Progress toward making lightweight 8 M mirrors of short focal length

Details Progress toward making lightweight 8 M mirrors of short focal length Progress toward making lightweight 8 M mirrors of short focal length

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..636a&link_type=abstract

IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 2 (A91-23201 08-89

Physics

Optics

1

Focal Plane Devices, Mirrors, Optical Materials, Reflecting Telescopes, Temperature Control, Weight Reduction, Astronomical Observatories, Honeycomb Structures, Polishing

Scientific paper

A technique has been developed for casting glass in the form of a honeycomb structure possessing good stiffness despite its low weight, and facilitating thermal control via forced ventilation of the honeycomb cells. To date, 3.5 m diameter mirrors of this type have been successfully cast; fully 8 m diameter mirrors are expected to be cast by 1992. No mirror of diameter as large as 8 m has ever been polished, however, and the difficulties which will be encountered shall be compounded by the shorter focal lengths required for advanced telescopic optics. A novel method, designated 'stressed lap polishing', has been developed to address these problems.

Affiliated with

Also associated with

No associations

Rating

Progress toward making lightweight 8 M mirrors of short focal length does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Progress toward making lightweight 8 M mirrors of short focal length, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Progress toward making lightweight 8 M mirrors of short focal length will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-937990