A detailed understanding of the nature of light was not needed for the development, beginning in the 1600s, of a practical science of optics and optical instrument design.
I can see no very great difficulty (not more than in the case of many other structures) in believing that natural selection has converted the simple apparatus of an optic nerve merely coated with pigment and invested by transparent membrane, into an optical instrument as perfect as is possessed by any member of the great Articulate class...
His observatory was in Slough, and it was his optical instrument through which Haydn peered.
He studied at the University of Manchester and worked for a time in his family's optical instrument business.
The Barlow lens has come into general use for increasing the eyepiece power of any optical instrument.
In 1830 he began grinding his own lenses, developing techniques that he taught to optical instrument makers in London.
Binocular, optical instrument, usually handheld, for providing a magnified stereoscopic view of distant objects, consisting of two similar telescopes, one for each eye, mounted on a single frame.
In February, NIF fired its 192 beams into its target chamber for the first time, and it now has the world's most powerful laser, as well as the largest optical instrument ever built.
It reflects like an optical instrument and responds to changes in the weather so sensitively that it seems like a part of the sky rather than of the land.
Energetic visionaries Monumental Everyone says I sue you Sunny side up ReprintsPursuing this line of thought, Mr Herzog calls the house "an optical instrument" for viewing a "private and unprivate" collection.
The 1980s and '90s ushered in the era of laparoscopic surgery, in which a thin lighted optical instrument, similar to a small telescope, is used to examine abdominal and thoracic (chest) cavities.
