Diffractive Optics is one of the most fascinating branches in Optometry. This is because it is considered to be one of the most challenging aspects in Optometry. If you are interested in learning more about this field, then you should know some interesting tips that you can use to help you understand diffractive optics better. Read on to find out more.
Diffractive Optics: What do you mean by this?
Diffractive Optics basically utilize their internal structure to alter the optical path of light. Basically, diffractive optics split the incoming light into a multitude of fragments and then recombine these to form a larger amount of original rays. In case of PF or DO elements, the main property of these elements is to have a virtual hologram of a fixed lens rather than an actual lens. All the optical systems, such as Lenses, reflect light on the retina using wavefront that passes through a medium. The properties of these elements are used to correct chromatic aberrations and to focus light on a very small spot on the retina.
A major issue with diffractive optics is that it leads to image distortions. Some of these issues include halos, ghosts, and ‘spiral’ lens rotors. To deal with these issues, you must use high quality optical elements such as STS or SPH beam splitters. beam splitters correct lens distortion, and this helps to make the object look sharper and larger.
One important tip for using diffractive optical elements in computational imaging is to perform periodic stabilization, which involves taking a series of images of a system on the computer, and then allowing each image to rotate independently on the screen. Once you have performed all of this, you will find that the system has a stable radial field, which is essentially a rotation algorithm. This algorithm uses real-time data taken from the actual scene and is able to fine tune the rotors. This allows for a much more stable representation of the diffractive optical elements, resulting in much better images. Performing a series of rotoscales using this technique allows for a much more refined and accurate result, and can greatly improve image quality.
The last major type of optical element in diffractive optics is called phase Fresnel Elements. These are used in some Lenses like the LSM and Spherical aberration corrected lenses. The main function of phase Fresnel elements is to reduce chromatic aberrations at the focus of the lens. These elements use a series of balls of different sizes to create a small focused spot on the focus and correct the optical aberrations. These elements are widely used in many image systems and are also quite effective in reducing lens chromatic aberration in DSLR cameras.