You'll recognize these flying fishbowls as 
bombsight windows. Specifications require that 
these hyperhemisphere lenses be ground to 
precision tolerances of fractions of a wavelength 
of light. Bausch & Lomb optical competence 
made volume production possible ... by new 
adaptation of diamond cutting wheels, 
ring-shaped laps, and induction-heat blocking. 
Find out how B&L advance technology can 
help expedite your contract plans. 
WRITE FOR COMPLIMENTARY 
COPY OF LIMITED EDITION, 
“OPTICAL COMPETENCE” 
(on official letterhead, please; 
indicate title). Bausch & Lomb 
Optical Co., 86457 St. Paul St., 
Rochester 2, New York. 
America s only complete optica- source, from piass to finished product 
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