Refracting telescopes dominated the nineteenth century ... correct for phase differences by using optical path-length compensators, and then combine the beams so as to form an interferogram ...

[Bill Hammack] elaborates on one such piece of engineering: The Alignment Optical Telescope. The telescope was used to find the position of the Lunar Module in space so that its guidance computer ...

To discuss your specific telescope project optical requirements with the Optical ... With such stable conditions testing, particularly with long path lengths, becomes quantifiable and reliable.

These telescopes utilize segmented mirrors ... Wavefront Correction: Techniques used to adjust the optical path of light to compensate for distortions, ensuring that light waves converge correctly ...

Telescopes are devices used to observe the universe. There are many different types and some are even sited in space. Optical telescopes close optical telescopeA device used to see distant objects ...