# ZEMAX optical design

## Main Question or Discussion Point

Hi everybody,
I’m a new user of Zemax, I did some tutorial so I begin to know the functionalities of the soft. But my major trouble comes from the fact that I don’t know really the procedure, the drill.. to make a system from particularities data. For example, I try to do the exercises of the book “Introduction to lens design with Zemax practical example” by Joseph M. Geary. The first homework is a simple lens design from several points, and I have to calculate the mains characteristics.

Input data:
Infinity objet (20mm semi diameter)
Field : 2 incidence: 0° and 5°
Format size of the IMA : rectangular.
Aperture stop: 20 mm semi diameter (plane surface)
Thickness between Aperture Stop and first lens surface: 0
Equiconvex lens
Fnumber: f/10
Lambda: 587nm
Lens Material: BK7

Data to calculate:
EFL
Lens Power
Lens thickness
Radius of curvature R1 and R2
Format size of Ima
Airy disk diameter.

I don’t get to choose the good variables in my system, which cell must be define with marginal ray, chief ray…where start ?!?!

I hope somebody could help me.

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Hi
I was searching the web to clarify a conceptual issue regarding the wavefront map in Zemax. Wavefront map in Zemax is suppose to tell us about the optical aberrations of the system. Now if I propagate a plane parallel beam in vacuum/air from the object to Image plane beam without any optical element in between, then I would expect the wavefront error to be zero at the image plane. But that is not so. For some strange reason, the wavefront aberrations become finite on the image plane. Anywhere between the object and image plane the wavefront error remain zero. I am missing something very trivial here, which is driving me crazy. Could you please shed some light on this? Looking forward to hearing from you.

Something seems to be incorrect in your file, you should not have >1000 waves PV from just the diffraction at the aperture, it should be zero or very very small. Can you attached the zemax file when you post and we can help you figure it out or just call zemax support, they are usually very efficient at getting right to the problem in less than 5 min or so. Michael

Hi everybody,
I’m a new user of Zemax, I did some tutorial so I begin to know the functionalities of the soft. But my major trouble comes from the fact that I don’t know really the procedure, the drill.. to make a system from particularities data. For example, I try to do the exercises of the book “Introduction to lens design with Zemax practical example” by Joseph M. Geary. The first homework is a simple lens design from several points, and I have to calculate the mains characteristics.

Input data:
Infinity objet (20mm semi diameter)
Field : 2 incidence: 0° and 5°
Format size of the IMA : rectangular.
Aperture stop: 20 mm semi diameter (plane surface)
Thickness between Aperture Stop and first lens surface: 0
Equiconvex lens
Fnumber: f/10
Lambda: 587nm
Lens Material: BK7

Data to calculate:
EFL
Lens Power
Lens thickness
Radius of curvature R1 and R2
Format size of Ima
Airy disk diameter.

I don’t get to choose the good variables in my system, which cell must be define with marginal ray, chief ray…where start ?!?!

I hope somebody could help me.