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2857 Topics
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Soroush.MehravarMonochrome
posted in Got a question?
Convert from “Real Image Height” to “Object Angle” and reverse

Hi,   I have a non-rotationally symmetric system and in my application I want to convert “Real Image Height” to “Object Angle” and reverse. The conversion works fine for axially symmetric systems (like Cooke triplet) but it is not working correctly for a non-rotationally symmetric system. By that I mean, when I convert “Real Image Height” to “Object Angle” and then I do reverse, (from “Object Angle” to “Real Image Height”) I do not get the same “Real Image Height” values. I am wondering if there is any issue with “Convert to” or I should use an intermediate step to get the correct conversion.  Thanks,Soroush 

1753
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Luminary
3 years ago
S
Sehui.ChangSingle Emitter
asked in Got a question?
Difference between Detector Surface and Detector Polar

Hello,I am not familiar with non-sequential mode in Zemax and need some helps.Currently I’d like to design simple optical system (singular lens) with arbitrary shape aperture(ex: F-shape, slit, etc.) in front of it and want to get a light intensity distribution in curved detector(or hemispherical shape).So, I think that Detector Surface and/or Detector Polar would be the solutions and they will have the similar results, but I’ve got two different results: 1) Detector surface seems to show focal spot and 2) Detector polar shows just aperture shape image. It makes me confused. Could somebody kindly explain the differences between Detector surface and Detector polar?

4202
R
Ultraviolet
3 years ago
B
BrandoMonochrome
asked in Got a question?
Problem when I simulated an imported image

Hello everyoneI’m new with Zemax and probably I make some errors.I need to simulate an image using the image simulation tool (Analyze > Extended scene analysis > Image simulation). When I select my image, reported below, the software start to compute and then it blocks at 91% and I have to restart the program. The image has 300dpi and it is of 450 kb.Where do I go wrong ? Fig.1 - Image to simulate 

1022
B
3 years ago
D
Donald.RisbridgerVisible
asked in Got a question?
3 micron Gaussian spot setup - non-diverging?

Hi all,I hope you are all still well. Apologies for another query on my part!I have been aiming to simulate a system that consists of a 5x Galilean collimating beam expander consisting of a -50mm plano-concave lens (LC1715-B, Thorlabs) and 250 mm plano-convex lens (LA1461-B-ML, Thorlabs), prior to a 25.4 mm plano-convex focussing lens (LA1951-B, Thorlabs).The beam input to the beam expander is defined as having a 1/e^2 diameter of 2.6 mm, with a peak irradiance of 5.01 x 10^6 W/mm^2 and a divergence of 0.143 degrees (derived from an M^2 of 1.3). This theoretically gives an input beam of 13 mm 1/e^2 diameter into the 25.4 mm focusing lens, with this producing a focussed spot size of 3 micron (albeit with considerable spherical aberration). I wish to plot the axial peak intensity distribution of this rapidly diverging Gaussian spot using POP.I have been able to successfully collimate the beam expander setup using the REAY AND RAED operands within the Merit Function Editor. I did this in

1061
D
3 years ago
M
Marc.DerrienInfrared
posted in Got a question?
Optimization - initial variations for the variables

Hello,I would like to know how the initial variations on the variables during the optimization are defined.It seems that the value used corresponds to a fraction of the original variable, so when this variable starts from 0 the change is very small and does not modify the merit function much, and the optimization is very slow especially for a large number of variables.Would it be possible to define ourselves this starting variation for each variable with a new option?Best regards

2295
Mark.Nicholson
Luminary
3 years ago
G
Girish.PandeyMonochrome
asked in Got a question?
System Analysis of eyepiece, night vision and thermal imager system

Dear all,hope all of you are doing well.I have some questions. Please help. which type of analysis parameter we have to check at the time of designing eyepiece, night vision and thermal imager?what should be the minimum value of analysis parameter requirement to design eyepiece, night vision and thermal imager?  Thankyou

2433
A
3 years ago
Christoph.Bodendorf
Ultraviolet
Christoph.BodendorfUltraviolet
posted in Got a question?
User Defined Apertures and Obscurations

I am working with the User Defined Obscurations as shown in the attached image. It's supposed to be an 'obscuration', as shown in the left plot. 'Aperture type' is set to 'obscuration'. It works as it should, but I can not see the obscuration in the footprint. In the right image, I set 'Aperture type' to 'Aperture'. Again, it does what it should. AND I can see the Aperture, which is nice. Why do I not see the obscuration if set to 'obscuration'? Is it a bug? Or am I doing something wrong? This is the UDA file I am using: --------------------------    ! Outer Disk                 CIR 0 -0.9 80 64                 BRK                 ! Outline        &n

8673
S
3 years ago
P
PhotonikerInfrared
asked in Got a question?
Bug: DetectorView with wrong colorbar position

Hello,  with the newest Zemax version 21.3 we get the following bug with the detector view. The colorbar is shown in th foreground of the detector and it is not possible to change the position.   

491
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Luminary
3 years ago
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baris.tanyeli@transvaro.comSingle Emitter
asked in Got a question?
About downloading radiant source

Hello, i have a problem about downloading the radiant source files. As it shown from the image below, the program does not let me press the ‘download source model’ section. I need to hear about your opinion about this situation. Thank you.P.S. I have Zemax Opticstudio Version 20.1 

2193
Sean.Lin
Zemax Staff
3 years ago
D
Daniel.LiuInfrared
posted in Got a question?
Why is the FFT PSF of the off-axis calculated on an tilt plane?

Hi all，ZEMAX's help manual says that the FFT PSF of the off-axis field of view is calculated on an imaginary plane perpendicular to the incident chief ray of the reference wavelength, and the results of PSF calculated by FFT are generally too optimistic (ie PSF Smaller). Can you tell me why to calculate on an tilt plane？Thanks in advance

1553
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Luminary
3 years ago
Raju.G
Raju.GSingle Emitter
asked in Got a question?
Zemax Studio capabilities

Microlens ArrayHi,I am research student at University of Virginia, I am making micro lens using laser processing and was wondering if Optics studio can be used to simulate light propagation/ray tracing through the micro lens. We have an array of microlens, each being 40 microns in diameter. We also want to know about the sequential and non-sequential.My university email is ng3uy@virginia.edu, if anyone from technical side from Zemax can provide some contact my research advisor and my colleagues have some more questions regarding capabilities. We are willing to get a license for Zemax as we work with a lot of optical device and applications.Best,Raju Gottumukkala

3821
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Luminary
3 years ago
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shamim.pirouzfar@sick.deMonochrome
asked in Got a question?
how to transfer measured BRDF file to the zemax file format

Hello, I have a measured BRDF file with 5 AOI in 3 orientation of the material, I would like to know if you also support converting its format to the suitable format of the OpticStudio? because transformation of the angles are complicated and very time taking for me. origin of the coordinates and definition of the azimuth and longitudinal angles are different in comparison to zemax! 

4731
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Luminary
3 years ago
D
Daoming.DongInfrared
asked in Got a question?
About field height in image simulation

Dear all,I’m confused with the field height setting inside the image simulation tool box. What is the appropriate field height should I set to my system? For example, my system has two field points ((0, 700), (0, -700)), defined by object height in the field editor. What is the appropriate size for me to set the field height in the image simulation tool? Should it be 700 or 1400? Thanks in advance.Daoming

11281
David
Luminary
3 years ago
D
Donald.RisbridgerVisible
asked in Got a question?
Reimaged axicon setup

 Hi all,I hope you are all still doing well.I have been trying to plot the peak irradiance of a reimaged Bessel-Gauss beam produced using a 20 degree axicon (AX2520-B, Thorlabs). The reimaging telescope consists of a 50 mm plano-convex lens (LA1131-B, Thorlabs) and a 35 mm plano-convex lens (LA1027-B, Thorlabs). The first lens (the 50 mm one) is placed 45.5 mm away from the conical tip, as this is its front focal length (approximately 42 mm) away from the centre of the Bessel-zone produced by the axicon.Lens Data windowLayout of reimaged axicon setup, surface 7 highlightedI have been able to obtain sampling that provides an annular ring at the back surface (surface 7, highlighted in above image) of the 50 mm lens (as would be expected), but upon reaching the planar surface of the 35 mm lens the beam shape appears significantly distorted. I have opted for 20 x 20 mm X and Y widths, with a sampling rate of 8192 x 8192.Surface 7 irradiance false colour plot - annular ring                 

14816
D
3 years ago
F
Fatemeh.Jessen-HansenInfrared
asked in Got a question?
Selecting Oversampling and Field heigth in IS

Hi,I am trying to setup the parameters in Image Simulation analysis. However I donnot know what to choose for oversampling that could make sense with my detector setting.Image:I have the input bitmap image, field of stars, with 583x441 pixels in width and height.  I have a detector pixel size of 0.0028mm with 8192x8192 pixels. Increasing the oversampling will generate a better simulated picture indeed. But I donot know what should I select for oversampling of the source bitmap to have a realistic simulated image.Choosing 16X versus None for oversampling drastically change the PSF and simulated imge of course as below. Also for the field height, I have  defined my fields in incident angles and it is defficult to understand for me what field height I need to choose to cover 441 pixels of the input image. Thank youFatemeh 

11532
F
3 years ago
Mike.Jones
En-Lightened
Mike.JonesEn-Lightened
asked in Got a question?
How to create a full-field RELI plot?

I want to plot the relative illumination over the full field of view.  The Relative Illumination utility only gives us ±x, ±y cuts.  I’m working on a ZPL macro to attempt to do that, but is there an easier/faster way?Thanks, Mike

1512
Sean.Lin
Zemax Staff
3 years ago
K
Katrin.SörensenMonochrome
asked in Got a question?
Rotation of non-symmetrical ZBF

Dear all,I have a ZBF which is rotational non-symmetric. After I propagate the mode profile through my rotational non-symmetric system, I couple into a single mode fiber. Now, I want to examine how the coupling efficiency changes due to a rotation of the Input-ZBF (simulated data of a waveguide). I tried adding a Coordinate Break after the Start-Surface, but nothing happens when I change the Tilt about Z on the CB. I guess it has something to do with the rotation matrix, but there must be a way how I can analyze this tolerance. Thank you in advance.Kind regardsKatrin

1745
S
Luminary
3 years ago
C
Clare.CookSingle Emitter
posted in Got a question?
SGRIN.DAT error

Hello! I'm new to OpticStudio, and I'm currently working on analyzing a microscope design that uses Grintech GRIN lenses. Whenever I open any of the files related to this project (including the Zemax file from Grintech's website), I get the error that the material GTAGNEU is not found in the SGRIN.DAT file (image attached). I have not been able to find any way to rectify this, and other people using the files don't seem to be having similar issues. I do have a student Zemax license, if that's relevant. Any help is much appreciated!  

3284
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Luminary
3 years ago
E
Erin.SumflethSingle Emitter
asked in Got a question?
Image Simulation with a curved image plane

Hi all, Does anyone have experience using the image simulation analysis tool, but with a curved object plane and planar image plane? Is this something Zemax would take into account, or should I superimpose my field points onto a planar surface?

4541
Angel Morales
En-Lightened
3 years ago
A
Andrey.KuznetsovInfrared
asked in Got a question?
Simulating Integrating Spheres

I have a question about simulating integrating spheres. There are 2 configurations:Integrating sphere attached to monochromator with QTH light bulb where only the output light from the integrating sphere is of interest, how it comes out from an X inch diameter sphere with Y inch port aperture. It doesn’t matter how the light gets into the integrating sphere, as long as the output light is uniform. The goal is to use the output light in further simulations such as what the light pattern would be after light passes through pin holes and such. An LED light source with filter wheel is attached to integrating sphere, it is important to calculate system efficiency so input light needs to be tracked as well as output light. The goal is to better approximate system efficiency by accounting for light that goes in and out (desired output as well as the input port where LEDs are) of the integrating sphere before it escapes or is absorbed.Does anyone have recommendations or examples in non-sequent

7611
M
3 years ago
Sebastian Saman
Sebastian SamanMonochrome
asked in Got a question?
Merit function does not compute value

Hello, I’m trying to learn how the merit function definitions work. I went through a tutorial on it (https://support.zemax.com/hc/en-us/articles/1500005490261) and thought I understood how it worked, but when I try to implement something similar to what they used in the tutorial, the merit function does not compute the value and it is unable to optimize.Additionally for the merit function types I don’t know what the codes mean exactly. is there some place to find this information? I tried the help (?) with no success. 

10756
Sebastian Saman
3 years ago
K
Khaled.HassanSingle Emitter
asked in Got a question?
Total Internal Reflection

I’ve tried to simulate TIR in fiber with Zemax and can’t overcome the radiation losses happens at the core and clad interface ==> is there a way to make the TIR happens without any losses?

2541
David
Luminary
3 years ago
D
Donald.RisbridgerVisible
asked in Got a question?
Rounded tip axicon modelling

Hi all,I hope you are well!I have been doing some axial intensity modelling of various Thorlabs axicons via the Physical Optics Propagation feature. In particular, I am interested in using the AX2520-B axicon. I have imported this using the Lens Catalog, but I am now interested in trying to model the effect of the rounded tip which is a common manufacturing error (as opposed to the perfectly sharp tip which is assumed in the “ideal” case). This radius of tip curvature is typically within the range of 10s of microns, but I am unsure how to go about implementing this within the Lens Data window for carrying out further Physical Optics Propagation analysis?Thank you for your time and consideration.

12017
D
3 years ago
A
Amit Kumar.DubeySingle Emitter
asked in Got a question?
How to measure beam diameter along the focusing length?

Hi,I would like to measure the beam diameter after focusing lens. My requirement to measure the beam diameter at different location along the focusing length. As shown in image, I am using measurement tool , it does not look precise, some time with minor mouse movement value is changing. Please suggest correct procedure.   

4541
David
Luminary
3 years ago
D
Daniel.LiuInfrared
asked in Got a question?
How to calculate Relative Illuminance through integration

In Help Files of ZEMAX, It tells me that the relative illuminance is calculated by integrating the effective area of the exit pupil observed from the image point. The integration is performed in cosine space, using a uniform grid of image-square cosine space.I would like to know whether it is possible to reproduce the calculation of RI by ZEMAX through ray tracing and programming or other methods? Please feel free to enlighten me.Thank  you allSincerely，Nancy

3952
D
3 years ago

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