OPTICAL LENS MACHINERY NAMELY

Brand	Owner	Address	Description
AO	AMERICAN OPTICAL COMPANY	SOUTHBRIDGE MA	OPTICAL LENS MACHINERY-NAMELY, LENS DRILLS, BROACHING MACHINES, LENS CHILLERS, LENS MARKERS, LENS BLOCKERS, LENS EDGERS, LENS SURFACERS, LENS POLISHERS LENS CUTTERS, LAP TRUING MACHINES, SOLDERING MACHINES, ACCESSORIES AND PARTS FOR THE AFORESAID MACHINES AND DEVICES; SMALL HAND TOOLS GENERALLY USED IN THE OPTICAL AND OPHTHALMIC TRADES, SUCH AS PLIERS, SCREW DRIVERS, MANDRELS, FRAME STRETCHERS, AUXILIARY HEATERS FOR FRAME STRETCHERS, PROTRACTORS, AND THE LIKE; BENCHES GENERALLY USED WITH OR FOR SUCH MACHINES;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

At least one exemplary embodiment is directed to a zoom lens system, which can have a diffractive optical element, achieves high optical performance over a wide zoom range. The zoom lens system includes a first lens unit having positive optical power, a second lens unit having negative optical power, and a rear lens component including at least one lens unit having positive optical power. The first lens unit, the second lens unit, and the rear lens component are arranged in that order from an object side towards an image side of the zoom lens system. The diffractive optical element is included in the first lens unit. The rear lens component is provided with a positive lens element having extraordinary dispersion characteristics.