Optical microscope for nuclear emulsion readout: system design and results in application

Details Optical microscope for nuclear emulsion readout: system design and results in application Optical microscope for nuclear emulsion readout: system design and results in application

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spie.3779..303w&link_type=abstract

Proc. SPIE Vol. 3779, p. 303-312, Current Developments in Optical Design and Optical Engineering VIII, Robert E. Fischer; Warren

Computer Science

Scientific paper

Experiments such as CHORUS at CERN require the inspection of a large amount of nuclear emulsion plates exposed to particle beams. Rare events need to be found, measured and analyzed. Their features are stored as grains in microscopic dimensions in a 3D stack of plates. A new, fully automatic immersion microscope system was developed for this purpose. It features high resolution, small depth of focus, large working distance, large field of view and synchronization of illumination and detector. An additional requirement is given by variations in the refraction index and in the relative thickness of immersion oil and emulsion. The approach used here is an imaging system based on a various objective lens with extreme numerical aperture, large working distance and wide field, combined with a matched high-aperture Koehler illuminator. The light source is a mercury arc lamp, combined with a filter package for the g- line. It includes liquid crystal elements for synchronized shuttering and variable attenuation. The theoretical resolution is less than 1 micron in x, y, z within a volume of 0.5mm diameter times 1 mm scanning depth in all situations within a predefined index range. Three identical pieces of the system have been built. The identical pieces of the system have been built. The experimentally measured resolution confirms the expectations and is better than 1 micron in all three dimensions. This is the result of a complex process of system design and manufacturing, unifying optical, opto-mechanical and opto-electronical contributions. This process spans from the early stages of feasibility and manufacturing up to the test and adjustment procedures. The three prototypes are operational since the fall of 1998 in the frame of the CHORUS project. Practical experience and application results are presented.

Affiliated with

Also associated with

No associations

Rating

Optical microscope for nuclear emulsion readout: system design and results in application does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Optical microscope for nuclear emulsion readout: system design and results in application, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical microscope for nuclear emulsion readout: system design and results in application will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1545806