Description
Collimating lenses are optical lenses that make parallel the light beams that enter your spectrometer setup. These lenses allow users to control the field of view, collection efficiency and spatial resolution of their setup, and to configure illumination and collection angles for sampling.
Ocean Insight collimating lenses can be attached to the spectrometer, coupled to optical fibers, or integrated into sampling accessories. Most lenses have an inner barrel threaded for SMA 905 connectors. The inner barrel slides relative to the lens fixture for adjusting the focus; a setscrew secures the barrel.
Specialty lens – model 74-UV-HT-VAC for high temperature, high pressure vacuum applications
Temperature-rated – conditions up to 250 °C (lens assembly only)
Rugged – stainless steel barrel with black oxide finish
Fiber optic – couple to optical fibers or spectrometers
Adjustable – position lenses for converging to diverging FOV (~25°)
| 74-ACR | 74-DA | 74-UV | 74-UV-HT-VAC | 74-VIS | 84-UV-25 | |
| Connects To | Optical fiber | Spectrometer | Optical fiber | Optical fiber | Optical fiber | Optical fiber |
| Lens Material | f/2 BaF10 and FD10 fused silica |
f/2 fused silica Dynasil |
f/2 fused silica Dynasil | f/2 fused silica Dynasil | f/2 BK-7 glass | f/4 fused silica Dynasil |
| Type | Achromatic doublet | Single lens direct-attach |
Single lens | Single lens | Single lens | |
| Wavelength Range | 350nm - 2.5μm | 200nm - 2.5μm | 185nm - 2.5μm | 190nm - 2.5μm | 350nm - 2.5μm | 185nm - 2.5μm |
| Connector | SMA 905 6.35 mm ferrule |
SMA 905 | SMA 905 6.35 mm ferrule |
SMA 905 6.35 mm ferrule |
SMA 905 6.35 mm ferrule |
|
| Connector Threads | 3/8-24 external thread | 3/8-24 external thread 1/4-36 internal thread |
3/8-24 external thread | 3/8-24 external thread |
3/8-24 external thread |
1/4-36 external thread |
| Diameter | 5 mm | 5 mm | 5 mm | 5 mm | 5 mm | 25.4 mm |
| Focal Length Specification | 10 mm | 10 mm | 10 mm | 10 mm | 10 mm | 100 mm |
| Operating Temperature | 150° C | 150° C | 150° C | 250° C | 150° C | 70° C |
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