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Lenses and Filters

For close range measurements (<50m for Classical HySpex and <20m for Mjolnir cameras), a close-up lens is required.

To maintain the optical performance of the cameras, dedicated close-up lenses are required. These are easily mounted on the HySpex camera.

For Mjolnir, 1m working distance/20° FOV lenses are available.

For HySpex Classic, close-up lenses are available for a working distance of a few cm, giving up to 24µm resolution for VNIR-1800, 53µm for SWIR-384 and 32µm for SWIR-640 , and up to 50m working distance. The main lens specifications are given in the table below for VNIR-1800, SWIR-384 and SWIR-640:

VNIR-1800

Working distance 0.3 m 1 m 3 m 9-13 m 13-23 m 23-50 m
Linear FOV [mm] 86 288 864 2592 – 3744 3744 – 6624 6624 - 14400
Pixel size across-/
along-track [mm]

0.05/0.1

 0.16/0.32 0.48/0.96 1.44-2.08/
2.88-4.16		 2.08-3.68/
4.16-7.36		 3.68-8/
7.36-16

SWIR-384

Working distance

0.3 m

1 m

3 m

9-50 m

Linear FOV [mm]

84

280

841

2523 - 14016

Pixel size across-/
along-track [mm]

0.22/0.22

0.73/0.73

2.19/2.19

6.57-36.5 / 6.57-36.5

SWIR-640

Working distance

0.3 m

1 m

3 m

9-50 m

Linear FOV [mm]

84

280

841

2523 - 14016

Pixel size across-/
along-track [mm]

0.13/0.13

0.44/0.44

1.31/1.31

3.94-21.9 / 3.94-21.9