Patents
OPTICAL SYSTEM FOR ECHELLE SPECTROMETERS Download PDFInfo
- Publication number
- DD226962B1 DD226962B1 DD26478984A DD26478984A DD226962B1 DD 226962 B1 DD226962 B1 DD 226962B1 DD 26478984 A DD26478984 A DD 26478984A DD 26478984 A DD26478984 A DD 26478984A DD 226962 B1 DD226962 B1 DD 226962B1
- Authority
- DD
- German Democratic Republic
- Prior art keywords
- echelle
- grating
- collimator
- camera
- echelle grating
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims description 9
- 239000006185 dispersion Substances 0.000 claims description 13
- 201000009310 astigmatism Diseases 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- 230000004075 alteration Effects 0.000 claims 5
- 230000003595 spectral effect Effects 0.000 claims 3
- 206010073261 Ovarian theca cell tumour Diseases 0.000 claims 2
- 208000001644 thecoma Diseases 0.000 claims 2
- 206010010071 Coma Diseases 0.000 claims 1
- 230000002349 favourable effect Effects 0.000 claims 1
- 238000003384 imaging method Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 238000010183 spectrum analysis Methods 0.000 claims 1
- 239000013256 coordination polymer Substances 0.000 description 2
- 101700004678 SLIT3 Proteins 0.000 description 1
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 1
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 1
- 102100027339 Slit homolog 3 protein Human genes 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/18—Generating the spectrum; Monochromators using diffraction elements, e.g. grating
- G01J2003/1828—Generating the spectrum; Monochromators using diffraction elements, e.g. grating with order sorter or prefilter
Description
Für die Astigmatismuskompensation muß der Abstand des sagittalen Spaltes vom KollimatorspiegelFor astigmatism compensation, the distance of the sagittal gap from the collimator mirror
,22
v=X Rcos 0. v = X Rcos 0.
(cos oC/cos ß)'(cos oC / cos ß) '
2 22 2
(cOSiX-/cOfc ß) · COS(cOSiX- / cOfcβ) · COS
betragen. Zur Trennung von sich überlagernden Echelle-Ordnungen bei Verwendung eines großen Wellenlängenbereiches wird ein Dispersionsprisma vor dem Echelle-Gitter angeordnet, das in doppeltem, möglichst symmetrischem Durchgang, arbeitet. Der außeraxiale Winkel Θ an den Spiegeln wird so gewählt, daß sich die Begrenzung des zweidimensionalen Spektrums so eng wie möglich neben der Prismakante befindet.be. In order to separate overlapping echelle orders when using a large wavelength range, a dispersion prism is placed in front of the echelle grating, which operates in a double, symmetrical, as much as possible passage. The off-axis angle Θ on the mirrors is chosen so that the boundary of the two-dimensional spectrum is as close as possible to the prism edge.
Die Erfindung soll anhand eines in der Zeichnung dargestellten Beispieles näher erläutert werden.The invention will be explained in more detail with reference to an example shown in the drawing.
In Figur ist das erfindungsgemäße System schematisch dargestellt.In Figure the system according to the invention is shown schematically.
Von einer Lichtquelle 1 ausgehendes Licht durchsetzt am Mittelpunkt Aden sagittalen Eintrittsspalt 2.Light emanating from a light source 1 passes through the sagittal entrance slit 2 at the center Aden.
Weiter wird der nachgeordnete tangentiale Eintrittsspalt 3 durchdrungen, und das Licht tritt im Scheitelpunkt B auf den Kollimatorspiegel 4 mit dem Radius Rv Das reflektierte Licht durchsetzt in den Punkten P1, P2 das Dispersionsprisma 8 und fällt unter dem Einfallswinkel im Punkt C auf den Mittelpunkt des Echelle-Gitters 7. Der Lichtstrahl wird unter dem Beugungswinkel ß vom Echelle-Gitter 7 abgelenkt und durchsetzt in den Punkten P3, P4 erneut das Dispersionsprisma 8. Danach tritt das Licht im Scheitelpunkt D auf den Kameraspiegel 5 mit dem Radius R2 und erzeugt nach Reflexion in der Fokalebene 6 einen herausgegriffenen Mittelpunkt E des Spektrums. Der Lichtstrahl wird unter einem außeraxialen Winkel O1 am Kollimatorspiegel 5 reflektiert.Further, the subordinate tangential entrance slit 3 is penetrated, and the light occurs at the vertex B on the collimator mirror 4 with the radius Rv The reflected light passes through the dispersion prism 8 at the points P 1 , P 2 and falls at the point of incidence at the point C to the center of the echelle grating 7. The light beam is deflected by the echelle grating 7 at the diffraction angle β and again penetrates the dispersion prism 8 at the points P 3 , P 4. Thereafter, the light at the vertex D passes onto the camera mirror 5 with the radius R 2 and, upon reflection in the focal plane 6, produces an extracted center E of the spectrum. The light beam is reflected at an off-axis angle O 1 on the collimator 5.
Das beschriebene optische System ist überdies auch für Plangittersysteme anwendbar.The described optical system is also applicable to Plangittersysteme.
Der erfindungsgemäße Aufbau wird in folgender Konfiguration realisiert:The structure according to the invention is realized in the following configuration:
R1 = R2 = 1 002 mm O1=Q2 = 7,46°R 1 = R 2 = 1 002 mm O 1 = Q 2 = 7.46 °
AB = 506,25 mm a = 68,23°AB = 506.25 mm a = 68.23 °
BP1 = DP4 = 473 mm ß = 60,33° CP2 = CP3 = 67 mmBP 1 = DP 4 = 473 mm β = 60.33 ° CP 2 = CP 3 = 67 mm
Die Fokalebene 6 ist um 5,2° senkrecht zur Dispersionsebene des Echelle-Gitters 7 gedreht. Das Prisma 8 ist so angeordnet, daß für die Wellenlänge, die die geometrische Mitte von 6 in B trifft, symmetrischer Strahlverlauf am Prisma 8 sowohl in der Dispersionsebene von Gitter 7 als auch in der senkrecht dazu stehenden Dispersionseinrichtung des Prismas 8 erzielt wird. Das optische System istfüreinen Wellenlängenbereich von 190-850 nm ausgelegt, wobei für den Bereich 190-370 nm eine Auflösung 0,01 nm und für den Bereich 370-850 nm eine Auflösung 0,05nm erreicht wird.The focal plane 6 is rotated by 5.2 ° perpendicular to the dispersion plane of the echelle grating 7. The prism 8 is arranged so that for the wavelength that meets the geometric center of 6 in B, symmetrical beam path at the prism 8 in both the dispersion plane of grating 7 and in the perpendicular thereto dispersion device of the prism 8 is achieved. The optical system is designed for a wavelength range of 190-850 nm, with a resolution of 0.01 nm being achieved for the range 190-370 nm and a resolution of 0.05 nm for the range 370-850 nm.
Claims (2)
Sie verschwindet fürThe invention has for its object to provide an optical structure for an echelle spectrometer, in which the state of least aberrations, in particular coma and astigmatism, is achieved for the given spectral range in the closest geometrically possible arrangement of the optical components. This object is achieved by an optical system for Echelle spectrometer according to the invention in that the arrangement of the optical components to minimize aberrations met certain geometric conditions. Collimator and camera mirrors are concave mirrors whose vertices are in the dispersion plane of the echelle grating, the dispersion plane being the plane perpendicular to the grating grooves through the center of the grating surface. Collimator and camera mirrors are equidistant from the echelle grating at a minimum distance from each other to provide only a small deviation from the autocollimation event at the grating for high grating effectiveness. The deflection of the principal rays at the vertices of the collimator and camera mirrors occurs in planes perpendicular to the dispersion plane of the Echelle grating. The entrance slits and the center of the spectrum are each on the opposite side of the dispersion plane of the Echelle grating. The coma no longer depends on the incidence and diffraction angle on the Echelle grating as in Czerny-Turner arrangements.
She disappears for
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD26478984A DD226962B1 (en) | 1984-07-02 | 1984-07-02 | OPTICAL SYSTEM FOR ECHELLE SPECTROMETERS |
DE19853516183 DE3516183A1 (en) | 1984-07-02 | 1985-05-06 | OPTICAL SYSTEM FOR SPECTRAL DEVICES |
US06/744,861 US4690559A (en) | 1984-07-02 | 1985-06-14 | Optical system for spectral analysis devices |
FR858509825A FR2566902B1 (en) | 1984-07-02 | 1985-06-27 | OPTICAL SYSTEM FOR SPECTROSCOPE |
GB08516395A GB2163567B (en) | 1984-07-02 | 1985-06-28 | Optical system for spectral analysis devices |
CH2809/85A CH668126A5 (en) | 1984-07-02 | 1985-07-01 | OPTICAL SYSTEM FOR SPECTRAL DEVICES. |
JP60145664A JPS6156921A (en) | 1984-07-02 | 1985-07-02 | Optical system for spectrum analyzer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD26478984A DD226962B1 (en) | 1984-07-02 | 1984-07-02 | OPTICAL SYSTEM FOR ECHELLE SPECTROMETERS |
Publications (2)
Publication Number | Publication Date |
---|---|
DD226962A1 DD226962A1 (en) | 1985-09-04 |
DD226962B1 true DD226962B1 (en) | 1987-05-06 |
Family
ID=5558458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DD26478984A DD226962B1 (en) | 1984-07-02 | 1984-07-02 | OPTICAL SYSTEM FOR ECHELLE SPECTROMETERS |
Country Status (1)
Country | Link |
---|---|
DD (1) | DD226962B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10011462C2 (en) * | 2000-03-10 | 2002-05-08 | Ges Zur Foerderung Angewandter Optik Optoelektronik Quantenelektronik & Spektroskopie Ev | Optical spectrometer with astigmatism compensation |
-
1984
- 1984-07-02 DD DD26478984A patent/DD226962B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
DD226962A1 (en) | 1985-09-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RPI | Change in the person, name or address of the patentee (searches according to art. 11 and 12 extension act) | ||
ASS | Change of applicant or owner |
Owner name: CARL ZEISS JENA GMBH Effective date: 19921019 |
|
IF04 | In force in the year 2004 |
Expiry date: 20040703 |