The computer based design of automotive reflectors is a must in state-of-the-art lighting systems. LucidShape's "functional geometry" design tool LucidFunGeo supports the design of free form reflectors for all types of automotive lighting. The design of Free Form reflectors is one of the major strengths of LucidShape. A big variety of automotive reflector types can be created and simulated:
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The concept behind this is the new mathematical method called "Macro Focal Surfaces". A set of predefined script applications allows the interactive design of reflector shape and function. These scripts can easily be extended by the user in order to support his own new ideas for future lighting application. This method is fully described in our white paper #007 "LucidShape Macro Focal Surfaces". |
The reflector's shape along with light spread parameters and different light sources can easily be set by using the pre-defined dialog boxes. After the reflector had been calculated and simulated, you can check with a huge variety of test tables if the resulting light intensity distribution meets the regulation requirements. Test tables are available for ECE, SAE & JIS regulations.
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The projector type lamp had become a widely used concept in automotive headlamp applications. LucidFunGeo supports the creation of this module in a sophisticated way. You can easily create your own module with one of the LucidFunGeo applications. The module consists of a light source, a reflector, an optional shield and a projector lens. |
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All parameters can be stored and reloaded at any time by the commands "Save Config" and "Load Config". Several configurations of previously designed reflector examples can be loaded. The light source is defined as either cylindrical, rectangular, circular or as a ray file. It may also be selected from an other previously built model. A number of shields with different rims for ECE or SAE cutoff can be used. The lens can be chosen from a wide range of different lens types, i.e. aspherical, FF fresnel, elliptical, hyperbolical, spherical, planar convex, planar concave, biconvex, biconcave, rotational, extruded, potato chip lens |
This application calculates a light source distribution "reversely" from sensors. It makes use of the method "reverse sensor light", i.e. the light in the sensor is projected back into a virtual light source. This tool can be used for the beam pattern definition for certain driving situations like curved roads. A reverse sensor light is an intensity distribution which would be needed to illuminate a scene resulting in identical light distributions in all sensors. This application presents examples for curve, fog and low beam light.
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The license plate application can be used in regulation committees to find the right illumination. The challenge here is to find the right lamp design for a desired beam pattern. This application creates the setup for a license plate with a lux sensor according to ECE, SAE, JIS, Brasil Contran 692/88 and Argentina 675/92 regulations. The license plate can be illuminated with one, two or three license plate lamps. Because of the small distance between the lamps and the license plate, the license plate lamps should be constructed with ray files. The actual luminance can be compared with the regulations and show whether the individual requirements for the plate dots will meet the regulations or not. |
Example for a measurement:
LID name : lux sensor for plate dots
Regulation : license plate JIS
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Measure Point |
value |
IsOk? |
min |
max |
Position (x,y) in mm |
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P1 |
4.36 |
OK |
2.5 |
-- |
-125,50 |
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P2 |
3.24 |
OK |
2.5 |
-- |
-25,50 |
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P3 |
3.21 |
OK |
2.5 |
-- |
25,50 |
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P4 |
4.29 |
?? |
2.5 |
-- |
125,50 |
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P5 |
0.29 |
?? |
2.5 |
-- |
125,-50 |
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P6 |
0.30 |
?? |
2.5 |
-- |
-25,-50 |
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P7 |
0.22 |
?? |
2.5 |
-- |
25,-50 |
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P8 |
0.29 |
?? |
2.5 |
-- |
125,-50 |
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Lmin |
1.67 |
?? |
2.5 |
-- |
55,0 |
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Checks the retro reflection with test tables. This application creates a setup with your sample retro reflector optic, a light source and sensors. Light from the disk emitter will be reflected from the sample and measured with a sensor. The sample can be inclined in horizontal and vertical direction. Subsequently, the retro reflectance can be checked for different inclination angles according to ECE and SAE regulations. Individual Candela sensors will be created in the setup for each inclination, e.g. by applying the simulate all button. |
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