Liquid Light Guides
Close-Up of Liquid Light Guide End
Thorlabs' Liquid Light Guides (LLGs) offer outstanding transmission from 340 - 800 nm for white light illumination applications. For large core diameters, liquid light guides are a more efficient transmission solution than fiber bundles as they eliminate the packing fraction loss (dead space) that fiber bundles have. These light guides are recommended for use with tungsten halogen, xenon, or metal halide light sources and can be mounted to an optical breadboard by using one of our VH1 V-Mounts, a Ø1/2" (12.7 mm) post, and post holder. The Ø3 mm and Ø5 mm light guides can also be mounted to SM1-threaded (1.035"-40) components using the adapters sold below.
These liquid light guides are offered from stock in lengths of 4', 6', and 8' with a core diameter of either 3 or 5 mm, and their long-term temperature range is -5 to 35 °C. LLGs with custom lengths are also available as made-to-order items by contacting Technical Support.
Thorlabs also offers microscope collimation adapters for the Ø3 mm and Ø5 mm liquid light guides. These adapters allow the LLGs to be directed into the illumination ports used by various microscope manufacturers. For more information, please see below.
All transmission data presented here is typical. The maximum variation from lot to lot is ±5%. As a function of length, only minimal variations (<5%) are expected between our 4' (1.2 m), 6' (1.8 m), and 8' (2.4 m) long liquid light guides.
The shaded regions in the graphs below denote the spectral range over which we recommend using these liquid light guides.
Liquid Light Guide Dimensions
The drawing and photograph below illustrate the dimensions given in the table above. 180 ± 0° indicates the flatness tolerence between the metal and black material in the segment labled I2.
Cleaning the Optical End Faces
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These Liquid Light Guide Adapters allow the integration of our Ø3 mm and Ø5 mm liquid light guides into any of our selection of SM1-threaded (1.035"-40) components, such as fixed optic mounts, kinematic optic mounts, and lens tubes. The liquid light guide is secured with a nylon-tipped setscrew using a 5/64" hex key (found in the CCHK kit).
Thorlabs offers collimation adapters with AR-coated aspheric condenser lenses (EFL = 40 mm) for collimating the output from our High Power Light Sources. Four different collimator housings are available; each is designed to mate to the illumination port on an Olympus IX/BX, Leica DMI, Nikon Eclipse, Zeiss Axioskop, or Nikon Eclipse Ti microscope.
These adapters quickly mount onto the end of either the Ø3 mm or Ø5 mm Liquid Light Guide (LLG). The LLG is secured via a setscrew into the back of the collimator. The addition of these adapters allows the user to incorporate our HPLS200 series lamps into a microscope illumination port.
|AR Coating||350 nm - 700 nm|
|Focal Length||40.00 mm ± 5%|
|Surface Quality||60-40 Scratch-Dig|
|Olympus BX & IX|
|Nikon Eclipse Ti
(Click to Enlarge)
|LLG Diameter||3 mm||5 mm||3 mm||5 mm||3 mm||5 mm||3 mm||5 mm|