Opinions on Optical Test Teport

Knowing very little about the science of optics, I'd like to hear
opinions on the following test report results. This is a report on a
180mm IMD Mak.

Wave front error - 1/4 wave.
Strehl ratio - 94%
Resolution - 0.7 arc sec.
Spot Size - 14 microns
All tests at 555 nanometers

How do these results measurte up? Good? Bad? OK?

Thanks
Brian A

Not that good of a telescope with only 1/4 wave accuracy on the wavefront.
This means that it barely meets the Raleigh Criteria for a minimally
acceptable telescope.
For a commercial scope, that is really about typical for the catiotropic
class of instruments.

--
There are more Democrats on the Calif. Special Election than Republicans!
Go count if you don't believe me!
Bob May

Brian, most of the 180mm Maks we have seen had numbers in the 1/7th wave
and Strehl Ratios on the 96% and above range.
Gary



Brian A wrote:

Knowing very little about the science of optics, I'd like to hear
opinions on the following test report results. This is a report on a
180mm IMD Mak.

Wave front error - 1/4 wave.
Strehl ratio - 94%
Resolution - 0.7 arc sec.
Spot Size - 14 microns
All tests at 555 nanometers

How do these results measurte up? Good? Bad? OK?

Thanks
Brian A

Thanks all, that's what I was afraid of.

Brian A

A Strehl of 0.94 is good. It says more then the 1/4 wave.

--
Jan
http://home.wanadoo.nl/jhm.vangastel/Astronomy/


"Brian A" schreef in bericht
om...
Knowing very little about the science of optics, I'd like to hear
opinions on the following test report results. This is a report on a
180mm IMD Mak.

Wave front error - 1/4 wave.
Strehl ratio - 94%
Resolution - 0.7 arc sec.
Spot Size - 14 microns
All tests at 555 nanometers

How do these results measurte up? Good? Bad? OK?

Thanks
Brian A