UV lens provided for nuclear viewing device
A
Resolve Optics product story
Edited by the Engineeringtalk editorial team
May 4, 2007
Resolve Optics' UV-Zoom lens was designed and wavelength corrected to view a nuclear fuel assembly situated 13m away from the lens and through 10m of water.
Resolve Optics was selected by Channel Systems (Pinawa, Canada) to design and develop a high-performance ultraviolet transmitting zoom lens with a focal length of 80 - 200mm for use in the Digital Cerenkov Viewing Device (DCVD).
The DCVD is the newest generation of imaging devices for nonintrusive verification of spent nuclear fuel.
Inspectors for the nuclear industry are responsible in part for the regulation of nuclear materials to ensure that they are not being diverted for clandestine purposes.
Spent nuclear fuel emits a faint ultraviolet Cerenkov light when gamma rays from fuel assemblies interact with electrons in the cooling pond water.
The DCVD is a highly-effective instrument that captures the Cerenkov image of spent fuel for analysis and comparison.
This instrument provides inspectors with an effective tool to differentiate irradiated fuel items from nonfuel items.
The UV-Zoom lens was designed and wavelength corrected to view a nuclear fuel assembly situated 13m away from the lens and through 10m of water.
To meet the challenges of the application the UV-Zoom lens was designed to optimally operate from 10 to 55C.
Miniature motors allow accurate remote setting of both zoom and focus functions.
A filter slide was incorporated in the design, enabling the lens to be switched between UV (270 to 350nm) and visible (400 to 700nm) without the need to refocus the lens.
By using a telescopic focus the lens is able to image objects from 3m to infinity.
The lens achieves high image resolution with low distortion throughout the zoom range without refocusing (image tracking).
Top-siding adjustment was provided on the lens so that the motor cables could be conveniently positioned.
A lockable C mount ensures the lens cannot come loose during operation.
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