Mithras optics has over ten years of experience in optics design. In recently years, we has developed optics simulation technique continuously. The core optic techniques of the Mihtras optics technology are listed:
LED secondary optics design
- Compared with LED package optics, the secondary optics design for LEDs means that one place a lens covering the LED in order to adjust the light distribution. This kind of LED optics design is called LED secondary optics, or so-called LED lens design. LED lens products are not a novel ones in the optics industry. However, there are many LED lens are designed through trial and error, or reverse engineering. There are fewer companies investing the forward optics simulation technique to design LED lens. Mithras is the one of the foresight companies with forward optics simulation/design capacity. Based on the simulation fundamental technique, Mithras optics can provide the various FWHM angle of led lens for kinds LED lighting applications under the lens dimensions limit.
LED planar lighting
- LED planar lighting fall into two categories. One is direct type, the other is edge type. The key components are similar to LCD backlight. However, a LED planar lighting is generally applied more, such as a lighting bottom, a non-square planar lighting or a in-direct lighting lamp. Edge type need the light guide plate (LGP) as the key component. The key techniques of the LGP are optical pattern-design and micro-texture design that Mithras optics is sophisticated in.
LED streetlight simulation/design
- The LED streetlight are recently paid attention. The most common issues in the LED streetlight system are heat transfer, electricity and optics. For optics, the LED streetlight goal is to obtain a special intensity distribution that is adjusted throught the LED secondary optics(LED lens/reflectors). For different LED streetlight types, the special intensity distribution could be batwing, oval or be a ideal intensity distribution curve. Based these special intensity distribution types, one can array the LED secondary components to carry out various LED streetlight types.
- PS: The batwing type is one application of the ideal intensity distribution curve. The peak value falls between 50~60 degree.
LED package optics simulation
- LED package optics simulation is so-called LED first optics design. For LED first optics design, it is necessary to consider the near-field optics effects including chip emitter ray, lens, wire, die pattern, filling gel, phosphor and etc.. The most common application of LED package optics simulation is to design the shape of the package lens.
PS.:Near-field is a concept relative to far-field one. At present, there is not a distinct definition about near-field, nevertheless, there is a distinct request that it requires some high accurate ray measurements before running a near-field simulation/design.
Fresnel lens for Solar energy system
- The optics component in concentrator photovoltaic system (CPV system) is the Fresnel lens. Fresnel lens is a historic innovation lens in the optics lens history. Since 1819, almost two hundred years ago, the evolution of Fresnel lens has been very slow. Even for solar energy of CPV sysmtem, the Fresnel lens used in CPV is still an basic form. The Frensnel lens theory is classic, but it is still full-challenge for designer to design a suitable lens in CPV system.
Optics simulation in backlight
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A LED backlight optics simulation includes LGP, LED source, reflect film, diffuser fime, brightness enhance film, pattern layout, micro-texture and etc.. For LED backlight optics simulation, the simulation results can match the real ones measured by CCD. The simulation accuracy is more than 90% in many backlight module cases we had developed.
Diffuser plate optics simulation of the TV or LED lighting.
- To run a diffuser plate simulation is necessary to consider the effect of the particle inside the material, such as MIE effect. It can't take the plate as a black box to define only the properties of the surfaces when running the diffuser plate simulation. This simulation way can help one to understand the light behaviors in a volume material. Under the observation, it is possible to inspire the designer to have a new idea to develope a new diffuser plate.
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