rays and raytracing Tag

Application Example: Poisson’s Spot

Figure 1. Poisson’s spot irradiance pattern. A 588 nm coherent plane wave source shines behind a circular obstruction with 0.1 mm radius. Coherent irradiance is evaluated at two different distances: On the left side, light 2 mm beyond the obstruction does not undergo significant...

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Application Example: Bessel Beam Generation

Bessel beams are a special type of light propagation that does not diffract. The light distribution of a Bessel beam maintains a tight focus with high irradiance over great distances. Bessel beams are also self-healing, which means that the light pattern will regenerate after being...

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Application Example: Color Mixing Lightpipe

LEDs, have surpassed incandescent light sources in recent years for most applications. Benefits of the LED include compact size, high power efficiency, and a long lifespan. LEDs also have undesirable qualities that optical engineers must address, such as the need for color mixing and collimation....

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Application Example: Dichroic Cold Mirror

The spectral distribution of a broadband light source is important to many optical systems, from white light illuminators to spectrometers. Color Image analysis in FRED produces visualization of color distribution by calculating chromaticity coordinates of each pixel and displaying the resulting RGB values over the...

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Application Example: Fizeau measurement of lens surface

FRED allows for simulation of physical optics phenomena such as diffraction and interference. With this capability, components such as Gaussian laser beams and interferometers can be accurately modeled and incorporated into optical systems. A full description of this application example can be found here: Fizeau measurement...

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Application Example: LED Flashlight

Light Emitting Diodes, or LEDs, have surpassed incandescent light sources in recent years for most applications. Benefits of the LED include compact size, high power efficiency, and a long lifespan [1]. LEDs also have undesirable qualities that optical engineers must address, such as the need...

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Application Example: Maltese Cross Phenomenon

FRED has the capability to simulate polarization of rays through an optical system. Light sources can be randomly, circularly, or linearly polarized. Optical components that filter or manipulate polarization, such as birefringent wave plates and polarizers, can be accurately modeled. One simple example of polarization...

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Application Example: Mobile Displays

Mobile devices such as smartphones, e-readers, and watches are becoming ubiquitous in today’s world. Precise optical engineering is required to optimize the performance of mobile features such as the camera system, sensors, and the display. A key design objective for a mobile display is uniform...

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FRED Preference and Ray Buffer Optimization

[vc_row css_animation="" row_type="row" type="full_width" in_content_menu="" text_align="left" css=".vc_custom_1488004246544{margin: 64px !important;}"][vc_column][vc_column_text]When FRED is installed on a computer for the first time, the default preference settings will not be optimized to leverage the resources available on the machine.  Rather, the default preference settings are deliberately chosen for program...

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Axicon Lens Example

This is a model of a Thorlabs Axicon Lens AX2520-UV which is used in this model to convert a plane wave input beam into a ring profile. The raytrace is performed coherently using FRED’s Gaussian Beam Decomposition technique. To minimize ray errors at the center...

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