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2437 Topics

H
Haokun.YeMonochrome
asked in Got a question?

An error occurred while exporting Temperature to STAR from ANSYS Mechanical

When I try to export Temperature to STAR from ANSYS Mechanical, the exported MetaFile.txt document is empty with no data in it. I suspect it is caused by the following Mechanical error:User-defined results may not be fully or partially evaluated successfully. There are some cells (or nodes) that do not contain data for the following expression: 1065 = RES9680Note that the results data may not be included in the results file, or the results data may not be available for some cell types.Also note that the Solver module can create elements, such as surface effects or interface elements, the results of which cannot now be scoped in the contour display.What could be the reason for this? How can I solve this problem?One reason I doubt is that in order to add a temperature load to a part of the lens surface, I divided the lens into a part with a temperature load and a part without a temperature load in the x_t file of the model. The contact matching of the mesh has been set up in Mechanical,

1
H
6 minutes ago
A
AsukuInfrared
asked in Got a question?

Optimal position for a protection glass window from sensor surface?

This is a very open question. Any knowledge insights & advice on how to approach this problem from an imaging systems perspective is greatly appreciated.How to model for the optimal distance ΔD required position a parallel plate glass in front of a sensor surface such that particles of a given size/dimensions on the window will not form a focused image on the sensor for a given imaging system such as below?In other words, how to desensitize the window (parallel plate glass) by positioning it between the tube-lens and sensor such that a contamination of size X on the window will not form a focused image on the sensor.Are there any rules-of-thumb that dictate max tolerable contamination size which shall not affect the image quality. Image quality here meaning it does not form a focused image on the sensor (not MTF degradation).Cheers!

0
A
3 hours ago
ceydakoksaal
ceydakoksaalSingle Emitter
asked in Got a question?

configuration problem

 In sequential mode, I am using two different configurations. Is it possible for the starting points of the light to be slightly different in these configurations? If it is possible, how can I do it?

0
ceydakoksaal
6 hours ago
SiHan
SiHanSingle Emitter
asked in Got a question?

Homogeneous Laser Line Validation

Hi,by following this article Top Hat and changing the lens surface to toroidal I optimized a homogeneous laser line along y-axis in sequential mode. At least I believe so, since the spacings between the rays (layout_detailed) are homogeneous.While for the circular top hat profile described in the article Geometrical Image Analysis is a great tool to intuitively check the intensity profile, for me it doesn´t seems to work for the laser line. (beam_profile).Is there a way to analyse the the intensity profile for the laser line in a similar way?I do not really understand why the Geometrical Image Analysis do not work for the laser line. Probably because we still have a gaussian profile along the x-axis?layoutlayout_detailedbeam_profile 

2
SiHan
12 hours ago
M
Maciej.TraczykSingle Emitter
asked in Got a question?

Off-axis mirror - new surface type

Hi Everyone,I try to implement off-axis prabolic mirror (Diameter 300 mm, focal length 1500 mm and off-axis angle ~10 deg [off-axis distance 262 mm]). In the classic way it is quite easy and well describedhttps://support.zemax.com/hc/en-us/articles/1500005486541-How-to-model-an-off-axis-parabolic-mirrorbut when I try use new feature in OS realease 21.3 I can’t achive good results at first time.Sandrine Auriol from Zemax team help me with my problem. So together we decide to create new topic. We think it will be helpful for other users.If we have a look at this sketch from the help file, the Off-axis Conic Freeform is defined in the new (x’,z’) coordinates:So we need to add the tilt -9.98 degrees. In the Off-Axis Conic Freeform, it is half this value.We add this angle as a fold mirror. This tilt is actually easy to calculate.The angle is = atan(sag(Yo)/Yo)Sag(Yo) = curvature * Y0^2 (no bottom term as it is a parabolic with a conic constant of -1)So angle = atan(curvature * Y0^2/Yo) = at

4
D
15 hours ago
icybird
icybirdMonochrome
asked in Got a question?

can I import an excel table as merit function?

I want to create a long merit function with large number of duplicated operand and the input values are results from some formula operation. Can I create the merit function in excel and then copy or import it to the ZEMAX?Or is there a ZPL commend to use to insert operand into a MF? Thanks very much.

2
icybird
1 day ago
EK88
EK88Single Emitter
asked in Got a question?

Importance sampling Limit settings

Hi, the importance sampling have a limit parameter. Its default setting is 1. The help manual says The limit parameter is used to define the maximum solid angle in Steradians of the target sphere as seen from the scatter point. So I assume its maximum value cannot exceed 4*pi? But it turns out I can use any values I want to set the limit parameter. Could you tell me if I understand the manual correctly?Thanks so much Erkang

0
EK88
1 day ago
Aarya
AaryaSingle Emitter
asked in Got a question?

Activation code not recieved

Hey team,I recnetly got my Zemax license number but I didn’t recieve any activation code.How will I know what is the license activation code?I got it as a shared license at my research institute, from the license administrator. I have already been added as an end user.

1
D
Zemax Staff
1 day ago
S
Shaohong.WangSingle Emitter
asked in Got a question?

Natural Vignetting

Does Zemax vignetting plot include “natural vignetting”? I try to compare image uniformity testing data with zemax vignetting calculation.  Thanks!

0
S
1 day ago
ztystar
ztystarInfrared
asked in Got a question?

How to simulate diffraction efficiency of hologram in non-sequential mode with universal plot?

Hi all,Instead of the built-in function to plot diffraction efficiency of hologram vs angle / wavelength, I remember actually we can also use Merit Function like use some operand  to extract the data and then use Universal Plot to plot the diffraction efficiency. Are there anyone who has use this method to plot before could provide me some insights about it? Thank you so much!Best,Kaden

0
ztystar
1 day ago
R
Renaud.LigotInfrared
asked in Got a question?

WFE simulation through Zernike Fringe Phase optimization

HiIn order to simulate WFE in my design, I’ve added a Zernike Fringe Phase surface in the exit pupil. I then generate the desired amount of error through optimization of a merit function with ZERN operand (ZERN(-5)) and I’ve defined the 37 zernike parameters of my surface as variables.It works but it generates almost exactly the same WFE (same WFE amplitude which is expected but also same wavefront shape) at each run of the optimization (I reset all parameters to zero before a new run).What could I do to end up with a different wavefront shape? Thank you

5
R
1 day ago
J
Jacob.Jikku
asked in Got a question?

Operand to control Vignetting

Hello Community,I am trying to optimize a lens that comes after the STOP. When I try to optimize the lens for maximum performance and minimum distortion the STOP gets vignetted as the diameter of the lens is fixed. The clear semi diameter of this lens is fixed and already at its maximum and cannot be increased. The vignetting for the rays from the maximum field is in such a way that the rays from the top half of the STOP are completely avoided and the rays from the bottom half of STOP is only considered. How can this be controlled. Which operand can be used to make sure that at least some of the rays from the top half of the STOP are always used.  I cannot use the option “clear set vignetting” and set new vignetting factors as the initial vignetting values of the STOP cannot be changed. Please see the pictures attached below. Only the rays from the maximum field are shown in the layout.    

0
J
1 day ago
Pradeep
PradeepSingle Emitter
asked in Got a question?

How to model a quartz window for an UVC light source

Dear experts,I am an electronics engineer and trying to perform optical simulation using OpticStudio. I was able to model a UVC source and able to perform raytracing on single and array of LEDs. I am good until this.Now, I am trying to introduce a quartz window between the source and see how the detector would experience the effects. I would assume the quartz window will add reflectionr and refraction. I tried using a rectangular volume and assigned the material as quartz. I could only see the rays getting refracted and nothing was reflected back. Can someone help me what I am doing wrong or what is the right way to do this?

2
Pradeep
2 days ago
alexander_dumont
alexander_dumontInfrared
asked in Got a question?

Trying to sweep a standard surface, not working as expected

Hi allI am using NSQ in Zemax, and trying to set up a swept standard surface, as seen on the attached figure:Current setupHowever, I am not getting the sweep I want. I actually do not get any sweep. As said in this post, The explanation for using a swept surface is a little bit lacking in the Zemax manual. From this post, I've gathered that there is something wrong with my coordinates, but I’m not sure how to fix it. Any help on this would be of great help. I’ve been playing with numbers for a few hours with no success. What I ultimately going for is a 360 degree sweep around the z-axis of the standard surface to create some semblance of a custom annular mirror that I can then optimize,Alex 

2
Kevin Scales
Zemax Staff
2 days ago
CJ27
CJ27Student
asked in Got a question?

Wavefront map for arbitrary surface

Hello there Zemax community,I have an understanding question that maybe you can help me get through. I know that the wavefront map evaluated at the image plane corresponds to the optical path difference or the difference in wavefront with respect to an ideal spherical wavefront with its origin positioned at the exit pupil. In this way, the wavefront map provides an indication of how does the wavefront deviate from the case of an ideal spherical wave (please let me know if my understanding is not accurate)How does this work for wavefront maps evaluated at different surfaces from the final image surface? What is the reference position in this case? For surfaces different than the image surface, does the reference spherical wavefront still holds and makes sense? Finally, I would like to know if there is any way to obtain the “raw wavefront” of the field. Instead of obtaining the difference with respect to a reference, is it possible to extract the phasefront from the field at any given su

4
Kevin Scales
Zemax Staff
2 days ago
Dror Shayovitz
Dror ShayovitzSingle Emitter
asked in Got a question?

Incoherent beam propagation with POP

HiI am trying to propagate a matrix of independent Gaussian beams incoherently, but for some reason it seems that the beams are still interfering with each other (i.e. it seems that the POP is propagating the beams coherently).I have defined the beams as incoherent in a Multimode file:  Which looks like this: In the far field the intensity looks like this: It looks like there is interference (side lobes). Its possible to see it more clearly with a cross-section:If the propagation was incoherent, then the intensity should not dip where I have indicated with the red arrows, right? In addition, I am getting a nonsensical beam parameter product which is too low and implies coherent propagation. Maybe this is a problem with sampling or window size? Or syntax in the Multimode file?Can anyone help? :)

0
Dror Shayovitz
2 days ago
CJ27
CJ27Student
asked in Got a question?

Generating .DAT file for far-field energy flux

Hello there Zemax community,  I am trying to generate a ray dataset from a data array which represents the Poynting flux at the far-field from a nano-structure which generates a somehow Gaussian-like far-field profile. This is the process that I used for generating my far-field intensity:I extract all far-field components (E and H) at a given r distance from my source plane. Using these far-field components I calculate the Poynting vector components. In this case, I have extracted the data over the surface of a half sphere which covers my full upper hemisphere. This data is extracted from an open source FDTD solver and I know how does the intensity distribution should look like. Below plot shows the computed Poynting flux over the sphere surface projected over a 2D plane. (the radial axis is equivalent to the polar axis and the azimuthal axis represents what it is supposed to)  I have followed Zmx help documentation in order to generate a .DAT file from above intensity information. I g

7
Andrew_Davies
3 days ago
Yadong.Wang
Yadong.WangVisible
asked in Got a question?

Illumination merit function in sequential ray tracing

Hello Zemaxers, I am trying some illumination optimizations for a system that maps the homogeneous film to the image plane (kindly see the schematics below). Normally, for imaging system optimization I could use default merit function like spot size. But in this illumination case that the I could think of using REAY the y-coordinates for the 0, 0.7 and 1 fields. Maybe the REAB for the REAB for the ray angle as well. Can you please suggest if there are any other operands that might be useful to set up the constraints of the merit function for this illumination application? Thank you! 

0
Yadong.Wang
3 days ago
A
AsukuInfrared
asked in Got a question?

Double Pass System: Different style for forward and backward rays?

Hello,Is it possible to configure or set the rays to look different after making the fold in a Double Pass system?For instance, is it possible to have default solid lines (fletched/not-fletched) up until it encounters the Double Pass Mirror surface and then apply same or different colored rays accented with styles such as ‘---’ or ‘*-*-*’ to differentiate between delivery and collection rays in an imaging system model?Any workarounds to do this (asking to make some publication quality ray traces)?Best - ASuku

7
PhotonHerder
5 days ago
John.Hygelund
Ultraviolet
John.HygelundUltraviolet
asked in Got a question?

Sequential layout with scatter

I’d like to show scattering in a sequential model layout.It seems that sequential surface scatter is non recognized.I’ve done some experimenting with a non-sequential component with source and scattering surface, but I don’t see any changes with or without the “Scatter NSC Rays” checked in the layout. Can someone point me in the right direction?Thank you,John

3
John.Hygelund
Ultraviolet
6 days ago
John.Hygelund
Ultraviolet
John.HygelundUltraviolet
asked in Got a question?

Radially symmetric scatter surface

Hello all,I would like to model a radially symmetric diffuser shown below in Zemax. Any thoughts or recommendations on how to accomplish this? I’m hoping there is an efficient approach that takes advantage of the radial symmetry, and I’m not forced to create this as a 2D grid phase or grid sag surface. The most relevant section from the attached paper is below. Thanks in advance for your help,John

3
John.Hygelund
Ultraviolet
6 days ago
B
Begad.ElmelligyInfrared
asked in Got a question?

Cylinder 2 Volume with Boolean Native BUG

Hi,I encountered a bug where if I use Cylinder 2 Volume with Boolean native it doesn’t get rendered and it is always ignored by rays. Cylinder Volume works fine with Boolean native. I encountered this bug when I updated to the Ansys version of Opticstudio  I know I can just use Cylinder Volume and match Front R with Back R but I don’t want to go back and track every model and every boolean native that uses Cylinder 2 Volume Thanks,Begad 

5
Andrew_Davies
6 days ago
B
BrandoMonochrome
asked in Got a question?

Optimization of a reflective grating

Hi everyone,I am relatively new to Zemax and currently working on simulating reflective gratings for UV light (10 nm - 50 nm). I have successfully created my model using Toroidal Gratings surface and a multi-config setup with different wavelengths in my region of interest. I can observe diffraction and the various wavelengths in the generated images.Now, I'm looking to optimize different parameters of the system such as angles, surface tilts, thickness, and so on. I believe there might be articles discussing this, but I haven't been able to locate them. Can you help me for this ?Additionally, I attempted to test the wavelength resolution of the system. However, I encountered an issue when trying to set values like 0.01 um and 0.01008 um to achieve a resolution of 0.08 nm. Seems that I cannot set a value smaller that 0.011 um. Is there something specific I should be doing differently? Simulation 

0
B
6 days ago
Jay.Bernal
Jay.BernalSingle Emitter
posted in Got a question?

Generic Optimization MF for Lens Design Problem Solving

Hello Experts,Optimization is the problem solving steps in lens design. For lens designers, I believe they have developed a standard solutions for each lens design problem that would require minor or major tweaks on the operands used - of course, the complexity may depend on a particular type of lens, designer skill and difficulty to achieve the optical performance. Would there be any library where these MF can be shared. Jay

4
Jay.Bernal
6 days ago
M
Mark.WarrenSingle Emitter
asked in Got a question?

CAD Part Zemax Part Designer

Attempting to load a CAD file created from Part Designer into NSC component editor, per the user manual the object type drop down box one of the choices is supposed to be 'CAD Part Zemax Part Designer' that then is supposed to point to the .ZPO file created in Part Designer, it doesn't have that choice, in fact the CAD files are only the typical STL and IGES type of files.  I have OpticsStudio Professional 20.2.1.  

3
Andrew_Davies
7 days ago

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