Customization and design of new lenses is also available if the offtheshelf. From the information above, the focal length of the lens can be determined, using the thin lens approximation. Is zemax the best program for the optical simulations. Ray tracing is included in virtuallab fusion software on a solid base knowing about limitations of ray optics. Led uniform illumination using double linear fresnel lenses for.
Designing a planoconvex aspheric lens for fiber optics. To convert divergent beams of light into a parallel beam, a collimating lens is needed. Photopia tutorial design a tir collimator lens lti optics. The collimating lens is imported in the software along. This occur because the light source is not placed in the back focal length bfl of the lens. An optical model of the led is useful when designing secondary optic elements such as reflector. The coluvvis and col90uvvis have a 6 mm diameter lens with a confocal length of 8. Zemax delivers design software, training, and support services that set the highest standards for the optical and illumination industries. Collimating lens for lightemittingdiode light source based. A205 secondary optics design considerations for superflux leds application rief 2015 lumileds holding all rights resered. Two nonimaging led collimating lenses developed by engineers at the chinese academy of sciences and xian jiaotong university were designed using a simple and quick process, unlike the complex iterative software design usually used for led optics. A collimator is a device which narrows a beam of particles or waves.
Pdf a novel freeform lens design for collimating uv light. With this information known, it is now time to choose the appropriate collimating lens. Surely it should be a matter of adapting the software to drivers. This paper presents the design of an efficient collimating optical system for an extended light source, namely a highbrightness high divergence light emitting diode led, sized 1x1mm, and viewing angle of. To narrow can mean either to cause the directions of motion to become more aligned in a specific direction i. A freeform collimator lens design for the natural light. We present a linear fresnel lens design for lightemitting. Collimation coupling fiberports can be used to provide a stable platform for coupling light into and out of fcpc, fcapc, or sma terminated fiber with five or six directional adjustments.
Design of led collimating light source based on simulation. Lens surfaces are calculated by geometrical optics and nonimaging optics. Choosing the right optical design software is about more than just the software. Telescope collimating tools telescope accessories at. By using this method, a highly collimating lens with led chip size of 1. Spherical aberration of the proposed lens was corrected so the collimated distance increases. In this tutorial you will use a planoconvex lens to collimate. Dec 31, 20 the collimating lens has a high light energy utilization and a good collimating performance. Design of collimating system for led source 20 shen. Based on this algorithm, a design based on freeform collimating lens is implemented. The lightbrick is a light collector for the natural light illumination system.
Design and optimization of a collimating optical system for. Collimating the light of the source and improving the utilization rate of light energy is crucial. As regards connectorization, collimating or focusing lens systems developed by idil fibres optiques offer two types of inputs, namely pigtails or connectorsadapters. Recollimating most optics to restore the best images is a relatively simple task, and should be done on a regular basis. A tutorial for designing fundamental imaging systems. Conference proceedings papers presentations journals.
A novel lens profile is synthesized with an objective of having an improved collimation using three freeform surfaces and one total internal reflection surface. For a refractive collimator this means that the optical design should be achromatic or apochromatic over the desired wavelength range. A novel freeform lens design for collimating uv light emitted. The simplicity and the flexibility of the design method and system configuration enable this. Collimating or focusing lens system idil fibres optiques. Avantes collimating lenses are optimized for the uvvisnir range 2002500 nm and have anodized aluminum housings.
Optical design of diffractive and freeform solutions for. The collimation system is simulated and optimized in the lighttools software. Lens design software will optimize to a glass number that may not exist, but the closestmatch will yield a very similar glass type that can be purchased. The choice of optical design software strongly depends on your application. The collimator lens is constructed using freeform surfaces which can be calculated through geometricoptics. Free version of the winlens3d optical design package, which provides serious design and analysis tools for optical engineer, student or designer.
This method can be used for any type of light source not only lambertian. Design of collimating system for led source nasaads. Freeform lens design for led collimating illumination. The collimating lens has a high light energy utilization and a good collimating performance. In order to improve collimation you can copy the bfl from the lens property windows and change the zaxis position of the lens to match this number. You are ready for new optical design concepts and by that for. Collimating lens laser focusing lenses optical assemblies. The fred model leds emit light over a full hemisphere, but most lighting applications require directional control over light output. The collimating tools below are mechanical and optical aids that will help you keep the optics of your telescope at their peak to give you the best possible image contrast and resolution every night you go out to observe. A 100 mm clear aperture collimator would be suitable for testing this lens. Keep in mind that tightening the rear retaining ring pulls the lens into the outer barrel, so you need to fully tighten the rear retaining ring to ensure that you are precise when collimating the lens.
A novel freeform lens design for collimating uv light emitted from a led with large divergent angle. Though this method has been used to design a tir collimator lens 11. Thorlabs offers a large selection of aspheric lenses to choose from. Freeform lens design for led collimating illumination optimesa.
Influence of high overload on the collimating lenses of laser ranging systems. The reflection type collimating lens is used in a copper full mirror, while the collimating lens of transmission type is used in zinc selenide lens. Secondary optics design considerations for superflux leds introduction secondary optics are those optics which exist outside of the led package, such as reflector cavities, fresnel lenses, and pillow lenses. The synopsys optical solutions group osg, formerly optical research associates ora, has been providing worldclass support to our code v customers for over 40years.
Every optical system requires some sort of preliminary design. The design lies in a catadioptric rotationally symmetrical system, which modeling and optimization has been done by specific optical design software, zemax, and its development was. Dec 24, 20 design of collimating system for led source shen, yanan. Design a tir collimator lens inside of solidworks using photopias parametric optical design.
A collimating lens for a lightemittingdiode led light source is an essential device widely used in lighting engineering. One example of a hybrid collimator is shown in figure 1. For this application the ideal lens is a b arcoated molded glass aspheric lens with focal length near 5. Advanced photonics journal of applied remote sensing. The fiber launch platforms are ideal for coupling a free space laser into a single mode, multimode, or polarizationmaintaining fiber. After computing the initial dimensions, putting the design into lens design software. There are many tools and many methods out there which help with collimation of a newtonian telescope. Optics tutorial 2 lens and focusing basics youtube. When we design optical systems, we need to decide specifications of optical systems. Beyond selecting the right glasses, finding mechanics to fit the system is an important step. None of them are as easy to use, versatile, and powerful as a collimation webcam.
Laser diodes emit lesscollimated light due to their short cavity, and therefore higher collimation requires a collimating lens. Abstract we present a simple freeform lens design method for an application to led collimating illumination. Secondary optics design considerations for superflux. The collimating lens is imported in the software along with uvled ray. Secondary optics design considerations for superflux leds. Aspheric coefficients were obtained by fitting the even aspheric polynomials to sag data, using the genetic algorithm.
By vincentnm, july 6, 2009 in discussions scopes whole setups. The distance between the lens and the tip of the connector can be adjusted by moving the inner connector ferrule in the lens housing. Collimating the light source in the simulation window you will see that light is not fully collimated. Highlights a planoconvex aspheric lens is designed to collimate the output of the fiber optics. Lighttools is a 3d optical design software that supports virtual prototyping.
A short video showing how an optical engineer uses zemax to create a lens design a collimator for an led. Tutorials for photopia for solidworks optical design software. The method is derived from a basic geometricoptics analysis and construction approach. The method is derived from a basic geometricoptics analysis and. It is produced by bending relativistic electrons i. We present a simple freeform lens design method for an application to led collimating illumination. Collimating lens customize this product compare lenses for extract the collimate beam from the optical fiber or let the collimate beam into the optical fiber. This work brings out a design of freeform collimating lens for modulating ultraviolet light emitted from an ultraviolet light emitting diode uvled. Design of collimating system for led source, proceedings of. Pdf a novel freeform lens design for collimating uv. Since the output of a laser diode is highly divergent, collimating optics are necessary. This design progress does not rely on any software optimization and any complex iterative process. A simple positive lens is not fast enough to refract large angles into a collimated beam. Since aspheric lenses do not introduce spherical aberration, they are commonly chosen when the collimated laser beam is to be between one and five millimeters.
Freeform lens design for led collimating illumination jinjia chen,1, teyuan wang,1 kuanglung huang,2 teshu liu,1 mingda tsai,1 and chintang lin1 1 department of electrical engineering, national changhua university of education, 2 shida road, changhua. The collimating lens is a common convex lens, where the diverging light enters, and the parallel light emits, and this convex lens acts as a straight line. Osa freeform lens design for led collimating illumination. Beyond its ability to manufacture collimating or focusing lens systems idil calculates optics by using zemax industry standard optical system design software. Fiber optic star ceiling led light bedroom design sky ciel etoile sterrenhemel plafond. When the size of the led chip is 1 mm1 mm, the energy utilization rate of the collimating lens is more than 95%, and most lighting area radii are no more than 8 m when the. Jinjia chen,1, teyuan wang,1 kuanglung huang,2 teshu liu,1 mingda tsai,1 and chintang lin1 1 department of electrical engineering, national changhua university of education, 2 shida road, changhua 50074, taiwan. This paper presents the design of a collimator lens for use with the lightbrick that uses total internal reflection as well as convex and concave surfaces. The uvvisnir range collimating lenses have a twopart housing of stainless steel. Collimating lens, collimation optics, laser collimating lens. Leds emit light over a full hemisphere, but most lighting applications require directional control over light output. Size, weight, and appearance must be considered before choosing lens holders and system mounting. To redirect all emitted light, a hybrid refractivereflective lens can be designed. Object is placed at front focal plane of an objective lens, and an image is given at back focal plane of an imaging lens.
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