The 4-meter lunar engineering telescope

Details The 4-meter lunar engineering telescope The 4-meter lunar engineering telescope

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1494..147p&link_type=abstract

IN: Space astronomical telescopes and instruments; Proceedings of the Meeting, Orlando, FL, Apr. 1-4, 1991 (A92-45151 19-89). Be

Physics

Optics

Cassegrain Optics, Lunar Based Equipment, Mirrors, Telescopes, Active Control, Lunar Construction Equipment, Pointing Control Systems, Temperature Compensation

Scientific paper

The 16-meter diffraction limited lunar telescope incorporates a primary mirror with 312 one-meter segments; 3 nanometer active optics surface control with laser metrology and hexapod positioners; a space frame structure with one-millimeter stability; and a hexapod mount for pointing. The design data needed to limit risk in this development can be obtained by building a smaller engineering telescope on the moon with all of the features of the 16-meter design. This paper presents a 4.33-meter engineering telescope concept developed by the Summer 1990 Student Program of the NASA/JHU Space Grant Consortium Lunar Telescope Project. The primary mirror, made up of 18 one-meter hexagonal segments, is sized to provide interesting science as well as engineering data. The optics are configured as a Ritchey-Chretien with a coude relay to the focal plane beneath the surface. The optical path is continuously monitored with 3-nanometer precision interferometrically. An active optics processor and piezoelectric actuators operate to maintain the end-to-end optical configuration established by wave front sensing using a guide star. The mirror segments, consisting of a one-centimeter thick faceplate on 30-cm deep ribs, maintain the surface figure to a few nanometers under lunar gravity and thermal environment.

Affiliated with

Also associated with

No associations

Rating

The 4-meter lunar engineering telescope 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 The 4-meter lunar engineering telescope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 4-meter lunar engineering telescope will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-898681