In it they gave no documentary evidence of optical instruments.

He decided that for such detailed work, they may have had optical instruments.

It was forbidden to use optical instruments for the time being.

Many new optical instruments with medical applications were invented during the 19th century.

This level of magnification shows the eye as an optical instrument.

This business was soon converted to the manufacture of optical instruments.

A number of pieces from his optical instrument collection were placed on display there.

In the second main sections, the results obtained are applied to optical instruments.

The 94-inch optical instrument would be the largest orbiting telescope.

These are used as beam splitters in many optical instruments.

A total station is an electronic/optical instrument used in modern surveying.

A microscope is an optical instrument which makes small objects visible to the human eye.

Chrétien was working at the time on calculations for optical instruments.

He was known in his time, and is remembered today, for the high quality of his optical instruments.

No optical instrument would give him that degree of accuracy.'

When she opened her eyes again, each of them confronted what appeared to be a tiny optical instrument no more than an inch away.

Stations were equipped with radar, optical instruments, and communications systems.

Failure of the system can lead to contamination of optical instruments.

The sextant, an optical instrument, is used to perform this function.

The first questions Wien asked were related to the resolving power of optical instruments.

They sold mathematical, physical and optical instruments, particularly glasses.

It makes machinery, optical instruments and control systems.

He studied at the University of Manchester and worked for a time in his family's optical instrument business.

They had optical instruments, and took various spectroscopic readings.

A telescope is an optical instrument which enlarges the images of distant objects.