Spectrometers> Imaging Spectrometers
Description
Imaging spectrometers enable the acquisition of a spectrally resolved image of a two dimensional scene. P&P imaging spectrometers are designed to allow simultaneous collection of data along a length of a thin slit. As the slit scans across a scene, multiple images are taken to stitch together a hyperspectral image. The advantage of such system is that all spectral data for a given point is collected at one time, and that it provides very highly spectrally resolved images (down to 0.3 nm resolution). Furthermore, with the exceptional optical design, P&P Optica's imaging spectrometers also provide excellent spatial resolution determined by the pixel size of the detector used.
The image below shows a spectrally resolved image of a slit positioned along the length of a mercury spectral lamp. As can be seen, intensity and spectral variations exist along the lamp.
P&P Optica imaging spectrometers can be easily adapted to fit most standard microscopes. This can be done by either attaching the spectrometer to a camera port using our C-mount adaptor, or by attaching fiber optic input to an SMA port available on many microscopes. When combined with a scanning stage, hyperspectral images can be obtained, as shown below.
Example hyperspectral images of a pollen grain. Over 1000 wavelenght dependent images were collected with a spectrometer mounted on a standard microscope.
More information regarding the design and performance of the P&P Optica line of spectrometers can be obtained in the following white paper: Multichannel Imaging Spectrometers.
Available Systems
| Product Name | Spectralrange [nm] | Slit length [mm] | Slit width1[µm] | Spectralres.2 [nm] | Spatialres.5[µm] | Bitdepth [bit] | Dynamic range | Frame rate [fps] | |
|---|---|---|---|---|---|---|---|---|---|
| From | To | ||||||||
| ISPPEC BB -4-1.4 7 |
380 |
1150 |
4 |
13 |
1.5 |
32 |
16 |
4,800 |
1.4 |
| ISPPEC UVI1-4-1.4-HS |
380 |
680 |
4 |
13 |
0.7 |
32 |
16 |
4,800 |
1.4 |
| ISPPEC VIS1-4-1.4-HS |
380 |
740 |
4 |
13 |
0.8 |
32 |
16 |
4,800 |
1.4 |
| ISPPEC VIS1-8-30 |
380 |
740 |
8 |
5 |
0.4 |
16 |
12 |
2,200 |
30 |
| ISPPEC VIS1-8-18 |
380 |
740 |
8 |
5 |
0.2 |
16 |
12 |
2,500 |
18 |
| ISPPEC VIS1-8-8 |
380 |
740 |
8 |
5 |
0.2 |
16 |
12 |
2,000 |
8 |
| ISPPEC VIS2-4-1.4-HS |
400 |
780 |
4 |
13 |
0.7 |
32 |
16 |
4,800 |
1.4 |
| ISPPEC VIS2-4-1.4-LN |
400 |
780 |
4 |
13 |
0.7 |
32 |
16 |
5,500 |
1.4 |
| ISPPEC VIS2-8-30 |
400 |
780 |
8 |
5 |
0.4 |
16 |
12 |
2,200 |
30 |
| ISPPEC VIS2-8-18 |
400 |
780 |
8 |
5 |
0.2 |
16 |
12 |
2,500 |
18 |
| ISPPEC VIS2-8-8 |
400 |
780 |
8 |
5 |
0.2 |
16 |
12 |
2,000 |
8 |
| ISPPEC VIR1-4-1.4-HS |
455 |
885 |
4 |
13 |
0.8 |
32 |
16 |
4,800 |
1.4 |
| ISPPEC VIR1-4-1.4-LN |
455 |
885 |
4 |
13 |
0.8 |
32 |
16 |
5,500 |
1.4 |
| ISPPEC VIR1-8-30 |
455 |
885 |
8 |
5 |
0.4 |
16 |
12 |
2,200 |
30 |
| ISPPEC VIR1-8-18 |
455 |
885 |
8 |
5 |
0.3 |
16 |
12 |
2,500 |
18 |
| ISPPEC VIR1-8-8 |
455 |
885 |
8 |
5 |
0.3 |
16 |
12 |
2,000 |
8 |
| ISPPEC VIR2-4-1.4-HS |
490 |
955 |
4 |
13 |
0.9 |
32 |
16 |
4,800 |
1.4 |
| ISPPEC VIR2-4-1.4-LN |
490 |
955 |
4 |
13 |
0.9 |
32 |
16 |
5,500 |
1.4 |
| ISPPEC VIR2-8-30 |
455 |
885 |
8 |
5 |
0.4 |
16 |
12 |
2,200 |
30 |
| ISPPEC VIR2-8-18 |
490 |
955 |
8 |
5 |
0.3 |
16 |
12 |
2,500 |
18 |
| ISPPEC VIR2-8-8 |
490 |
955 |
8 |
5 |
0.3 |
16 |
12 |
2,000 |
8 |
| ISPPEC -VIR4-4 |
575 |
1120 |
4 |
13 |
1.1 |
32 |
16 |
5,500 |
1.4 |
| ISPPEC NIR1-6 |
875 |
1700 |
5 |
34 |
5.2 |
53 |
12 |
1,000 |
50 |
| ISPPEC NIR1-8-12B |
875 |
1700 |
8 |
14 |
2.6 |
33 |
14 |
2,700 |
30 |
| ISPPEC NIR1-8-14B |
875 |
1700 |
8 |
14 |
2.6 |
33 |
14 |
2,800 |
120 |
| ISPPEC NIR3-5 |
1105 |
2155 |
5 |
21 |
6.6 |
40 |
14 |
4,000 |
100 |
| ISPPEC NIR3-6.8 |
1105 |
2155 |
6.8 |
34 |
8.2 |
53 |
16 |
1,200 |
100 |
| ISPPEC NIR3-6 |
1105 |
2155 |
6 |
5 |
3.3 |
24 |
16 |
6,000 |
120 |
| ISPPEC NIR4-5 |
1285 |
2500 |
5 |
21 |
6.6 |
40 |
14 |
4,000 |
100 |
| ISPPEC NIR4-6.8 |
1285 |
2500 |
6.8 |
34 |
8.2 |
53 |
16 |
1,200 |
100 |
| ISPPEC NIR4-6 |
1285 |
2500 |
6 |
5 |
3.3 |
24 |
16 |
6,000 |
120 |
1Maximum slit width for full spectral resolution.
2Highest spectral resolution achieved. Spectral resolution is determined by the slit width and instrument performance (such as here). Many systems on the market erroneously present spectral resolution as dispersion per pixel, giving misleading information.
3Spectral resolution achieved when fiber with 0.1mm core diameter is used instead of the slit.
4Number of bright fibers 0.12mm of external diameter separated by dark fibers of the same diameter (provides minimal crosstalk and optimal signal strength.) This can be doubled by reducing the collection fiber diameter to 0.06 mm. If crosstalk is acceptable, further channel increase is possible.
5The minimum distance between two bright points so that they are resolved as defined by the Releigh criterion.
6As obtained after performing a subtraction of noise averaged along a column.
7System without suppression of second order effects.
Technical Specifications
| Parameter | Value |
|---|---|
| size | 32cm L x 12cm W x 10 cm H |
| weight | typically <4 kg |
| F/number | F/3 |
| Spectral range (free of second order effects) | 90-95% of an octave in the 350 nm to 2500 nm range |
| Spot diameter | 19 µm @ 1000 nm in 25.4 x 9 mm2 area |
| Spectral resolution (0.024 mm wide pixels) | 0.5 nm @ 400 nm and 2 nm @ 2000 nm |
| Linear dispersion | 90%-95% of an octave per inch |
| Maximum detector size | 25.4 x 12.7 mm |
| Dynamic range of a single 0.024 by 0.024 mm2 pixel | > 3,000 (depends on detector used) |
