1240-12-145-9171

333004-9353.000 1255-35300 Different types of items having a common mounting or mounted on each other
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1240-12-305-9780 1240123059780 123059780 is an item specifically designed to hold and/or position a mirror(s), prism(s), reflector(s), or the like, in an optical system. excludes cell, optical element; holder, mirror and holder, reflector.

1240-12-305-9916 1240123059916 123059916 is a color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. this item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.

1240-12-305-9915 1240123059915 123059915 is a light transmitting item consisting of a transparent, flat glass body having two plane-parallel surfaces, either with only nonabsorbing dielectric coatings or absorbing and nonabsorbing coatings of a thickness nearly equivalent to the wavelength of the transmitted light. interference begins at the thin bordering surfaces of the coatings, the penetrating light waves being superimposed on the reflected light waves. the item can be installed in various optical insturments, to serve as an eye protecting device.