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Re: Re[2]: [ATM] Is There a Difference

----- Original Message ----- 
From: "Richard" <cnc@cncservo.co.uk>


> Hi James,
>
> Thought you may like another reference curve for your mirror
> performance graph. This is a 150mm F/8 Ritchey Cretien with two
> element corrector, and with 'perfect' optics. Nice to see just
> how good it can get, eh? :)

Indeed,

How about this, a 360mm F/8 Dall Kirkman with a three element corrector and also 
with "Perfect" Optics.

Strehl Ratio vs. Field

File : C:\Program Files\Zemax\Samples\14.5inch_F8_CassCreature_quartz.ZMX
Title: 14.5" F/8 Cassegrain Creature
Date : SAT JUL 9 2005

Strehl Ratio is dimensionless.
Reference: Centroid.
Field units are in degrees.
Field is oriented along the +y direction.

       Field     Poly   0.4861   0.5876   0.6563
    0.000000   0.9995   0.9993   0.9998   0.9996
    0.033333   0.9995   0.9992   0.9998   0.9996
    0.066667   0.9993   0.9989   0.9997   0.9996
    0.100000   0.9991   0.9985   0.9997   0.9995
    0.133333   0.9988   0.9980   0.9996   0.9995
    0.166667   0.9984   0.9973   0.9995   0.9994
    0.200000   0.9981   0.9967   0.9993   0.9994
    0.233333   0.9979   0.9961   0.9992   0.9993
    0.266667   0.9977   0.9956   0.9992   0.9992
    0.300000   0.9977   0.9952   0.9992   0.9992
    0.333333   0.9977   0.9950   0.9992   0.9991
    0.366667   0.9977   0.9949   0.9993   0.9991
    0.400000   0.9975   0.9947   0.9993   0.9991
    0.433333   0.9965   0.9941   0.9992   0.9989
    0.466667   0.9942   0.9924   0.9985   0.9983
    0.500000   0.9895   0.9887   0.9967   0.9971

Now all I have to do is make it :)

Take Care,
James Lerch
http://lerch.no-ip.com/atm (My telescope construction,testing, and coating site)
http://lerch.no-ip.com/ChangFa_Gen (My 15KW generator project)

"Anything that can happen, will happen" -Stephen Pollock from:
"Particle Physics for Non-Physicists: A Tour of the Microcosmos"

" Press on: nothing in the world can take the place of perseverance.
Talent will not; nothing is more common than unsuccessful men with talent.
Genius will not; unrewarded genius is almost a proverb.
Education will not; the world is full of educated derelicts.
Persistence and determination alone are omnipotent. "
                                                           Calvin Coolidge 

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