Accession Number:

AD0777851

Title:

Research Directed toward the Development of an Improved Process for Optical Grating Ruling.

Descriptive Note:

Rept. no. 3 (Final) 1 Feb-30 Jun 73,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE SPECTROSCOPY LAB

Personal Author(s):

Report Date:

1973-12-01

Pagination or Media Count:

27.0

Abstract:

The largest interferometrically controlled ruling engine yet constructed, of 18 x 24 inch capacity, has continued in successful use, and has ruled more than 70 large diffraction gratings and echelles, in sizes up to 16 x 24 inches. Replicas of echelles and gratings ruled, and some originals, are now in use at various observatories and in several university laboratories. The machine has proved itself as reliable as much smaller engines, and the principal difficulties in ruling gratings in these previously unattainable sizes are found now to relate to the obtaining of satsifactory blanks, suitable coatings, and to wear of the ruling diamond when total groove length exceeds about 80,000 meters per grating. Echelles having blaze angles up to 84 degrees have been produced and tested, and the various echelle parameters are discussed. Author

Subject Categories:

  • Manufacturing and Industrial Engineering and Control of Production Systems
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE