Zygo Corp. (Middlefield, CT) reported sales of $24.3 million for the first quarter of FY1998 (ended September 30), u䂔% over the $18.4 million reported for the same period last year. Net income rose to $1.7 million, compared to a net loss of $7.9 million for first quarter 1997. . . . Optical-component manufacturer Hoya (San Jose, CA) has acquired all of the stock of instrumentation-manufacturer Chromex (Albuquerque, NM) for an undisclosed cash sum; Hoya will operate Chromex as a wholly owned subsidiary. . . . PLD Advanced Automation Systems Inc. (Rockledge, FL) has delivered a thin-film-coating system to Osmic Inc. (Troy, MI) for use in production of optics for metrology and medical instrumentation. . . . Thin-film and optical-component/instrumentation manufacturer Acton Research Corp. (Acton, MA) has named Roy Grayzel as new-product-development manager for the Optical Instrumentation Division. . . . Docter Optics GmbH (Saafield, Germany) has opened a North American sales and marketing office in Mesa, AZ. . . . Contour Metrological & Manufacturing Inc. (Troy, MI) has opened a single-point diamond-turning division to fabricate precision optics. . . . Optical-components manufacturer Precision Optics Corp. (Gardner, MA) reported revenues of $983,708 for the first-quarter of FY1998 (ended September 30), down 63% from the $2,638,374 reported for the same period in the previous year. Net loss for the quarter was $382,240 compared to net income of $258,422 for first-quarter 1997. The decrease in revenues and income was attributed to lower medical and night vision sales. . . . Donnelly Optics Corp. (Tucson, AZ) has brought its 40,000-sq ft production facility on-line.