Hi community.Iam have started using zemax to designing an Telecentric F thetha lens for my application.could some one help me with crirtical operands for deisgning a Telecentric F thetha lens?
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F thetha field curvature
Best answer by Michael.Young
The merit function operand that will calculate the f-theta condition is DISC.
For constraining the system to be telecentric, you can do a few things.
You can,
- Use the RAID command to constrain incident angle of the pupil coordinates (P = 0) rays to be zero. You enter multiple RAID operands or lines and evaluate at different field coordinates (H) values.
- You can use the exit pupil position (EXPP) operand and set the target distance to a very large (near infinite) value to the left (negative value). Instead of optimizing on a large value, you can use the RECI operand to reference the value of one over the EXPP and drive that to 0.
+1The merit function operand that will calculate the f-theta condition is DISC.
For constraining the system to be telecentric, you can do a few things.
You can,
- Use the RAID command to constrain incident angle of the pupil coordinates (P = 0) rays to be zero. You enter multiple RAID operands or lines and evaluate at different field coordinates (H) values.
- You can use the exit pupil position (EXPP) operand and set the target distance to a very large (near infinite) value to the left (negative value). Instead of optimizing on a large value, you can use the RECI operand to reference the value of one over the EXPP and drive that to 0.
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