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objective lens

   Also found in: Dictionary/thesaurus, Legal, Financial, Encyclopedia, Wikipedia 0.01 sec.
objective lens,
a lens that accepts light from the output phosphor of a radiographic image-intensifier tube and converts the light into a parallel beam for recording an image on film.


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By rotating the nosepiece, you can select which objective lens to use.
The second number being 35 in this case is the diameter of the objective lens (the big one facing the object being looked at) in millimeters.
Later research into this effect revealed a surprising result, that is, the high reduction of the chromatic aberration of a single plano-convex objective lens by placing an achromatic doublet lens at some position along the focal length, and inside the prime focus itself.
 
 
 
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