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With 10 million Analysis Rays, we can look at the data in more detail we can see the spatial and angular performance of the source. With 30 Layout Rays, we can see the basic positioning and distribution of the source in a layout:Īnalysis Rays allow us to run a more robust ray trace and view the results on the detector object. The manufacturer's data sheet tells us that the source is 6 mm diameter and has a typical output of 27 lumens: this data has been added to the Source Radial as well. But this is a fantastically useful capability when we are at an early stage of design and need to know what kind of distribution we need. We will not use this capability in this article, as we are aiming to describe as fully as possible what the experimental data is. Note that the Source Radial allows the angular data to be made variable, and hence we can optimize to identify the desired angular performance for a given application. The Source Radial is a flat, rectangular or elliptical shaped object which emits rays with an angular distribution given by the supplied data. In the Article Attachments there is a file (radial_source.zmx) that contains just two objects: a Source Radial and a Detector Rectangle.
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The "batwing" nature of the angular profile can be clearly seen. Here for example is the luminous intensity of the Luxeon Emitter Red (LXHL-BD01), as provided on the product datasheet. The Source Radial is the simplest way to enter data from a manufacturer's datasheet.
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Under System Explorer.Units, select Lumens.Īs a result, illuminance will be in units of Lux (Lumens.m -2), luminous intensity will be in Candela (Lumens.steradian -1) and radiance will be in Candela.m -2. The key to our approach in this article is to get as close as possible to experimental, measured data in both the spatial (near field) and angular (far-field) distributions.Īs the LED we are modelling is specified in photometric units, we will use photometric units also in our simulation. For example the Source Filament is a good first approximation to an incandescent lamp, the Source Volume Cylinder is useful for modelling fluorescent tubes.
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OpticStudio contains many source objects that can be used as initial approximations to a source's properties. We will discuss modelling multiple Luxeon LEDs in this article, but the design approach can be used for any complex source such as arc lamps or incandescent lights.
#Zemax 16 gaussian source wave number non sequential mode how to#
a ray, but this article discusses how to launch a bundle of rays initially, so that they are an accurate representation of the source's spatial and angular flux distributions. OpticStudio can split, scatter, diffract, refract, reflect, etc. Luxeon is a trademark of Lumileds, Inc.Īccurate source modelling is the key to accurate illumination system modelling. Zemax, LLC thanks Radiant Imaging, Opsira and Lumileds for the experimental data used in this article. This article discusses how to model LEDs or other complex sources in Non-Sequential Mode using the Source Radial, Source File, and by building complex geometries around other source objects. OpticStudio offers several ways to generate accurate source models. When working in Non-Sequential Mode, the first step in building an accurate simulation of an illumination system is often to correctly model the source.