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Optical Diagnostics T. Tsang BNL (Aug. 4, 2006)

Explore optical diagnostic techniques in challenging environments with passive components and retroreflected illumination. Sumitomo and Fujikura fibers offer durable imaging solutions for tight containment setups. Optimize image quality and performance with state-of-the-art optical design and components. Test dynamic image collection using SMD and FastVision cameras.

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Optical Diagnostics T. Tsang BNL (Aug. 4, 2006)

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  1. Optical Diagnostics T. Tsang BNL (Aug. 4, 2006)

  2. Optical Diagnostics • tight environment • high radiation area • non-serviceable area • passive components • optics only, no active electronics • transmit image through flexible fiber bundle

  3. Optical Diagnostics retroreflected illumination Spherical mirror laser illumination image collection cm scale Works OK in this tight environment test target

  4. Optical Diagnostics optical design in secondary containment One set of optics per viewport Conceptual design completed

  5. Sumitomo imaging fibers – used in oue setup Rad-hard to 1 Mrad IGN-08/30 sample 0.3-meter 30,000 pixels

  6. Fujikura imaging fibers – Not used Fujikura data, FIGH-30 A continuous 20-meter fiber 30,000 pixel imaging fiber illumination uniformity unofficial price info official price info image after a continuous 20-meter long fiber

  7. Image quality comparison 30,000 pixels, 1-mm diameter 25 cm long 30 cm long Fujikura Sumitomo FIGH-30-850N IGN-08/30 $210/foot delivery in 3 months $78/foot delivery in 4 weeks NO significant difference in image quality Should go with Sumitomo fibers (20 meters have been ordered) camera SMD illumination NIR pulse, 10 us/frame

  8. All-in-one optical setup Grin objective lens imaging fiber – 1 mm illumination fiber fiber holder

  9. Sumitomo IGN08/30 imaging fiber – 20-meter long July 2006 NIR 100 µs/frame static image 50 x 800 x

  10. New baseplate on mock-up – SMD camera mock-up primary SMD camera one set of viewport optics 25 Watt pulsed NIR laser illumination fiber imaging fiber stationary image dynamic image SMD camera: NIR pulse 100 µs/frame

  11. New baseplate on mock-up – FastVision camera stationary image dynamic image FastVision camera: NIR pulse 2 ms/frame

  12. Summary • 10-meter imaging fibers will be assembled on mock-up primary • dynamic image collection on both viewports will be tested • 1st camera will be SMD CCD • 2nd camera will be FastVision CCD • 2 sets of viewport/optics/CCD will be ready by the end of August • 3 more 10-meter long imaging fibers in order – viewports 3rd & 4th

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