Concave Holographic Gratings for Flat-Field Spectrographs
Concave Holographic Gratings for Flat-Field Spectrographs
Aberration corrected flat field gratings are designed to focus a spectrum on a plane surface, making them ideal for use with linear or 2-D array detectors. These gratings are computer-optimized to form near-perfect images of the entrance slit on the detector plane. The relative location of grating to detector is kept fixed.
Catalog
Number
Grooves
(l/mm)
Spectral Region
(nm)
Spectrum Length
(mm)
Ruled Area
(H×W mm2)
α
La
(mm)
Lb1
(mm)
Lb2
(mm)
Lh
(mm)
β1
β2
βh
H21-001
489.86
200-800
25.32
30×30
-6.65°
77.36
66.98
78.00
64.27
12.35°
30.52°
-4.00°
H21-002
454.31
285-720
25.39
60
-11.30°
130.00
130.00
128.00
127.97
3.80°
-7.60°
-6.34°
H21-003
217.15
400-950
20.15
50
-2.50°
84.90
85.67
111.55
64.00
7.50°
14.48°
-40.51°
Concave Holographic Gratings for Flat-Field Spectrographs
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