Zygo Corp. in Middlefield restored second-quarter profitability from its core business making optical instruments used to measure extreme tolerances in the production of semiconductors and life-sciences and industrial equipment.
Zygo earned $5.8 million, or 32 cents a share, in the three months ended Dec. 31. That compares to loss of $1.3 million, or 7 cents a share, the same period in 2009.
Second-quarter revenues climbed 38 percent to $36.1 million from $26.1 million during the same period in the prior year.
President and CEO Chris Koliopoulos noted Zygo’s were strong – up 29 percent — even before counting sales from its  Richmond, Calif., acquisition  of a precision-optics manufacturing operation from Dutch lithography giant ASML.
The new Zygo Richmond optics operation contributed an additional $2.5 million in revenues in the quarter, Koliopoulos said.
