Hi there,
In a lens design, how can I simulate modulus of the OTF as a function of focus shift (mm)?
Thanks
-Mona
Solved
Lens Modulus of OTF
Best answer by David.Nguyen
Hi Mona,
I think the easiest is to use a Analyze..Universal Plot..1-D..New.., this allows you to plot the value of a Merit Function operand against a parameter selected from a list.
You can set Independant Variable X as being the thickness of a dummy surface just before the focal plane, and have its value vary around zero, for example +/- 1 mm. You can also specify the number of steps you want to have.
Then, you can set Dependent Variable Y as the operand MTFA (I let you read the Help File about this operand and how to set it up), and you should be good to go :)
Below is the same plot from an example with the Double-Gauss sample file (attached to this post):
I hope this help.
Take care,
David
+2Hi Mona,
I think the easiest is to use a Analyze..Universal Plot..1-D..New.., this allows you to plot the value of a Merit Function operand against a parameter selected from a list.
You can set Independant Variable X as being the thickness of a dummy surface just before the focal plane, and have its value vary around zero, for example +/- 1 mm. You can also specify the number of steps you want to have.
Then, you can set Dependent Variable Y as the operand MTFA (I let you read the Help File about this operand and how to set it up), and you should be good to go :)
Below is the same plot from an example with the Double-Gauss sample file (attached to this post):
I hope this help.
Take care,
David
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