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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 |
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Opinions on Optical Test Teport
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 |
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Opinions on Optical Test Teport
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 |
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Opinions on Optical Test Teport
Thanks all, that's what I was afraid of.
Brian A |
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Opinions on Optical Test Teport
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 |
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