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3248 Topics
hahapypy
hahapypySingle Emitter
asked in Got a question?
How to convert CodeV Decenter type "Global Coordinates' into Zemax

I have a surface “OBJ_EP’’ in Code V. Its thickness is 7.049 and the decenter of it is below What I did in Zemax: create 3 coordinates breaks ahead of the surface as image below. The first one is coordinate return Orientation XYZ to the global reference surface “ILL_IMS” as CodeV. The second is YZ shift. The final one is tilts (I am aware of that the tilts sign is opposite b/w CodeV and Zemax)However the convert result does not look right. Can anyone help? thanks  

1
hahapypy
2 hours ago
Flurin Herren
Fully Spectral
Flurin HerrenFully Spectral
posted in People & Pointers
Image plane in a STOP analysis workflow

The STAR Module in Ansys Zemax OpticStudio allows users to import FEA datasets and analyse their impact on optical performance. In some optical systems, the load cases on the image plane can significantly affect this performance. For example, a lateral shift of a detector or receiving fiber due to the expansion of the housing in an optomechanical system may have a considerable influence. I`d like to briefly demonstrate how this can be addressed within a STOP workflow using Ansys software packages:On the left, as a starting point, we have an optimised optical system for a transceiver. These types of optical transceivers are widely used in fiber optics communication systems. The geometry is then exported into a CAD environment, where the housing for the transceiver is designed. At this stage, we also design the initial section of the receiving fiber, which represents our optical image plane, as a physical geometry (labelled as Ip in the graph above). The diameter of this geometry should

0
Flurin Herren
Fully Spectral
4 hours ago
DavidV
DavidVSingle Emitter
asked in Got a question?
Including scatter in sequential merit function

Hi All,I’m attempting to model a system where the detector surface essentially acts as a Gaussian scatterer.  My merit function is comprised mainly of GENF operands to determine, after the effective scattering, the ensquared energy as seen by the detector.  I know in the geometric enclosed energy analysis there is a toggle to include scattering, but I cannot find a way to get the Merit Function Editor to include the scattering into the results.  This scattering has a huge impact on the ensquared energy, so I really need to figure out a workaround.  Does anyone have any suggestions? Thanks,Dave.

0
DavidV
3 days ago
Mubeen Mahmood Puthiyangadi
Mubeen Mahmood PuthiyangadiMonochrome
asked in Got a question?
Problem while converting to Blackbox

Hi all,I am encountering a problem while i convert design to black box. Design is with multi configuration. Is it possible to convert the design having multiconfiguration ino blackbox? 

3
David.Nguyen
Luminary
3 days ago
dkominsky
dkominskyMonochrome
asked in Got a question?
Soft criteria in Non-sequential merit function

I’m looking for suggestions on how to achieve soft criteria in a merit function (particularly in non-sequential mode).  For example I’ve got two optical elements, and I’m trying to optimize the system for a tight focus, and one of my variables is the distance between the two objects.  I’ve got a hard criterion (NPZG) in there that says that the space between the two objects must be large enough to ensure they don’t overlap.  What I’m trying to figure out is how to instruct the merit function that, all else being equal, I want that distance minimized as much as possible, but not at the cost of sacrificing focal spot size. I know that I can set the weighting of a particular operand to be very small, but trying to achieve the balance of that against all the other operands, especially when the unit systems can be so radically different seems prone to problems.  

1
David.Nguyen
Luminary
4 days ago
Jonathan C
Jonathan CSingle Emitter
asked in Got a question?
How do you perform Lambertian scattering in IR with a UV source in NSC?

Hello,I have a source that emits ultraviolet light. The light passes through an optical fibre and then hits a material that emits infrared light in a Lambertian manner.How can I ensure that only the rays emitted by the excited surface of my cylinder are all infrared? As you can see in the image below, my source emits infrared light, which is not the case. The small disc above is a detector with which I want to see only the infrared rays of my cylinder.I tried do this according to this tutorial but I don't understand what I am doing wrong.https://support.zemax.com/hc/en-us/articles/1500005575642-How-to-model-fluorescence-using-bulk-scattering 

2
Jonathan C
1 day ago
Corkas
CorkasSingle Emitter
asked in Got a question?
non-sequential mode: hyperhemispherical object

Hi there,I try to model a hyperhemispherical object in the non-sequential mode, however, Zemax won’t let me to do so. I get an error saying “cannot create object because there are too many faces in the source objects”. I tried to use the Boolean operation and substracted a zylinder object from a sphere. This works for truncated spheres until a hemisphere results. If I shift the zylinder further and the result would be a hyperhemispheric object the error occurs. Is there another possiblity to create a hyperhemispherical object? Many thanks for your help! :) 

5
Berta.Bernad
Zemax Staff
3 hours ago
anurag316
anurag316Dark Energy
asked in Got a question?
Parallel rays approximation in Polarization Pupil Map

In the polarization pupil map help, there is a warning "WARNING: The polarization pupil map assumes the rays are close to parallel to the z-axis and only uses the Ex and Ey components of the electric field to calculate the polarization ellipse. If the rays have a significant angle relative to the z-axis, this approximation will be invalid.” I am trying to understand the following 1) Up until what angles is this approximation valid? Is it similar to small angle paraxial approximation where sin(θ) ≈ θ? 2) When rays are not parallel to the z-axis, there is going to be Ex,Ey and Ez components. Is the PPM reporting the projection of this on the x,y plane? i.e. is it reporting Ex and Ey components and ignoring the Ez component? If that’s the case, we should be able to calculate Ez using k.E = 0 since we can get the ray direction.

0
anurag316
5 days ago
S
Shaojie. ChenInfrared
asked in Got a question?
Export .stp file without beam showing

Hi,I’m trying to export a .stp file that includes both optical components and beams for the opto-mechanical design. However, despite trying different settings a few times, I still haven’t been able to include the beams. The layout is shown below.Has anyone had experience with this or suggestions on how to resolve the issue? 

4
Keke.Zhu
3 days ago
Tiago117
Tiago117Monochrome
asked in Got a question?
How to circularize an elliptical beam

Hello,I'm trying to take an elliptical beam (example from a laser - 26deg in X and 37deg in Y) as defined by the POP settings, using Gaussian Angle, and use a polynomial lens to circularize it.My problem is that I get a better fiber coupling efficiency using a standard circular aspherical lens than what the optimization wizard gives me for the polynomial lens.Are my assumptions wrong from the start or am I simply doing something wrong with the software?In steps:I define in the POP settings a Gaussian beam with an elliptical profile:In one simulation, I select an Even Asphere and using the POPD merit function, I get 93% mode coupling efficiency from a lens initially designed for a circular beam. The initial optimization wasn't even for the elliptical beam. It was for a circular one.But when I change the lens surface to a Polynomial one and set the different X and Y coefficients to variables, the simulation seems to only give me below 90% mode coupling efficiency. It never seems to reall

4
Tiago117
6 days ago
whit2452
whit2452Single Emitter
asked in Got a question?
How to model atmospheric dispersion

Hello there, how do you model atmospheric dispersion in Zemax? I have been searching online and can only find papers publishing the results of dispersion, no directions on how to implement it into my design. According to a source, “ZEMAX has a built-in atmospheric model to simulate the effects of refraction through Earth’s atmosphere. Six parameters control the model: observed zenith angle, ambient temperature, atmospheric pressure at the observer, relative humidity, height of the observer above sea level, and latitude of the observer.”How do I model this? I can adjust temperature and pressure in the environment window. Clarification would be greatly appreciated!

2
Sean Turner
Ultraviolet
7 days ago
Vlad I
Vlad IDark Energy
asked in Got a question?
Single Mode Source Diode

I am looking at parameters list for a source diodeParameters 7 - 9 are divergence anglesParameters 16 - 18 are Gaussian widths of the spatial distribution But doesn’t Gaussian widths define divergence for the Gaussian beam at its waist ?Should be parameter be connected for M2=1?    

0
Vlad I
10 days ago
Yang.Yongtao
Ultraviolet
Yang.YongtaoUltraviolet
asked in Got a question?
How to set a wavelength bandpass filter in sequential mode?

Hi Zemaxers  In sequential mode, how to set a filter like below? or is it possible to set such a layout in sequential mode?The filter has two parts, the upper area blocks 500nm and below, and the other half is OK for all wavelengths. Best regardsYANG

7
Yang.Yongtao
Ultraviolet
4 days ago
E
Zemax Staff
Erin.ElliottZemax Staff
posted in People & Pointers
Setup tips in nonsequential mode: An off-axis parabola example

Objects in nonsequential mode can be used as reference points, and set so that they don’t interact with the rays.  This is useful for setting up folded systems, Boolean objects that are combinations of other objects, and systems with CAD parts referenced to a mechanical coordinate system.  Also, Source Rays can be used with optimization to automatically position parts along a gut ray. An off-axis parabola (OAP) created as a Boolean combination of two other objectsI’ve created an off-axis parabola (OAP) file that illustrates those techniques.  The mirror is a Boolean combination of two objects: a parabolic “lens” and a cylinder volume.  I’ve placed spheres at the origin of each part by referencing the Sphere to its object in the Ref. Object column of the Nonsequential Component Editor (NSCE).  I’ve also color-coded rows and objects to display in the same color using,Properties / Type / Row Color and Properties / Draw / Object Color. NSCE with reference spheres, axes, and source rays use

0
E
Zemax Staff
11 days ago
whit2452
whit2452Single Emitter
asked in Got a question?
How to make Reflective Slit

Hello there, the question is as the title states. I want to design an assembly where there is a reflective slit, how do I enable some of the rays to pass through the aperture and the other ryas to be reflected at an angle into another camera? I’ve seen resources on multi-configurations, but that is not quite what I am doing. Any resources or examples of others doing this greatly appreciated. I know it is possible, just not sure how. 

1
David.Nguyen
Luminary
12 days ago
David.Nguyen
Luminary
David.NguyenLuminary
asked in Got a question?
How to explain the location of the object principal plane in a thick plano-convex lens

From reading this interesting discussion below.I went down a rabbit hole when I was figuring out where the object principal plane of a thick plano-convex lens is. I’ve been taught to find the principal planes like its described at RP Photonics, that is:extrapolate the ingoing and outgoing rays such that they meet in a planeHowever, when rays parallel to the optical axis enter through the plane face of the lens, the ingoing and outgoing rays will meet exactly along the convex face, which is not a plane.Therefore, I believe the principal plane is defined as the plane coincident with the convex surface vertex. At least, this is what I’ve taken away when I used OpticStudio (surface 1 is the convex surface).I also found this information here:Plano-convex and plano-concave lenses have one principal plane that intersects the optical axis, at the edge of the curved surface, and the other plane buried inside the glass.I can accept this definition, but I was curious, from a teaching perspective,

4
Jeff.Wilde
Luminary
11 days ago
Kel.P
Kel.PSingle Emitter
asked in Got a question?
OpticStudio crashes when using the tilt/decenter feature in the lens data editor

I have a sequential model that already contains quite a few coordinate breaks. Today, when trying to use the “Tilt/Decenter Elements” button, the software simply closed without an error message after I clicked “OK” on the pop-up window. I now can’t use the function at all without the software crashing. I have tried:- docking all windows- removing all analysis windows so that only the Lens Data Editor is open- removing all solves- using a variant of the same model saved as a separate file (worked for the first element I tried, then crashed after I tried tilting/decentering a few more elements).It seems to work if I create a simpler lens model that has fewer surfaces and coordinate breaks, or if I create coordinate breaks by adding new surfaces and changing the surface type.I have checked Windows Task Manager and saw that the CPU usage and memory don't increase during the crash.I am using version 2023 R1.

3
Kel.P
8 hours ago
Masato.Aketagawa
Masato.AketagawaSingle Emitter
asked in Got a question?
About the units of Zernike coefficients listed in Zemax lens data

In Zemax lens data, please tell me the units of the Zernike coefficients listed in the Zernike surface column, the units of the beam size listed in the light source column, and whether the beam is a radius or a diameter.

0
Masato.Aketagawa
15 days ago
Rich_G
Rich_GSingle Emitter
asked in Got a question?
Wavefront Change at Image Plane and Just Before Image Plane

Why and how does the wavefront change by such a large amount (~10x) between the line just before the image plane and the image plane where the line before is at the image plane position and makes no changes (neutral/dummy line).

3
Jeff.Wilde
Luminary
14 days ago
CJ27
CJ27Student
asked in Got a question?
High NA system design - Collimated beam

Hi there friends from the OpticStudio community,Today I have a question related to a general optics design problem.I’m trying to generate a system similar to what is presented in the following publication:https://opg.optica.org/ol/fulltext.cfm?uri=ol-42-6-1043&id=360492In essence, the design problem consists of generating a high NA system which can be used to image molecules or atoms in a vacuum environment. The approach used in this case consists of using a Weierstrass type solid immersion lens in combination with two aspherical surfaces in order to generate a collimated beam for an on axis point object.Since the geometry of the Weierstrass geometry is fixed, the only degrees of freedom that I have are the parameters related to my two aspherical surfaces. In the following figure you can take a look to the system I have at the moment:In this case, I optimized this system in the afocal configuration with the merit function defined to have a well corrected planar wavefront. After tha

4
Jeff.Wilde
Luminary
17 days ago
whit2452
whit2452Single Emitter
asked in Got a question?
How to plot all field lines on a PSF

Hello there, I have a basic system of lenses focusing incoming light from a laser beam onto a camera. I have a 1000 um pinhole slit, and populated it with various field lines. My question now is how can I measure the spot size or point spread function of the beam accounting for ALL field lines. The spot diagram gives me the RMS but only of each unique field line, not combined. The footprint diagram shows the overlay of each field line but does not give me a measured spot size.The PSF does not allow me to plot more than 1 field line at a time.  Thank you for any guidance, this community has been very helpful in the past.  This is my very basic design. Order of surfaces is pinhole slit, collimating lens, diffraction grating, focusing lens, and camera detector.  

1
David.Nguyen
Luminary
19 days ago
John.Hygelund
Fully Spectral
John.HygelundFully Spectral
asked in Got a question?
How to update lens prescription inside tolerance script

I would like to update LDE parameters inside a tolerance script.For example, I want to perform the tolerancing and compensator optimization under the simulated alignment conditions, and then change the object distance and curvature to the use case and then recompute the merit function. I don’t see any tolerance script commands that allow updates to the lens prescription.Any advice is greatly appreciated!-John

5
Sean Turner
Ultraviolet
17 days ago
Yujie
YujieStudent
asked in Got a question?
Question about the merit operator of the RMS radius in the Full Field Spot Diagram

Hi Experts, I’m working on optimizing and evaluating system performance across different fields of view using the RMS radius in the Full Field Spot Diagram (not just the Spot Diagram) in the Merit Function and Universal Plot. Our application requires evaluating all fields of view together or treating them as one. I’m familiar with RSRE and other operators, but they seem to focus more on a single field of view in the Spot Diagram. I haven’t come across an operator that calculates the RMS radius for the Full Field Spot Diagram.If anyone could offer some guidance or suggestions, I would be truly grateful. Thank you so much in advance for your help! 

2
Yujie
18 days ago
G
guangjun.gao@nasa.gov
asked in People & Pointers
How to apply a as-measured surface irregularity DAT file on the clear aperture of OAP?

Hi, all, I have a as-measured surface irregularity file (converted from Zygo int into zemax dat file). I need to apply this on the clear aperture of off-axis parabola (OAP) surface. However, it seems that this DAT is applied on the vertex of OAP mirror, rather than the clear aperture of OAP. Is there a way to shift the DAT file so that it is applied on the clear aperture?  Thanks. [See the attached zar file for detail]  

1
G
20 days ago
Tiago117
Tiago117Monochrome
asked in Got a question?
How to design a prism with a lens (one continuous solid)?

Hello,I'm trying to create a prism in the software, using sequential mode, and encountering some issues. But I have since found an example that does some things differently, so maybe there is a way forward.Basically, light enters a prism through a wall, at 90deg, and then encounters a 45deg wall, that will induce total internal reflection. But instead of simply coming out of the other flat surface, my device will have a lens on that side, and a much longer path. All of this is being done inside a solid. Meaning, no joined parts or anything. Just one big block of material.I took the sample and edited it to approximate my desire. All dimensions are exaggerated.The thing is, when i tried to do it, I encountered some problems. Although i can start to see why, based on the sample, that I didn't make use of distances in the coordinate breaks. Also, in my simulation, I kept having erratic and non repeatable results in terms of efficiency.And as you can see, my prism is "inside" my lens, of so

13
David.Nguyen
Luminary
14 days ago

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