UV Condensers

The UV condensers are simple chromatic objectives (made from fused silica) for the collection of light or for the imaging of light sources. A typical application e.g. would be to focus light from a sample to a spectrograph slit. For this purpose they feature an intermediate imaging quality and are optimized for high aperture angles.

4 lens UV condenser with 70 mm focal length - free aperture 54 mm

This condenser is designed for a magnification ratio M = β' = -5 (magnification 5) and is made from synthetic fused silica. It can however also be used for collimation or other, similar magnification ratios. The magnification ratio β' = -5 is achieved with about 533 mm distance between object and image. For different wavelengths the chromatism makes necessary a refocusing which can be done by just moving the objective (without need to alter the distance object to image).
The focal length is 70 mm at about 248 nm. At this wavelength the wavefront error is about 3 Lambda, the spot diameter is about 40 µm (measured in the enlarged image) with optimal focusing for 90 % objective diameter resp. about 100 µm with optimal focusing for full diameter (full diameter of the Airy disc about 5.6 µm, for comparison).
We have available for this condensors a drawing of the holder dimensions with some additional data about integration and a table about refocusing. 
 → OUK 70.54

3 lens UV condenser with 60 mm focal length - free aperture 50 mm

This condenser is designed for collimation (infinite magnification) and is made from synthetic fused silica. It can however also be used for finite magnification ratios. It is not color corrected. The focal length f = 60 mm is a nominal value, at 248 nm the focal length is about 51 mm. At this wavelength the wavefront error is about 10 to 20 Lambda, the spot diameter is about 20 µm (measured in the object) with optimal focusing for 90 % objective diameter resp. about 40 µm with optimal focusing for full diameter (full diameter of the Airy disc about 0.7 µm, for comparison).
We have available for this condensors a drawing of the holder dimensions with some additional data about integration. → OUK 60.50

Available on special order

• These condensers can be AR coated for single wavelengths or wavelength ranges → on request
• Other focal lengths or diameters → on request
• Larger aperture angles → on request
• Achromatic condensers → on request