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3055 Topics
E
EbiVisible
asked in Got a question?
How to define my interest of source file as a Source Object

I have a light source (LED)in my hand with spectral graph, I would like to analyze its spectral distributions in studio. In knowledge base LED modelling is there. But this is not as direct as adding the coating files in catalogue. Help me to fix this.

92613
E
Craig.Whitehill
Craig.WhitehillMonochrome
asked in Got a question?
MTF of plastic lenses

I have designed an imaging lens assembly incorporating two plastic lenses. The first is Zeonex E48R and the other is PMMA. The manufacturer has supplied the lenses well within tolerance, including the surface irregularity P-V. I have remodelled the system incorporating all supplied component tolerances and surface irregularities and i am never getting above a 50% MTF contrast of 50lp/mm compared to the design value of 110lp/mm. The worst case modelled MTF over 1000 Monte Carlo runs is 80lp/mm. Note that i have also included the lens barrel tolerances in the model.Any suggestions as to what could be causing the further consistent loss of MTF, particularly wit plastic lenses? The lenses come from several tooling cavities, but this has no impact on the results. Illumination is at 850nm and the transmission of the filters used has been confirmed as correct. 

2555
Mark.Nicholson
Luminary
T
Taeshin.KimMonochrome
asked in Got a question?
Partially immersed lightpipe

Hi all.I want to make a model as shown below. A beam whose wavelength is 532 nm is incident to the light pipe placed vertically to the bottom. The exit port of the light pipe and the detector are immersed in the water.Even though the water is rolled by some vibrations, the light would not be refracted because the tip of the pipe is under the moving surface.     So, I configured like attached zemax model.The rolling water was simplified to a simple wedge.However, as you see the Layout, the rays are refracted at the surface of the rolling water. It is the wrong result. And if the beam is tilted a little, it has to be refracted at the tip of the pipe, not at the surface of the water.Could you please solve this simple problem?Thanks.

1861
David
Luminary
K
Karen.MartuscelloSingle Emitter
asked in Got a question?
What's the best way to combine components into different systems programmatically?

I have a number of optical subcomponents that can be combined into different systems (think a variety of objectives and tube lenses). Currently if I were to design a new objective and I wanted to see how it performed with all the different tube lenses, I would have to copy and paste it into each tube lens file.I’d like a way to combine these programmatically. I’m imagining two drop down menus, one for objective and one for tube lens, and they’d refer to a library of designs. I’d pick each component and they’d load into one Zemax file, from which I could then calculate mag, MTF, lateral color, etc.What’s the best way to accomplish this? I have some ZPL and Matlab experience and no ZOS-API experience, but I do have several teammates with experience in Matlab, Python, and C# who I can call upon for assistance (and I’ve been meaning to learn Python and C# anyhow).Does anyone have any suggestions for where I should start attempting this project?

6664
Mark.Nicholson
Luminary
C
Fully Spectral
Chandan.MauryaFully Spectral
asked in Got a question?
Absortion loss in light guide

Dear Sir/Madam,I am analyzing a system which is containig a LED and a rectangular light guide of material “PMMA” with Silver coating on the side faces with 6.99mm lenght. LED is having power of 29 lumens and light guide is touching the LED as a result approximately all power is coupling to the light guide.But at the output of light guide I am getting only around 22 lumen. But light guide is having only 6.99mm length, so it is not digestable to have only 22 lumen at output. While ray tracing I am enabling “use polarization” and “ignore error”. Is this power at output is fare enough or I am doing something wrong, can you help me out?I am attaching the zemax file of  my design.Thanks. 

1812
R
Fully Spectral
A
Anna.panMonochrome
asked in Got a question?
get image simulation result

Using Extended Scene Analysis > image simulation, settings:pixel size=0.02X pixels=3000Y pixels=1000After Save as, we can get the picture as below,but this image simulation result is limited by screen size. Could I get a 3000x1000 pixels image(bmp)?Thank you~   

5944
A
fabian358
fabian358Monochrome
asked in Got a question?
Model Optimization

Hi! I try to optimize an human eye model and I am not sure what is going on… The RMS of spot diagram of normal model is a little bit over 3um and after the optimization it is over 17um, and the Seidel coefficients are higher than before optimization.Can anyone help me understand what is the problem of worse RMS and how can I prevent it? I tried to use different Image Quality types and it didn’t work.Thank you very much! 

4172
David
Luminary
Mark.Nicholson
Luminary
Mark.NicholsonLuminary
posted in Got a question?
Malwarebytes and OS 22.1.1

Hey Zemax team,I was running a Global Optimization today when Malwarebytes decided to quarantine OpticStudio.exe and the link on my desktop to it:I simply restored them from Malwarebytes’ quarantine, but you should register this as a false positive with Malwarebytes to prevent this happening. Lots of organizations won’t simply release files from quarantine as easily as I can.Mark

543
Mark.Nicholson
Luminary
S
Sooraj.M SStudent
asked in Got a question?
Mach-Zehnder interferometer and Power redistribution

I was trying to run the ‘Interference Example 2: A Mach-Zehnder interferometer’ simulation file from the Zemax Opticstudio directory (non-sequential mode), but I couldn’t see any power redistribution between the two output arms of interferometer. The intensity pattern distribution in one arm should be complimentary (negative) to the other one. But it is not happening in simulation. In a perfectly parallel beams with zero divergence, I would expect change in power splitting in output arms with phase difference. That is not happening in the given sample simulation. Please share your comments/explanations for this issue. 

4750
S
D
Dmitriy.KrasnovMonochrome
asked in Got a question?
Circle spacing at the wavefront

Good afternoon, dear colleagues. I’m working with optical testing of the convex aspheric mirror. In the interferogram simulation I’ve got stripes like it is shown at the picture. There is a strange white circle at the edge of interference pattern. On the Optical Path figure you can see something like a break of the plot. Is it possible to fix this wavefront break?I use Binary 2 surface to model diffractive optical element (corrector of spherical aberration). Perhaps, it’s an approximation error of the wavefront, because this surface use polynomials to set a phase shift. Thank you for the future answers! 

761
Mark.Nicholson
Luminary
B
Baekcheon SeongSingle Emitter
asked in Got a question?
How to use the Black Box Lens in non-sequential mode

Hi Zemax I recently implement the Lidar system simulation successfully by referring to the tutorial below.https://support.zemax.com/hc/en-us/articles/4408930472467-Modeling-a-Flash-Lidar-System-Part-1 These days, we are discussing with lens manufacturers to realize our Lidat system.However, it is said that they can provide lens data only in the form of a zemax black box lens. Is there any way for me to analysis the Lidar system using black box lens data?Although many attempts have been made, the NCS mode could not use a black box lens. Best regards,

15033
Ö
Fully Spectral
Julien.Gateau
Julien.GateauSingle Emitter
asked in Got a question?
Flat field concave gratings simulation

Hello,I am currently trying to use a flat-field concave-gratings in an optical spectrometer setup.The latter has improved shape and design so that the grooves are neither parallel nor equidistant. The main purpose is to minimize astigmatism and coma.(typically: https://www.ssioptics.com/product-category/diffraction-gratings/flat-field-concave-gratings/)I am wondering which procedure I should follow in Zemax to create this type of Grating shape and/or if anybody else worked using this king of gratings using Zemax?I am working in sequential mode since it is the one which I am feeling the most confortable with. I used the surface type diffractive grating to create my gratings combined with a concave curvature. However I am quite sure it is not the best way to simulate it, and I will certainly not have a proper estimation of my astigmatism and coma.I am open to invest time to learn non-sequential mode if it is needed.Thanks a lot in advance for your help and suggestions! 

197812
Julien.Gateau
J
Jacob.Jikku
asked in Got a question?
Decenter of a lens as compensator

Hi,I am trying use ‘decenter of a lens’ as a compensator in Tolerancing. For that i have made coordinate breaks before and after the lens that i want to decenter. Then used the tolerancing operand CPAR and used the first coordinate break as the surface and parameter as the x and and y decenter. My question is will the pickup solve on the second coordinate break will cause problems when the Sensitivity based tolerancing is carried out.Is there any other method to use element decenter as a compensator in tolerancing analsis. Thanks in advance. 

4552
J
M
Ultraviolet
MarkusUltraviolet
asked in Got a question?
Mixed POP with Tolerancing Analysis and potentially wrong handling of POP settings

Dear Zemax Team,my optical system is a mixed POP and geometric propagation model, i.e. I have checked “Use Rays to Propagate to Next Surface” in the Lens Data Editor Physical Optics dialog for parts of my optical design, where I don’t expect significant diffraction effects, also improving processing time and avoiding phase aliasing effects.The tolerance analysis adds Dummy surfaces into the design, e.g. for the TEDX operator, which is convenient to see e.g. in the MC_Best.ZMX file.I have noticed that the setting “Use Rays to Propagate to Next Surface” seems to be not set for the dummy surface as in the original lens data (i.e. it is unchecked, althought the original lens data was checked). In my interpretation this means, that the propagation of the dummy surface will be, if I do a physical optics run, as POP propagation, not ray propagation. As my resolution at this Dummy surface is not properly set (or cannot be achieved), the propagation results will be significantly altered if I pr

3534
Kevin Scales
En-Lightened
S
sondeptraiStudent
asked in Got a question?
Technology of surface kinoform

How to evaluate the a manufacturing difficulty of surface kinoform (binary 2)?

1721
Ö
Fully Spectral
E
erfanStudent
asked in Got a question?
Modeling the diffraction efficiency of a volume hologram in a waveguide using Hologram Lens object

Hello Zemax Support Team, I’m trying to model a volume hologram in a film inside a glass substrate. In particular, I’d like to be able to calculate the diffraction efficiency of the structure. However, the system seems to have an unreasonable polarization dependence which causes energy to not be conserved for some polarization states such that {input_power ≠ diffracted_power (1st order) + transmitted_power (0-order)}. I am using the volume hologram feature (set to 1) in the Hologram Lens object in non-sequential mode. Collimated input laser beam is normal to the glass and the outcoupled beam totally internally reflects inside the glass substrate upon diffraction. I have 2 monitors: 1) color detector capturing the 0-order transmission and, 2) color detector capturing the 1st diffraction order. X-linearly polarized light and Y-linearly polarized light produce different diffraction efficiencies, as expected. However, for linear X polarization the sum of the 1st-order diffraction and 0-ord

2821
Ö
Fully Spectral
Raju.G
Raju.GSingle Emitter
asked in Got a question?
IR Laser (2700 nm) Scattering from a paint thinfilm

Hello Zemax users,I started using a Zemax optic studio premium version (21.3).  I am from University of Virginia and want to understand the reflection, scattering and transmission through a glossy paint surface (~50 micron thick) after MIR laser irradiation (10 mm collimated beam) on it. I am unable to find the paint (polymeric) material in Zemax catalogue. Also tried to put coating on plane glass but unable to do. Is it possible to simulate scattering data for 2.7 um wavelength on paint? If yes, kindly help me as I am a new user. I am considering Source rays as source, Rectangular volume as a sample and two detector rectangles as detector surfaces. Am I doing correct?  Can we change the angle of incidence at 45 degree?  

1412
Alissa Wilczynski
Zemax Staff
Raju.G
Raju.GSingle Emitter
asked in Got a question?
Scattering simulation for paint

Dear all, How to design a paint materials (thinfilm) incorporated with TiO2 nanoparticles for scattering? In coating catalogue I could not find similar to our material.Thank you.

1552
Alissa Wilczynski
Zemax Staff
E
EbiVisible
asked in Got a question?
Light Propagation Through Optical Fiber

 I have tried to model the propagation of light through the fiber, but my model doesn't looks it undergoes TIR. Can anybody please help me to identify what parameters should I check and alter ? Expecting your guidance on this for my good understanding. (For your reference i have attached the LDE of Seq & NS and the parameters) Kindly let me know if any more parameters neededCore Nd=1.49 ; Clad Nd=1.43EPD = 0.5 (Syst Expl)Core dia = 0.98 micronClad dia = 1 micronSEQ LDENS LDEActual Expectation:  

71114
S
Luminary
J
Joep.van LuijtSingle Emitter
asked in Got a question?
ZPL macro: Measuring the power on surface for particular angles

I want to measure the amount of power on a surface between particular angles. I used a rectangle detector which parameters 12-15, in the user manual it says it work only for radion intensity. Usermanual: The minimum and maximum x and y direction angles in degrees. These settings are used to control the sensitivity of the detector to rays incident upon the detector at an angle when displaying radiant intensity or radiance in angle space. The default setting is -90.0 degrees to +90.0 degrees in both x and y directions, which allows display of angle data for all rays striking the detector. If the angular range is set to cover a subset of the possible incident angles, rays that strike the detector at angles outside the defined range are ignored ONLY for radiant intensity and radiance in angle space displays. So I used the macro function: Ptotal(i) = NSDD(1,17,0,2) Where I should get the total flux in angle space for all pixels. But this still hold the default value of +90° to -90°.

4835
Jeff.Wilde
Luminary
Y
Ying.WangInfrared
asked in Got a question?
how to define object size in mix mode

Hi,I am setting up a seq and non-seq mix mode, and using Prism45.POB as object for non-sequential component.it requests prism45 to be 8mm, I don’t know where I can input to set up this specific size.Thanks in advance.Ying 

3653
Y
J
Joel.RutkowskiSingle Emitter
asked in Got a question?
Assign same scatter model to all faces/surfaces of CAD object

is there a simple way to assign the same scatter model to all surfaces/faces of a CAD object in Non-sequntial mode.   My object has 50 faces,  if I modfiy it in CAd and re-import I don't want have to re-assign face by face the same scatter model.  

5025
Ö
Fully Spectral
N
Nafiseh.AflakianInfrared
asked in Got a question?
Zernike Standard sag (terms higher than 37)

Hi! I know Zemax has up to 231 Zernike terms for Zernike Standard sag value but I can’t find the Polynomial formula for terms higher than 37. Is there any way I could find what is the mathematical formula for higher order terms? thanks!

3484
N
designerguy13-photonics
designerguy13-photonicsVisible
asked in Got a question?
FTIR Resolution (cm^-1 to nm)

HI community!Actually i was going through the THOR Lab manual for FTIR spectroscopy and got stuck at understanding the  relationship between resolution expressed in wavenumbers (R cm^1-) and in nanometer (R(nm). In the Table-2 (link given below) of that manual, can someone explains the conversion formulae used for calculation ?                     FTIR document reference

19442
designerguy13-photonics
D
DOWON.KIMSingle Emitter
asked in Got a question?
Why beam stops at a certain surface /

Hi,I am doing ray tracing reflected at a TIR prism and faced a problem that beam stops at a certain surface as shown below. Any one can help to solve this ? [Mod update: moved to more appropriate forum]

1882
C

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