Aspherical Lens for Thin Laser Beam Uniformity
Today, I'm presenting a case for using an aspherical lens to uniformize a laser beam into a very thin profile. The light initially exhibits a Gaussian distribution, and the original light profile appears as follows. To achieve a very thin and uniform light profile at the image plane, we require the high adjusting power of the aspherical lens. Additionally, we need to accurately define the Gaussian beam from the emission side.
Gaussian Beam Parameters
The Gaussian beam is defined using three key parameters:
- Waist (W): Omega (Z)
- Divergence Angle (θ): Theta
- Rayleigh Range (ZR): ZR
With these definitions input into Zmax, we can define the incident light. The thickness is calculated, and this thickness is used in the model. We ignore the distance from the waist location to the light, focusing on the model starting from the waist location.
Light Homogenization
We aim to homogenize the light at one meter with a weight of 1000. The light output is divided into 40 steps, and the Merit Function is applied using REAY to control the output angle in the Y direction. This control allows for collimated and homogenized light relative to the optical axis.
Calculation and Optimization
The original input light beam profile, visible from object surface number one, lacks uniformity. After collimation and optimization using the Merit Function, the light is traced at the image plane. The light profile at the image plane is mostly within ±0.1 millimeters, indicating successful energy encirclement in a very thin area.
Aspherical Lens Parameters
The aspherical lens reformulates a randomly or regularly distributed Gaussian light into a thin optical profile at the image plane. The lens utilizes terms from the second to the sixteenth. If using the second term deviates from the manufacturing template, it can be omitted, starting from the fourth term to the sixteenth, ensuring a smooth manufacturing experience.
This case demonstrates the effectiveness of an aspherical lens in achieving a thin and uniform laser beam profile.
Today, I'm presenting a case on using an aspherical lens to uniformize a laser beam into a very thin profile. So you can see this light is raising a Gaussian distribution, and the original light profile looks like this.
To achieve a very thin and uniform light profile at the image plane, we need the high adjusting power of the aspherical lens and accurate definition of the Gaussian beam from the emission side.
The Gaussian beam is defined by three key parameters: the waist (ω0), the divergence angle (θ), and the Rayleigh range (ZR). When we input these definitions into Zmax, we can have the incident light, which is defined here.
We calculate the thickness as shown here and use this thickness in our model, ignoring the distance from the waist location to the light. This model starts from the waist location.
We want the light to be homogenized at one meter weight as 1000. We define the light with its output, which is shown here. The output is divided into 40 steps and input into the Mary function, controlling the output angle in the Y direction.
This makes the light collimated and homogenized as the image. The coordinates calculated from the animation are input into the Mary function in 40 steps. This shows the original input light beam profile.
After collimation and optimization from the Mary function, the light is optimized for the collimating lens. We trace the light at the image plane, which looks like this. The majority of the light profile is cycled into ±0.1 millimeters. We can also track the energy here.
The radius of the light energy is cycled in less than 0.1 millimeters. This case shows that even with a favorable call lens, a randomly or regularly distributed Gaussian light can be reformed in the image plane with a very thin optical profile.
It's worth noting that a spherical lens has been used from the second term to the sixteenth term. By using only the force to sixteenth terms, we hope to have a smooth manufacturing experience for these lamps.
