What is TIR technology? Application on high-intensity Bi-LEDs

Global research on LED products utilizing TIR Lens technology indicates a luminous efficacy ranging from 81% to 94%. In reality, new generation auxiliary lighting products are being progressively upgraded and adopting the new TIR Lens technology to deliver superior lighting performance. In this article, let's explore the TIR Lens in more detail with AOZOOM Intelligent Lighting.

What is a TIR lens?

A TIR Lens (Total Internal Reflection lens), also known as a total internal reflection lens, describes the optical phenomenon where light traveling from a medium with a higher refractive index (such as the TIR lens) to a medium with a lower refractive index (such as air) at an angle greater than the critical angle will be entirely reflected instead of being refracted or scattered.

The principle of total internal reflection on a triangular prism

Real-world experiment when shining a Laser beam through a glass prism

In other words, a TIR Lens functions similarly to a reflector, helping to direct all emitted light forward and distribute it more evenly. Additionally, a TIR reflector helps increase efficiency and uniformity of light emission, thereby enhancing the quality and applications of LED lights.

Compare TIR Lens reflectors with traditional reflectors

Evaluating the performance difference between TIR Lenses and regular reflectors

Compare the light beam between TIR (left) and conventional reflector technology (right)

It can be seen that the TIR lens is made from Polycarbonate and completely covers the LED die, allowing for a light transmission rate of up to 90%. Additionally, the focusing lens helps to control and direct the light beam more clearly due to total internal reflection, minimizing light energy loss. In contrast, a conventional reflector cannot control the light beam that does not come into contact with the reflector, leading to poorer lighting efficiency and the potential to cause glare for those facing it.

Comparing the light beam direction efficiency between TIR Lens and regular reflectors.

According to the comparison image, it can be seen that TIR Lens has a better light beam direction capability, with clearer and more focused light compared to using regular reflectors.

Applications 

Two major areas where TIR LENS is widely applied:

• Solar energy concentration: maximizing the amount of energy applied to a receiver, typically a solar cell or a thermal collector;
• Illumination systems: controlling the distribution of light, often so that it is evenly spread over certain areas and completely blocked from other areas.

And several other applications include modern small and lightweight handheld and wearable optical devices that may require nanotechnology.

Typical variables that need to be optimized at the target include total radiant flux, angular distribution of optical radiation, and spatial distribution of optical radiation. ¹ These variables on the target side of the optical system often need to be optimized simultaneously while considering the collection efficiency of the optical system at the source.  

AOZOOM auxiliary lights utilize TIR Lens.

With numerous outstanding advantages in performance, lifespan, durability, energy saving, and environmental friendliness, LED lighting is considered a promising replacement for current and future lighting technology.

However, for LED technology to develop and be applied more widely, it is crucial to introduce solutions that enhance the light quality and reduce the cost of LED lights. Some of these solutions include using a combination of cylindrical lenses, freeform lenses, and lenses for headlights. Among these, the TIR lens (Total Internal Reflection lens) solution with LEDs is considered to have many advantages such as a simple algorithm and high efficiency, making it widely used in various LED lighting applications.

Furthermore, TIR lenses can collimate incident light with a wider angle than traditional reflectors or other types of lenses. However, when the boundary of the TIR lens does not achieve total internal reflection, light can still escape, reducing luminous efficiency. Therefore, to perfect TIR lenses with high efficiency, a retaining ring surrounding the TIR lens is often used to contain the escaping light.

To enhance the luminous efficacy of the LED chip, a Total Internal Reflection lens (TIR Lens) will be specially designed to be compatible with BI LED. This TIR lens applies the principle of total internal reflection to capture all the light emitted from the LED chip and direct the light beam.

TIR lenses are being applied to AOZOOM Bi-beam products.

Realistic Light BI Gầm WASP 3000K

WASP Bi-beam utilizes TIR Lens technology.

WASP Projector Fog Lights - CBAZ Collection

Utilizing TIR (Total Internal Reflection) Lens technology, delivering a focused and concentrated high beam. Combined with a 3000K color temperature for yellow light and high contrast, enhancing visibility for users in adverse weather conditions.

WASP 3000K Bi-beam, from the CBAZ AOZOOM Collection

See more product information here.

Thank you for reading!

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