TY - GEN AU - C J Evans AU - A D Davies AU - R E Parks AU - L-Z Shao C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2000-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.6701 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2000 TI - Interferometric metrology of photomask blanks::approaches using 633 nm wavelength ER -