Re: Astigmatism: RMS vs PV ... let's suppose a wavefront has only astigmatism...aberrations.... What's the ratio between RMS and PV in this case? ... (sci.optics)
Re: Have we decided on a definition for THD ? ... When I go to refresh my memory of what the heck THD is, ... One definition expresses THD as ratio of _power_, and other in ratio of _RMS_ volts. ... Since power is proportional to RMS volts squared the two definitions are obviously not equal. ... To get ratio of RMS voltages between signals a, ... (sci.electronics.design)
Re: pupil dilation & halos on bright lights ... >> Know what is the aberrations called. ... >> I know about spherical abberations, coma, astigmatism, turned ... (sci.med.vision)
Re: pupil dilation & halos on bright lights ... > Know what is the aberrations called. ... > I know about spherical abberations, coma, astigmatism, turned ... (sci.med.vision)
Re: Calculation of snr ...power, regardless of what the signal actually is. ... The ratio is a VOLTAGE ratio. ... the standard deviation as the equivalent to RMS noise,... (rec.photo.digital)
