Description
The Enhanced Series VNIR objective fore lenses from Specim Spectral Imaging are optimized for the visible to near-infrared wavelength region, 400 – 1000 nm.
| Specifications | ||||
| Optical Characteristics | OLEWide* | OLE18 | OLE23 | OLE140 |
| Focal Length | 9 mm | 18 mm | 23 mm | 140 mm |
| F-number | 2.4 | 2.4 | 2.4 | 2.8 |
| Spatial Image Size (max) | 14.4 mm | 12.4 mm | 14.4 mm | 12.4 mm |
| RMS Spot Diameter | 14.8 µm | 17.4 µm | 15.4 µm | 10 µm |
| Transmission | > 85% | > 85% | > 85% | > 85% |
| Minimum Working Distance * | 30 cm | 30 cm | 30 cm | 10 m |
| Mechanical Characteristics | ||||
| Dimensions | 49 mm x Ø 47 mm | 48 mm x Ø 53 mm | 43 mm x Ø 41 mm | 162 mm x Ø 65 mm |
| Body Material | Anodized Aluminum | |||
| Mount | Standard C-mount | |||
* In this wide field-of-view lens the pixel size on the target increases towards the edges of the field of view due to spatial distortion, and thus the actual focal length depends on the spatial image size (detector size) used. Upon request, Middleton will provide the calibration file for the distortion in order to correct it in image processing.
| Dimensions of Imaged Line (LxW) at Select Working Distances (D) | |||||
| OLEWide | OLE18 | OLE23 | OLE140 | ||
| Field of View angle (degrees) ** | 26.8 | 21.7 | 3.6 | ||
| D = 100 mm [3.94 in] * | L= | — | — | 6.29 | |
| W= | — | — | 0.02 | ||
| D = 300 mm [11.81 in] | L= | 142.7 | 114.78 | 18.86 | |
| W= | 0.49 | 0.39 | 0.06 | ||
| D = 500 mm [19.69 in] | L= | 237.84 | 191.3 | 31.43 | |
| W= | 0.81 | 0.65 | 0.11 | ||
| D= 750 mm [29.53] | L= | 356.76 | 286.96 | 47.14 | |
| W= | 1.22 | 0.98 | 0.16 | ||
| D = 1000 mm [39.37] | L= | 475.68 | 382.61 | 62.86 | |
| W= | 1.62 | 1.3 | 0.21 | ||
| D= 1500 mm [59.06] | L= | 713.51 | 573.91 | 94.29 | |
| W= | 2.43 | 1.96 | 0.32 | ||
| D = 2000 mm [78.74 in] | L= | 951.35 | 765.22 | 125.71 | |
| W= | 3.24 | 2.61 | 0.43 | ||
| D = 3000 mm [118.11 in] | L= | 1427.03 | 1147.83 | 188.57 | |
| W= | 4.86 | 3.91 | 0.64 | ||
| D = 1 km [3280 ft] *** | L= | 475.68 | 382.61 | 62.86 | |
| W= | 1.62 | 1.3 | 0.21 | ||
| VNIR Enhanced Lenses Ordering Information | ||
| Part number | Description | Product Name |
| MRC-308-002-07 | VNIR Enhanced, C-Mount Lens. 9 mm, f/2.4, C-mount, E-series, 400-1000nm | OLEWide |
| MRC-302-002-03 | VNIR Enhanced, C-Mount Lens. 18 mm, f/2.4, C-mount, E-series, 400-1000nm | OLE18 |
| MRC-302-002-04 | VNIR Enhanced, C-Mount Lens. 23 mm, f/2.4, C-mount, E-series, 400-1000nm | OLE23 |
| MRC-302-002-05 | VNIR Enhanced, C-Mount Lens. 140 mm, f/2.4, C-mount, E-series, 400-1000nm | OLE140 |
