Re: [ATM] FOV by design: An iterative process?

[Richard <cnc@cncservo.co.uk>]

Hi Dominic-Luc,

Friday, March 23, 2007, 8:21:06 AM, you wrote:

DLW> I am not real sure
DLW> how to fix FOV and optimize a design around it,

Can't help you with OSLO, sorry, but it is easy with Zemax so I expect
it is with OSLO too. In Zemax, you go to Fields and set the Image
size, by Angle, Object Height, Paraxial Image Height or Real Image
Height. You can set several target values across the required FOV and
set a weighting factor against each. During optimisation, that
weighting factor is used to weigh the contribution of that angle
toward the final image quality, spot size or whatever it is you are
optimising for.

To tackle your problem I would probably set fields of :

Half Angle Weight
0          1.0
2          0.8
5          0.7
8          0.6
10         0.5
15         0.3

When you create the merit function for optimisation, and entry is then
created for each field angle, weighted accordingly. Same applies to
wavelengths. You may have a wavelength table like a weighted iFdCt :

Wavelength     Weight
0.36501460     0.1
0.48613270     0.5
0.58756180     1.0
0.65627250     0.5
1.01398000     0.1

The should be something in the OSLO help file under the Optimisation
chapter. It may be connected with the FSE command.

-- 

Best regards,
  Richard in the UK

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